from fastapi import APIRouter,Depends,HTTPException,Query
from fastapi.responses import JSONResponse
from pydantic import BaseModel
from sqlalchemy.ext.asyncio import AsyncSession

from db_setup import get_session
from g_sheet.views import (
    SheetFormData,
    SheetHealth,
    SheetImport,
    SheetRead,
    SheetWrite,
)
from users.permissions import PermissionTag,require_permission
from dotenv import load_dotenv
load_dotenv()

router = APIRouter()


def _city_values(city: str | None):
    if not city or not str(city).strip():
        return None
    parts=[p.strip() for p in str(city).split(",") if p.strip()]
    return parts or None


class AppendRowsBody(BaseModel):
    rows: list[list[str]]


class UpdateRangeBody(BaseModel):
    cell_range: str
    rows: list[list[str]]


class ClearRangeBody(BaseModel):
    cell_range: str


@router.get("/sheet/health")
async def sheet_health():
    """Liveness for the Sheets integration — credentials + spreadsheet reachability.

    Unauthenticated like GET /health in main.py, and never 500s: an unreachable sheet
    comes back as {"status":"error"} so a probe can read the reason.
    """
    try:
        service=SheetHealth()
        data=await service.health_check()
        return JSONResponse(content={"data":data,"total":1,"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.get("/sheet/metadata")
async def fetch_sheet_metadata(
    spreadsheet_id: str | None = Query(None),
    current_user: dict = Depends(require_permission(PermissionTag.SETTINGS_VIEW)),
):
    try:
        service=SheetRead(spreadsheet_id=spreadsheet_id)
        data=await service.get_metadata()
        return JSONResponse(content={"data":data,"total":1,"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.get("/sheet/tabs")
async def fetch_sheet_tabs(
    spreadsheet_id: str | None = Query(None),
    current_user: dict = Depends(require_permission(PermissionTag.SETTINGS_VIEW)),
):
    try:
        service=SheetRead(spreadsheet_id=spreadsheet_id)
        items=await service.list_tabs()
        return JSONResponse(content={"data":items,"total":len(items),"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.get("/sheet/fetch")
async def fetch_sheet(
    tab: str | None = Query(None),
    cell_range: str | None = Query(None),
    raw: bool = Query(False),
    current_user: dict = Depends(require_permission(PermissionTag.SETTINGS_VIEW)),
    spreadsheet_id: str | None = Query(None),
):
    """No tab -> every tab as records. With a tab -> that tab, header-mapped unless
    raw=true, which returns the rows exactly as the sheet stores them."""
    try:
        service=SheetRead(spreadsheet_id=spreadsheet_id)
        if not tab:
            data=await service.read_all()
            return JSONResponse(content={"data":data["sheets"],"total":data["total"],"status_code":200})
        if raw or cell_range:
            data=await service.read_range(tab,cell_range)
            return JSONResponse(content={"data":data,"total":data["row_count"],"status_code":200})
        data=await service.read_records(tab)
        return JSONResponse(content={"data":data["records"],"total":data["total"],"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.post("/sheet/import")
async def import_all_sheets(
    tab: str | None = Query(None),
    current_user: dict = Depends(require_permission(PermissionTag.SETTINGS_EDIT)),
    session: AsyncSession = Depends(get_session),
):
    """No tab -> every tab. With a tab -> that sheet only. Poll GET /sheet/import/fetch."""
    try:
        service=SheetImport(session=session)
        data=await service.start_import(current_user=current_user,tab=tab)
        return JSONResponse(content={"data":data,"total":1,"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.post("/sheet/{tab}/import")
async def import_one_sheet(
    tab: str,
    current_user: dict = Depends(require_permission(PermissionTag.SETTINGS_EDIT)),
    session: AsyncSession = Depends(get_session),
):
    """Enqueue a single-tab import. Poll GET /sheet/import/fetch for status."""
    try:
        service=SheetImport(session=session)
        data=await service.start_import(current_user=current_user,tab=tab)
        return JSONResponse(content={"data":data,"total":1,"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.get("/sheet/import/fetch")
async def fetch_sheet_import(
    run_id: str | None = Query(None),
    current_user: dict = Depends(require_permission(PermissionTag.SETTINGS_VIEW)),
    session: AsyncSession = Depends(get_session),
):
    try:
        service=SheetImport(session=session)
        data=await service.get_import_run(run_id=run_id)
        return JSONResponse(content={"data":data,"total":1,"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


# Form-data reads are shared by Settings (import UI) and Inbox (form applicants).
_FORM_DATA_READ = require_permission(
    PermissionTag.INBOX_VIEW, PermissionTag.SETTINGS_VIEW, require_all=False,
)
_FORM_DATA_EDIT = require_permission(
    PermissionTag.INBOX_EDIT, PermissionTag.SETTINGS_EDIT, require_all=False,
)


class AssignFormJobPostBody(BaseModel):
    job_post_id: str | None = None


class FormProcessingStateBody(BaseModel):
    processing_state: str


class FormDuplicateBody(BaseModel):
    is_duplicate: bool


@router.get("/sheet/form-data/sheets")
async def fetch_form_data_sheets(
    current_user: dict = Depends(_FORM_DATA_READ),
    session: AsyncSession = Depends(get_session),
):
    try:
        service=SheetFormData(session=session)
        data=await service.get_imported_sheets()
        return JSONResponse(content={"data":data,"total":data["total"],"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.get("/sheet/form-data/fetch")
async def fetch_form_data(
    sheet: str | None = Query(None),
    search: str | None = Query(None),
    processing_state: str | None = Query(None),
    is_duplicate: bool | None = Query(None),
    has_linkedin: bool | None = Query(None),
    has_resume: bool | None = Query(None),
    city: str | None = Query(None),
    source: str | None = Query(None),
    assigned: bool | None = Query(None),
    no_suggestions: bool | None = Query(None),
    offset: int = Query(0,ge=0),
    limit: int | None = Query(None,ge=1,le=500),
    current_user: dict = Depends(_FORM_DATA_READ),
    session: AsyncSession = Depends(get_session),
):
    try:
        service=SheetFormData(session=session)
        items,total=await service.get_form_data(
            sheet=sheet,search=search,offset=offset,limit=limit,
            processing_state=processing_state,is_duplicate=is_duplicate,
            has_linkedin=has_linkedin,has_resume=has_resume,
            city=_city_values(city),source=(source or "").strip() or None,
            assigned=assigned,no_suggestions=no_suggestions,
        )
        return JSONResponse(content={"data":items,"total":total,"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.get("/sheet/form-data/counts")
async def fetch_form_data_counts(
    sheet: str | None = Query(None),
    # The badges narrow with the list. Without these the tab counts describe the
    # whole sheet while the rows beneath them describe a filtered slice.
    # processing_state and is_duplicate are absent on purpose: those two ARE the
    # tabs, so passing them would make every badge report the current tab.
    search: str | None = Query(None),
    has_linkedin: bool | None = Query(None),
    has_resume: bool | None = Query(None),
    city: str | None = Query(None),
    source: str | None = Query(None),
    assigned: bool | None = Query(None),
    current_user: dict = Depends(_FORM_DATA_READ),
    session: AsyncSession = Depends(get_session),
):
    try:
        service=SheetFormData(session=session)
        data=await service.get_counts(
            sheet=sheet,search=search,has_linkedin=has_linkedin,has_resume=has_resume,
            city=_city_values(city),source=(source or "").strip() or None,assigned=assigned,
        )
        return JSONResponse(content={"data":data,"total":1,"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.get("/sheet/form-data/count")
async def count_form_data(
    sheet: str | None = Query(None),
    current_user: dict = Depends(_FORM_DATA_READ),
    session: AsyncSession = Depends(get_session),
):
    """Unfiltered form_data total for a sheet. Called once when Sheet Forms opens."""
    try:
        service=SheetFormData(session=session)
        total=await service.count_rows(sheet=sheet)
        return JSONResponse(content={"data":{"total":total},"total":total,"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.get("/sheet/form-data/{record_id}")
async def fetch_form_data_by_id(
    record_id: str,
    current_user: dict = Depends(_FORM_DATA_READ),
    session: AsyncSession = Depends(get_session),
):
    try:
        service=SheetFormData(session=session)
        data=await service.get_form_data_by_id(record_id)
        return JSONResponse(content={"data":data,"total":1,"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.patch("/sheet/form-data/{record_id}/assign-job-post")
async def assign_form_job_post(
    record_id: str,
    payload: AssignFormJobPostBody,
    current_user: dict = Depends(_FORM_DATA_EDIT),
    session: AsyncSession = Depends(get_session),
):
    try:
        service=SheetFormData(session=session)
        data=await service.assign_job_post(record_id,payload.job_post_id)
        return JSONResponse(content={"data":data,"total":1,"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.patch("/sheet/form-data/{record_id}/processing-state")
async def set_form_processing_state(
    record_id: str,
    payload: FormProcessingStateBody,
    current_user: dict = Depends(_FORM_DATA_EDIT),
    session: AsyncSession = Depends(get_session),
):
    try:
        service=SheetFormData(session=session)
        data=await service.set_processing_state(record_id,payload.processing_state,current_user)
        return JSONResponse(content={"data":data,"total":1,"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.patch("/sheet/form-data/{record_id}/duplicate")
async def set_form_duplicate(
    record_id: str,
    payload: FormDuplicateBody,
    current_user: dict = Depends(_FORM_DATA_EDIT),
    session: AsyncSession = Depends(get_session),
):
    try:
        service=SheetFormData(session=session)
        data=await service.set_duplicate(record_id,payload.is_duplicate)
        return JSONResponse(content={"data":data,"total":1,"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.delete("/sheet/form-data/{tab}/delete")
async def delete_form_data_sheet(
    tab: str,
    current_user: dict = Depends(require_permission(PermissionTag.SETTINGS_DELETE)),
    session: AsyncSession = Depends(get_session),
):
    try:
        service=SheetFormData(session=session)
        data=await service.delete_sheet_data(tab)
        return JSONResponse(content={"data":data,"total":1,"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.post("/sheet/{tab}/append")
async def append_sheet_rows(
    tab: str,
    payload: AppendRowsBody,
    current_user: dict = Depends(require_permission(PermissionTag.SETTINGS_EDIT)),
    spreadsheet_id: str | None = Query(None),
):
    try:
        service=SheetWrite(spreadsheet_id=spreadsheet_id)
        data=await service.append_rows(tab,payload.rows)
        return JSONResponse(content={"data":data,"total":1,"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.patch("/sheet/{tab}/update")
async def update_sheet_range(
    tab: str,
    payload: UpdateRangeBody,
    current_user: dict = Depends(require_permission(PermissionTag.SETTINGS_EDIT)),
    spreadsheet_id: str | None = Query(None),
):
    try:
        service=SheetWrite(spreadsheet_id=spreadsheet_id)
        data=await service.update_range(tab,payload.cell_range,payload.rows)
        return JSONResponse(content={"data":data,"total":1,"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))


@router.post("/sheet/{tab}/clear")
async def clear_sheet_range(
    tab: str,
    payload: ClearRangeBody,
    current_user: dict = Depends(require_permission(PermissionTag.SETTINGS_EDIT)),
    spreadsheet_id: str | None = Query(None),
):
    try:
        service=SheetWrite(spreadsheet_id=spreadsheet_id)
        data=await service.clear_range(tab,payload.cell_range)
        return JSONResponse(content={"data":data,"total":1,"status_code":200})
    except HTTPException:
        raise
    except Exception as e:
        raise HTTPException(status_code=500,detail=str(e))