"use client";

import React, { useState, useEffect } from "react";
import { useTranslation } from "react-i18next";
import { BomWeightingScoreResult } from "@/app/api/settings/bomWeighting";
import { fetchBomWeightingScoresClient } from "@/app/api/settings/bomWeighting/client";
import type { BomScoreResult } from "@/app/api/bom";
import { fetchBomScoresClient } from "@/app/api/bom/client";
import BomWeightingScoreTable from "@/components/BomWeightingScoreTable";
import BomScoreTable from "@/components/BomScoreTable";
import Tabs from "@mui/material/Tabs";
import Tab from "@mui/material/Tab";
import Box from "@mui/material/Box";
import Paper from "@mui/material/Paper";

interface Props {
  bomWeightingScores: BomWeightingScoreResult[];
}

const BomWeightingTabs: React.FC<Props> = ({ bomWeightingScores: initialBomWeightingScores }) => {
  const { t } = useTranslation(["bomWeighting", "common"]);
  const [tab, setTab] = useState(0);
  const [bomWeightingScores, setBomWeightingScores] = useState<BomWeightingScoreResult[]>(initialBomWeightingScores);
  const [bomScores, setBomScores] = useState<BomScoreResult[] | null>(null);
  const [loadingScores, setLoadingScores] = useState(false);
  const [loadError, setLoadError] = useState<string | null>(null);

  const loadBomScores = React.useCallback(async () => {
    try {
      setLoadingScores(true);
      setLoadError(null);
      console.log("Fetching BOM scores from /bom/scores...");
      const data = await fetchBomScoresClient();
      console.log("BOM scores received:", data);
      setBomScores(data || []);
    } catch (err: any) {
      console.error("Failed to load BOM scores:", err);
      const errorMsg =
        err?.response?.data?.message || err?.message || t("Update Failed") || "Load failed";
      setLoadError(errorMsg);
      setBomScores([]);
    } finally {
      setLoadingScores(false);
    }
  }, [t]);

  const loadBomWeightingScores = React.useCallback(async () => {
    try {
      console.log("Fetching BOM weighting scores...");
      const data = await fetchBomWeightingScoresClient();
      console.log("BOM weighting scores received:", data);
      setBomWeightingScores(data || []);
    } catch (err: any) {
      console.error("Failed to load BOM weighting scores:", err);
    }
  }, []);

  const handleWeightingUpdated = React.useCallback(async () => {
    // Refresh both weighting scores and BOM scores
    await Promise.all([
      loadBomWeightingScores(),
      loadBomScores()
    ]);
  }, [loadBomWeightingScores, loadBomScores]);

  // Sync initial prop values
  useEffect(() => {
    setBomWeightingScores(initialBomWeightingScores);
  }, [initialBomWeightingScores]);

  useEffect(() => {
    if (tab !== 1) return;
    void loadBomScores();
  }, [tab, loadBomScores]);

  return (
    <>
      <Paper
        variant="outlined"
        sx={{
          mb: 2,
          borderBottomLeftRadius: 0,
          borderBottomRightRadius: 0,
        }}
      >
        <Tabs
          value={tab}
          onChange={(_, v) => setTab(v)}
          indicatorColor="primary"
          textColor="primary"
          sx={{
            pl: 2,
            minHeight: 44,
          }}
        >
          <Tab
            label={t("Material Weighting")}
            value={0}
            sx={{ textTransform: "none", fontSize: 16, px: 3, minHeight: 44 }}
          />
          <Tab
            label={t("Material Score")}
            value={1}
            sx={{ textTransform: "none", fontSize: 16, px: 3, minHeight: 44 }}
          />
        </Tabs>
      </Paper>

      <Box>
        {tab === 0 && (
          <BomWeightingScoreTable 
            bomWeightingScores={bomWeightingScores}
            onWeightingUpdated={handleWeightingUpdated}
          />
        )}
        {tab === 1 && (
          loadingScores ? (
            <Paper
              variant="outlined"
              sx={{
                p: 3,
                borderTopLeftRadius: 0,
                borderTopRightRadius: 0,
              }}
            >
              <div className="text-slate-700">{t("Loading")}</div>
            </Paper>
          ) : loadError ? (
            <Paper
              variant="outlined"
              sx={{
                p: 3,
                borderTopLeftRadius: 0,
                borderTopRightRadius: 0,
              }}
            >
              <div className="text-slate-700 text-red-600">{loadError}</div>
            </Paper>
          ) : bomScores && bomScores.length > 0 ? (
            <BomScoreTable boms={bomScores} />
          ) : (
            <Paper
              variant="outlined"
              sx={{
                p: 3,
                borderTopLeftRadius: 0,
                borderTopRightRadius: 0,
              }}
            >
              <div className="text-slate-700">{t("No data available")}</div>
            </Paper>
          )
        )}
      </Box>
    </>
  );
};

export default BomWeightingTabs;

