"""成本管理路由"""
from fastapi import APIRouter, Depends, HTTPException, Query
from sqlalchemy.orm import Session
from typing import List, Optional
from datetime import date
from database import get_db
from models import (
    User, UserRole, AIToolCost, AIToolCostAllocation, OutsourceCost,
    CostOverride, SubscriptionPeriod, CostAllocationType, OutsourceType
)
from schemas import (
    AIToolCostCreate, AIToolCostOut, OutsourceCostCreate, OutsourceCostOut,
    CostOverrideCreate
)
from auth import get_current_user, require_role

router = APIRouter(prefix="/api/costs", tags=["成本管理"])


# ──────────────────── AI 工具成本 ────────────────────

@router.get("/ai-tools", response_model=List[AIToolCostOut])
def list_ai_tool_costs(
    db: Session = Depends(get_db),
    current_user: User = Depends(require_role(UserRole.OWNER, UserRole.SUPERVISOR, UserRole.LEADER))
):
    costs = db.query(AIToolCost).order_by(AIToolCost.record_date.desc()).all()
    return [
        AIToolCostOut(
            id=c.id, tool_name=c.tool_name,
            subscription_period=c.subscription_period.value if hasattr(c.subscription_period, 'value') else c.subscription_period,
            amount=c.amount,
            allocation_type=c.allocation_type.value if hasattr(c.allocation_type, 'value') else c.allocation_type,
            project_id=c.project_id,
            recorded_by=c.recorded_by,
            record_date=c.record_date,
            created_at=c.created_at,
        )
        for c in costs
    ]


@router.post("/ai-tools", response_model=AIToolCostOut)
def create_ai_tool_cost(
    req: AIToolCostCreate,
    db: Session = Depends(get_db),
    current_user: User = Depends(require_role(UserRole.OWNER, UserRole.SUPERVISOR, UserRole.LEADER))
):
    cost = AIToolCost(
        tool_name=req.tool_name,
        subscription_period=SubscriptionPeriod(req.subscription_period),
        amount=req.amount,
        allocation_type=CostAllocationType(req.allocation_type),
        project_id=req.project_id,
        recorded_by=current_user.id,
        record_date=req.record_date,
    )
    db.add(cost)
    db.flush()

    # 处理手动分摊
    if req.allocation_type == "手动分摊" and req.allocations:
        for alloc in req.allocations:
            db.add(AIToolCostAllocation(
                ai_tool_cost_id=cost.id,
                project_id=alloc["project_id"],
                percentage=alloc["percentage"],
            ))
    db.commit()
    db.refresh(cost)
    return AIToolCostOut(
        id=cost.id, tool_name=cost.tool_name,
        subscription_period=cost.subscription_period.value,
        amount=cost.amount,
        allocation_type=cost.allocation_type.value,
        project_id=cost.project_id,
        recorded_by=cost.recorded_by,
        record_date=cost.record_date,
        created_at=cost.created_at,
    )


@router.delete("/ai-tools/{cost_id}")
def delete_ai_tool_cost(
    cost_id: int,
    db: Session = Depends(get_db),
    current_user: User = Depends(require_role(UserRole.OWNER))
):
    cost = db.query(AIToolCost).filter(AIToolCost.id == cost_id).first()
    if not cost:
        raise HTTPException(status_code=404, detail="记录不存在")
    db.query(AIToolCostAllocation).filter(AIToolCostAllocation.ai_tool_cost_id == cost_id).delete()
    db.delete(cost)
    db.commit()
    return {"message": "已删除"}


# ──────────────────── 外包成本 ────────────────────

@router.get("/outsource", response_model=List[OutsourceCostOut])
def list_outsource_costs(
    project_id: Optional[int] = Query(None),
    db: Session = Depends(get_db),
    current_user: User = Depends(require_role(UserRole.OWNER, UserRole.SUPERVISOR, UserRole.LEADER))
):
    q = db.query(OutsourceCost)
    if project_id:
        q = q.filter(OutsourceCost.project_id == project_id)
    costs = q.order_by(OutsourceCost.record_date.desc()).all()
    return [
        OutsourceCostOut(
            id=c.id, project_id=c.project_id,
            outsource_type=c.outsource_type.value if hasattr(c.outsource_type, 'value') else c.outsource_type,
            episode_start=c.episode_start, episode_end=c.episode_end,
            amount=c.amount, recorded_by=c.recorded_by,
            record_date=c.record_date, created_at=c.created_at,
        )
        for c in costs
    ]


@router.post("/outsource", response_model=OutsourceCostOut)
def create_outsource_cost(
    req: OutsourceCostCreate,
    db: Session = Depends(get_db),
    current_user: User = Depends(require_role(UserRole.OWNER, UserRole.SUPERVISOR, UserRole.LEADER))
):
    cost = OutsourceCost(
        project_id=req.project_id,
        outsource_type=OutsourceType(req.outsource_type),
        episode_start=req.episode_start,
        episode_end=req.episode_end,
        amount=req.amount,
        recorded_by=current_user.id,
        record_date=req.record_date,
    )
    db.add(cost)
    db.commit()
    db.refresh(cost)
    return OutsourceCostOut(
        id=cost.id, project_id=cost.project_id,
        outsource_type=cost.outsource_type.value,
        episode_start=cost.episode_start, episode_end=cost.episode_end,
        amount=cost.amount, recorded_by=cost.recorded_by,
        record_date=cost.record_date, created_at=cost.created_at,
    )


@router.delete("/outsource/{cost_id}")
def delete_outsource_cost(
    cost_id: int,
    db: Session = Depends(get_db),
    current_user: User = Depends(require_role(UserRole.OWNER))
):
    cost = db.query(OutsourceCost).filter(OutsourceCost.id == cost_id).first()
    if not cost:
        raise HTTPException(status_code=404, detail="记录不存在")
    db.delete(cost)
    db.commit()
    return {"message": "已删除"}


# ──────────────────── 人力成本手动调整 ────────────────────

@router.post("/overrides")
def create_cost_override(
    req: CostOverrideCreate,
    db: Session = Depends(get_db),
    current_user: User = Depends(require_role(UserRole.OWNER, UserRole.SUPERVISOR))
):
    override = CostOverride(
        user_id=req.user_id,
        date=req.date,
        project_id=req.project_id,
        override_amount=req.override_amount,
        adjusted_by=current_user.id,
        reason=req.reason,
    )
    db.add(override)
    db.commit()
    return {"message": "已保存成本调整"}


@router.get("/overrides")
def list_cost_overrides(
    user_id: Optional[int] = Query(None),
    project_id: Optional[int] = Query(None),
    db: Session = Depends(get_db),
    current_user: User = Depends(require_role(UserRole.OWNER, UserRole.SUPERVISOR))
):
    q = db.query(CostOverride)
    if user_id:
        q = q.filter(CostOverride.user_id == user_id)
    if project_id:
        q = q.filter(CostOverride.project_id == project_id)
    records = q.order_by(CostOverride.date.desc()).all()
    return [
        {
            "id": r.id, "user_id": r.user_id, "date": r.date,
            "project_id": r.project_id, "override_amount": r.override_amount,
            "adjusted_by": r.adjusted_by, "reason": r.reason,
            "created_at": r.created_at,
        }
        for r in records
    ]