"""
合同管理路由 —— /api/contracts
"""
from __future__ import annotations
import uuid
from fastapi import APIRouter, Body, Depends, Query, UploadFile, File
from sqlalchemy.ext.asyncio import AsyncSession
from app.api.deps import get_current_user, get_current_company_id
from app.db.database import get_db
from app.schemas.auth import CurrentUserPayload
from app.schemas.contract import ContractCreate, ContractUpdate
from app.schemas.response import ok
from app.services import contract_service as svc

router = APIRouter(prefix="/contracts", tags=["合同管理"])


@router.post("", summary="新增合同")
async def create_contract(
    body: ContractCreate,
    db: AsyncSession = Depends(get_db),
    current_user: CurrentUserPayload = Depends(get_current_user),
    company_id: uuid.UUID = Depends(get_current_company_id),
) -> dict:
    result = await svc.create_contract(db, current_user, company_id, body)
    return ok(data=result.model_dump(mode="json"), message="合同创建成功")


@router.get("", summary="合同列表（分页）")
async def list_contracts(
    page: int = Query(1, ge=1),
    size: int = Query(20, ge=1, le=100),
    keyword: str | None = Query(None, description="合同编号搜索"),
    status: str | None = Query(None, description="状态筛选"),
    db: AsyncSession = Depends(get_db),
    current_user: CurrentUserPayload = Depends(get_current_user),
    company_id: uuid.UUID = Depends(get_current_company_id),
) -> dict:
    result = await svc.list_contracts(db, company_id, page, size, keyword, status)
    return ok(data=result.model_dump(mode="json"))


@router.get("/{contract_id}", summary="合同详情（含执行进度）")
async def get_contract(
    contract_id: uuid.UUID,
    db: AsyncSession = Depends(get_db),
    current_user: CurrentUserPayload = Depends(get_current_user),
    company_id: uuid.UUID = Depends(get_current_company_id),
) -> dict:
    result = await svc.get_contract(db, contract_id, company_id)
    return ok(data=result.model_dump(mode="json"))


@router.put("/{contract_id}", summary="编辑合同")
async def update_contract(
    contract_id: uuid.UUID,
    body: ContractUpdate,
    db: AsyncSession = Depends(get_db),
    current_user: CurrentUserPayload = Depends(get_current_user),
    company_id: uuid.UUID = Depends(get_current_company_id),
) -> dict:
    result = await svc.update_contract(db, contract_id, company_id, body)
    return ok(data=result.model_dump(mode="json"), message="合同已更新")


@router.delete("/{contract_id}", summary="删除合同")
async def delete_contract(
    contract_id: uuid.UUID,
    db: AsyncSession = Depends(get_db),
    current_user: CurrentUserPayload = Depends(get_current_user),
    company_id: uuid.UUID = Depends(get_current_company_id),
) -> dict:
    await svc.delete_contract(db, contract_id, company_id)
    return ok(message="合同已删除")


@router.post("/{contract_id}/generate-order", summary="一键从合同生成订单")
async def generate_order_from_contract(
    contract_id: uuid.UUID,
    db: AsyncSession = Depends(get_db),
    current_user: CurrentUserPayload = Depends(get_current_user),
    company_id: uuid.UUID = Depends(get_current_company_id),
) -> dict:
    result = await svc.generate_order_from_contract(db, current_user, contract_id, company_id)
    return ok(data=result, message="订单生成成功")


@router.get("/{contract_id}/generate", summary="生成合同 Word 文档下载")
async def generate_contract_document(
    contract_id: uuid.UUID,
    db: AsyncSession = Depends(get_db),
    current_user: CurrentUserPayload = Depends(get_current_user),
    company_id: uuid.UUID = Depends(get_current_company_id),
):
    from fastapi.responses import Response
    docx_bytes = await svc.generate_contract_docx(db, contract_id, company_id)
    return Response(
        content=docx_bytes,
        media_type="application/vnd.openxmlformats-officedocument.wordprocessingml.document",
        headers={"Content-Disposition": f"attachment; filename=contract_{contract_id}.docx"},
    )


@router.post("/{contract_id}/upload-signed", summary="上传双签盖章版")
async def upload_signed_copy(
    contract_id: uuid.UUID,
    file: UploadFile = File(...),
    db: AsyncSession = Depends(get_db),
    current_user: CurrentUserPayload = Depends(get_current_user),
    company_id: uuid.UUID = Depends(get_current_company_id),
) -> dict:
    import os
    from app.models.contract import ErpContract, ErpContractAttachment
    from sqlalchemy import update as sa_update

    # 验证合同存在
    from sqlalchemy import select as sa_select
    contract = (await db.execute(
        sa_select(ErpContract).where(
            ErpContract.id == contract_id,
            ErpContract.company_id == company_id,
            ErpContract.is_deleted.is_(False),
        )
    )).scalar_one_or_none()
    if contract is None:
        raise Exception("合同不存在")

    # 保存文件
    upload_dir = f"uploads/contracts/{contract_id}"
    os.makedirs(upload_dir, exist_ok=True)
    file_path = f"{upload_dir}/{file.filename}"
    with open(file_path, "wb") as f:
        content = await file.read()
        f.write(content)

    file_url = f"/{file_path}"

    # 记录附件
    attachment = ErpContractAttachment(
        contract_id=contract_id,
        file_name=file.filename or "signed_copy",
        file_url=file_url,
        file_type="signed_copy",
        uploader_id=current_user.user_id,
    )
    db.add(attachment)

    # 更新合同签署状态
    await db.execute(
        sa_update(ErpContract)
        .where(ErpContract.id == contract_id)
        .values(is_signed=True, signed_file_url=file_url)
    )
    await db.commit()

    return ok(message="双签盖章版上传成功", data={"file_url": file_url})