from __future__ import annotations

import logging
from typing import Annotated
from datetime import datetime
from zoneinfo import ZoneInfo

from fastapi import APIRouter, Depends
from sqlalchemy.dialects.postgresql import insert
from sqlalchemy.orm import Session

from app.api.v1.schemas import FeedCheckpointIn, FeedWaitingTimeIn
from app.core.config import settings
from app.db.models import RawOpdCheckpoint, RawWaitingTime
from app.security.dependencies import get_db, require_permission
from app.utils.supabase_client import SupabaseAPIError, upsert_to_supabase_sync

logger = logging.getLogger(__name__)

router = APIRouter(prefix="/api/v1")

PERM_FEED_CHECKPOINT_WRITE = "feed.checkpoint:write"
PERM_FEED_OLD_CHECKPOINT_WRITE = "feed.old-checkpoint:write"


def _to_tz(dt):
    if dt is None:
        return None
    if dt.tzinfo is None:
        return dt.replace(tzinfo=ZoneInfo(settings.TIMEZONE))
    return dt.astimezone(ZoneInfo(settings.TIMEZONE))


def _to_iso(dt):
    """Convert datetime to ISO 8601 string for Supabase API."""
    if dt is None:
        return None
    return dt.isoformat()


@router.post("/feed/checkpoint")
def upsert_feed_checkpoint(
    payload: list[FeedWaitingTimeIn],
    _: Annotated[object, Depends(require_permission(PERM_FEED_CHECKPOINT_WRITE))],
    db: Annotated[Session, Depends(get_db)],
):
    rows = []
    supabase_rows = []
    
    for item in payload:
        rows.append(
            {
                "id": item.id,
                "vn": item.vn,
                "txn": item.txn,
                "hn": item.hn,
                "name": item.name,
                "doctor_code": item.doctor_code,
                "doctor_name": item.doctor_name,
                "location_code": item.location_code,
                "location_name": item.location_name,
                "step_name": item.step_name,
                "time": _to_tz(item.time),
                "updated_at": datetime.now(ZoneInfo(settings.TIMEZONE)),
            }
        )

        supabase_row = {
            "vn": item.vn,
            "txn": item.txn,
            "hn": item.hn,
            "name": item.name,
            "doctor_code": item.doctor_code,
            "doctor_name": item.doctor_name,
            "location_code": item.location_code,
            "location_name": item.location_name,
            "step_name": item.step_name,
            "time": _to_tz(item.time).isoformat(),
            "updated_at": datetime.now(ZoneInfo(settings.TIMEZONE)).isoformat(),
        }
        # if item.id is None:
        #     del supabase_row[-1]["id"]
        supabase_rows.append(supabase_row)

    stmt = insert(RawWaitingTime).values(rows)
    update_cols = {
        "vn": stmt.excluded.vn,
        "txn": stmt.excluded.txn,
        "hn": stmt.excluded.hn,
        "name": stmt.excluded.name,
        "doctor_code": stmt.excluded.doctor_code,
        "doctor_name": stmt.excluded.doctor_name,
        "location_code": stmt.excluded.location_code,
        "location_name": stmt.excluded.location_name,
        "step_name": stmt.excluded.step_name,
        "time": stmt.excluded.time,
        "updated_at": stmt.excluded.updated_at,
    }

    stmt = stmt.on_conflict_do_update(index_elements=[RawWaitingTime.id], set_=update_cols)
    result = db.execute(stmt)
    db.commit()

    # Send data to Supabase via API call
    supabase_result = None
    supabase_error = None
    
    try:
        logger.info(f"Sending {len(supabase_rows)} records to Supabase API")
        supabase_result = upsert_to_supabase_sync(
            table="raw_waiting_time",
            data=supabase_rows
        )
        logger.info(f"Successfully sent data to Supabase: {supabase_result.get('status_code')}")
    except SupabaseAPIError as e:
        logger.error(f"Failed to send data to Supabase: {str(e)}")
        supabase_error = str(e)
    except Exception as e:
        logger.error(f"Unexpected error sending data to Supabase: {str(e)}")
        supabase_error = f"Unexpected error: {str(e)}"

    return {
        "upserted": len(rows),
        "rowcount": result.rowcount,
        "supabase": {
            "success": supabase_result is not None,
            "result": supabase_result,
            "error": supabase_error,
        },
    }

    #return {"upserted": len(rows), "rowcount": result.rowcount}


@router.post("/feed/old-checkpoint")
def upsert_opd_checkpoint(
    payload: list[FeedCheckpointIn],
    _: Annotated[object, Depends(require_permission(PERM_FEED_OLD_CHECKPOINT_WRITE))],
    db: Annotated[Session, Depends(get_db)],
):
    rows = []
    supabase_rows = []
    
    for item in payload:
        # Prepare data for local database
        row = {
            "id": item.id,
            "hn": item.hn,
            "vn": item.vn,
            "location": item.location,
            "type": item.type,
            "timestamp_in": _to_tz(item.timestamp_in),
            "timestamp_out": _to_tz(item.timestamp_out),
            "waiting_time": item.waiting_time,
            "bu": item.bu,
        }
        if item.id is None:
            del row["id"]
        rows.append(row)
        
        # Prepare data for Supabase API (convert datetime to ISO string)
        supabase_row = {
            "id": item.id,
            "hn": item.hn,
            "vn": item.vn,
            "location": item.location,
            "type": item.type,
            "timestamp_in": _to_iso(_to_tz(item.timestamp_in)),
            "timestamp_out": _to_iso(_to_tz(item.timestamp_out)),
            "waiting_time": item.waiting_time,
            "bu": item.bu,
        }
        if item.id is None:
            del supabase_row["id"]
        supabase_rows.append(supabase_row)

    # Insert/update to local database
    stmt = insert(RawOpdCheckpoint).values(rows)
    update_cols = {
        "id": stmt.excluded.id,
        "type": stmt.excluded.type,
        "timestamp_in": stmt.excluded.timestamp_in,
        "timestamp_out": stmt.excluded.timestamp_out,
        "waiting_time": stmt.excluded.waiting_time,
        "bu": stmt.excluded.bu,
    }

    stmt = stmt.on_conflict_do_update(
        index_elements=[RawOpdCheckpoint.hn, RawOpdCheckpoint.vn, RawOpdCheckpoint.location],
        set_=update_cols,
    )
    result = db.execute(stmt)
    db.commit()

    # Send data to Supabase via API call
    supabase_result = None
    supabase_error = None
    
    try:
        logger.info(f"Sending {len(supabase_rows)} records to Supabase API")
        supabase_result = upsert_to_supabase_sync(
            table="raw_opd_checkpoint",
            data=supabase_rows,
            on_conflict="hn,vn,location",
        )
        logger.info(f"Successfully sent data to Supabase: {supabase_result.get('status_code')}")
    except SupabaseAPIError as e:
        logger.error(f"Failed to send data to Supabase: {str(e)}")
        supabase_error = str(e)
    except Exception as e:
        logger.error(f"Unexpected error sending data to Supabase: {str(e)}")
        supabase_error = f"Unexpected error: {str(e)}"

    return {
        "upserted": len(rows),
        "rowcount": result.rowcount,
        "supabase": {
            "success": supabase_result is not None,
            "result": supabase_result,
            "error": supabase_error,
        },
    }