"use client";

import React from "react";
import {
  Box,
  Card,
  CardContent,
  Grid,
  Typography,
} from "@mui/material";
import Inventory2OutlinedIcon from "@mui/icons-material/Inventory2Outlined";
import MonetizationOnOutlinedIcon from "@mui/icons-material/MonetizationOnOutlined";
import LayersOutlinedIcon from "@mui/icons-material/LayersOutlined";
import SearchOutlinedIcon from "@mui/icons-material/SearchOutlined";
import LocalShippingOutlinedIcon from "@mui/icons-material/LocalShippingOutlined";
import OutboundOutlinedIcon from "@mui/icons-material/OutboundOutlined";
import BarChartOutlinedIcon from "@mui/icons-material/BarChartOutlined";
import PieChartOutlineOutlinedIcon from "@mui/icons-material/PieChartOutlineOutlined";
import type { SvgIconComponent } from "@mui/icons-material";
import { REPORTS } from "@/config/reportConfig";
import { REPORT_CATEGORIES, type ReportCategoryConfig } from "./reportCategories";

const REPORT_ICON_MAP: Record<string, SvgIconComponent> = {
  "rep-011": Inventory2OutlinedIcon,
  "rep-007": MonetizationOnOutlinedIcon,
  "rep-012": LayersOutlinedIcon,
  "rep-010": SearchOutlinedIcon,
  "rep-004": LocalShippingOutlinedIcon,
  "rep-014": LocalShippingOutlinedIcon,
  "rep-008": OutboundOutlinedIcon,
  "rep-009": OutboundOutlinedIcon,
  "rep-013": LocalShippingOutlinedIcon,
  "rep-006": BarChartOutlinedIcon,
  "rep-005": PieChartOutlineOutlinedIcon,
  "rep-015": LayersOutlinedIcon,
};

const reportById = Object.fromEntries(REPORTS.map((r) => [r.id, r]));

interface ReportSelectionDashboardProps {
  selectedReportId: string;
  onSelectReport: (reportId: string) => void;
}

function ReportCard({
  reportId,
  title,
  accent,
  selected,
  onClick,
}: {
  reportId: string;
  title: string;
  accent: string;
  selected: boolean;
  onClick: () => void;
}) {
  const Icon = REPORT_ICON_MAP[reportId] ?? Inventory2OutlinedIcon;

  return (
    <Box
      component="button"
      type="button"
      onClick={onClick}
      sx={{
        display: "flex",
        alignItems: "center",
        gap: 1.5,
        width: "100%",
        p: 1.5,
        textAlign: "left",
        cursor: "pointer",
        border: "1px solid",
        borderColor: selected ? accent : "divider",
        borderRadius: 1.5,
        bgcolor: "background.paper",
        boxShadow: selected ? 2 : "0 1px 3px rgba(0,0,0,0.06)",
        transition: "border-color 0.15s, box-shadow 0.15s",
        "&:hover": {
          borderColor: accent,
          boxShadow: 2,
        },
      }}
    >
      <Box
        sx={{
          display: "flex",
          alignItems: "center",
          justifyContent: "center",
          width: 40,
          height: 40,
          borderRadius: 1,
          bgcolor: `${accent}18`,
          color: accent,
          flexShrink: 0,
        }}
      >
        <Icon fontSize="small" />
      </Box>
      <Typography variant="body2" fontWeight={selected ? 600 : 400} sx={{ lineHeight: 1.35 }}>
        {title}
      </Typography>
    </Box>
  );
}

function CategoryColumn({
  category,
  selectedReportId,
  onSelectReport,
}: {
  category: ReportCategoryConfig;
  selectedReportId: string;
  onSelectReport: (reportId: string) => void;
}) {
  const reports = category.reportIds
    .map((id) => reportById[id])
    .filter(Boolean);

  return (
    <Box
      sx={{
        display: "flex",
        flexDirection: "column",
        height: "100%",
        borderRadius: 1.5,
        overflow: "hidden",
        border: "1px solid",
        borderColor: "divider",
      }}
    >
      <Box
        sx={{
          px: 2,
          py: 1.25,
          bgcolor: category.headerBg,
        }}
      >
        <Typography variant="subtitle1" fontWeight="bold">
          {category.title}
        </Typography>
      </Box>
      <Box
        sx={{
          flex: 1,
          p: 1.5,
          bgcolor: category.bodyBg,
        }}
      >
        <Grid container spacing={1.5}>
          {reports.map((report) => (
            <Grid item xs={6} key={report.id}>
              <ReportCard
                reportId={report.id}
                title={report.title}
                accent={category.accent}
                selected={selectedReportId === report.id}
                onClick={() => onSelectReport(report.id)}
              />
            </Grid>
          ))}
        </Grid>
      </Box>
    </Box>
  );
}

export default function ReportSelectionDashboard({
  selectedReportId,
  onSelectReport,
}: ReportSelectionDashboardProps) {
  return (
    <Card sx={{ mb: 4, boxShadow: 2, border: "1px solid", borderColor: "divider" }}>
      <CardContent sx={{ p: { xs: 2, sm: 3 } }}>
        <Grid container spacing={2}>
          {REPORT_CATEGORIES.map((category) => (
            <Grid item xs={12} md={4} key={category.id}>
              <CategoryColumn
                category={category}
                selectedReportId={selectedReportId}
                onSelectReport={onSelectReport}
              />
            </Grid>
          ))}
        </Grid>
      </CardContent>
    </Card>
  );
}
