"""Catalog API routes — query and manage generated images."""

from __future__ import annotations

from pathlib import Path

from fastapi import APIRouter, HTTPException
from fastapi.responses import FileResponse

from content_engine.models.schemas import ImageResponse

router = APIRouter(prefix="/api", tags=["catalog"])

_catalog = None


def init_routes(catalog):
    """Initialize route dependencies."""
    global _catalog
    _catalog = catalog


@router.get("/images", response_model=list[ImageResponse])
async def list_images(
    character_id: str | None = None,
    content_rating: str | None = None,
    template_id: str | None = None,
    is_approved: bool | None = None,
    is_published: bool | None = None,
    pose: str | None = None,
    outfit: str | None = None,
    emotion: str | None = None,
    limit: int = 50,
    offset: int = 0,
):
    """Search and list generated images with optional filters."""
    if _catalog is None:
        raise HTTPException(503, "Catalog not initialized")

    images = await _catalog.search(
        character_id=character_id,
        content_rating=content_rating,
        template_id=template_id,
        is_approved=is_approved,
        is_published=is_published,
        pose=pose,
        outfit=outfit,
        emotion=emotion,
        limit=limit,
        offset=offset,
    )

    return [
        ImageResponse(
            id=img.id,
            character_id=img.character_id,
            template_id=img.template_id,
            content_rating=img.content_rating,
            file_path=img.file_path,
            seed=img.seed,
            pose=img.pose,
            outfit=img.outfit,
            emotion=img.emotion,
            camera_angle=img.camera_angle,
            lighting=img.lighting,
            scene=img.scene,
            quality_score=img.quality_score,
            is_approved=img.is_approved,
            is_published=img.is_published,
            created_at=img.created_at,
        )
        for img in images
    ]


@router.get("/images/{image_id}", response_model=ImageResponse)
async def get_image(image_id: str):
    """Get a single image by ID."""
    if _catalog is None:
        raise HTTPException(503, "Catalog not initialized")

    img = await _catalog.get_image(image_id)
    if img is None:
        raise HTTPException(404, f"Image not found: {image_id}")

    return ImageResponse(
        id=img.id,
        character_id=img.character_id,
        template_id=img.template_id,
        content_rating=img.content_rating,
        file_path=img.file_path,
        seed=img.seed,
        pose=img.pose,
        outfit=img.outfit,
        emotion=img.emotion,
        camera_angle=img.camera_angle,
        lighting=img.lighting,
        scene=img.scene,
        quality_score=img.quality_score,
        is_approved=img.is_approved,
        is_published=img.is_published,
        created_at=img.created_at,
    )


@router.get("/images/{image_id}/file")
async def serve_image_file(image_id: str):
    """Serve the actual image file for display in the UI."""
    if _catalog is None:
        raise HTTPException(503, "Catalog not initialized")

    img = await _catalog.get_image(image_id)
    if img is None:
        raise HTTPException(404, f"Image not found: {image_id}")

    file_path = Path(img.file_path)
    if not file_path.exists():
        raise HTTPException(404, f"Image file not found on disk")

    ext = file_path.suffix.lower()
    media_type = "video/mp4" if ext == ".mp4" else "video/webm" if ext == ".webm" else "image/png"
    return FileResponse(
        file_path,
        media_type=media_type,
        headers={"Cache-Control": "public, max-age=3600"},
    )


@router.get("/images/{image_id}/download")
async def download_image_file(image_id: str):
    """Download the image file as an attachment."""
    if _catalog is None:
        raise HTTPException(503, "Catalog not initialized")

    img = await _catalog.get_image(image_id)
    if img is None:
        raise HTTPException(404, f"Image not found: {image_id}")

    file_path = Path(img.file_path)
    if not file_path.exists():
        raise HTTPException(404, "Image file not found on disk")

    return FileResponse(
        file_path,
        media_type="image/png",
        filename=file_path.name,
    )


@router.post("/images/{image_id}/approve")
async def approve_image(image_id: str):
    """Mark an image as approved for publishing."""
    if _catalog is None:
        raise HTTPException(503, "Catalog not initialized")

    success = await _catalog.approve_image(image_id)
    if not success:
        raise HTTPException(404, f"Image not found: {image_id}")
    return {"status": "approved", "image_id": image_id}


@router.delete("/images/{image_id}")
async def delete_image(image_id: str):
    """Delete an image from the catalog and disk."""
    if _catalog is None:
        raise HTTPException(503, "Catalog not initialized")

    success = await _catalog.delete_image(image_id)
    if not success:
        raise HTTPException(404, f"Image not found: {image_id}")
    return {"status": "deleted", "image_id": image_id}