from __future__ import annotations

from fastapi import APIRouter, Depends, HTTPException, Query, Request

from ..api_utils import file_meta, load_accounts, payload_to_account, read_register_payload
from ..auth import verify_accounts_auth, verify_admin_auth
from ..config import ACCOUNTS_PATH, CLASSNOTES_PATH, write_lock
from ..data import (
    ACCOUNT_STATUSES,
    DuplicateRecordError,
    account_summary,
    account_to_dict,
    create_account,
    filter_accounts,
    register_class_record_lines,
    register_payment_lines,
    update_account,
)
from ..schemas import AccountPayload


router = APIRouter()


@router.post("/api/register/class-records")
async def register_class_records(request: Request, _user: str = Depends(verify_admin_auth)):
    try:
        payload = await read_register_payload(request)
        with write_lock:
            result = register_class_record_lines(
                CLASSNOTES_PATH,
                ACCOUNTS_PATH,
                lines=payload.lines,
                line=payload.line,
            )
    except DuplicateRecordError as exc:
        raise HTTPException(status_code=409, detail=str(exc)) from exc
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc)) from exc
    return {"ok": True, **result}


@router.post("/api/register/payments")
async def register_payments(request: Request, _user: str = Depends(verify_admin_auth)):
    try:
        payload = await read_register_payload(request)
        with write_lock:
            result = register_payment_lines(ACCOUNTS_PATH, lines=payload.lines, line=payload.line)
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc)) from exc
    return {"ok": True, **result}


@router.get("/api/account-health")
def account_health(_user: str = Depends(verify_accounts_auth)):
    accounts = load_accounts()
    return {
        "ok": True,
        "accounts": file_meta(ACCOUNTS_PATH),
        "accounts_count": len(accounts),
        "account_summary": account_summary(accounts),
    }


@router.get("/api/accounts")
def accounts(
    q: str = Query("", description="学生姓名或学生ID"),
    status_filter: str = Query("", alias="status", description="账户状态"),
    _user: str = Depends(verify_accounts_auth),
):
    all_accounts = load_accounts()
    rows = filter_accounts(all_accounts, keyword=q, status=status_filter)
    return {
        "summary": account_summary(all_accounts),
        "count": len(rows),
        "accounts": [account_to_dict(account) for account in rows],
    }


@router.get("/api/accounts/{student}")
def account_detail(student: str, _user: str = Depends(verify_accounts_auth)):
    for account in load_accounts():
        if account.student == student or account.student_id == student:
            return account_to_dict(account)
    raise HTTPException(status_code=404, detail=f"未找到学生账户: {student}")


@router.get("/api/admin/statuses")
def admin_statuses(_user: str = Depends(verify_admin_auth)):
    return {"account_statuses": sorted(ACCOUNT_STATUSES)}


@router.post("/api/admin/accounts")
def admin_create_account(payload: AccountPayload, _user: str = Depends(verify_admin_auth)):
    try:
        with write_lock:
            result = create_account(ACCOUNTS_PATH, payload_to_account(payload))
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc)) from exc
    return {"ok": True, **result}


@router.put("/api/admin/accounts/{student_id}")
def admin_update_account(student_id: str, payload: AccountPayload, _user: str = Depends(verify_admin_auth)):
    try:
        with write_lock:
            result = update_account(ACCOUNTS_PATH, student_id, payload_to_account(payload))
    except ValueError as exc:
        raise HTTPException(status_code=400, detail=str(exc)) from exc
    return {"ok": True, **result}