"""社区域路由（WP-11）。"""

from typing import Annotated, Any

from fastapi import APIRouter, Depends, Request, status

from app.auth.dependencies import get_current_user, require_state_change
from app.community import service
from app.conversations.routes import _domain_of
from app.db.session import DbSession
from app.models import User

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


def _content_out(c: Any, counts: dict[str, int] | None = None) -> dict[str, Any]:
    out: dict[str, Any] = {
        "id": c.id,
        "kind": c.kind,
        "title": c.title,
        "body": c.body,
        "visibility": c.visibility,
        "status": c.status,
        "author_domain_id": c.author_domain_id,
        "created_at": c.created_at.isoformat(),
    }
    if counts is not None:
        out["reactions"] = counts
    return out


def _comment_out(c: Any) -> dict[str, Any]:
    return {
        "id": c.id,
        "content_id": c.content_id,
        "parent_comment_id": c.parent_comment_id,
        "body": c.body,
        "author_domain_id": c.author_domain_id,
        "created_at": c.created_at.isoformat(),
    }


@router.post("/contents", status_code=201)
async def publish(
    db: DbSession,
    user: Annotated[User, Depends(require_state_change)],
    request: Request,
    body: dict[str, Any],
) -> dict[str, Any]:
    domain = await _domain_of(db, user)
    content = await service.create_content(
        db, domain.id, body, getattr(request.state, "trace_id", None)
    )
    return _content_out(content)


@router.get("/contents")
async def list_contents(
    db: DbSession,
    user: Annotated[User, Depends(get_current_user)],
    limit: int = 20,
    cursor: str | None = None,
) -> dict[str, Any]:
    if not 1 <= limit <= 100:
        from fastapi import HTTPException

        raise HTTPException(status.HTTP_422_UNPROCESSABLE_ENTITY, "limit 取值范围 1-100")
    page, next_cursor, has_more = await service.list_public(db, limit, cursor)
    return {
        "data": [_content_out(c) for c in page],
        "next_cursor": next_cursor,
        "has_more": has_more,
    }


@router.get("/contents/{content_id}")
async def get_content(
    content_id: str,
    db: DbSession,
    user: Annotated[User, Depends(get_current_user)],
) -> dict[str, Any]:
    content = await service.require_content(db, content_id)
    counts = await service.reaction_counts(db, content_id)
    return _content_out(content, counts)


@router.post("/contents/{content_id}/comments", status_code=201)
async def comment(
    content_id: str,
    db: DbSession,
    user: Annotated[User, Depends(require_state_change)],
    request: Request,
    body: dict[str, str],
) -> dict[str, Any]:
    domain = await _domain_of(db, user)
    created = await service.add_comment(
        db, domain.id, content_id, body.get("body", ""), body.get("parent_comment_id"),
        getattr(request.state, "trace_id", None),
    )
    return _comment_out(created)


@router.get("/contents/{content_id}/comments")
async def list_comments(
    content_id: str,
    db: DbSession,
    user: Annotated[User, Depends(get_current_user)],
) -> dict[str, Any]:
    rows = await service.list_comments(db, content_id)
    return {"data": [_comment_out(c) for c in rows]}


@router.post("/contents/{content_id}/reactions", status_code=201)
async def react(
    content_id: str,
    db: DbSession,
    user: Annotated[User, Depends(require_state_change)],
    body: dict[str, str],
) -> dict[str, str]:
    domain = await _domain_of(db, user)
    kind = body.get("kind", "")
    if kind not in {"like", "save"}:
        from fastapi import HTTPException

        raise HTTPException(status.HTTP_422_UNPROCESSABLE_ENTITY, "kind 取值不合法")
    await service.react(db, domain.id, content_id, kind, None)
    counts = await service.reaction_counts(db, content_id)
    return {k: str(v) for k, v in counts.items()}


@router.delete("/contents/{content_id}/reactions", status_code=204)
async def unreact(
    content_id: str,
    db: DbSession,
    user: Annotated[User, Depends(require_state_change)],
    body: dict[str, str],
) -> None:
    domain = await _domain_of(db, user)
    await service.unreact(db, domain.id, content_id, body.get("kind", ""))


@router.post("/follows", status_code=201)
async def follow(
    db: DbSession,
    user: Annotated[User, Depends(require_state_change)],
    body: dict[str, str],
) -> dict[str, Any]:
    domain = await _domain_of(db, user)
    from app.models import PersonalDomain

    target = await db.get(PersonalDomain, body.get("followee_domain_id", ""))
    if target is None:
        from fastapi import HTTPException

        raise HTTPException(status.HTTP_404_NOT_FOUND, "用户不存在")
    await service.follow(db, domain.id, target.id)
    return await service.follow_counts(db, domain.id)


@router.get("/follows/counts")
async def follow_counts(
    db: DbSession, user: Annotated[User, Depends(get_current_user)]
) -> dict[str, Any]:
    domain = await _domain_of(db, user)
    return await service.follow_counts(db, domain.id)


@router.post("/reports", status_code=201)
async def report(
    db: DbSession,
    user: Annotated[User, Depends(require_state_change)],
    request: Request,
    body: dict[str, str],
) -> dict[str, Any]:
    domain = await _domain_of(db, user)
    report_row, case = await service.file_report(
        db, domain.id, body.get("target_type", ""), body.get("target_id", ""),
        body.get("reason", ""), getattr(request.state, "trace_id", None),
    )
    return {"report_id": report_row.id, "case_id": case.id, "status": case.status}


@router.post("/contents/{content_id}/withdrawals", status_code=200)
async def withdraw(
    content_id: str,
    db: DbSession,
    user: Annotated[User, Depends(require_state_change)],
    request: Request,
) -> dict[str, Any]:
    domain = await _domain_of(db, user)
    content = await service.withdraw_content(
        db, domain.id, content_id, getattr(request.state, "trace_id", None)
    )
    return _content_out(content)