"use client";

import Link from "next/link";
import { useCallback, useMemo, useState } from "react";
import { useTranslation } from "react-i18next";
import { useAsyncEffect } from "@/hooks/use-async-effect";
import { useTranslationRef } from "@/hooks/use-translation-ref";
import { toast } from "sonner";

import {
  getAdminDraw,
  getAdminDrawFinanceSummary,
  postAdminCancelDraw,
  postAdminManualCloseDraw,
  postAdminReopenDraw,
  postAdminRunDrawRng,
} from "@/api/admin-draws";
import { postAdminRunDrawSettlement } from "@/api/admin-settlement";
import { Button } from "@/components/ui/button";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { AdminNoResourceState } from "@/components/admin/admin-no-resource-state";
import { AdminLoadingState } from "@/components/admin/admin-loading-state";
import { useAdminDateTimeFormatter } from "@/hooks/use-admin-datetime-formatter";
import { useConfirmAction } from "@/hooks/use-confirm-action";
import { LotteryApiBizError } from "@/types/api/errors";
import type { AdminDrawFinanceSummaryData } from "@/types/api/admin-draw-finance";
import type { AdminDrawShowData } from "@/types/api/admin-draws";
import { canManageDrawResults } from "@/lib/draw-access";
import { adminHasAnyPermission } from "@/lib/admin-permissions";
import { useAdminProfile } from "@/stores/admin-session";
import { signedMoneyClass } from "@/lib/admin-signed-money";
import { cn } from "@/lib/utils";
import { formatAdminMinorUnits } from "@/lib/money";

import { drawStatusLabel, hallPreviewDiffersFromDbStatus } from "./draw-display";
import { DrawStatusBadge } from "./draw-status-badge";
import {
  PRD_DRAW_REOPEN_MANAGE,
  PRD_PAYOUT_MANAGE,
  PRD_PAYOUT_REVIEW,
} from "./draw-prd";

type ScheduleStep = {
  key: string;
  label: string;
  at: string | null | undefined;
};

function ScheduleTimeline({ steps }: { steps: ScheduleStep[] }) {
  const formatDt = useAdminDateTimeFormatter();

  return (
    <ol className="grid gap-3 sm:grid-cols-3">
      {steps.map((step, index) => (
        <li
          key={step.key}
          className={cn(
            "relative rounded-lg border bg-muted/20 px-3 py-2.5",
            index < steps.length - 1 &&
              "sm:after:absolute sm:after:top-1/2 sm:after:left-full sm:after:h-px sm:after:w-3 sm:after:-translate-y-1/2 sm:after:bg-border",
          )}
        >
          <p className="text-xs font-medium text-muted-foreground">{step.label}</p>
          <p className="mt-1 font-mono text-sm tabular-nums">{formatDt(step.at)}</p>
        </li>
      ))}
    </ol>
  );
}

export function DrawDetailConsole({ drawId }: { drawId: string }) {
  const { t } = useTranslation(["draws", "common"]);
  const tRef = useTranslationRef(["draws", "common"]);
  const idNum = Number(drawId);
  const profile = useAdminProfile();
  const canManageDraw = canManageDrawResults(profile?.permissions);
  const canReopenDraw = adminHasAnyPermission(profile?.permissions, [PRD_DRAW_REOPEN_MANAGE]);
  const canRunSettlement = adminHasAnyPermission(profile?.permissions, [
    PRD_PAYOUT_MANAGE,
    PRD_PAYOUT_REVIEW,
  ]);
  const [data, setData] = useState<AdminDrawShowData | null>(null);
  const [error, setError] = useState<string | null>(null);
  const [loading, setLoading] = useState(true);
  const [acting, setActing] = useState<string | null>(null);
  const [financeSummary, setFinanceSummary] = useState<AdminDrawFinanceSummaryData | null>(null);
  const { request: requestConfirm, ConfirmDialog } = useConfirmAction();

  const load = useCallback(async () => {
    if (!Number.isFinite(idNum)) {
      setError(tRef.current("invalidDrawId"));
      setLoading(false);
      return;
    }
    setLoading(true);
    setError(null);
    try {
      const draw = await getAdminDraw(idNum);
      setData(draw);
      if (draw.capabilities?.can_view_draw_finance !== false) {
        try {
          setFinanceSummary(await getAdminDrawFinanceSummary(idNum));
        } catch {
          setFinanceSummary(null);
        }
      } else {
        setFinanceSummary(null);
      }
    } catch (e) {
      setData(null);
      setFinanceSummary(null);
      setError(e instanceof LotteryApiBizError ? e.message : tRef.current("errors.loadFailed", { ns: "common" }));
    } finally {
      setLoading(false);
    }
  }, [idNum, tRef]);

  async function runAction(name: string, action: () => Promise<unknown>): Promise<void> {
    if (!Number.isFinite(idNum)) return;
    setActing(name);
    try {
      await action();
      toast.success(t("actionSuccess", { name }));
      await load();
    } catch (e) {
      toast.error(e instanceof LotteryApiBizError ? e.message : t("actionFailed", { name }));
    } finally {
      setActing(null);
    }
  }

  useAsyncEffect(() => {
    void load();
  }, [idNum]);

  const scheduleSteps = useMemo((): ScheduleStep[] => {
    if (!data) return [];
    const steps: ScheduleStep[] = [
      { key: "start", label: t("startTime"), at: data.start_time },
      { key: "close", label: t("closeTime"), at: data.close_time },
      { key: "draw", label: t("plannedDraw"), at: data.draw_time },
    ];
    if (data.cooling_end_time) {
      steps.push({
        key: "cooling",
        label: t("coolingEndTime"),
        at: data.cooling_end_time,
      });
    }
    return steps;
  }, [data, t]);

  const availableActions = useMemo(() => {
    if (!data) return [];

    type ActionDef = {
      key: string;
      label: string;
      variant: "outline" | "destructive";
      enabled: boolean;
      onConfirm: () => Promise<void>;
      confirmTitle: string;
      confirmDescription: string;
      confirmVariant?: "default" | "destructive";
    };

    const defs: ActionDef[] = [];

    if (canManageDraw) {
      defs.push(
        {
          key: "manualClose",
          label: t("manualClose"),
          variant: "outline",
          enabled: ["pending", "open"].includes(data.status),
          onConfirm: async () => { await postAdminManualCloseDraw(idNum); },
          confirmTitle: t("confirm.manualCloseTitle"),
          confirmDescription: t("confirm.manualCloseDescription"),
        },
        {
          key: "cancel",
          label: t("cancelBeforeDraw"),
          variant: "outline",
          enabled: ["pending", "open", "closing", "closed"].includes(data.status),
          onConfirm: async () => { await postAdminCancelDraw(idNum); },
          confirmTitle: t("confirm.cancelDrawTitle"),
          confirmDescription: t("confirm.cancelDrawDescription"),
        },
        {
          key: "rng",
          label: t("rngAutoGenerate"),
          variant: "outline",
          enabled: data.status === "closed",
          onConfirm: async () => { await postAdminRunDrawRng(idNum); },
          confirmTitle: t("confirm.rngDrawTitle"),
          confirmDescription: t("confirm.rngDrawDescription"),
        },
      );
    }

    if (canReopenDraw) {
      defs.push({
        key: "reopen",
        label: t("cooldownReopen"),
        variant: "destructive",
        enabled: data.status === "cooldown",
        onConfirm: async () => { await postAdminReopenDraw(idNum); },
        confirmTitle: t("confirm.reopenTitle"),
        confirmDescription: t("confirm.reopenDescription"),
        confirmVariant: "destructive",
      });
    }

    if (canRunSettlement) {
      defs.push({
        key: "settlement",
        label: t("runSettlement"),
        variant: "outline",
        enabled: data.status === "settling",
        onConfirm: async () => { await postAdminRunDrawSettlement(idNum); },
        confirmTitle: t("confirm.runSettlementTitle"),
        confirmDescription: t("confirm.runSettlementDescription"),
      });
    }

    return defs.filter((d) => d.enabled);
  }, [canManageDraw, canReopenDraw, canRunSettlement, data, idNum, t]);

  if (loading && !data) {
    return <AdminLoadingState minHeight="6rem" className="py-6" />;
  }

  if (error) {
    return <p className="text-sm text-destructive">{error}</p>;
  }
  if (!data) {
    return <AdminNoResourceState />;
  }

  const batch = data.result_batch_counts;
  const pendingReview = batch.pending_review ?? 0;
  const totalBatches = batch.total ?? batch.published;
  const financeCurrency = financeSummary?.currency_code ?? "NPR";
  const hasResultActivity =
    (canManageDraw && (totalBatches > 0 || pendingReview > 0)) || batch.published > 0;
  const showActions =
    availableActions.length > 0 && (canManageDraw || canReopenDraw || canRunSettlement);

  return (
    <div className="space-y-4">
      <Card>
        <CardHeader className="pb-4">
          <div className="flex flex-wrap items-start justify-between gap-3">
            <div className="min-w-0">
              <div className="mb-3">
                <Link
                  href="/admin/draws"
                  className="text-sm font-medium text-primary underline-offset-4 hover:underline"
                >
                  {t("backToList")}
                </Link>
              </div>
              <CardTitle className="font-mono text-xl tracking-tight">{data.draw_no}</CardTitle>
              <p className="mt-1 text-sm text-muted-foreground">
                {t("detailSubtitle", {
                  date: data.business_date,
                  seq: data.sequence_no,
                })}
              </p>
            </div>
            <div className="flex flex-wrap items-center gap-2">
              <DrawStatusBadge
                status={data.status}
                label={drawStatusLabel(data.status, t)}
              />
              {hallPreviewDiffersFromDbStatus(data.status, data.hall_preview_status) ? (
                <>
                  <span className="text-xs text-muted-foreground">{t("hallPreviewStatusLabel")}</span>
                  <DrawStatusBadge
                    status={data.hall_preview_status}
                    label={drawStatusLabel(data.hall_preview_status, t)}
                  />
                </>
              ) : null}
            </div>
          </div>
        </CardHeader>

        <CardContent className="space-y-6 border-t pt-6">
          <section className="space-y-3">
            <h3 className="text-sm font-medium">{t("overviewTitle")}</h3>
            <div className="grid gap-3 sm:grid-cols-3">
              <div className="rounded-lg border bg-muted/20 px-3 py-2.5">
                <p className="text-xs font-medium text-muted-foreground">{t("overviewBetTotal")}</p>
                <p className="mt-1 font-mono text-sm tabular-nums">
                  {formatAdminMinorUnits(
                    financeSummary?.total_bet_minor ?? data.total_bet_minor ?? 0,
                    financeCurrency,
                  )}
                </p>
              </div>
              <div className="rounded-lg border bg-muted/20 px-3 py-2.5">
                <p className="text-xs font-medium text-muted-foreground">{t("overviewPayoutTotal")}</p>
                <p className="mt-1 font-mono text-sm tabular-nums">
                  {formatAdminMinorUnits(
                    financeSummary?.total_payout_minor ?? data.total_payout_minor ?? 0,
                    financeCurrency,
                  )}
                </p>
              </div>
              <div className="rounded-lg border bg-muted/20 px-3 py-2.5">
                <p className="text-xs font-medium text-muted-foreground">{t("overviewProfitLoss")}</p>
                <p
                  className={cn(
                    "mt-1 font-mono text-sm tabular-nums",
                    signedMoneyClass(
                      financeSummary?.approx_house_gross_minor ?? data.profit_loss_minor ?? 0,
                      true,
                    ),
                  )}
                >
                  {formatAdminMinorUnits(
                    financeSummary?.approx_house_gross_minor ?? data.profit_loss_minor ?? 0,
                    financeCurrency,
                  )}
                </p>
              </div>
            </div>
          </section>

          <section className="space-y-3">
            <h3 className="text-sm font-medium">{t("scheduleTitle")}</h3>
            <ScheduleTimeline steps={scheduleSteps} />
          </section>

          <section className="space-y-3">
            <h3 className="text-sm font-medium">{t("resultBatchesTitle")}</h3>
            {hasResultActivity ? (
              <div className="flex flex-wrap items-center gap-2 text-sm">
                {canManageDraw ? (
                  <span className="rounded-md bg-muted px-2.5 py-1">
                    {t("batchSummaryTotal", { count: totalBatches })}
                  </span>
                ) : null}
                {canManageDraw ? (
                  pendingReview > 0 ? (
                    <Link
                      href={`/admin/draws/${drawId}/review`}
                      className="rounded-md bg-amber-500/15 px-2.5 py-1 font-medium text-amber-800 dark:text-amber-200"
                    >
                      {t("batchSummaryPending", { count: pendingReview })}
                    </Link>
                  ) : (
                    <span className="rounded-md bg-muted px-2.5 py-1 text-muted-foreground">
                      {t("batchSummaryPending", { count: 0 })}
                    </span>
                  )
                ) : null}
                {batch.published > 0 ? (
                  <Link
                    href={`/admin/draws/${drawId}/results`}
                    className="rounded-md bg-emerald-500/15 px-2.5 py-1 font-medium text-emerald-800 dark:text-emerald-200"
                  >
                    {t("batchSummaryPublished", { count: batch.published })}
                  </Link>
                ) : (
                  <span className="rounded-md bg-muted px-2.5 py-1 text-muted-foreground">
                    {t("batchSummaryPublished", { count: 0 })}
                  </span>
                )}
              </div>
            ) : (
              <p className="text-sm text-muted-foreground">
                {t("noResultBatchesYet")}
                <span className="ml-1">{t("reviewQueueHint")}</span>
                {canManageDraw ? (
                  <>
                    {" "}
                    <Link
                      href={`/admin/draws/${drawId}/review`}
                      className="font-medium text-primary underline-offset-4 hover:underline"
                    >
                      {t("goToReviewTab")}
                    </Link>
                  </>
                ) : null}
              </p>
            )}
          </section>

          {showActions ? (
            <section className="space-y-3 border-t pt-6">
              <h3 className="text-sm font-medium">{t("drawActions")}</h3>
              <div className="flex flex-wrap gap-2">
                {availableActions.map((action) => (
                  <Button
                    key={action.key}
                    type="button"
                    size="sm"
                    variant={action.variant}
                    disabled={acting !== null}
                    onClick={() =>
                      requestConfirm({
                        title: action.confirmTitle,
                        description: action.confirmDescription,
                        confirmVariant: action.confirmVariant,
                        onConfirm: () => runAction(action.label, action.onConfirm),
                      })
                    }
                  >
                    {acting === action.label ? t("processing") : action.label}
                  </Button>
                ))}
              </div>
            </section>
          ) : null}
        </CardContent>
      </Card>
      <ConfirmDialog />
    </div>
  );
}