import mimetypes
from typing import List, Optional

from fastapi import APIRouter, Depends, File, Form, HTTPException, UploadFile, status
from sqlalchemy.orm import Session

from app.core.bx_auth import BxUserContext, get_bx_current_user
from app.core.database import get_db
from app.schemas.bx.common import ApiResponse, PagedData
from app.schemas.bx.invoice import InvoiceOut, LedgerOut, WalletSummaryOut
from app.services.bx.invoice import InvoiceService

router = APIRouter(tags=["发票夹"])


@router.get("/invoice-wallets/mine/summary", response_model=ApiResponse[WalletSummaryOut])
def get_mine_wallet_summary(
    db: Session = Depends(get_db),
    user: BxUserContext = Depends(get_bx_current_user),
):
    data = InvoiceService.get_mine_summary(db, user=user)
    return ApiResponse(data=WalletSummaryOut.model_validate(data))


@router.get("/invoice-wallets", response_model=ApiResponse[PagedData[WalletSummaryOut]])
def list_invoice_wallets(
    page: int = 1,
    pageSize: int = 10,
    keyword: str = "",
    db: Session = Depends(get_db),
    user: BxUserContext = Depends(get_bx_current_user),
):
    rows, total = InvoiceService.list_wallets(
        db, user=user, page=page, page_size=pageSize, keyword=keyword
    )
    out_rows = [WalletSummaryOut.model_validate(InvoiceService._summary_to_dict(r)) for r in rows]
    return ApiResponse(data=PagedData(rows=out_rows, total=total, page=page, page_size=pageSize))


@router.get("/invoices", response_model=ApiResponse[PagedData[InvoiceOut]])
def list_invoices(
    page: int = 1,
    pageSize: int = 10,
    userId: Optional[str] = None,
    db: Session = Depends(get_db),
    user: BxUserContext = Depends(get_bx_current_user),
):
    tenant_no = InvoiceService._tenant_no(db, user)
    rows, total = InvoiceService.list_invoices(
        db, user=user, owner_user_id=userId, page=page, page_size=pageSize
    )
    out_rows = InvoiceService.out_rows_with_attachments(db, tenant_no, list(rows))
    return ApiResponse(
        data=PagedData(
            rows=[InvoiceOut.model_validate(r) for r in out_rows],
            total=total,
            page=page,
            page_size=pageSize,
        )
    )


@router.post("/invoices", response_model=ApiResponse[InvoiceOut])
def create_invoice(
    file: UploadFile = File(...),
    amount: float = Form(...),
    remark: str = Form(""),
    targetUserId: Optional[str] = Form(None),
    db: Session = Depends(get_db),
    user: BxUserContext = Depends(get_bx_current_user),
):
    if not file or not file.filename:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="请选择文件")
    file_data = file.file.read()
    content_type = (
        file.content_type
        or mimetypes.guess_type(file.filename or "")[0]
        or "application/octet-stream"
    )
    try:
        invoice = InvoiceService.create(
            db,
            user=user,
            amount=amount,
            file_data=file_data,
            filename=file.filename or "unknown",
            content_type=content_type,
            remark=remark,
            target_user_id=targetUserId,
        )
        db.commit()
        db.refresh(invoice)
    except HTTPException:
        db.rollback()
        raise
    except Exception as exc:
        db.rollback()
        raise HTTPException(
            status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="上传发票失败"
        ) from exc

    tenant_no = InvoiceService._tenant_no(db, user)
    out = InvoiceService.out_rows_with_attachments(db, tenant_no, [invoice])[0]
    return ApiResponse(data=InvoiceOut.model_validate(out))


@router.delete("/invoices/{invoice_id}", response_model=ApiResponse[bool])
def delete_invoice(
    invoice_id: str,
    db: Session = Depends(get_db),
    user: BxUserContext = Depends(get_bx_current_user),
):
    try:
        success = InvoiceService.delete(db, user=user, invoice_id=invoice_id)
        db.commit()
    except HTTPException:
        db.rollback()
        raise
    return ApiResponse(data=success)


@router.get("/invoice-ledgers", response_model=ApiResponse[List[LedgerOut]])
def list_invoice_ledgers(
    userId: Optional[str] = None,
    db: Session = Depends(get_db),
    user: BxUserContext = Depends(get_bx_current_user),
):
    rows = InvoiceService.list_ledgers(db, user=user, owner_user_id=userId)
    return ApiResponse(data=[LedgerOut.model_validate(r) for r in rows])