import React from 'react';
import { IntelligenceItem, University1415Dimension, JobEntity } from '../types/futures';
import { PageHeader } from '../components/common/PageHeader';
import { toPersianDigits, getHorizonLabelFa } from '../utils/persianNumbers';
import { CATEGORY_META, CATEGORY_ORDER } from '../utils/categories';
import { HORIZON_START, HORIZON_END } from '../utils/horizon';

import { Card } from '@/components/ui/card';
import { Button } from '@/components/ui/button';
import {
  Table,
  TableBody,
  TableCell,
  TableHead,
  TableHeader,
  TableRow
} from '@/components/ui/table';
import { Printer } from 'lucide-react';

interface ReportsPageProps {
  items: IntelligenceItem[];
  dimensions: University1415Dimension[];
  jobs: JobEntity[];
}

export const ReportsPage: React.FC<ReportsPageProps> = ({ items, dimensions, jobs }) => {
  const criticalItems = items.filter(
    (i) => i.status === 'critical' || i.impactScore === 5
  );
  const byGap = [...dimensions].sort((a, b) => b.gap - a.gap);

  const avgReadiness = dimensions.length
    ? Math.round(
        dimensions.reduce((acc, d) => acc + d.readinessPercentage, 0) / dimensions.length
      )
    : 0;

  const growingJobs = jobs.filter((j) => j.type === 'growing').length;

  return (
    <div className="mx-auto max-w-5xl animate-in fade-in duration-300">
      <div className="no-print">
        <PageHeader
          title="گزارش‌ها"
          description="خلاصه وضعیت رصد و شکاف‌ها، آماده چاپ."
          actions={
            <Button size="sm" onClick={() => window.print()}>
              <Printer />
              چاپ
            </Button>
          }
        />
      </div>

      <Card data-card className="p-6 sm:p-8">
        {/* Document header */}
        <header className="mb-6 border-b pb-5">
          <h2 className="text-lg font-bold">
            رادار آینده دانشگاه اصفهان — گزارش وضعیت
          </h2>
          <p className="tnum mt-1 text-[12px] text-muted-foreground">
            افق راهبردی {toPersianDigits(HORIZON_START)} تا {toPersianDigits(HORIZON_END)}
          </p>
        </header>

        {/* Figures, all derived from the dataset. */}
        <section className="mb-7">
          <SectionTitle>در یک نگاه</SectionTitle>
          <div className="grid grid-cols-2 gap-3 sm:grid-cols-4">
            <Figure label="موارد رصدشده" value={toPersianDigits(items.length)} />
            <Figure label="موارد بحرانی" value={toPersianDigits(criticalItems.length)} />
            <Figure label="آمادگی ۱۴۱۵" value={`${toPersianDigits(avgReadiness)}٪`} />
            <Figure label="مشاغل رو به رشد" value={toPersianDigits(growingJobs)} />
          </div>

          <div className="mt-3 grid grid-cols-2 gap-3 sm:grid-cols-4">
            {CATEGORY_ORDER.map((cat) => {
              const meta = CATEGORY_META[cat];
              const count = items.filter((i) => i.category === cat).length;
              return (
                <div key={cat} className="rounded-lg border p-3">
                  <div className="flex items-center gap-1.5 text-[11.5px] text-muted-foreground">
                    <span className="cat-dot" style={{ background: meta.color }} />
                    {meta.label}
                  </div>
                  <div className="kpi-number mt-1 text-lg font-bold">
                    {toPersianDigits(count)}
                  </div>
                </div>
              );
            })}
          </div>
        </section>

        {/* Critical items */}
        {criticalItems.length > 0 && (
          <section className="mb-7">
            <SectionTitle>مواردی که نیازمند تصمیم‌اند</SectionTitle>
            <div className="overflow-x-auto rounded-lg border">
              <Table>
                <TableHeader>
                  <TableRow>
                    <TableHead className="text-right">عنوان</TableHead>
                    <TableHead className="text-right">دسته</TableHead>
                    <TableHead className="text-right">افق</TableHead>
                    <TableHead className="text-right">اثر</TableHead>
                    <TableHead className="text-right">پیامد</TableHead>
                  </TableRow>
                </TableHeader>
                <TableBody>
                  {criticalItems.map((item) => (
                    <TableRow key={item.id}>
                      <TableCell className="font-semibold">{item.title}</TableCell>
                      <TableCell className="whitespace-nowrap text-muted-foreground">
                        {CATEGORY_META[item.category].label}
                      </TableCell>
                      <TableCell className="whitespace-nowrap text-muted-foreground">
                        {getHorizonLabelFa(item.horizon)}
                      </TableCell>
                      <TableCell className="tnum font-semibold">
                        {toPersianDigits(item.impactScore)}/۵
                      </TableCell>
                      <TableCell className="max-w-sm text-muted-foreground">
                        {item.whyItMatters}
                      </TableCell>
                    </TableRow>
                  ))}
                </TableBody>
              </Table>
            </div>
          </section>
        )}

        {/* Gap matrix */}
        <section>
          <SectionTitle>شکاف ویژگی‌های {toPersianDigits(HORIZON_END)}</SectionTitle>
          <div className="grid grid-cols-1 gap-2.5 md:grid-cols-2">
            {byGap.map((dim) => (
              <div key={dim.id} className="rounded-lg border p-3.5">
                <div className="mb-1.5 flex items-center justify-between gap-2">
                  <span className="text-[12.5px] font-semibold">{dim.title}</span>
                  <span
                    className="tnum shrink-0 rounded px-1.5 py-0.5 text-[11px] font-semibold"
                    style={{
                      background: 'var(--negative-soft)',
                      color: 'var(--negative)'
                    }}
                  >
                    شکاف {toPersianDigits(dim.gap)}
                  </span>
                </div>

                <div className="tnum flex items-center justify-between gap-2 text-[11px] text-muted-foreground">
                  <span>موجود {toPersianDigits(dim.currentScore)}/۱۰</span>
                  <span>هدف {toPersianDigits(dim.targetScore)}/۱۰</span>
                  <span>{toPersianDigits(dim.readinessPercentage)}٪ آمادگی</span>
                </div>

                {dim.strategicRecommendations[0] && (
                  <p className="mt-2 border-t pt-2 text-[11.5px] leading-relaxed text-muted-foreground">
                    <span className="font-semibold text-foreground">اقدام پیشنهادی: </span>
                    {dim.strategicRecommendations[0]}
                  </p>
                )}
              </div>
            ))}
          </div>
        </section>
      </Card>
    </div>
  );
};

const SectionTitle: React.FC<{ children: React.ReactNode }> = ({ children }) => (
  <h3 className="mb-3 text-[14px] font-bold">{children}</h3>
);

const Figure: React.FC<{ label: string; value: string }> = ({ label, value }) => (
  <div className="rounded-lg border p-3">
    <div className="text-[11.5px] text-muted-foreground">{label}</div>
    <div className="kpi-number mt-1 text-xl font-bold">{value}</div>
  </div>
);