"""增量任务包中心 API。"""

from __future__ import annotations

from typing import Optional

from fastapi import APIRouter, Depends
from fastapi.responses import JSONResponse
from pydantic import BaseModel, Field
from sqlalchemy.ext.asyncio import AsyncSession

from ..core.response import error_response, success_response
from ..database import get_db
from ..dependencies import get_current_user
from ..models import User
from ..services.auth import has_any_role
from ..services.operation_log_service import log_operation
from ..services.task_brief_service import TaskBriefService

router = APIRouter(prefix="/task-briefs", tags=["task_briefs"])


class TemplateCreateRequest(BaseModel):
    name: str
    content: str
    description: Optional[str] = None


class TemplateUpdateRequest(BaseModel):
    name: Optional[str] = None
    content: Optional[str] = None
    description: Optional[str] = None


class GenerateTaskBriefRequest(BaseModel):
    title: str
    template_id: Optional[str] = None
    changed_files: list[str] = Field(default_factory=list)
    scope_summary: Optional[str] = None


def _require_manager(current_user: User) -> Optional[JSONResponse]:
    if has_any_role(str(current_user.role or ""), ["BOSS", "ADMIN"]):
        return None
    return JSONResponse(status_code=403, content=error_response(403, "仅管理员可执行该操作"))


@router.get("/center")
async def list_task_brief_center(
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    tenant_id = int(current_user.tenant_id)
    items = await TaskBriefService.list_center(db, tenant_id=tenant_id)
    return success_response({"items": items})


@router.get("/templates")
async def list_task_brief_templates(
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    tenant_id = int(current_user.tenant_id)
    items = await TaskBriefService.list_templates(db, tenant_id=tenant_id)
    return success_response({"items": items})


@router.post("/templates")
async def create_task_brief_template(
    body: TemplateCreateRequest,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    denied = _require_manager(current_user)
    if denied is not None:
        return denied
    tenant_id = int(current_user.tenant_id)
    item = await TaskBriefService.create_template(
        db,
        tenant_id=tenant_id,
        operator_user_id=int(current_user.id),
        name=body.name,
        content=body.content,
        description=body.description,
    )
    await log_operation(
        db,
        tenant_id=tenant_id,
        user_id=int(current_user.id),
        project_id=None,
        entity_type="task_brief_template",
        entity_id=str(item.get("id") or ""),
        action="create",
        before_data=None,
        after_data=item,
        remark="创建任务包模板",
    )
    await db.commit()
    return success_response(item)


@router.put("/templates/{template_id}")
async def update_task_brief_template(
    template_id: str,
    body: TemplateUpdateRequest,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    denied = _require_manager(current_user)
    if denied is not None:
        return denied
    tenant_id = int(current_user.tenant_id)
    before_items = await TaskBriefService.list_templates(db, tenant_id=tenant_id)
    before = next((item for item in before_items if str(item.get("id") or "") == str(template_id)), None)
    item = await TaskBriefService.update_template(
        db,
        tenant_id=tenant_id,
        operator_user_id=int(current_user.id),
        template_id=template_id,
        name=body.name,
        content=body.content,
        description=body.description,
    )
    if item is None:
        await db.rollback()
        return JSONResponse(status_code=404, content=error_response(404, "模板不存在"))
    await log_operation(
        db,
        tenant_id=tenant_id,
        user_id=int(current_user.id),
        project_id=None,
        entity_type="task_brief_template",
        entity_id=str(template_id),
        action="update",
        before_data=before,
        after_data=item,
        remark="更新任务包模板",
    )
    await db.commit()
    return success_response(item)


@router.get("/runs")
async def list_task_brief_runs(
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    tenant_id = int(current_user.tenant_id)
    items = await TaskBriefService.list_runs(db, tenant_id=tenant_id)
    return success_response({"items": items})


@router.post("/generate")
async def generate_task_brief(
    body: GenerateTaskBriefRequest,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    denied = _require_manager(current_user)
    if denied is not None:
        return denied
    tenant_id = int(current_user.tenant_id)
    result = await TaskBriefService.generate_brief(
        db,
        tenant_id=tenant_id,
        operator_user_id=int(current_user.id),
        title=body.title,
        template_id=body.template_id,
        changed_files=body.changed_files,
        scope_summary=body.scope_summary,
    )
    await log_operation(
        db,
        tenant_id=tenant_id,
        user_id=int(current_user.id),
        project_id=None,
        entity_type="task_brief_run",
        entity_id=str((result.get("run") or {}).get("id") or ""),
        action="generate",
        before_data=None,
        after_data=result,
        remark="生成增量任务包",
    )
    await db.commit()
    return success_response(result)


@router.get("/contract-sync")
async def get_task_brief_contract_sync(
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    tenant_id = int(current_user.tenant_id)
    data = await TaskBriefService.get_contract_sync_status(db, tenant_id=tenant_id)
    return success_response(data)