import { DollarOutlined, HighlightOutlined, InboxOutlined, DatabaseOutlined, UserOutlined, RiseOutlined } from "@ant-design/icons";
import { useList, useTranslate } from "@refinedev/core";
import { useQuery } from "@tanstack/react-query";
import { Card, Col, Row, Statistic, theme } from "antd";
import { useMemo } from "react";
import { Link } from "react-router";
import { IFilament } from "../../filaments/model";
import { ISpool } from "../../spools/model";
import { IVendor } from "../../vendors/model";
import { useCurrencyFormatter } from "../../../utils/settings";
import { getAPIURL } from "../../../utils/url";

const { useToken } = theme;

export function QuickStats() {
  const t = useTranslate();
  const { token } = useToken();
  const currencyFormatter = useCurrencyFormatter();

  const { result: filamentsResult, query: filamentsQuery } = useList<IFilament>({
    resource: "filament",
    pagination: { pageSize: 1 },
  });

  const { result: vendorsResult, query: vendorsQuery } = useList<IVendor>({
    resource: "vendor",
    pagination: { pageSize: 1 },
  });

  // Fetch all spools for total weight calculation
  const { result: spoolsResult, query: spoolsQuery } = useList<ISpool>({
    resource: "spool",
    pagination: { pageSize: 1000 },
    meta: {
      queryParams: {
        allow_archived: false,
      },
    },
  });

  // Calculate total remaining weight
  const totalWeight = useMemo(() => {
    const data = spoolsResult?.data || [];
    return data.reduce((sum, spool) => sum + (spool.remaining_weight ?? 0), 0);
  }, [spoolsResult?.data]);

  // Calculate total inventory value
  const totalValue = useMemo(() => {
    const data = spoolsResult?.data || [];
    return data.reduce((sum, spool) => sum + (spool.remaining_value ?? 0), 0);
  }, [spoolsResult?.data]);

  // Fetch cost stats from backend
  const { data: costStats, isLoading: costLoading } = useQuery<{
    total_spent: number;
    total_weight_purchased: number;
    avg_cost_per_kg: number | null;
  }>({
    queryKey: ["analytics", "cost"],
    queryFn: async () => {
      const res = await fetch(`${getAPIURL()}/analytics/cost`);
      return res.json();
    },
  });

  const formatWeight = (grams: number) => {
    if (grams >= 1000) {
      return `${(grams / 1000).toFixed(1)} kg`;
    }
    return `${Math.round(grams)} g`;
  };

  return (
    <Row gutter={[12, 12]} style={{ marginTop: 16 }}>
      <Col xs={12} md={8} lg={4}>
        <Link to="/spool">
          <Card hoverable size="small">
            <Statistic
              title={t("home.quick_stats.total_spools")}
              value={spoolsResult?.total ?? 0}
              loading={spoolsQuery.isLoading}
              prefix={<InboxOutlined />}
            />
          </Card>
        </Link>
      </Col>
      <Col xs={12} md={8} lg={4}>
        <Link to="/filament">
          <Card hoverable size="small">
            <Statistic
              title={t("home.quick_stats.total_filaments")}
              value={filamentsResult?.total ?? 0}
              loading={filamentsQuery.isLoading}
              prefix={<HighlightOutlined />}
            />
          </Card>
        </Link>
      </Col>
      <Col xs={12} md={8} lg={4}>
        <Link to="/vendor">
          <Card hoverable size="small">
            <Statistic
              title={t("home.quick_stats.total_vendors")}
              value={vendorsResult?.total ?? 0}
              loading={vendorsQuery.isLoading}
              prefix={<UserOutlined />}
            />
          </Card>
        </Link>
      </Col>
      <Col xs={12} md={12} lg={6}>
        <Card size="small">
          <Statistic
            title={t("home.quick_stats.total_weight")}
            value={formatWeight(totalWeight)}
            loading={spoolsQuery.isLoading}
            prefix={<DatabaseOutlined />}
          />
        </Card>
      </Col>
      <Col xs={12} md={12} lg={6}>
        <Card size="small">
          <Statistic
            title={t("home.quick_stats.total_value")}
            value={currencyFormatter.format(totalValue)}
            loading={spoolsQuery.isLoading}
            prefix={<DollarOutlined />}
          />
        </Card>
      </Col>
      <Col xs={12} md={12} lg={6}>
        <Card size="small">
          <Statistic
            title={t("home.quick_stats.total_spent")}
            value={currencyFormatter.format(costStats?.total_spent ?? 0)}
            loading={costLoading}
            prefix={<DollarOutlined />}
          />
        </Card>
      </Col>
      <Col xs={12} md={12} lg={6}>
        <Card size="small">
          <Statistic
            title={t("home.quick_stats.avg_cost_per_kg")}
            value={costStats?.avg_cost_per_kg != null ? currencyFormatter.format(costStats.avg_cost_per_kg) : "-"}
            loading={costLoading}
            prefix={<RiseOutlined />}
          />
        </Card>
      </Col>
    </Row>
  );
}