"""Posts router — list, preview, approve, reject, delete."""

import asyncio
from fastapi import APIRouter, Query, HTTPException
from loguru import logger
from pydantic import BaseModel
from sqlalchemy import select, func, delete, cast, Date, or_
from sqlalchemy.orm import selectinload
from src.utils.database import AsyncSessionLocal
from src.models.database import Post, Trend, WorkflowExecution, Notification
from typing import Optional, List
from datetime import datetime, timedelta

router = APIRouter()

# In-memory registry of active generation tasks: post_id -> asyncio.Task
_generation_tasks: dict = {}


def _music_snippet(p: Post) -> Optional[dict]:
    mt = getattr(p, "music_track", None)
    if not mt:
        return None
    mins, secs = divmod(mt.duration_secs or 0, 60)
    return {
        "id": mt.id,
        "title": mt.title,
        "artist": mt.artist,
        "mood": mt.mood,
        "duration_label": f"{mins}:{secs:02d}",
        "preview_url": mt.preview_url,
    }


def _post_dict(p: Post, trend_topic: Optional[str] = None, workflow_id: Optional[str] = None) -> dict:
    return {
        "id": p.id,
        "trend_id": p.trend_id,
        "trend_topic": trend_topic,
        "workflow_id": workflow_id,
        "content": p.content,
        "post_type": getattr(p, "post_type", "image") or "image",
        "image_url": p.image_url,
        "carousel_urls": getattr(p, "carousel_urls", None),
        "video_url": getattr(p, "video_url", None),
        "link_url": getattr(p, "link_url", None),
        "link_title": getattr(p, "link_title", None),
        "link_description": getattr(p, "link_description", None),
        "platform": p.platform,
        "status": p.status,
        "display_status": "scheduled" if (p.status == "draft" and p.approval_status == "approved" and p.scheduled_at) else p.status,
        "approval_status": p.approval_status,
        "platform_post_id": p.platform_post_id,
        "scheduled_at": p.scheduled_at,
        "published_at": p.published_at,
        "created_at": p.created_at,
        "updated_at": p.updated_at,
        "generation_cost": p.generation_cost,
        "token_count": p.token_count,
        "hallucination_score": getattr(p, "hallucination_score", None),
        "generation_error": getattr(p, "generation_error", None),
        "music_id": getattr(p, "music_id", None),
        "music_track": _music_snippet(p),
        "quality_score": getattr(p, "quality_score", None),
        "quality_breakdown": getattr(p, "quality_breakdown", None),
        "ig_likes": getattr(p, "ig_likes", None),
        "ig_comments": getattr(p, "ig_comments", None),
        "ig_reach": getattr(p, "ig_reach", None),
        "ig_saves": getattr(p, "ig_saves", None),
        "ig_shares": getattr(p, "ig_shares", None),
        "engagement_fetched_at": getattr(p, "engagement_fetched_at", None),
    }


async def _auto_attach_music(post_id: int, content: str, topic: str) -> None:
    """Detect mood from post content, find/import a matching track, attach to post."""
    from src.api.routes.music import _detect_moods, _jamendo_to_track, JAMENDO_MOOD_TAGS
    from src.models.database import MusicTrack
    from src.config import get_settings
    import httpx

    combined = f"{content} {topic}"
    moods = _detect_moods(combined)

    async with AsyncSessionLocal() as session:
        # 1. Try local library first — pick randomly among mood-matched tracks
        import random as _rnd
        track = None
        for mood in moods:
            result = await session.execute(
                select(MusicTrack)
                .where(MusicTrack.is_active == True, MusicTrack.mood == mood)
            )
            candidates = result.scalars().all()
            if candidates:
                track = _rnd.choice(candidates)
                break

        # 2. No local match — search Jamendo, pick random from top 10
        if not track:
            mood = moods[0]
            client_id = get_settings().jamendo_client_id
            if client_id:
                try:
                    tags = JAMENDO_MOOD_TAGS.get(mood, "upbeat")
                    async with httpx.AsyncClient(timeout=10) as client:
                        resp = await client.get(
                            "https://api.jamendo.com/v3.0/tracks/",
                            params={
                                "client_id": client_id,
                                "format": "json",
                                "limit": 10,
                                "include": "musicinfo",
                                "fuzzytags": tags,
                            },
                        )
                        resp.raise_for_status()
                        results = resp.json().get("results", [])
                    if results:
                        t = _jamendo_to_track(_rnd.choice(results))
                        track = MusicTrack(
                            title=t["title"],
                            artist=t.get("artist"),
                            genre=t.get("genre"),
                            mood=mood,
                            bpm=t.get("bpm"),
                            duration_secs=t.get("duration_secs"),
                            preview_url=t.get("preview_url"),
                            cover_url=t.get("cover_url"),
                            tags=t.get("tags", []),
                        )
                        session.add(track)
                        await session.flush()  # get track.id before commit
                except Exception as e:
                    logger.warning(f"[AutoMusic] Jamendo fetch failed: {e}")

        if not track:
            return

        # 3. Attach to post
        post = await session.get(Post, post_id)
        if post:
            post.music_id = track.id
        await session.commit()
        logger.info(f"[AutoMusic] Attached track '{track.title}' (id={track.id}) to post {post_id}")


async def _get_workflow_id(session, post_id: int) -> Optional[str]:
    """Look up the most recent workflow for a given post."""
    result = await session.execute(
        select(WorkflowExecution.workflow_id)
        .where(WorkflowExecution.post_id == post_id)
        .order_by(WorkflowExecution.started_at.desc())
        .limit(1)
    )
    return result.scalar_one_or_none()


async def _get_admin_user_id(session) -> Optional[int]:
    """Return the first admin user's DB id for notification targeting."""
    from src.models.database import User
    result = await session.execute(select(User).where(User.is_active == True).limit(1))
    user = result.scalar_one_or_none()
    return user.id if user else None


async def _create_notification(
    session,
    notification_type: str,
    title: str,
    message: str,
    payload: Optional[dict] = None,
) -> None:
    user_id = await _get_admin_user_id(session)
    session.add(
        Notification(
            user_id=user_id,
            type=notification_type,
            title=title,
            message=message,
            payload=payload or {},
        )
    )


# ── List ───────────────────────────────────────────────────────────────────────

@router.get("/")
async def list_posts(
    page: int = Query(1, ge=1),
    page_size: int = Query(20, ge=1, le=100),
    status: Optional[str] = None,
    platform: Optional[str] = None,
    post_type: Optional[str] = None,
):
    async with AsyncSessionLocal() as session:
        q = select(Post)
        if status:
            q = q.where(Post.status == status)
        if platform:
            q = q.where(Post.platform == platform)
        if post_type:
            q = q.where(Post.post_type == post_type)
        q = q.options(selectinload(Post.music_track)).order_by(Post.created_at.desc()).offset((page - 1) * page_size).limit(page_size)

        count_q = select(func.count(Post.id))
        if status:
            count_q = count_q.where(Post.status == status)
        if platform:
            count_q = count_q.where(Post.platform == platform)
        if post_type:
            count_q = count_q.where(Post.post_type == post_type)

        # SQLAlchemy async sessions don't allow concurrent operations on the same session
        results = await session.execute(q)
        total_row = await session.execute(count_q)
        all_total_row = await session.execute(select(func.count(Post.id)))
        total = total_row.scalar()
        all_total = all_total_row.scalar()
        posts = results.scalars().all()

        # Bulk-fetch trend topics in one query
        trend_ids = list({p.trend_id for p in posts if p.trend_id})
        trend_map: dict = {}
        if trend_ids:
            tr_rows = (await session.execute(
                select(Trend.id, Trend.topic).where(Trend.id.in_(trend_ids))
            )).all()
            trend_map = {r.id: r.topic for r in tr_rows}

        # Bulk-fetch workflow IDs in one query
        post_ids = [p.id for p in posts]
        wf_map: dict = {}
        if post_ids:
            wf_rows = (await session.execute(
                select(WorkflowExecution.post_id, WorkflowExecution.workflow_id)
                .where(WorkflowExecution.post_id.in_(post_ids))
                .distinct(WorkflowExecution.post_id)
                .order_by(WorkflowExecution.post_id, WorkflowExecution.started_at.desc())
            )).all()
            for row in wf_rows:
                if row.post_id not in wf_map:
                    wf_map[row.post_id] = row.workflow_id

        items = [
            _post_dict(p, trend_map.get(p.trend_id), wf_map.get(p.id))
            for p in posts
        ]

        return {"total": total, "all_total": all_total, "page": page, "page_size": page_size, "items": items}


@router.get("/pending-approval")
async def pending_posts(
    page: int = Query(1, ge=1),
    page_size: int = Query(20, ge=1, le=100),
):
    async with AsyncSessionLocal() as session:
        q = select(Post).options(selectinload(Post.music_track)).where(Post.status == "draft").order_by(Post.created_at.desc()).offset((page - 1) * page_size).limit(page_size)
        results = await session.execute(q)
        total_row = await session.execute(select(func.count(Post.id)).where(Post.status == "draft"))
        posts = results.scalars().all()

        trend_ids = list({p.trend_id for p in posts if p.trend_id})
        trend_map: dict = {}
        if trend_ids:
            tr_rows = (await session.execute(select(Trend.id, Trend.topic).where(Trend.id.in_(trend_ids)))).all()
            trend_map = {r.id: r.topic for r in tr_rows}

        post_ids = [p.id for p in posts]
        wf_map: dict = {}
        if post_ids:
            wf_rows = (await session.execute(
                select(WorkflowExecution.post_id, WorkflowExecution.workflow_id)
                .where(WorkflowExecution.post_id.in_(post_ids))
                .distinct(WorkflowExecution.post_id)
                .order_by(WorkflowExecution.post_id, WorkflowExecution.started_at.desc())
            )).all()
            for row in wf_rows:
                if row.post_id not in wf_map:
                    wf_map[row.post_id] = row.workflow_id

        items = [_post_dict(p, trend_map.get(p.trend_id), wf_map.get(p.id)) for p in posts]
        return {"total": total_row.scalar(), "page": page, "page_size": page_size, "items": items}


# ── Analytics ─────────────────────────────────────────────────────────────────

@router.get("/analytics/summary")
async def posts_summary():
    """Overall stats for the dashboard."""
    async with AsyncSessionLocal() as session:
        total = (await session.execute(select(func.count(Post.id)))).scalar()
        published = (
            await session.execute(select(func.count(Post.id)).where(Post.status == "published"))
        ).scalar()
        drafts = (
            await session.execute(select(func.count(Post.id)).where(Post.status == "draft"))
        ).scalar()
        failed = (
            await session.execute(select(func.count(Post.id)).where(Post.status == "failed"))
        ).scalar()

        by_platform = await session.execute(
            select(Post.platform, func.count(Post.id).label("count"))
            .where(Post.status == "published")
            .group_by(Post.platform)
        )

        total_cost = (
            await session.execute(
                select(func.sum(Post.generation_cost)).where(Post.generation_cost.isnot(None))
            )
        ).scalar() or 0.0

        return {
            "total_posts": total,
            "published": published,
            "drafts_pending": drafts,
            "failed": failed,
            "total_cost_usd": round(total_cost, 4),
            "by_platform": [
                {"platform": row.platform, "count": row.count} for row in by_platform.all()
            ],
        }


# ── Preview ───────────────────────────────────────────────────────────────────

@router.get("/calendar")
async def calendar_posts(
    start: datetime = Query(...),
    end: datetime = Query(...),
    limit: int = Query(default=200, le=500),
):
    """Posts that belong in the calendar for a date range."""
    start = start.replace(tzinfo=None)
    end = end.replace(tzinfo=None)
    async with AsyncSessionLocal() as session:
        rows = await session.execute(
            select(Post)
            .options(selectinload(Post.music_track))
            .where(
                or_(
                    Post.scheduled_at.between(start, end),
                    Post.published_at.between(start, end),
                    Post.created_at.between(start, end),
                )
            )
            .order_by(Post.created_at.asc())
            .limit(limit)
        )
        posts = rows.scalars().all()

        # batch-load trends to avoid N+1
        trend_ids = {p.trend_id for p in posts if p.trend_id}
        trend_map: dict = {}
        if trend_ids:
            t_rows = await session.execute(select(Trend).where(Trend.id.in_(trend_ids)))
            trend_map = {t.id: t.topic for t in t_rows.scalars().all()}

        items = []
        for post in posts:
            trend_topic = trend_map.get(post.trend_id) if post.trend_id else None
            item = _post_dict(post, trend_topic, await _get_workflow_id(session, post.id))
            item["calendar_at"] = post.scheduled_at or post.published_at or post.created_at
            items.append(item)
        return {"items": items, "start": start, "end": end, "total": len(items)}


class PostEditBody(BaseModel):
    content: Optional[str] = None
    platform: Optional[str] = None
    post_type: Optional[str] = None
    scheduled_at: Optional[datetime] = None
    image_url: Optional[str] = None
    link_url: Optional[str] = None
    link_title: Optional[str] = None
    link_description: Optional[str] = None


@router.put("/{post_id}")
async def update_post(post_id: int, body: PostEditBody):
    """Edit a draft or failed post before approval/publish."""
    async with AsyncSessionLocal() as session:
        post = await session.get(Post, post_id)
        if not post:
            raise HTTPException(status_code=404, detail="Post not found")
        if post.status == "published":
            raise HTTPException(status_code=400, detail="Published posts cannot be edited")

        fields_set = getattr(body, "model_fields_set", getattr(body, "__fields_set__", set()))
        for field in (
            "content",
            "platform",
            "post_type",
            "scheduled_at",
            "image_url",
            "link_url",
            "link_title",
            "link_description",
        ):
            if field in fields_set:
                setattr(post, field, getattr(body, field))

        post.updated_at = datetime.utcnow()
        await session.commit()
        await session.refresh(post)

        trend_topic = None
        if post.trend_id:
            trend = await session.get(Trend, post.trend_id)
            trend_topic = trend.topic if trend else None
        return _post_dict(post, trend_topic, await _get_workflow_id(session, post.id))


@router.get("/{post_id}/preview")
async def preview_post(post_id: int):
    """Return post content + image URL for preview before approving."""
    async with AsyncSessionLocal() as session:
        post = await session.get(Post, post_id)
        if not post:
            raise HTTPException(status_code=404, detail="Post not found")

        trend_topic = None
        if post.trend_id:
            tr = await session.get(Trend, post.trend_id)
            trend_topic = tr.topic if tr else None

        workflow_id = await _get_workflow_id(session, post.id)

        return {
            "post_id": post.id,
            "trend_topic": trend_topic,
            "workflow_id": workflow_id,
            "caption": post.content,
            "image_url": post.image_url,
            "platform": post.platform,
            "status": post.status,
            "character_count": len(post.content) if post.content else 0,
            "hashtags": [w for w in (post.content or "").split() if w.startswith("#")],
        }


# ── Approve / Reject ─────────────────────────────────────────────────────────

class ApproveBody(BaseModel):
    publish_mode: str = "post"  # "post" | "reel"


@router.post("/{post_id}/approve")
async def approve_post(post_id: int, body: ApproveBody = ApproveBody()):
    """Approve a post — signals Temporal if workflow exists, else updates DB directly."""
    async with AsyncSessionLocal() as session:
        post = await session.get(Post, post_id)
        if not post:
            raise HTTPException(status_code=404, detail="Post not found")
        if post.status == "published":
            return {"message": "Already published", "post_id": post_id}

        workflow_id = await _get_workflow_id(session, post.id)

    # Try to signal Temporal workflow
    if workflow_id:
        try:
            from src.config import get_settings
            from temporalio.client import Client
            settings = get_settings()
            client = await Client.connect(
                f"{settings.temporal_host}:{settings.temporal_port}",
                namespace=settings.temporal_namespace,
            )
            handle = client.get_workflow_handle(workflow_id)
            await handle.signal("approved")
            return {"message": "Approved via Temporal", "workflow_id": workflow_id}
        except Exception:
            pass  # Temporal not running — fall through to direct DB update

    # Direct publish — call Instagram API then update DB
    async with AsyncSessionLocal() as session:
        post = (await session.execute(
            select(Post).where(Post.id == post_id).options(selectinload(Post.music_track))
        )).scalar_one_or_none()
        content = post.content
        image_url = post.image_url
        carousel_urls = getattr(post, "carousel_urls", None) or []
        post_type = post.post_type or "text_image"
        platform = post.platform or "instagram"
        music_url = post.music_track.preview_url if post.music_track else None

    # Auto-improve content quality before publishing
    try:
        from src.services.post_improver import auto_improve
        content, improved_score = await auto_improve(content, post_type)
        # Persist improved content + updated score back to DB
        async with AsyncSessionLocal() as session:
            post_upd = await session.get(Post, post_id)
            if post_upd:
                post_upd.content = content
                post_upd.quality_score = improved_score["score"]
                post_upd.quality_breakdown = improved_score["breakdown"]
                await session.commit()
    except Exception as e:
        logger.warning(f"Auto-improve skipped: {e}")

    # Normalize hashtags in caption — ensure every tag word starts with #
    import re as _re
    def _normalize_caption_hashtags(text: str) -> str:
        def fix_tag_line(m):
            words = m.group(0).split()
            return " ".join(w if w.startswith("#") else f"#{w}" for w in words)
        return _re.sub(r"^(?:#?[A-Za-z][A-Za-z0-9]{2,}\s*){3,}$", fix_tag_line, text, flags=_re.MULTILINE)
    content = _normalize_caption_hashtags(content)

    # Inject auto_hashtags from brand voice (e.g. #dailywireup #news)
    try:
        from src.models.database import BrandVoice as _BV
        async with AsyncSessionLocal() as _s:
            _bv = (await _s.execute(
                select(_BV).where(_BV.is_active == True).limit(1)
            )).scalar_one_or_none()
            if _bv and _bv.auto_hashtags:
                extra = _bv.auto_hashtags.strip()
                if extra and extra not in content:
                    content = content.rstrip() + "\n" + extra
    except Exception:
        pass

    platform_post_id = None
    publish_error = None
    try:
        from src.services.social_media import SocialMediaPublisher
        publisher = SocialMediaPublisher()
        # For carousel posts send all slide images; otherwise single image
        if post_type == "carousel" and carousel_urls:
            publish_images = carousel_urls
        elif image_url:
            publish_images = [image_url]
        else:
            publish_images = []

        # If user chose "reel", force reel publishing regardless of post_type
        effective_type = "carousel" if body.publish_mode == "reel" else post_type
        effective_music = music_url if body.publish_mode == "reel" else (music_url if post_type == "carousel" else None)
        result = await publisher.publish_post(
            platform=platform,
            text=content,
            image_urls=publish_images,
            post_type=effective_type,
            music_url=effective_music,
        )
        if result["success"]:
            platform_post_id = result.get("platform_post_id")
        else:
            publish_error = result.get("error")
            logger.warning(f"Publish failed for post {post_id}: {publish_error}")
    except Exception as e:
        publish_error = str(e)
        logger.error(f"Publish exception for post {post_id}: {e}")

    async with AsyncSessionLocal() as session:
        post = await session.get(Post, post_id)
        post.approval_status = "approved"
        if platform_post_id:
            post.status = "published"
            post.published_at = datetime.utcnow()
            post.generation_error = None
            post.platform_post_id = platform_post_id
        else:
            post.status = "failed"
            post.generation_error = publish_error or "Publish failed"
            await _create_notification(
                session,
                "publish_failed",
                f"Post #{post_id} failed to publish",
                post.generation_error,
                {"post_id": post_id, "platform": platform},
            )
        await session.commit()

    if platform_post_id:
        return {"message": "Approved and published to Instagram", "post_id": post_id, "platform_post_id": platform_post_id}
    return {"message": "Approved but publish failed", "post_id": post_id, "error": publish_error}


@router.post("/{post_id}/reject")
async def reject_post(post_id: int):
    """Reject a post — signals Temporal if workflow exists, else updates DB directly."""
    async with AsyncSessionLocal() as session:
        post = await session.get(Post, post_id)
        if not post:
            raise HTTPException(status_code=404, detail="Post not found")

        workflow_id = await _get_workflow_id(session, post.id)

    # Try to signal Temporal workflow
    if workflow_id:
        try:
            from src.config import get_settings
            from temporalio.client import Client
            settings = get_settings()
            client = await Client.connect(
                f"{settings.temporal_host}:{settings.temporal_port}",
                namespace=settings.temporal_namespace,
            )
            handle = client.get_workflow_handle(workflow_id)
            await handle.signal("rejected")
            return {"message": "Rejected via Temporal", "workflow_id": workflow_id}
        except Exception:
            pass  # Temporal not running — fall through to direct DB update

    # Direct DB update
    async with AsyncSessionLocal() as session:
        post = await session.get(Post, post_id)
        post.approval_status = "rejected"
        post.status = "failed"
        await session.commit()
    return {"message": "Rejected directly", "post_id": post_id}


# ── Delete ────────────────────────────────────────────────────────────────────

@router.post("/{post_id}/regenerate")
async def regenerate_post(post_id: int):
    """Re-run the generation pipeline for a failed or draft post using the same trend."""
    import asyncio
    from src.temporal_workflows.pipeline import (
        generate_post_content, generate_images, store_media_to_cdn, save_post_draft,
        GeneratePostInput, GenerateImagesInput, StoreMediaInput, SavePostDraftInput, TrendData,
    )

    async with AsyncSessionLocal() as session:
        post = await session.get(Post, post_id)
        if not post:
            raise HTTPException(status_code=404, detail="Post not found")
        if post.status == "published":
            raise HTTPException(status_code=400, detail="Cannot regenerate a published post")
        trend_id = post.trend_id
        platform = post.platform or "instagram"
        post_type = getattr(post, "post_type", "image") or "image"

        trend_row = await session.get(Trend, trend_id) if trend_id else None

    if not trend_row:
        raise HTTPException(status_code=404, detail="Original trend not found — cannot regenerate")

    trend_data = TrendData(
        trend_id=trend_row.id,
        topic=trend_row.topic,
        source=trend_row.source,
        score=trend_row.score or 0.0,
        raw_data=trend_row.raw_data,
    )

    # Reset post to generating state immediately
    async with AsyncSessionLocal() as session:
        post = await session.get(Post, post_id)
        post.status = "generating"
        post.content = f"Regenerating post about: {trend_data.topic}"
        post.image_url = None
        post.generation_error = None
        await session.commit()

    async def _run():
        try:
            post_data = await generate_post_content(GeneratePostInput(trend=trend_data, agent_version_id=1))
            effective_type = post_type or post_data.post_type
            images = await generate_images(GenerateImagesInput(
                topic=trend_data.topic, count=1, image_prompt=post_data.image_prompt,
                post_type=effective_type,
                carousel_image_prompts=post_data.carousel_image_prompts if effective_type == "carousel" else None,
            ))
            cdn_images = await store_media_to_cdn(StoreMediaInput(images=images, post_id=post_id))
            await save_post_draft(SavePostDraftInput(
                post=post_data, trend_id=trend_id, agent_version_id=1,
                images=cdn_images, platform=platform, post_type=post_type,
                placeholder_id=post_id,
            ))
            logger.info(f"[Regenerate] Post {post_id} regenerated successfully")
        except Exception as e:
            logger.error(f"[Regenerate] Failed for post {post_id}: {e}")
            async with AsyncSessionLocal() as session:
                post = await session.get(Post, post_id)
                if post:
                    post.status = "failed"
                    post.content = f"Regeneration failed: {e}"
                    post.generation_error = str(e)
                    await _create_notification(
                        session,
                        "generation_failed",
                        f"Post #{post_id} regeneration failed",
                        str(e),
                        {"post_id": post_id},
                    )
                    await session.commit()

    asyncio.create_task(_run())
    return {"message": "Regeneration started", "post_id": post_id}


@router.post("/{post_id}/regenerate-image")
async def regenerate_image(post_id: int):
    """Re-generate only the image for a post, keeping the caption unchanged."""
    import asyncio
    from src.temporal_workflows.pipeline import (
        generate_images, store_media_to_cdn,
        GenerateImagesInput, StoreMediaInput, TrendData,
    )
    async with AsyncSessionLocal() as session:
        post = await session.get(Post, post_id)
        if not post:
            raise HTTPException(status_code=404, detail="Post not found")
        if post.status == "published":
            raise HTTPException(status_code=400, detail="Cannot regenerate image on a published post")
        trend_row = await session.get(Trend, post.trend_id) if post.trend_id else None
        topic = trend_row.topic if trend_row else (post.content or "")[:80]
        post_type = getattr(post, "post_type", "image") or "image"

    async def _run_image():
        try:
            images = await generate_images(GenerateImagesInput(
                topic=topic, count=1, image_prompt=None, post_type=post_type,
            ))
            cdn = await store_media_to_cdn(StoreMediaInput(images=images, post_id=post_id))
            new_url = cdn.get("image_url") or cdn.get("cover_url")
            if new_url:
                async with AsyncSessionLocal() as session:
                    post = await session.get(Post, post_id)
                    if post:
                        post.image_url = new_url
                        post.updated_at = datetime.utcnow()
                        await session.commit()
                logger.info(f"[RegenerateImage] Post {post_id} new image: {new_url}")
        except Exception as e:
            logger.error(f"[RegenerateImage] Failed for post {post_id}: {e}")

    asyncio.create_task(_run_image())
    return {"message": "Image regeneration started", "post_id": post_id}


@router.get("/{post_id}/insights")
async def post_insights(post_id: int):
    """Fetch Instagram media insights for a published post."""
    import httpx, os
    async with AsyncSessionLocal() as session:
        post = await session.get(Post, post_id)
        if not post:
            raise HTTPException(status_code=404, detail="Post not found")
        media_id = post.platform_post_id
        platform = post.platform or "instagram"

    if not media_id:
        return {"available": False, "reason": "Post not published or missing platform ID"}
    if platform.lower() != "instagram":
        return {"available": False, "reason": f"Insights only available for Instagram (this is {platform})"}

    from src.config import get_settings as _gs
    token = _gs().instagram_access_token or os.getenv("INSTAGRAM_ACCESS_TOKEN", "")
    if not token:
        return {"available": False, "reason": "Instagram token not configured"}

    try:
        async with httpx.AsyncClient(timeout=10) as client:
            resp = await client.get(
                f"https://graph.facebook.com/v22.0/{media_id}/insights",
                params={
                    "metric": "reach,saved,likes,comments,shares,total_interactions,views",
                    "access_token": token,
                },
            )
        data = resp.json()
        if "error" in data:
            return {"available": False, "reason": data["error"].get("message", "API error")}
        metrics = {}
        for item in data.get("data", []):
            val = item.get("values", [{}])[0].get("value", 0) if item.get("values") else item.get("value", 0)
            metrics[item["name"]] = val
        return {"available": True, "media_id": media_id, "metrics": metrics}
    except Exception as e:
        return {"available": False, "reason": str(e)}


class SchedulePostBody(BaseModel):
    scheduled_at: datetime


@router.post("/{post_id}/schedule")
@router.put("/{post_id}/schedule")
async def schedule_post(post_id: int, body: SchedulePostBody):
    """Schedule or reschedule a post (POST = new schedule, PUT = drag-and-drop reschedule)."""
    async with AsyncSessionLocal() as session:
        post = await session.get(Post, post_id)
        if not post:
            raise HTTPException(status_code=404, detail="Post not found")
        if post.status == "published":
            raise HTTPException(status_code=400, detail="Post already published")
        scheduled_at = body.scheduled_at.replace(tzinfo=None)
        post.scheduled_at = scheduled_at
        post.approval_status = "approved"
        post.updated_at = datetime.utcnow()
        await session.commit()
    return {"message": "Post scheduled", "post_id": post_id, "scheduled_at": scheduled_at.isoformat()}


@router.post("/{post_id}/discard")
async def discard_post(post_id: int):
    """Discard a draft post — hard deletes it so it never gets published."""
    async with AsyncSessionLocal() as session:
        post = await session.get(Post, post_id)
        if not post:
            raise HTTPException(status_code=404, detail="Post not found")
        if post.status not in ("draft",):
            raise HTTPException(status_code=400, detail=f"Cannot discard a post with status '{post.status}'")
        await session.delete(post)
        await session.commit()
        return {"discarded": True, "post_id": post_id}


@router.delete("/{post_id}")
async def delete_post(post_id: int):
    """Hard delete a single post by ID."""
    async with AsyncSessionLocal() as session:
        post = await session.get(Post, post_id)
        if not post:
            raise HTTPException(status_code=404, detail="Post not found")
        await session.delete(post)
        await session.commit()
        return {"deleted": 1}


class GeneratePostBody(BaseModel):
    trend_id: Optional[int] = None  # if None, picks the top pending trend
    platform: str = "instagram"
    post_type: str = "image"


@router.post("/generate")
async def generate_post(body: GeneratePostBody):
    """Run the full generation pipeline for one trend without Temporal."""
    import asyncio
    from src.temporal_workflows.pipeline import (
        generate_post_content, generate_images,
        store_media_to_cdn, save_post_draft,
        GeneratePostInput, GenerateImagesInput, StoreMediaInput, SavePostDraftInput,
        TrendData,
    )

    # Pick trend
    async with AsyncSessionLocal() as session:
        if body.trend_id:
            trend_row = await session.get(Trend, body.trend_id)
            if not trend_row:
                raise HTTPException(status_code=404, detail="Trend not found")
        else:
            from sqlalchemy import func as sqlfunc
            from datetime import datetime as dt
            hours_old = sqlfunc.greatest(
                sqlfunc.extract("epoch", dt.utcnow() - Trend.created_at) / 3600.0,
                0.01
            )
            boosted = Trend.score / (1.0 + hours_old / 12.0)
            result = await session.execute(
                select(Trend)
                .where(Trend.status == "pending_generation")
                .order_by(boosted.desc())
                .limit(1)
            )
            trend_row = result.scalar_one_or_none()
            if not trend_row:
                raise HTTPException(status_code=404, detail="No pending trends available")

        trend_id = trend_row.id
        trend_data = TrendData(
            trend_id=trend_row.id,
            topic=trend_row.topic,
            source=trend_row.source,
            score=trend_row.score or 0.0,
            raw_data=trend_row.raw_data,
        )

    # ── Duplicate check: find semantically similar existing posts ──────────
    from src.services.embeddings import get_embedding, find_similar_posts
    trend_embedding = await get_embedding(trend_data.topic)
    duplicate_warning = None
    if trend_embedding:
        similar = await find_similar_posts(trend_embedding, threshold=0.88, limit=1)
        if similar:
            duplicate_warning = {
                "post_id": similar[0]["id"],
                "similarity": round(float(similar[0]["similarity"]) * 100),
                "content_preview": (similar[0]["content"] or "")[:80],
            }

    # ── Insert placeholder row immediately so the UI can track progress ──
    async with AsyncSessionLocal() as session:
        placeholder = Post(
            trend_id=trend_id,
            agent_version_id=1,
            content=f"Generating post about: {trend_data.topic}",
            post_type=body.post_type,
            platform=body.platform,
            status="generating",
            approval_status="pending",
            generation_error=None,
        )
        session.add(placeholder)
        await session.commit()
        await session.refresh(placeholder)
        placeholder_id = placeholder.id

    async def _run_pipeline():
        from src.agents.post_generator import set_post_step
        try:
            set_post_step(placeholder_id, "Analysing trend...")
            post_data = await generate_post_content(GeneratePostInput(trend=trend_data, agent_version_id=1, post_type=body.post_type, post_id=placeholder_id))

            set_post_step(placeholder_id, "Generating image(s)...")
            carousel_prompts = post_data.carousel_image_prompts if body.post_type == "carousel" else None
            img_count = len(carousel_prompts) if carousel_prompts else (6 if body.post_type == "carousel" else 1)
            images = await generate_images(GenerateImagesInput(
                topic=trend_data.topic,
                count=img_count,
                image_prompt=post_data.image_prompt,
                post_type=body.post_type,
                carousel_image_prompts=carousel_prompts,
                post_id=placeholder_id,
            ))
            set_post_step(placeholder_id, "Storing media...")
            cdn_images = await store_media_to_cdn(StoreMediaInput(images=images, post_id=placeholder_id))

            saved = await save_post_draft(SavePostDraftInput(
                post=post_data,
                trend_id=trend_id,
                agent_version_id=1,
                images=cdn_images,
                platform=body.platform,
                post_type=body.post_type,
                placeholder_id=placeholder_id,
                token_count=post_data.token_count,
                generation_cost=post_data.generation_cost,
                hallucination_score=post_data.hallucination_score,
            ))

            # Mark trend as used
            async with AsyncSessionLocal() as session:
                t = await session.get(Trend, trend_id)
                if t:
                    t.status = "generated"
                    t.used_for_post = True
                    await session.commit()

            set_post_step(placeholder_id, "Matching music to topic mood...")
            # Auto-attach music based on post content + trend topic
            await _auto_attach_music(placeholder_id, post_data.content, trend_data.topic)

            set_post_step(placeholder_id, "Scoring quality — hook, CTA, hashtags, brand fit...")
            # Compute quality score, auto-improve if weak
            try:
                from src.services.quality_scorer import score_post
                from src.services.post_improver import auto_improve
                from src.models.database import BrandVoice
                async with AsyncSessionLocal() as session:
                    brand = await session.execute(
                        select(BrandVoice).where(BrandVoice.is_active == True).limit(1)
                    )
                    brand_voice = brand.scalar_one_or_none()
                    initial = score_post(post_data.content, body.post_type, brand_voice, body.platform)
                    set_post_step(placeholder_id, f"Initial score: {initial['score']}/100 ({initial['grade']})")
                    logger.info(f"[Quality] Post {placeholder_id} initial score {initial['score']}/100 ({initial['grade']})")

                    final_content = post_data.content
                    final_result = initial
                    if initial["score"] < 70:
                        set_post_step(placeholder_id, f"Score {initial['score']}/100 — auto-improving...")
                        final_content, final_result = await auto_improve(post_data.content, body.post_type, brand_voice, post_id=placeholder_id)

                    post = await session.get(Post, placeholder_id)
                    if post:
                        post.content = final_content
                        post.quality_score = final_result["score"]
                        post.quality_breakdown = final_result["breakdown"]
                        await session.commit()
                        logger.info(f"[Quality] Post {placeholder_id} final score {final_result['score']}/100 ({final_result['grade']})")
            except Exception as qe:
                logger.warning(f"[Quality] Scoring failed for post {placeholder_id}: {qe}")

            logger.info(f"[Generate] Post {placeholder_id} generation complete")

            # Budget alert check
            try:
                from src.config import get_settings as _gs
                _budget = _gs().monthly_budget_usd
                if _budget and _budget > 0:
                    from datetime import datetime as _dt
                    _month = _dt.utcnow().strftime("%Y-%m")
                    async with AsyncSessionLocal() as _bs:
                        _spent = (await _bs.execute(
                            select(func.sum(Post.generation_cost))
                            .where(Post.generation_cost.isnot(None))
                            .where(func.to_char(Post.created_at, "YYYY-MM") == _month)
                        )).scalar() or 0.0
                        if _spent >= _budget:
                            _exists = (await _bs.execute(
                                select(Notification).where(
                                    Notification.type == "budget_exceeded",
                                ).order_by(Notification.created_at.desc()).limit(1)
                            )).scalar_one_or_none()
                            if not _exists:
                                _bs.add(Notification(
                                    type="budget_exceeded",
                                    title="Monthly budget exceeded",
                                    message=f"Generation cost this month: ${_spent:.4f} — over your ${_budget:.2f} limit.",
                                    is_read=False,
                                ))
                                await _bs.commit()
                                logger.warning(f"[Budget] Monthly spend ${_spent:.4f} exceeded limit ${_budget:.2f}")
            except Exception:
                pass

            # Clear step tracker so the UI stops showing "Scoring quality..."
            from src.agents.post_generator import _post_steps
            _post_steps.pop(placeholder_id, None)
            # Force WS push in case PG NOTIFY isn't reaching us (Neon pooled connections)
            from src.utils.notify import mark_dirty
            mark_dirty("posts_changed")

        except Exception as e:
            logger.error(f"[Generate] Pipeline failed for placeholder {placeholder_id}: {e}")
            async with AsyncSessionLocal() as session:
                post = await session.get(Post, placeholder_id)
                if post:
                    post.status = "failed"
                    post.content = f"Generation failed: {e}"
                    post.generation_error = str(e)
                    await _create_notification(
                        session,
                        "generation_failed",
                        f"Post #{placeholder_id} generation failed",
                        str(e),
                        {"post_id": placeholder_id, "trend_id": trend_id},
                    )
                    await session.commit()
            from src.agents.post_generator import _post_steps
            _post_steps.pop(placeholder_id, None)
            from src.utils.notify import mark_dirty
            mark_dirty("posts_changed")

    # Fire pipeline in background — return immediately with placeholder id
    task = asyncio.create_task(_run_pipeline())
    _generation_tasks[placeholder_id] = task
    task.add_done_callback(lambda _: _generation_tasks.pop(placeholder_id, None))

    return {
        "message": "Generation started",
        "post_id": placeholder_id,
        "trend_id": trend_id,
        "topic": trend_data.topic,
        "platform": body.platform,
        "duplicate_warning": duplicate_warning,
    }


@router.post("/{post_id}/cancel-generation")
async def cancel_generation(post_id: int):
    """Cancel an in-progress post generation and mark the post as discarded."""
    task = _generation_tasks.get(post_id)
    if task and not task.done():
        task.cancel()
    async with AsyncSessionLocal() as session:
        post = await session.get(Post, post_id)
        if not post:
            raise HTTPException(status_code=404, detail="Post not found")
        if post.status not in ("generating",):
            raise HTTPException(status_code=400, detail=f"Post is not generating (status: {post.status})")
        post.status = "failed"
        post.generation_error = "Cancelled by user"
        await session.commit()
    return {"post_id": post_id, "cancelled": True}


class ManualPostBody(BaseModel):
    content: str
    platform: str = "instagram"
    post_type: str = "text_only"
    image_url: Optional[str] = None
    link_url: Optional[str] = None
    link_title: Optional[str] = None
    link_description: Optional[str] = None


@router.post("/manual")
async def create_manual_post(body: ManualPostBody):
    """Create a post manually — no AI generation, saves directly as draft."""
    async with AsyncSessionLocal() as session:
        post = Post(
            content=body.content,
            platform=body.platform,
            post_type=body.post_type,
            image_url=body.image_url or None,
            link_url=body.link_url or None,
            link_title=body.link_title or None,
            link_description=body.link_description or None,
            status="draft",
            approval_status="pending",
        )
        session.add(post)
        await session.commit()
        await session.refresh(post)
        return _post_dict(post)


class MusicAttachBody(BaseModel):
    music_id: Optional[int] = None


@router.patch("/{post_id}/music")
async def attach_music(post_id: int, body: MusicAttachBody):
    """Attach or detach a music track from a post."""
    async with AsyncSessionLocal() as session:
        post = await session.get(Post, post_id)
        if not post:
            raise HTTPException(status_code=404, detail="Post not found")
        post.music_id = body.music_id
        post.updated_at = datetime.utcnow()
        await session.commit()
        return {"post_id": post_id, "music_id": body.music_id}


class BulkIdsBody(BaseModel):
    ids: List[int]


@router.post("/bulk-approve")
async def bulk_approve_posts(body: BulkIdsBody):
    """Queue multiple draft posts for immediate publish."""
    import asyncio
    async def _approve(post_id: int):
        async with AsyncSessionLocal() as session:
            post = await session.get(Post, post_id)
            if not post or post.status not in ("draft", "failed"):
                return {"post_id": post_id, "ok": False, "error": "Invalid status"}
        try:
            from src.services.scheduler import run_auto_publish
            await run_auto_publish(post_id)
            return {"post_id": post_id, "ok": True}
        except Exception as e:
            return {"post_id": post_id, "ok": False, "error": str(e)}
    results = await asyncio.gather(*[_approve(pid) for pid in body.ids])
    return {"results": list(results), "approved": sum(1 for r in results if r["ok"])}


class BulkScheduleBody(BaseModel):
    ids: List[int]
    scheduled_at: datetime


@router.post("/bulk-schedule")
async def bulk_schedule_posts(body: BulkScheduleBody):
    """Approve + schedule multiple draft posts for the same time slot."""
    if not body.ids:
        return {"scheduled": 0}
    scheduled_at = body.scheduled_at.replace(tzinfo=None)
    async with AsyncSessionLocal() as session:
        rows = await session.execute(select(Post).where(Post.id.in_(body.ids)))
        posts = rows.scalars().all()
        count = 0
        for p in posts:
            if p.status == "draft":
                p.approval_status = "approved"
                p.scheduled_at = scheduled_at
                count += 1
        await session.commit()
    return {"scheduled": count, "scheduled_at": scheduled_at.isoformat()}


@router.post("/bulk-reject")
async def bulk_reject_posts(body: BulkIdsBody):
    """Reject multiple draft posts."""
    if not body.ids:
        return {"rejected": 0}
    async with AsyncSessionLocal() as session:
        rows = await session.execute(select(Post).where(Post.id.in_(body.ids)))
        posts = rows.scalars().all()
        for p in posts:
            if p.status == "draft":
                p.approval_status = "rejected"
                p.status = "failed"
        await session.commit()
    return {"rejected": len(body.ids)}


@router.post("/bulk-delete")
async def bulk_delete_posts(body: BulkIdsBody):
    """Hard delete multiple posts by ID list."""
    if not body.ids:
        return {"deleted": 0}
    async with AsyncSessionLocal() as session:
        result = await session.execute(
            delete(Post).where(Post.id.in_(body.ids))
        )
        await session.commit()
        return {"deleted": result.rowcount}


# ── Extended Analytics ─────────────────────────────────────────────────────────

@router.get("/analytics/timeseries")
async def posts_timeseries(days: int = Query(30, ge=7, le=365)):
    """Daily post counts for the last N days — published + drafted."""
    cutoff = datetime.utcnow() - timedelta(days=days)
    async with AsyncSessionLocal() as session:
        rows = await session.execute(
            select(
                cast(Post.created_at, Date).label("day"),
                Post.status,
                func.count(Post.id).label("count"),
            )
            .where(Post.created_at >= cutoff)
            .group_by(cast(Post.created_at, Date), Post.status)
            .order_by(cast(Post.created_at, Date))
        )
        data: dict = {}
        for row in rows.all():
            day = str(row.day)
            if day not in data:
                data[day] = {"date": day, "published": 0, "draft": 0, "failed": 0}
            key = row.status if row.status in ("published", "draft", "failed") else "draft"
            data[day][key] += row.count
        return {"days": days, "series": list(data.values())}


@router.get("/analytics/by-type")
async def posts_by_type():
    """Breakdown of post counts by post_type."""
    async with AsyncSessionLocal() as session:
        rows = await session.execute(
            select(Post.post_type, func.count(Post.id).label("count"))
            .group_by(Post.post_type)
        )
        return [{"post_type": r.post_type or "image", "count": r.count} for r in rows.all()]


@router.get("/analytics/top-posts")
async def top_posts(limit: int = Query(5, ge=1, le=20)):
    """Most recently published posts — used for 'top content' panel."""
    async with AsyncSessionLocal() as session:
        rows = await session.execute(
            select(Post)
            .options(selectinload(Post.music_track))
            .where(Post.status == "published")
            .order_by(Post.published_at.desc())
            .limit(limit)
        )
        posts = rows.scalars().all()
        items = []
        for p in posts:
            trend_topic = None
            if p.trend_id:
                tr = await session.get(Trend, p.trend_id)
                trend_topic = tr.topic if tr else None
            items.append({**_post_dict(p, trend_topic), "char_count": len(p.content or "")})
        return {"items": items}


@router.get("/analytics/posting-hours")
async def posting_hours():
    """Hour-of-day breakdown of published posts (0–23) for heatmap."""
    async with AsyncSessionLocal() as session:
        rows = await session.execute(
            select(
                func.extract("hour", Post.published_at).label("hour"),
                func.count(Post.id).label("count"),
            )
            .where(Post.published_at.isnot(None))
            .group_by(func.extract("hour", Post.published_at))
            .order_by(func.extract("hour", Post.published_at))
        )
        hour_map = {int(r.hour): r.count for r in rows.all()}
        return [{"hour": h, "count": hour_map.get(h, 0)} for h in range(24)]


@router.get("/analytics/instagram-engagement")
async def instagram_engagement(limit: int = Query(default=20, le=50)):
    """Aggregate Instagram engagement metrics across recently published posts."""
    import httpx, os
    from src.config import get_settings as _gs2
    token = _gs2().instagram_access_token or os.getenv("INSTAGRAM_ACCESS_TOKEN", "")
    if not token:
        return {"available": False, "reason": "Instagram token not configured", "posts": [], "totals": {}}

    async with AsyncSessionLocal() as session:
        rows = await session.execute(
            select(Post.id, Post.content, Post.image_url, Post.platform_post_id, Post.published_at)
            .where(Post.status == "published", Post.platform_post_id.isnot(None), Post.platform == "instagram")
            .order_by(Post.published_at.desc())
            .limit(limit)
        )
        posts = rows.all()

    if not posts:
        return {"available": True, "posts": [], "totals": {"views": 0, "reach": 0, "likes": 0, "comments": 0, "saved": 0, "shares": 0, "total_interactions": 0}}

    async def _fetch(post_row):
        try:
            async with httpx.AsyncClient(timeout=8) as client:
                resp = await client.get(
                    f"https://graph.facebook.com/v22.0/{post_row.platform_post_id}/insights",
                    params={"metric": "reach,saved,likes,comments,shares,total_interactions,views", "access_token": token},
                )
            data = resp.json()
            if "error" in data:
                return None
            metrics = {}
            for item in data.get("data", []):
                val = item.get("values", [{}])[0].get("value", 0) if item.get("values") else item.get("value", 0)
                metrics[item["name"]] = val
            return {
                "post_id": post_row.id,
                "media_id": post_row.platform_post_id,
                "content_preview": (post_row.content or "")[:80],
                "image_url": post_row.image_url,
                "published_at": post_row.published_at.isoformat() if post_row.published_at else None,
                **metrics,
            }
        except Exception:
            return None

    import asyncio
    results = await asyncio.gather(*[_fetch(p) for p in posts])
    valid = [r for r in results if r]

    totals = {"views": 0, "reach": 0, "likes": 0, "comments": 0, "saved": 0, "shares": 0, "total_interactions": 0}
    for r in valid:
        for k in totals:
            totals[k] += r.get(k, 0)

    return {"available": True, "posts": valid, "totals": totals}


@router.get("/{post_id}/similar")
async def similar_posts(
    post_id: int,
    threshold: float = Query(0.80, ge=0.5, le=1.0),
    limit: int = Query(5, ge=1, le=20),
):
    """Find posts semantically similar to a given post."""
    async with AsyncSessionLocal() as session:
        post = await session.get(Post, post_id)
        if not post:
            raise HTTPException(status_code=404, detail="Post not found")
        if post.content_embedding is None:
            from src.services.embeddings import get_embedding
            emb = await get_embedding(post.content or "")
            if not emb:
                return {"items": [], "note": "No embedding available for this post"}
        else:
            emb = list(post.content_embedding)
    from src.services.embeddings import find_similar_posts
    items = await find_similar_posts(emb, threshold=threshold, limit=limit, exclude_id=post_id)
    return {"items": items}


@router.get("/{post_id}")
async def get_post(post_id: int):
    """Fetch a single post by ID — same shape as the list endpoint items."""
    async with AsyncSessionLocal() as session:
        result = await session.execute(
            select(Post).where(Post.id == post_id).options(selectinload(Post.music_track))
        )
        post = result.scalar_one_or_none()
        if not post:
            raise HTTPException(status_code=404, detail="Post not found")
        trend_topic = None
        if post.trend_id:
            t = await session.get(Trend, post.trend_id)
            trend_topic = t.topic if t else None
        return _post_dict(post, trend_topic, await _get_workflow_id(session, post.id))


_sched_status_cache: dict = {"ts": 0.0, "data": None}

@router.get("/analytics/scheduler-status")
async def scheduler_status():
    """Live scheduler info — cached for 30s to avoid repeated DB queries."""
    import time
    from src.services.scheduler import scheduler
    from src.config import get_settings

    now = time.monotonic()
    if _sched_status_cache["data"] and now - _sched_status_cache["ts"] < 30:
        return _sched_status_cache["data"]

    settings = get_settings()
    jobs = []
    for job in scheduler.get_jobs():
        next_run = job.next_run_time
        jobs.append({
            "id": job.id,
            "name": job.name,
            "next_run": next_run.isoformat() if next_run else None,
        })

    today_start = datetime.utcnow().replace(hour=0, minute=0, second=0, microsecond=0)
    async with AsyncSessionLocal() as session:
        today_count = (await session.execute(
            select(func.count(Post.id)).where(Post.created_at >= today_start)
        )).scalar()
        published_today = (await session.execute(
            select(func.count(Post.id))
            .where(Post.published_at >= today_start)
            .where(Post.status == "published")
        )).scalar()

    # Include currently-running jobs so UI can show a "scheduler busy" indicator
    try:
        from src.services.scheduler import get_running_jobs
        running_jobs = get_running_jobs()
    except Exception:
        running_jobs = {}

    result = {
        "scheduler_running": scheduler.running,
        "posts_per_day": settings.posts_per_day,
        "auto_approve": settings.auto_approve,
        "jobs": jobs,
        "today_generated": today_count,
        "today_published": published_today,
        "running_jobs": running_jobs,
        "is_busy": bool(running_jobs),
    }
    # Don't cache when busy — UI needs frequent updates
    if not running_jobs:
        _sched_status_cache["data"] = result
        _sched_status_cache["ts"] = now
    return result


class HashtagSuggestBody(BaseModel):
    content: str
    topic: str = ""


@router.post("/suggest-hashtags")
async def suggest_hashtags(body: HashtagSuggestBody):
    """Use LLM to suggest 8-10 relevant hashtags for a post."""
    from src.agents.post_generator import _build_attempts
    import httpx, json as _json

    prompt = (
        f"Generate 8-10 highly relevant Instagram hashtags for this post.\n"
        f"Topic: {body.topic}\n"
        f"Caption: {body.content[:400]}\n\n"
        f"Rules: Mix popular (#news) and niche (#dailywireup) tags. Each must start with #. "
        f"No spaces in tags. Output ONLY a JSON array of strings, e.g. [\"#tag1\",\"#tag2\"]. Nothing else."
    )

    attempts = await _build_attempts()
    for attempt in attempts[:3]:  # only try first 3 models
        if attempt.get("use_sdk"):
            continue
        try:
            base = (attempt["api_base"] or "").rstrip("/")
            if not base.startswith("http"):
                base = "https://" + base
            async with httpx.AsyncClient(timeout=10) as client:
                resp = await client.post(
                    f"{base}/chat/completions",
                    headers={"Authorization": f"Bearer {attempt['api_key']}", "Content-Type": "application/json"},
                    json={"model": attempt["model"], "messages": [{"role": "user", "content": prompt}],
                          "temperature": 0.7, "max_tokens": 200},
                )
                resp.raise_for_status()
                raw = resp.json()["choices"][0]["message"]["content"].strip()
                # Parse JSON array
                start, end = raw.find("["), raw.rfind("]")
                if start != -1 and end != -1:
                    tags = _json.loads(raw[start:end+1])
                    tags = [t if t.startswith("#") else f"#{t}" for t in tags if t.strip()]
                    return {"hashtags": tags[:10]}
        except Exception:
            continue
    return {"hashtags": []}