from __future__ import annotations

from typing import Annotated

from fastapi import APIRouter, Depends, File, HTTPException, UploadFile, status

from app.api.deps import require_student
from app.core.database import get_connection
from app.core.ratelimit import check_diagnosis_rate_limit
from app.core.schemas import (
    DiagnosisAnswerRequest,
    DiagnosisResponse,
    DiagnosisStartRequest,
    FeedbackRequest,
    OrderCreateRequest,
    OrderDetailOut,
    OrderSummaryOut,
    ReworkRequest,
    SavedAddressOut,
    UserProfile,
)
from app.services import repository
from app.services.diagnosis import get_diagnosis_provider

router = APIRouter(prefix="/api/student", tags=["student"])


@router.post("/diagnosis/start", response_model=DiagnosisResponse)
async def start_diagnosis(
    payload: DiagnosisStartRequest,
    _: Annotated[UserProfile, Depends(require_student)],
    _rl: None = Depends(check_diagnosis_rate_limit),
) -> DiagnosisResponse:
    provider = get_diagnosis_provider()
    return await provider.start(payload.message)


@router.post("/diagnosis/answer", response_model=DiagnosisResponse)
async def answer_diagnosis(
    payload: DiagnosisAnswerRequest,
    _: Annotated[UserProfile, Depends(require_student)],
    _rl: None = Depends(check_diagnosis_rate_limit),
) -> DiagnosisResponse:
    try:
        provider = get_diagnosis_provider()
        return await provider.answer(payload.session_id, payload.answers)
    except KeyError as error:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=error.args[0]) from error


@router.get("/addresses", response_model=list[SavedAddressOut])
def list_addresses(user: Annotated[UserProfile, Depends(require_student)]) -> list[dict[str, object]]:
    with get_connection() as connection:
        return repository.list_addresses(connection, user.id)


@router.delete("/addresses/{address_id}")
def delete_address(address_id: int, user: Annotated[UserProfile, Depends(require_student)]) -> dict[str, str]:
    with get_connection() as connection:
        if not repository.delete_address(connection, address_id, user.id):
            raise HTTPException(status_code=404, detail="地址不存在")
    return {"message": "已删除"}


@router.post("/orders")
def create_order(payload: OrderCreateRequest, user: Annotated[UserProfile, Depends(require_student)]) -> dict[str, int]:
    with get_connection() as connection:
        order_id = repository.create_order(connection, user, payload)
    return {"order_id": order_id}


@router.post("/orders/{order_id}/attachments")
def upload_attachments(
    order_id: int,
    user: Annotated[UserProfile, Depends(require_student)],
    files: Annotated[list[UploadFile], File(...)],
) -> dict[str, str]:
    with get_connection() as connection:
        order = repository.get_order_detail(connection, order_id, student_id=user.id)
        if order is None:
            raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="order_not_found")
        for file in files:
            try:
                repository.save_attachment(connection, order_id, file)
            except ValueError as error:
                raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(error)) from error
    return {"status": "ok"}


@router.post("/orders/{order_id}/cancel")
def cancel_order(
    order_id: int,
    user: Annotated[UserProfile, Depends(require_student)],
) -> dict[str, str]:
    with get_connection() as connection:
        try:
            repository.cancel_order(connection, order_id, user)
        except KeyError as error:
            raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=error.args[0]) from error
        except ValueError as error:
            raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=error.args[0]) from error
    return {"status": "ok"}


@router.get("/orders", response_model=list[OrderSummaryOut])
def list_orders(user: Annotated[UserProfile, Depends(require_student)]) -> list[dict[str, str]]:
    with get_connection() as connection:
        return repository.list_orders(connection, student_id=user.id)


@router.get("/orders/{order_id}", response_model=OrderDetailOut)
def get_order(order_id: int, user: Annotated[UserProfile, Depends(require_student)]) -> dict[str, str]:
    with get_connection() as connection:
        detail = repository.get_order_detail(connection, order_id, student_id=user.id)
    if detail is None:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="order_not_found")
    return detail


@router.post("/orders/{order_id}/confirm")
def confirm_order(order_id: int, user: Annotated[UserProfile, Depends(require_student)]) -> dict[str, str]:
    with get_connection() as connection:
        try:
            repository.confirm_order(connection, order_id, user)
        except KeyError as error:
            raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=error.args[0]) from error
        except ValueError as error:
            raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=error.args[0]) from error
    return {"status": "ok"}


@router.post("/orders/{order_id}/feedback")
def submit_feedback(
    order_id: int,
    payload: FeedbackRequest,
    user: Annotated[UserProfile, Depends(require_student)],
) -> dict[str, str]:
    with get_connection() as connection:
        try:
            repository.add_feedback(connection, order_id, user, payload)
        except KeyError as error:
            raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=error.args[0]) from error
        except ValueError as error:
            raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=error.args[0]) from error
    return {"status": "ok"}


@router.post("/orders/{order_id}/rework")
def submit_rework(
    order_id: int,
    payload: ReworkRequest,
    user: Annotated[UserProfile, Depends(require_student)],
) -> dict[str, str]:
    with get_connection() as connection:
        try:
            repository.request_rework(connection, order_id, user, payload)
        except KeyError as error:
            raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail=error.args[0]) from error
        except ValueError as error:
            raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=error.args[0]) from error
    return {"status": "ok"}