"use client";

import { useCallback, useEffect, useMemo, useState } from "react";

import Alert from "@mui/material/Alert";
import Box from "@mui/material/Box";
import Card from "@mui/material/Card";
import CardContent from "@mui/material/CardContent";
import Chip from "@mui/material/Chip";
import Divider from "@mui/material/Divider";
import IconButton from "@mui/material/IconButton";
import LinearProgress from "@mui/material/LinearProgress";
import Stack from "@mui/material/Stack";
import Table from "@mui/material/Table";
import TableBody from "@mui/material/TableBody";
import TableCell from "@mui/material/TableCell";
import TableContainer from "@mui/material/TableContainer";
import TableHead from "@mui/material/TableHead";
import TableRow from "@mui/material/TableRow";
import Tooltip from "@mui/material/Tooltip";
import Typography from "@mui/material/Typography";

import FertilizationPlanParserPage from "@views/dashboards/farm/fertilizationPlanParser/FertilizationPlanParserPage";
import RelatedPlanSelector, {
  type RelatedPlanItem,
} from "@views/dashboards/farm/planSelector/RelatedPlanSelector";
import { useFarmHub } from "@/hooks/useFarmHub";
import {
  fertilizationPlanService,
  type FertilizationPlanDetail,
  type FertilizationPlanListItem,
} from "@/libs/api/services/fertilizationPlanService";
import { irrigationPlanService } from "@/libs/api/services/irrigationPlanService";

import CustomTextField from "@core/components/mui/TextField";

type FertilizationPlanRow = {
  id: string;
  planName: string;
  finalProduct: string;
  harvestTime: string;
  outputTon: number;
  fertilizerType: string;
  status: "active" | "draft";
  sourceLabel: string;
  growthStage: string;
};

const PAGE_SIZE = 10;

const formatDate = (value?: string | null) => {
  if (!value) return "—";

  try {
    return new Intl.DateTimeFormat("fa-IR", {
      year: "numeric",
      month: "2-digit",
      day: "2-digit",
    }).format(new Date(value));
  } catch {
    return value;
  }
};

const mapFertilizationPlanRow = (
  plan: FertilizationPlanListItem,
  detail?: FertilizationPlanDetail | null,
): FertilizationPlanRow => ({
  id: plan.plan_uuid,
  planName: plan.title,
  finalProduct: plan.plant_name || plan.crop_id || "—",
  harvestTime: formatDate(plan.created_at),
  outputTon: 0,
  fertilizerType: detail?.plan_payload?.items?.[0]?.name || plan.source_label || "—",
  status: plan.is_active ? "active" : "draft",
  sourceLabel: plan.source_label || "—",
  growthStage: plan.growth_stage || "—",
});

const FertilizationPlanPage = () => {
  const { getFarmUuid } = useFarmHub();
  const [plans, setPlans] = useState<FertilizationPlanRow[]>([]);
  const [minOutputTon, setMinOutputTon] = useState("0");
  const [selectedPlan, setSelectedPlan] = useState<FertilizationPlanRow | null>(null);
  const [detailsOpen, setDetailsOpen] = useState(false);
  const [loading, setLoading] = useState(false);
  const [detailsLoading, setDetailsLoading] = useState(false);
  const [actionLoadingId, setActionLoadingId] = useState<string | null>(null);
  const [error, setError] = useState<string | null>(null);
  const [relatedPlans, setRelatedPlans] = useState<RelatedPlanItem[]>([]);
  const [selectedRelatedPlanId, setSelectedRelatedPlanId] = useState<number | string | null>(
    null,
  );

  const filteredPlans = useMemo(() => {
    const minTon = Number(minOutputTon);

    return plans
      .filter((plan) => plan.outputTon >= minTon)
      .sort((firstPlan, secondPlan) => secondPlan.outputTon - firstPlan.outputTon);
  }, [minOutputTon, plans]);

  const loadPlans = useCallback(async () => {
    const farmUuid = getFarmUuid();

    if (!farmUuid) {
      setError("ابتدا مزرعه فعال را انتخاب کنید.");
      setPlans([]);
      setSelectedPlan(null);
      return;
    }

    setLoading(true);
    setError(null);

    try {
      const response = await fertilizationPlanService.getPlans(farmUuid, 1, PAGE_SIZE);
      const mappedPlans = response.data.map((plan) => mapFertilizationPlanRow(plan));

      setPlans(mappedPlans);
      setSelectedPlan((current) =>
        mappedPlans.find((plan) => plan.id === current?.id) ?? mappedPlans[0] ?? null,
      );
    } catch (loadError) {
      setError(
        loadError instanceof Error
          ? loadError.message
          : "دریافت لیست برنامه‌های کوددهی انجام نشد.",
      );
      setPlans([]);
      setSelectedPlan(null);
    } finally {
      setLoading(false);
    }
  }, [getFarmUuid]);

  useEffect(() => {
    loadPlans();
  }, [loadPlans]);

  const loadRelatedPlans = useCallback(async () => {
    const farmUuid = getFarmUuid();

    if (!farmUuid) {
      setRelatedPlans([]);
      setSelectedRelatedPlanId(null);
      return;
    }

    const response = await irrigationPlanService.getPlans(farmUuid, 1, PAGE_SIZE);
    const items: RelatedPlanItem[] = response.data.map((plan) => ({
      id: plan.plan_uuid,
      title: plan.title,
      finalProduct: plan.plant_name || plan.crop_id || "—",
      harvestTime: formatDate(plan.created_at),
      outputTon: 0,
      methodLabel: `منبع: ${plan.source_label || "—"}`,
      status: plan.is_active ? "active" : "draft",
    }));

    setRelatedPlans(items);
    setSelectedRelatedPlanId(items[0]?.id ?? null);
  }, [getFarmUuid]);

  const handleActivate = async (planId: string) => {
    setActionLoadingId(planId);

    try {
      await fertilizationPlanService.updatePlanStatus(planId, true);
      setPlans((currentPlans) =>
        currentPlans.map((plan) => ({
          ...plan,
          status: plan.id === planId ? "active" : "draft",
        })),
      );
      setSelectedPlan((currentPlan) =>
        currentPlan && currentPlan.id === planId
          ? { ...currentPlan, status: "active" }
          : currentPlan,
      );
    } catch (updateError) {
      setError(
        updateError instanceof Error
          ? updateError.message
          : "تغییر وضعیت برنامه کوددهی انجام نشد.",
      );
    } finally {
      setActionLoadingId(null);
    }
  };

  const handleDelete = async (planId: string) => {
    setActionLoadingId(planId);

    try {
      await fertilizationPlanService.deletePlan(planId);
      setPlans((currentPlans) => currentPlans.filter((plan) => plan.id !== planId));
      if (selectedPlan?.id === planId) {
        setSelectedPlan(null);
      }
    } catch (deleteError) {
      setError(
        deleteError instanceof Error
          ? deleteError.message
          : "حذف برنامه کوددهی انجام نشد.",
      );
    } finally {
      setActionLoadingId(null);
    }
  };

  const handleShowDetails = async (plan: FertilizationPlanRow) => {
    setSelectedPlan(plan);
    setDetailsOpen(true);
    setDetailsLoading(true);

    try {
      const detail = await fertilizationPlanService.getPlanDetail(plan.id);
      setSelectedPlan(mapFertilizationPlanRow(detail, detail));
      await loadRelatedPlans();
    } catch (detailError) {
      setError(
        detailError instanceof Error
          ? detailError.message
          : "دریافت جزئیات برنامه کوددهی انجام نشد.",
      );
      setDetailsOpen(false);
    } finally {
      setDetailsLoading(false);
    }
  };

  return (
    <>
      <Stack spacing={6}>
        <FertilizationPlanParserPage />

        <Card>
          <CardContent>
            <Stack spacing={4}>
              {loading ? <LinearProgress sx={{ borderRadius: 999 }} /> : null}
              {error ? <Alert severity="error">{error}</Alert> : null}

              <Stack
                direction={{ xs: "column", md: "row" }}
                spacing={3}
                alignItems={{ xs: "stretch", md: "center" }}
                justifyContent="space-between"
              >
                <Box>
                  <Typography variant="h5">لیست برنامه‌های کوددهی</Typography>
                  <Typography color="text.secondary">
                    لیست برنامه‌های کوددهی ثبت‌شده برای مزرعه فعال
                  </Typography>
                </Box>

                <CustomTextField
                  select
                  value={minOutputTon}
                  onChange={(event) => setMinOutputTon(event.target.value)}
                  label="فیلتر تن خروجی محصول"
                  sx={{ minWidth: { xs: "100%", md: 260 } }}
                  SelectProps={{ native: true }}
                >
                  <option value="0">همه برنامه‌ها</option>
                  <option value="30">بیشتر از ۳۰ تن</option>
                  <option value="40">بیشتر از ۴۰ تن</option>
                  <option value="50">بیشتر از ۵۰ تن</option>
                </CustomTextField>
              </Stack>

              <TableContainer>
                <Table>
                  <TableHead>
                    <TableRow>
                      <TableCell>نام برنامه</TableCell>
                      <TableCell>محصول نهایی</TableCell>
                      <TableCell>تاریخ ایجاد</TableCell>
                      <TableCell>مرحله رشد</TableCell>
                      <TableCell>نوع کود / منبع</TableCell>
                      <TableCell>وضعیت</TableCell>
                      <TableCell align="center">عملیات</TableCell>
                    </TableRow>
                  </TableHead>
                  <TableBody>
                    {filteredPlans.map((plan) => (
                      <TableRow hover key={plan.id}>
                        <TableCell>{plan.planName}</TableCell>
                        <TableCell>{plan.finalProduct}</TableCell>
                        <TableCell>{plan.harvestTime}</TableCell>
                        <TableCell>{plan.growthStage}</TableCell>
                        <TableCell>{plan.fertilizerType}</TableCell>
                        <TableCell>
                          <Chip
                            size="small"
                            label={plan.status === "active" ? "فعال" : "پیش‌نویس"}
                            color={plan.status === "active" ? "success" : "default"}
                            variant={plan.status === "active" ? "filled" : "tonal"}
                          />
                        </TableCell>
                        <TableCell align="center">
                          <Stack direction="row" spacing={1} justifyContent="center">
                            <Tooltip title="فعال‌سازی برنامه">
                              <span>
                                <IconButton
                                  color="success"
                                  onClick={() => handleActivate(plan.id)}
                                  disabled={plan.status === "active" || actionLoadingId === plan.id}
                                >
                                  <i className="tabler-player-play text-[20px]" />
                                </IconButton>
                              </span>
                            </Tooltip>

                            <Tooltip title="مشاهده جزئیات">
                              <IconButton
                                color="primary"
                                onClick={() => handleShowDetails(plan)}
                              >
                                <i className="tabler-eye text-[20px]" />
                              </IconButton>
                            </Tooltip>

                            <Tooltip title="حذف برنامه">
                              <IconButton
                                color="error"
                                onClick={() => handleDelete(plan.id)}
                                disabled={actionLoadingId === plan.id}
                              >
                                <i className="tabler-trash text-[20px]" />
                              </IconButton>
                            </Tooltip>
                          </Stack>
                        </TableCell>
                      </TableRow>
                    ))}

                    {filteredPlans.length === 0 ? (
                      <TableRow>
                        <TableCell colSpan={7}>
                          <Alert severity="info">
                            برنامه‌ای با این فیلتر پیدا نشد.
                          </Alert>
                        </TableCell>
                      </TableRow>
                    ) : null}
                  </TableBody>
                </Table>
              </TableContainer>

              <Divider />

              <Stack spacing={2}>
                <Typography variant="h6">جزئیات برنامه انتخاب‌شده</Typography>

                {selectedPlan ? (
                  <Stack
                    direction={{ xs: "column", md: "row" }}
                    spacing={2}
                    useFlexGap
                    flexWrap="wrap"
                  >
                    <Chip label={`محصول نهایی: ${selectedPlan.finalProduct}`} variant="tonal" />
                    <Chip label={`تاریخ ایجاد: ${selectedPlan.harvestTime}`} variant="tonal" />
                    <Chip label={`مرحله رشد: ${selectedPlan.growthStage}`} variant="tonal" />
                    <Chip label={`نوع کود: ${selectedPlan.fertilizerType}`} variant="tonal" />
                  </Stack>
                ) : (
                  <Alert severity="warning">
                    برای دیدن جزئیات، یکی از برنامه‌های کوددهی را انتخاب کنید.
                  </Alert>
                )}
              </Stack>
            </Stack>
          </CardContent>
        </Card>
      </Stack>

      {detailsLoading ? <LinearProgress sx={{ borderRadius: 999, mt: 2 }} /> : null}

      {selectedPlan ? (
        <RelatedPlanSelector
          open={detailsOpen}
          onClose={() => setDetailsOpen(false)}
          title="جزییات برنامه کوددهی"
          description="برای تکمیل اجرای این برنامه کوددهی، یکی از برنامه‌های آبیاری مرتبط را انتخاب کنید."
          currentPlanName={selectedPlan.planName}
          currentPlanStatus={selectedPlan.status === "active" ? "برنامه فعال" : "آماده برای فعال‌سازی"}
          currentPlanOutput={`منبع: ${selectedPlan.sourceLabel}`}
          summaryItems={[
            { label: "محصول نهایی", value: selectedPlan.finalProduct },
            { label: "تاریخ ایجاد", value: selectedPlan.harvestTime },
            { label: "جزئیات", value: selectedPlan.fertilizerType },
          ]}
          relatedTitle="برنامه‌های آبیاری پیشنهادی"
          relatedDescription="از بین برنامه‌های زیر، مناسب‌ترین برنامه آبیاری را برای این برنامه کوددهی انتخاب کنید."
          relatedPlans={relatedPlans}
          selectedRelatedPlanId={selectedRelatedPlanId}
          onSelectRelatedPlan={(planId) => setSelectedRelatedPlanId(planId)}
          onConfirm={() => setDetailsOpen(false)}
        />
      ) : null}
    </>
  );
};

export default FertilizationPlanPage;