from fastapi import APIRouter, Depends, Request
from fastapi.responses import JSONResponse, Response
from sqlalchemy.orm import Session

from app.core.response import error, ok
from app.db.models import Child, User
from app.db.session import get_db
from app.deps import get_current_user
from app.services import pdf_export, reports as report_service

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


@router.get("")
def list_reports(
    childId: int,
    request: Request,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    reports = report_service.list_reports_for_child(db, current_user.id, childId)
    if reports is None:
        return JSONResponse(
            status_code=404,
            content=error(10004, "child_not_found", request.state.request_id),
        )
    items = [report_service.report_to_dict(report) for report in reports]
    return ok({"list": items}, request_id=request.state.request_id)


@router.get("/{report_id}")
def get_report(
    report_id: int,
    request: Request,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    report = report_service.get_report_for_user(db, current_user.id, report_id)
    if not report:
        return JSONResponse(
            status_code=404,
            content=error(10008, "report_not_found", request.state.request_id),
        )
    return ok(report_service.report_to_dict(report), request_id=request.state.request_id)


@router.get("/{report_id}/pdf")
def export_report_pdf(
    report_id: int,
    request: Request,
    db: Session = Depends(get_db),
    current_user: User = Depends(get_current_user),
):
    report = report_service.get_report_for_user(db, current_user.id, report_id)
    if not report:
        return JSONResponse(
            status_code=404,
            content=error(10008, "report_not_found", request.state.request_id),
        )
    child = db.get(Child, report.child_id)
    pdf_bytes = pdf_export.build_report_pdf(report, child)
    filename = f"happy-up-report-{report_id}.pdf"
    return Response(
        content=pdf_bytes,
        media_type="application/pdf",
        headers={"Content-Disposition": f'attachment; filename="{filename}"'},
    )