from __future__ import annotations

from datetime import datetime
from typing import Annotated

from fastapi import APIRouter, Header, HTTPException, Query, Request, Response, status

from app.social.schemas.accounts import (
    SocialAccountConnectRequest,
    SocialAccountSelectionRequest,
    SocialAccountView,
    SocialConnectResponse,
    SocialProviderView,
    SocialPublishOptionsView,
)
from app.social.schemas.assets import (
    SocialMediaAssetRegister,
    SocialMediaAssetView,
)
from app.social.schemas.jobs import SocialJobView
from app.social.schemas.operations import (
    PublishingBatchView,
    PublishingBulkRequest,
    PublishingCalendarView,
    PublishingContextView,
    PublishingQueueView,
)
from app.social.schemas.posts import (
    SocialPostCreate,
    SocialPostDuplicateRequest,
    SocialPostPatch,
    SocialPostValidation,
    SocialPostView,
)
from app.social.schemas.scheduling import (
    SocialRescheduleRequest,
    SocialScheduleCreate,
    SocialScheduleView,
)

router = APIRouter(prefix="/v1/social", tags=["social automation"])


def _social(request: Request):
    service = request.app.state.container.social
    service.ensure_ready()
    return service


def _identity(request: Request) -> tuple[str, str]:
    context = request.state.auth
    if not context.workspace_id or not context.user_id:
        # Tenant resolution is performed by APIKeyService after credential
        # verification. Never fall back to treating an API-key ID as a tenant.
        raise HTTPException(status_code=403, detail="No active workspace membership.")
    return context.workspace_id, context.user_id


async def _audit(
    request: Request,
    event_type: str,
    *,
    provider: str | None = None,
    account_id: str | None = None,
    post_id: str | None = None,
    job_id: str | None = None,
) -> None:
    workspace_id, _ = _identity(request)
    await request.app.state.container.social.audit.record(
        workspace_id=workspace_id,
        event_type=event_type,
        api_key_id=request.state.auth.api_key_id,
        request_id=request.state.request_id,
        provider=provider,
        social_account_id=account_id,
        social_post_id=post_id,
        social_job_id=job_id,
    )


@router.get("/providers", response_model=list[SocialProviderView])
async def list_providers(request: Request) -> list[SocialProviderView]:
    return request.app.state.container.social.accounts.list_providers()


@router.get("/providers/{provider}/capabilities", response_model=SocialProviderView)
async def provider_capabilities(request: Request, provider: str) -> SocialProviderView:
    return request.app.state.container.social.accounts.get_provider(provider)


@router.get("/assets", response_model=list[SocialMediaAssetView])
async def list_social_media_assets(
    request: Request,
    offset: int = Query(default=0, ge=0),
    limit: int = Query(default=100, ge=1, le=500),
) -> list[SocialMediaAssetView]:
    workspace_id, _ = _identity(request)
    return await _social(request).media_assets.list(workspace_id, offset=offset, limit=limit)


@router.post("/assets", response_model=SocialMediaAssetView, status_code=status.HTTP_201_CREATED)
async def register_social_media_asset(
    request: Request, payload: SocialMediaAssetRegister
) -> SocialMediaAssetView:
    workspace_id, _ = _identity(request)
    return await _social(request).media_assets.register(workspace_id, payload)


@router.get("/accounts", response_model=list[SocialAccountView])
async def list_accounts(
    request: Request,
    offset: int = Query(default=0, ge=0),
    limit: int = Query(default=100, ge=1, le=500),
) -> list[SocialAccountView]:
    workspace_id, _ = _identity(request)
    return await _social(request).accounts.list(workspace_id, offset=offset, limit=limit)


@router.post("/accounts/select", response_model=list[SocialAccountView])
async def select_discovered_accounts(
    request: Request, payload: SocialAccountSelectionRequest
) -> list[SocialAccountView]:
    workspace_id, _ = _identity(request)
    selected = await _social(request).accounts.select_discovered(workspace_id, payload.account_ids)
    for account in selected:
        await _audit(
            request,
            "SOCIAL_ACCOUNT_CONNECTED",
            provider=account.provider.value,
            account_id=account.id,
        )
    return selected


@router.get("/accounts/{account_id}", response_model=SocialAccountView)
async def get_account(request: Request, account_id: str) -> SocialAccountView:
    workspace_id, _ = _identity(request)
    return await _social(request).accounts.get(workspace_id, account_id)


@router.get(
    "/accounts/{account_id}/publish-options",
    response_model=SocialPublishOptionsView,
)
async def get_account_publish_options(
    request: Request, account_id: str
) -> SocialPublishOptionsView:
    workspace_id, _ = _identity(request)
    return await _social(request).publishing.publish_options(workspace_id, account_id)


@router.post("/accounts/{provider}/connect", response_model=SocialConnectResponse)
async def connect_account(
    request: Request, provider: str, payload: SocialAccountConnectRequest
) -> SocialConnectResponse:
    workspace_id, user_id = _identity(request)
    result = await _social(request).oauth.connect(
        provider=provider,
        workspace_id=workspace_id,
        user_id=user_id,
        payload=payload,
    )
    await _audit(request, "SOCIAL_ACCOUNT_CONNECTION_STARTED", provider=provider)
    return result


@router.get(
    "/accounts/{provider}/callback",
    response_model=SocialAccountView,
    include_in_schema=True,
)
async def oauth_callback(
    request: Request,
    provider: str,
    state: Annotated[str, Query(min_length=32, max_length=255, pattern=r"^[A-Za-z0-9_-]+$")],
    code: Annotated[str | None, Query(min_length=1, max_length=4096)] = None,
    error: Annotated[str | None, Query(max_length=128)] = None,
) -> SocialAccountView:
    # This provider-facing route is authenticated by a short-lived, single-use
    # state record. Tenant/user identifiers are never accepted from the query.
    social = request.app.state.container.social
    social.ensure_ready()
    if error or not code:
        await social.oauth.callback_denied(provider=provider, state=state)
        raise AssertionError("OAuth callback denial should raise a social error")
    return await social.oauth.callback(provider=provider, state=state, code=code)


@router.post("/accounts/{account_id}/refresh", response_model=SocialAccountView)
async def refresh_account(request: Request, account_id: str) -> SocialAccountView:
    workspace_id, _ = _identity(request)
    result = await _social(request).oauth.refresh(workspace_id=workspace_id, account_id=account_id)
    await _audit(request, "SOCIAL_ACCOUNT_REAUTHORIZED", account_id=account_id)
    return result


@router.delete("/accounts/{account_id}", status_code=status.HTTP_204_NO_CONTENT)
async def disconnect_account(request: Request, account_id: str) -> Response:
    workspace_id, _ = _identity(request)
    account = await _social(request).accounts.get(workspace_id, account_id)
    await request.app.state.container.social.accounts.disconnect(workspace_id, account_id)
    await _audit(
        request,
        "SOCIAL_ACCOUNT_DISCONNECTED",
        provider=account.provider.value,
        account_id=account_id,
    )
    return Response(status_code=status.HTTP_204_NO_CONTENT)


@router.post("/posts", response_model=SocialPostView, status_code=status.HTTP_201_CREATED)
async def create_post(
    request: Request,
    payload: SocialPostCreate,
    idempotency_key: str | None = Header(
        default=None, alias="Idempotency-Key", min_length=8, max_length=255
    ),
) -> SocialPostView:
    workspace_id, user_id = _identity(request)
    result = await _social(request).publishing.create(
        workspace_id=workspace_id,
        user_id=user_id,
        payload=payload,
        idempotency_key=idempotency_key,
    )
    await _audit(request, "SOCIAL_POST_CREATED", post_id=result.id)
    if result.publish_mode.value == "draft":
        await _audit(request, "publishing.draft_created", post_id=result.id)
    return result


@router.get("/posts", response_model=list[SocialPostView])
async def list_posts(
    request: Request,
    offset: int = Query(default=0, ge=0),
    limit: int = Query(default=100, ge=1, le=500),
    post_status: str | None = Query(default=None, alias="status", max_length=32),
    project_id: str | None = Query(default=None, max_length=36),
    search: str | None = Query(default=None, max_length=200),
) -> list[SocialPostView]:
    workspace_id, _ = _identity(request)
    return await _social(request).publishing.list(
        workspace_id,
        offset=offset,
        limit=limit,
        status=post_status,
        project_id=project_id,
        search=search,
    )


@router.get("/posts/{post_id}", response_model=SocialPostView)
async def get_post(request: Request, post_id: str) -> SocialPostView:
    workspace_id, _ = _identity(request)
    return await _social(request).publishing.get(workspace_id, post_id)


@router.patch("/posts/{post_id}", response_model=SocialPostView)
async def update_post(request: Request, post_id: str, payload: SocialPostPatch) -> SocialPostView:
    workspace_id, _ = _identity(request)
    result = await _social(request).operations.update_draft(workspace_id, post_id, payload)
    await _audit(request, "publishing.draft_updated", post_id=post_id)
    return result


@router.get("/drafts", response_model=list[SocialPostView])
async def list_drafts(
    request: Request,
    offset: int = Query(default=0, ge=0),
    limit: int = Query(default=100, ge=1, le=500),
    search: str | None = Query(default=None, max_length=200),
) -> list[SocialPostView]:
    workspace_id, _ = _identity(request)
    posts = await _social(request).publishing.list(
        workspace_id,
        offset=offset,
        limit=limit,
        search=search,
    )
    return [
        post
        for post in posts
        if post.status.value in {"draft", "ready", "failed"} and post.publish_mode.value == "draft"
    ]


@router.patch("/drafts/{post_id}", response_model=SocialPostView)
async def update_draft(request: Request, post_id: str, payload: SocialPostPatch) -> SocialPostView:
    return await update_post(request, post_id, payload)


@router.delete("/drafts/{post_id}", status_code=status.HTTP_204_NO_CONTENT)
async def delete_draft(request: Request, post_id: str) -> Response:
    workspace_id, _ = _identity(request)
    await _social(request).operations.delete_draft(workspace_id, post_id)
    await _audit(request, "publishing.draft_deleted", post_id=post_id)
    return Response(status_code=status.HTTP_204_NO_CONTENT)


@router.post("/posts/{post_id}/duplicate", response_model=SocialPostView)
async def duplicate_post(
    request: Request,
    post_id: str,
    payload: SocialPostDuplicateRequest,
    idempotency_key: str = Header(alias="Idempotency-Key", min_length=8, max_length=255),
) -> SocialPostView:
    workspace_id, user_id = _identity(request)
    result = await _social(request).operations.duplicate(
        workspace_id,
        user_id,
        post_id,
        payload,
        idempotency_key=idempotency_key,
    )
    await _audit(request, "publishing.duplicated", post_id=result.id)
    return result


@router.post("/posts/{post_id}/validate", response_model=SocialPostValidation)
async def validate_post(request: Request, post_id: str) -> SocialPostValidation:
    workspace_id, _ = _identity(request)
    result = await _social(request).publishing.validate_post_targets(workspace_id, post_id)
    await _audit(request, "SOCIAL_POST_VALIDATED", post_id=post_id)
    await _audit(request, "publishing.validated", post_id=post_id)
    return result


@router.delete("/posts/{post_id}", status_code=status.HTTP_204_NO_CONTENT)
async def delete_post(request: Request, post_id: str) -> Response:
    workspace_id, _ = _identity(request)
    await _social(request).publishing.delete(workspace_id, post_id)
    await _audit(request, "SOCIAL_POST_DELETED", post_id=post_id)
    return Response(status_code=status.HTTP_204_NO_CONTENT)


@router.post(
    "/posts/{post_id}/publish",
    response_model=list[SocialJobView],
    status_code=status.HTTP_202_ACCEPTED,
)
async def publish_post(
    request: Request,
    post_id: str,
    idempotency_key: str = Header(alias="Idempotency-Key", min_length=8, max_length=255),
) -> list[SocialJobView]:
    workspace_id, _ = _identity(request)
    jobs = await _social(request).publishing.queue(
        workspace_id, post_id, idempotency_key=idempotency_key
    )
    await _audit(request, "SOCIAL_POST_PUBLISH_STARTED", post_id=post_id)
    return jobs


@router.post("/posts/{post_id}/schedule", response_model=SocialScheduleView)
async def schedule_post(
    request: Request, post_id: str, payload: SocialScheduleCreate
) -> SocialScheduleView:
    workspace_id, _ = _identity(request)
    validation = await _social(request).publishing.validate_post_targets(workspace_id, post_id)
    if not validation.valid:
        raise HTTPException(
            status_code=422,
            detail=validation.model_dump(mode="json"),
        )
    schedule = await _social(request).scheduling.schedule(workspace_id, post_id, payload)
    await _audit(request, "SOCIAL_SCHEDULE_CREATED", post_id=post_id)
    await _audit(request, "SOCIAL_POST_SCHEDULED", post_id=post_id)
    await _audit(request, "publishing.scheduled", post_id=post_id)
    return schedule


@router.post("/posts/{post_id}/reschedule", response_model=SocialScheduleView)
async def reschedule_post(
    request: Request, post_id: str, payload: SocialRescheduleRequest
) -> SocialScheduleView:
    workspace_id, _ = _identity(request)
    result = await _social(request).operations.reschedule(workspace_id, post_id, payload)
    await _audit(request, "publishing.rescheduled", post_id=post_id)
    return result


@router.post("/posts/{post_id}/cancel", response_model=SocialPostView)
async def cancel_post(request: Request, post_id: str) -> SocialPostView:
    workspace_id, _ = _identity(request)
    result = await _social(request).publishing.cancel(workspace_id, post_id)
    await _audit(request, "SOCIAL_POST_CANCELLED", post_id=post_id)
    await _audit(request, "publishing.cancelled", post_id=post_id)
    return result


@router.get("/calendar", response_model=PublishingCalendarView)
async def publishing_calendar(
    request: Request,
    starts_at: datetime = Query(),
    ends_at: datetime = Query(),
    offset: int = Query(default=0, ge=0),
    limit: int = Query(default=100, ge=1, le=500),
) -> PublishingCalendarView:
    workspace_id, _ = _identity(request)
    return await _social(request).operations.calendar(
        workspace_id,
        starts_at=starts_at,
        ends_at=ends_at,
        offset=offset,
        limit=limit,
    )


@router.get("/publishing-context", response_model=PublishingContextView)
async def publishing_context(request: Request) -> PublishingContextView:
    workspace_id, _ = _identity(request)
    return PublishingContextView(
        timezone=await _social(request).operations.workspace_timezone(workspace_id)
    )


@router.get("/queue", response_model=PublishingQueueView)
async def publishing_queue(
    request: Request,
    offset: int = Query(default=0, ge=0),
    limit: int = Query(default=50, ge=1, le=200),
    queue_status: str | None = Query(default=None, alias="status", max_length=32),
    provider: str | None = Query(default=None, max_length=32),
    account_id: str | None = Query(default=None, max_length=120),
    project_id: str | None = Query(default=None, max_length=36),
    search: str | None = Query(default=None, max_length=200),
) -> PublishingQueueView:
    workspace_id, _ = _identity(request)
    return await _social(request).operations.queue(
        workspace_id,
        offset=offset,
        limit=limit,
        status=queue_status,
        provider=provider,
        account_id=account_id,
        project_id=project_id,
        search=search,
    )


@router.post(
    "/bulk",
    response_model=PublishingBatchView,
    status_code=status.HTTP_202_ACCEPTED,
)
async def create_publishing_batch(
    request: Request,
    payload: PublishingBulkRequest,
    idempotency_key: str = Header(alias="Idempotency-Key", min_length=8, max_length=255),
) -> PublishingBatchView:
    workspace_id, user_id = _identity(request)
    result = await _social(request).operations.create_batch(
        workspace_id,
        user_id,
        payload,
        idempotency_key=idempotency_key,
    )
    await _audit(request, "publishing.bulk_started")
    return result


@router.post(
    "/posts/{post_id}/targets/{target_id}/retry",
    response_model=SocialJobView,
    status_code=status.HTTP_202_ACCEPTED,
)
async def retry_post_target(
    request: Request,
    post_id: str,
    target_id: str,
    idempotency_key: str = Header(alias="Idempotency-Key", min_length=8, max_length=255),
) -> SocialJobView:
    workspace_id, _ = _identity(request)
    result = await _social(request).publishing.retry_target(
        workspace_id,
        post_id,
        target_id,
        idempotency_key=idempotency_key,
    )
    await _audit(
        request,
        "SOCIAL_TARGET_RETRY_QUEUED",
        provider=result.provider.value if result.provider else None,
        post_id=post_id,
        job_id=result.id,
    )
    return result


@router.get("/jobs", response_model=list[SocialJobView])
async def list_jobs(
    request: Request,
    offset: int = Query(default=0, ge=0),
    limit: int = Query(default=100, ge=1, le=500),
) -> list[SocialJobView]:
    workspace_id, _ = _identity(request)
    return await _social(request).jobs.list(workspace_id, offset=offset, limit=limit)


@router.get("/jobs/{job_id}", response_model=SocialJobView)
async def get_job(request: Request, job_id: str) -> SocialJobView:
    workspace_id, _ = _identity(request)
    return await _social(request).jobs.get(workspace_id, job_id)


@router.get("/accounts/{account_id}/analytics")
async def account_analytics(request: Request, account_id: str) -> dict[str, object]:
    workspace_id, _ = _identity(request)
    return await _social(request).analytics.account(workspace_id, account_id)


@router.get("/posts/{post_id}/analytics")
async def post_analytics(request: Request, post_id: str) -> dict[str, object]:
    workspace_id, _ = _identity(request)
    return await _social(request).analytics.post(workspace_id, post_id)