from __future__ import annotations

from enum import Enum
from typing import Literal

from fastapi import Depends, HTTPException, Query
from sqlalchemy import and_, select
from sqlalchemy.ext.asyncio import AsyncSession

from ...core.response import success_response
from ...dependencies.permissions import require_manager_user
from ...models import User, UserProject
from ...schemas.feedback_center import FeedbackCenterReviewRequest
from ...services.auth import parse_role_values
from ...services.feedback_center import FeedbackCenterService, list_reason_catalog
from .shared import *

MANAGER_ROLES = {"ADMIN", "BOSS"}


def _is_manager_user(current_user: User) -> bool:
    role_value = getattr(current_user, "role", "")
    if isinstance(role_value, Enum):
        role_value = role_value.value
    roles = set(parse_role_values(str(role_value or "")))
    return bool(roles.intersection(MANAGER_ROLES))


async def _ensure_summary_scope(
    *,
    current_user: User,
    db: AsyncSession,
    project_id: int | None,
) -> None:
    if _is_manager_user(current_user):
        return
    if project_id is None:
        raise HTTPException(status_code=403, detail="Manager permission required for global feedback center")
    membership = await db.execute(
        select(UserProject.id).where(
            and_(
                UserProject.tenant_id == int(current_user.tenant_id),
                UserProject.project_id == int(project_id),
                UserProject.user_id == int(current_user.id),
            )
        )
    )
    if membership.scalar_one_or_none() is None:
        raise HTTPException(status_code=403, detail="Project membership required")


@router.get("/feedback-center/summary")
async def get_feedback_center_summary(
    project_id: int | None = Query(default=None),
    window_days: int | None = Query(default=None),
    source_group: str | None = Query(default=None),
    current_user: User = Depends(get_current_user),
    db: AsyncSession = Depends(get_db),
    tenant_id: int = Depends(get_tenant_id),
):
    effective_tenant_id = int(getattr(current_user, "tenant_id", tenant_id) or tenant_id)
    await _ensure_summary_scope(current_user=current_user, db=db, project_id=project_id)
    try:
        data = await FeedbackCenterService(db).summary(
            tenant_id=effective_tenant_id,
            project_id=project_id,
            window_days=window_days,
            source_group=source_group,
        )
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc)) from exc
    return success_response(data)


@router.get("/feedback-center/items")
async def list_feedback_center_items(
    project_id: int | None = Query(default=None),
    source_type: str | None = Query(default=None),
    review_status: str | None = Query(default=None),
    field_name: str | None = Query(default=None),
    reason_code: str | None = Query(default=None),
    search: str | None = Query(default=None),
    limit: int = Query(default=20, ge=1, le=100),
    offset: int = Query(default=0, ge=0),
    current_user: User = Depends(require_manager_user),
    db: AsyncSession = Depends(get_db),
    tenant_id: int = Depends(get_tenant_id),
):
    effective_tenant_id = int(getattr(current_user, "tenant_id", tenant_id) or tenant_id)
    data = await FeedbackCenterService(db).list_records(
        tenant_id=effective_tenant_id,
        project_id=project_id,
        source_type=source_type,
        review_status=review_status,
        field_name=field_name,
        reason_code=reason_code,
        search=search,
        limit=limit,
        offset=offset,
    )
    return success_response(data)


@router.get("/feedback-center/items/{record_id}")
async def get_feedback_center_item_detail(
    record_id: int,
    project_id: int | None = Query(default=None),
    current_user: User = Depends(require_manager_user),
    db: AsyncSession = Depends(get_db),
    tenant_id: int = Depends(get_tenant_id),
):
    effective_tenant_id = int(getattr(current_user, "tenant_id", tenant_id) or tenant_id)
    data = await FeedbackCenterService(db).get_detail(
        tenant_id=effective_tenant_id,
        record_id=record_id,
        project_id=project_id,
    )
    if data is None:
        raise HTTPException(status_code=404, detail="feedback record not found")
    return success_response(data)


@router.post("/feedback-center/items/{record_id}/review")
async def review_feedback_center_item(
    record_id: int,
    request: FeedbackCenterReviewRequest,
    current_user: User = Depends(require_manager_user),
    db: AsyncSession = Depends(get_db),
    tenant_id: int = Depends(get_tenant_id),
):
    effective_tenant_id = int(getattr(current_user, "tenant_id", tenant_id) or tenant_id)
    service = FeedbackCenterService(db)
    reviewed = await service.review(
        tenant_id=effective_tenant_id,
        record_id=record_id,
        reviewer_id=int(current_user.id),
        review_status=request.review_status,
        reason_code=request.reason_code,
        reason_text=request.reason_text,
    )
    return success_response(reviewed)


@router.get("/feedback-center/reason-catalog")
async def get_feedback_center_reason_catalog(
    source_type: str | None = Query(default=None),
    field_name: str | None = Query(default=None),
    current_user: User = Depends(require_manager_user),
    db: AsyncSession = Depends(get_db),
    tenant_id: int = Depends(get_tenant_id),
):
    _ = db, tenant_id, current_user
    return success_response(
        {
            "items": list_reason_catalog(source_type=source_type, field_name=field_name),
        }
    )