import { Fragment } from "react";
import { ChevronDown, ChevronUp, FileSpreadsheet, FileText } from "lucide-react";

import type { BreakdownRow, DayDetailsResponse, TableReportResponse } from "../../api/reports";
import { useTranslation } from "../../hooks/useTranslation";

const toPersianDigits = (value: string) =>
  value.replace(/\d/g, (digit) => "۰۱۲۳۴۵۶۷۸۹"[Number(digit)] || digit);

const localizeDigits = (value: string, lang: "en" | "fa") => (lang === "fa" ? toPersianDigits(value) : value);

const formatAmount = (value: string, lang: "en" | "fa") => {
  const trimmed = value.trim();
  if (!trimmed) return trimmed;
  const numeric = Number(trimmed.replace(/,/g, ""));
  if (Number.isNaN(numeric)) return localizeDigits(trimmed, lang);

  const [integerPart, fractionalPart] = trimmed.replace(/,/g, "").split(".");
  const grouped = Math.abs(Number(integerPart)).toLocaleString("en-US");
  const signed = trimmed.startsWith("-") ? `-${grouped}` : grouped;
  const normalized = fractionalPart ? `${signed}.${fractionalPart}` : signed;
  return localizeDigits(normalized, lang);
};

const currencyLabel = (currency: string, lang: "en" | "fa") => {
  const normalized = currency.toUpperCase();
  if (lang !== "fa") return normalized;
  return (
    {
      USD: "دلار آمریکا",
      EUR: "یورو",
      GBP: "پوند",
      IRR: "ریال",
      IRT: "تومان",
      AED: "درهم",
      TRY: "لیر",
    }[normalized] || normalized
  );
};

const formatMoneyTotals = (totals: { currency: string; amount: string }[], lang: "en" | "fa") => {
  if (!totals.length) return "-";
  return totals.map((item) => `${formatAmount(item.amount, lang)} ${currencyLabel(item.currency, lang)}`).join(" | ");
};

const formatHourlyRate = (
  rate: { currency: string; amount: string } | null,
  lang: "en" | "fa",
) => {
  if (!rate) return "-";
  return `${formatAmount(rate.amount, lang)} ${currencyLabel(rate.currency, lang)}`;
};

const formatDisplayDate = (value: string, lang: "en" | "fa") => {
  const parsed = new Date(`${value}T00:00:00`);
  return new Intl.DateTimeFormat(lang === "fa" ? "fa-IR" : "en-US", {
    dateStyle: "medium",
  }).format(parsed);
};

const formatDisplayDateTime = (value: string, lang: "en" | "fa") => {
  const parsed = new Date(value);
  return new Intl.DateTimeFormat(lang === "fa" ? "fa-IR" : "en-US", {
    dateStyle: "medium",
    timeStyle: "short",
  }).format(parsed);
};

function BreakdownCards({
  title,
  rows,
  labels,
  lang,
}: {
  title: string;
  rows: BreakdownRow[];
  labels: Record<string, string>;
  lang: "en" | "fa";
}) {
  return (
    <div className="rounded-3xl border border-slate-200 bg-white p-4 shadow-sm dark:border-slate-800 dark:bg-slate-900 sm:p-5">
      <div className="mb-4 text-sm font-semibold text-slate-900 dark:text-white">{title}</div>

      <div className="space-y-3 sm:hidden">
        {rows.map((row) => (
          <div key={row.id} className="rounded-2xl border border-slate-200 bg-slate-50/80 p-3 dark:border-slate-800 dark:bg-slate-950/70">
            <div className="text-sm font-semibold text-slate-900 dark:text-white">{row.name}</div>
            <div className="mt-3 grid grid-cols-2 gap-3 text-xs text-slate-600 dark:text-slate-300">
              <div>
                <div className="mb-1 text-[11px] uppercase tracking-[0.12em] text-slate-400 dark:text-slate-500">{labels.billableHours}</div>
                <div className="font-medium">{localizeDigits(row.billable_duration, lang)}</div>
              </div>
              <div>
                <div className="mb-1 text-[11px] uppercase tracking-[0.12em] text-slate-400 dark:text-slate-500">{labels.nonBillableHours}</div>
                <div className="font-medium">{localizeDigits(row.non_billable_duration, lang)}</div>
              </div>
              <div>
                <div className="mb-1 text-[11px] uppercase tracking-[0.12em] text-slate-400 dark:text-slate-500">{labels.totalIncome}</div>
                <div className="font-medium">{formatMoneyTotals(row.income_totals, lang)}</div>
              </div>
            </div>
          </div>
        ))}
      </div>

      <div className="hidden overflow-x-auto sm:block">
        <table className="min-w-full text-sm">
          <thead>
            <tr className="border-b border-slate-200 text-slate-500 dark:border-slate-800 dark:text-slate-400">
              <th className="px-3 py-3 text-start font-medium">{labels.name}</th>
              <th className="px-3 py-3 text-start font-medium">{labels.billableHours}</th>
              <th className="px-3 py-3 text-start font-medium">{labels.nonBillableHours}</th>
              <th className="px-3 py-3 text-start font-medium">{labels.totalIncome}</th>
            </tr>
          </thead>
          <tbody>
            {rows.map((row) => (
              <tr key={row.id} className="border-b border-slate-100 last:border-b-0 dark:border-slate-800/80">
                <td className="px-3 py-3 font-medium text-slate-900 dark:text-slate-100">{row.name}</td>
                <td className="px-3 py-3 text-slate-700 dark:text-slate-300">{localizeDigits(row.billable_duration, lang)}</td>
                <td className="px-3 py-3 text-slate-700 dark:text-slate-300">{localizeDigits(row.non_billable_duration, lang)}</td>
                <td className="px-3 py-3 text-slate-700 dark:text-slate-300">{formatMoneyTotals(row.income_totals, lang)}</td>
              </tr>
            ))}
          </tbody>
        </table>
      </div>
    </div>
  );
}

export function ReportsTablePanel({
  data,
  dayDetails,
  openDay,
  onToggleDay,
  onExport,
  exportState,
  labels,
}: {
  data: TableReportResponse | null;
  dayDetails: DayDetailsResponse | null;
  openDay: string | null;
  onToggleDay: (day: string) => void;
  onExport: (type: "excel" | "pdf") => void;
  exportState: {
    excel: { pending: boolean; cooldownSeconds: number };
    pdf: { pending: boolean; cooldownSeconds: number };
  };
  labels: Record<string, string>;
}) {
  const { lang } = useTranslation();

  if (!data) return null;

  const days = Array.isArray(data.days) ? data.days : [];
  const clients = Array.isArray(data.clients) ? data.clients : [];
  const projects = Array.isArray(data.projects) ? data.projects : [];
  const tags = Array.isArray(data.tags) ? data.tags : [];
  const entries = Array.isArray(dayDetails?.entries) ? dayDetails.entries : [];
  const summary = data.summary ?? {
    billable_duration: "00:00:00",
    non_billable_duration: "00:00:00",
    income_totals: [],
  };

  return (
    <div className="space-y-4">
      <div className="flex flex-col gap-2 sm:flex-row sm:justify-end">
        <button
          type="button"
          onClick={() => onExport("excel")}
          disabled={exportState.excel.pending || exportState.excel.cooldownSeconds > 0}
          className="inline-flex h-11 items-center justify-center gap-2 rounded-2xl border border-emerald-200 bg-emerald-50 px-4 text-sm font-medium text-emerald-700 transition hover:bg-emerald-100 disabled:cursor-not-allowed disabled:opacity-60 dark:border-emerald-500/30 dark:bg-emerald-500/10 dark:text-emerald-300"
        >
          <FileSpreadsheet className="h-4 w-4" />
          {exportState.excel.pending
            ? labels.exportExcel
            : exportState.excel.cooldownSeconds > 0
            ? `${labels.exportExcel} (${localizeDigits(String(exportState.excel.cooldownSeconds), lang)})`
            : labels.exportExcel}
        </button>
        <button
          type="button"
          onClick={() => onExport("pdf")}
          disabled={exportState.pdf.pending || exportState.pdf.cooldownSeconds > 0}
          className="inline-flex h-11 items-center justify-center gap-2 rounded-2xl border border-rose-200 bg-rose-50 px-4 text-sm font-medium text-rose-700 transition hover:bg-rose-100 disabled:cursor-not-allowed disabled:opacity-60 dark:border-rose-500/30 dark:bg-rose-500/10 dark:text-rose-300"
        >
          <FileText className="h-4 w-4" />
          {exportState.pdf.pending
            ? labels.exportPdf
            : exportState.pdf.cooldownSeconds > 0
            ? `${labels.exportPdf} (${localizeDigits(String(exportState.pdf.cooldownSeconds), lang)})`
            : labels.exportPdf}
        </button>
      </div>

      <div className="rounded-3xl border border-slate-200 bg-white p-4 shadow-sm dark:border-slate-800 dark:bg-slate-900 sm:p-5">
        <div className="mb-4 text-sm font-semibold text-slate-900 dark:text-white">{labels.details}</div>

        <div className="space-y-3 sm:hidden">
          {days.map((day) => {
            const isOpen = openDay === day.date;
            return (
              <div key={day.date} className="rounded-2xl border border-slate-200 bg-slate-50/80 p-3 dark:border-slate-800 dark:bg-slate-950/70">
                <div className="flex items-start justify-between gap-3">
                  <div>
                    <div className="text-sm font-semibold text-slate-900 dark:text-white">{formatDisplayDate(day.date, lang)}</div>
                    <div className="mt-1 text-xs text-slate-500 dark:text-slate-400">
                      {labels.totalHours}: {localizeDigits(day.total_duration, lang)}
                    </div>
                  </div>
                  <button
                    type="button"
                    onClick={() => onToggleDay(day.date)}
                    className="inline-flex h-9 w-9 items-center justify-center rounded-xl border border-slate-200 bg-white text-slate-500 transition hover:bg-slate-100 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-300 dark:hover:bg-slate-800"
                  >
                    {isOpen ? <ChevronUp className="h-4 w-4" /> : <ChevronDown className="h-4 w-4" />}
                  </button>
                </div>

                <div className="mt-3 grid grid-cols-2 gap-3 text-xs text-slate-600 dark:text-slate-300">
                  <div>
                    <div className="mb-1 text-[11px] uppercase tracking-[0.12em] text-slate-400 dark:text-slate-500">{labels.billableHours}</div>
                    <div className="font-medium">{localizeDigits(day.billable_duration, lang)}</div>
                  </div>
                  <div>
                    <div className="mb-1 text-[11px] uppercase tracking-[0.12em] text-slate-400 dark:text-slate-500">{labels.nonBillableHours}</div>
                    <div className="font-medium">{localizeDigits(day.non_billable_duration, lang)}</div>
                  </div>
                  <div>
                    <div className="mb-1 text-[11px] uppercase tracking-[0.12em] text-slate-400 dark:text-slate-500">{labels.hourlyRate}</div>
                    <div className="font-medium">{formatHourlyRate(day.latest_hourly_rate, lang)}</div>
                  </div>
                  <div className="col-span-2">
                    <div className="mb-1 text-[11px] uppercase tracking-[0.12em] text-slate-400 dark:text-slate-500">{labels.totalIncome}</div>
                    <div className="font-medium">{formatMoneyTotals(day.income_totals, lang)}</div>
                  </div>
                </div>

                {isOpen && dayDetails?.day === day.date ? (
                  <div className="mt-3 space-y-2 border-t border-slate-200 pt-3 dark:border-slate-800">
                    {entries.map((entry) => (
                      <div key={entry.id} className="rounded-xl border border-slate-200 bg-white p-3 dark:border-slate-700 dark:bg-slate-900">
                        <div className="text-sm font-medium text-slate-900 dark:text-slate-100">
                          {entry.description || labels.noDescription}
                        </div>
                        <div className="mt-1 text-xs text-slate-500 dark:text-slate-400">
                          {entry.project?.name || "-"} • {localizeDigits(entry.duration, lang)}
                        </div>
                        <div className="mt-2 text-xs text-slate-500 dark:text-slate-400">{formatDisplayDateTime(entry.start_time, lang)}</div>
                      </div>
                    ))}
                  </div>
                ) : null}
              </div>
            );
          })}

          <div className="rounded-2xl border border-sky-200 bg-sky-50 p-3 dark:border-sky-500/20 dark:bg-sky-500/10">
            <div className="text-sm font-semibold text-slate-900 dark:text-white">{labels.total}</div>
            <div className="mt-3 grid grid-cols-2 gap-3 text-xs text-slate-700 dark:text-slate-300">
              <div>{labels.billableHours}: {localizeDigits(summary.billable_duration, lang)}</div>
              <div>{labels.nonBillableHours}: {localizeDigits(summary.non_billable_duration, lang)}</div>
              <div>{labels.totalIncome}: {formatMoneyTotals(summary.income_totals, lang)}</div>
            </div>
          </div>
        </div>

        <div className="hidden overflow-x-auto sm:block">
          <table className="min-w-[860px] w-full text-sm">
            <thead>
              <tr className="border-b border-slate-200 text-slate-500 dark:border-slate-800 dark:text-slate-400">
                <th className="w-[18%] px-3 py-3 text-start font-medium">{labels.date}</th>
                <th className="w-[14%] px-3 py-3 text-start font-medium">{labels.billableHours}</th>
                <th className="w-[14%] px-3 py-3 text-start font-medium">{labels.nonBillableHours}</th>
                <th className="w-[18%] px-3 py-3 text-start font-medium">{labels.hourlyRate}</th>
                <th className="w-[26%] px-3 py-3 text-start font-medium">{labels.totalIncome}</th>
                <th className="w-[10%] px-3 py-3 text-start font-medium">{labels.details}</th>
              </tr>
            </thead>
            <tbody>
              {days.map((day) => {
                const isOpen = openDay === day.date;
                return (
                  <Fragment key={day.date}>
                    <tr className="border-b border-slate-100 dark:border-slate-800/80">
                      <td className="px-3 py-3 font-medium text-slate-900 dark:text-slate-100">{formatDisplayDate(day.date, lang)}</td>
                      <td className="px-3 py-3 text-slate-700 dark:text-slate-300">{localizeDigits(day.billable_duration, lang)}</td>
                      <td className="px-3 py-3 text-slate-700 dark:text-slate-300">{localizeDigits(day.non_billable_duration, lang)}</td>
                      <td className="px-3 py-3 text-slate-700 dark:text-slate-300">{formatHourlyRate(day.latest_hourly_rate, lang)}</td>
                      <td className="px-3 py-3 text-slate-700 dark:text-slate-300">{formatMoneyTotals(day.income_totals, lang)}</td>
                      <td className="px-3 py-3">
                        <button
                          type="button"
                          onClick={() => onToggleDay(day.date)}
                          className="inline-flex h-9 w-9 items-center justify-center rounded-xl border border-slate-200 bg-white text-slate-500 transition hover:bg-slate-50 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-300 dark:hover:bg-slate-800"
                        >
                          {isOpen ? <ChevronUp className="h-4 w-4" /> : <ChevronDown className="h-4 w-4" />}
                        </button>
                      </td>
                    </tr>
                    {isOpen && dayDetails?.day === day.date ? (
                      <tr className="border-b border-slate-100 bg-slate-50/70 dark:border-slate-800/80 dark:bg-slate-950/70">
                        <td colSpan={6} className="px-3 py-4">
                          <div className="space-y-2">
                            {entries.map((entry) => (
                              <div key={entry.id} className="rounded-2xl border border-slate-200 bg-white px-4 py-3 dark:border-slate-700 dark:bg-slate-900">
                                <div className="flex flex-wrap items-center gap-2 text-sm">
                                  <span className="font-medium text-slate-900 dark:text-slate-100">{entry.description || labels.noDescription}</span>
                                  {entry.project ? <span className="text-sky-600 dark:text-sky-300">{entry.project.name}</span> : null}
                                  <span className="text-slate-500 dark:text-slate-400">{localizeDigits(entry.duration, lang)}</span>
                                  <span className="text-slate-500 dark:text-slate-400">{formatDisplayDateTime(entry.start_time, lang)}</span>
                                </div>
                              </div>
                            ))}
                          </div>
                        </td>
                      </tr>
                    ) : null}
                  </Fragment>
                );
              })}
              <tr className="bg-sky-50/80 font-semibold dark:bg-sky-500/10">
                <td className="px-3 py-3">{labels.total}</td>
                <td className="px-3 py-3">{localizeDigits(summary.billable_duration, lang)}</td>
                <td className="px-3 py-3">{localizeDigits(summary.non_billable_duration, lang)}</td>
                <td className="px-3 py-3">-</td>
                <td className="px-3 py-3">{formatMoneyTotals(summary.income_totals, lang)}</td>
                <td className="px-3 py-3" />
              </tr>
            </tbody>
          </table>
        </div>
      </div>

      <BreakdownCards title={labels.clientsTable} rows={clients} labels={labels} lang={lang} />
      <BreakdownCards title={labels.projectsTable} rows={projects} labels={labels} lang={lang} />
      <BreakdownCards title={labels.tagsTable} rows={tags} labels={labels} lang={lang} />
    </div>
  );
}