import type { Metadata } from "next";
import { Gift, Sparkles, WalletCards } from "lucide-react";
import { createCoupon, createPromotionRule } from "@/actions/admin/commerce";
import { ActiveStatusBadge, StatusBadge } from "@/components/admin/status-badge";
import { PageHeader, PageShell, SectionHeader } from "@/components/shared/page-shell";
import { Pagination } from "@/components/shared/pagination";
import { PendingSubmitButton } from "@/components/shared/pending-submit-button";
import type { StatusTone } from "@/components/shared/status-badge";
import { BooleanToggle } from "@/components/ui/boolean-toggle";
import { Input } from "@/components/ui/input";
import { Label } from "@/components/ui/label";
import { Tabs, TabsContent, TabsList, TabsTrigger } from "@/components/ui/tabs";
import { formatDate } from "@/lib/utils";
import { getCommerceData } from "./commerce-data";
import { CommerceToggleButton } from "./_components/commerce-actions";
import { DiscountTypeSelect } from "./_components/discount-type-select";
import { RechargeCardActions, type RechargeCardActionItem } from "./_components/recharge-card-actions";
import { RechargeCardForm } from "./_components/recharge-card-form";

function formatCouponDiscount(type: string, value: unknown) {
  const numericValue = Number(value);
  if (type === "PERCENT_OFF") {
    return `折扣 ${numericValue}%`;
  }
  return `立减 ¥${numericValue.toFixed(2)}`;
}

export const metadata: Metadata = {
  title: "商业配置",
  description: "管理优惠券与满减规则。",
};

const rechargeCardStatusLabels: Record<string, string> = {
  UNUSED: "未使用",
  REDEEMED: "已兑换",
  EXPIRED: "已过期",
  DISABLED: "已停用",
};

const rechargeCardStatusTones: Record<string, StatusTone> = {
  UNUSED: "success",
  REDEEMED: "info",
  EXPIRED: "warning",
  DISABLED: "danger",
};

function userLabel(user: { name: string | null; email: string } | null | undefined, fallback = "系统") {
  if (!user) return fallback;
  return user.name ? `${user.name} · ${user.email}` : user.email;
}

function formatRechargeCardValue(card: {
  type: "BALANCE" | "PLAN";
  balanceAmount: unknown;
  plan: { name: string } | null;
}) {
  return card.type === "BALANCE"
    ? `¥${Number(card.balanceAmount ?? 0).toFixed(2)}`
    : card.plan?.name ?? "套餐已删除";
}

type RechargeCardRow = {
  id: string;
  code: string;
  type: "BALANCE" | "PLAN";
  status: "UNUSED" | "REDEEMED" | "EXPIRED" | "DISABLED";
  balanceAmount: unknown;
  plan: { name: string } | null;
  batchName: string | null;
  expiresAt: Date | null;
  redeemedAt: Date | null;
  createdAt: Date;
  updatedAt: Date;
  createdBy: { name: string | null; email: string } | null;
  redeemedBy: { name: string | null; email: string } | null;
  transactions: Array<{
    amount: unknown;
    balanceAfter: unknown;
    createdAt: Date;
  }>;
};

function formatRechargeCardAction(card: RechargeCardRow): RechargeCardActionItem {
  const transaction = card.transactions[0] ?? null;
  return {
    id: card.id,
    code: card.code,
    type: card.type,
    typeLabel: card.type === "BALANCE" ? "余额卡" : "套餐卡",
    status: card.status,
    statusLabel: rechargeCardStatusLabels[card.status] ?? "未知状态",
    statusTone: rechargeCardStatusTones[card.status] ?? "neutral",
    valueLabel: formatRechargeCardValue(card),
    batchName: card.batchName,
    createdByLabel: userLabel(card.createdBy),
    redeemedByLabel: userLabel(card.redeemedBy, "未兑换"),
    createdAtLabel: formatDate(card.createdAt),
    updatedAtLabel: formatDate(card.updatedAt),
    expiresAtLabel: card.expiresAt ? formatDate(card.expiresAt) : "永不过期",
    redeemedAtLabel: card.redeemedAt ? formatDate(card.redeemedAt) : "未兑换",
    transactionLabel: transaction
      ? `余额入账 ¥${Number(transaction.amount).toFixed(2)} · 兑换后余额 ¥${Number(transaction.balanceAfter).toFixed(2)} · ${formatDate(transaction.createdAt)}`
      : null,
    releasesPlanStock: card.type === "PLAN"
      && card.status === "UNUSED"
      && (!card.expiresAt || card.expiresAt > new Date()),
  };
}

function normalizeCommerceTab(value: string | string[] | undefined) {
  return value === "manage" || value === "cards" ? value : "create";
}

export default async function AdminCommercePage({
  searchParams,
}: {
  searchParams: Promise<Record<string, string | string[] | undefined>>;
}) {
  const params = await searchParams;
  const activeTab = normalizeCommerceTab(params.tab);
  const { coupons, promotions, rechargeCards, rechargeCardPagination, plans } = await getCommerceData(params);

  return (
    <PageShell>
      <PageHeader
        eyebrow="商业配置"
        title="优惠与奖励"
      />

      <Tabs defaultValue={activeTab} className="space-y-6">
        <TabsList variant="line" className="surface-card p-1">
          <TabsTrigger value="create">新建规则</TabsTrigger>
          <TabsTrigger value="manage">规则列表</TabsTrigger>
          <TabsTrigger value="cards">充值卡</TabsTrigger>
        </TabsList>

        <TabsContent value="create">
          <section className="grid gap-5 xl:grid-cols-2">
            <form action={createCoupon} className="form-panel space-y-4">
              <SectionHeader title="新建优惠券" />
              <div className="grid gap-3 sm:grid-cols-2">
                <div className="space-y-2">
                  <Label htmlFor="coupon-code">优惠码</Label>
                  <Input id="coupon-code" name="code" placeholder="WELCOME10" required />
                </div>
                <div className="space-y-2">
                  <Label htmlFor="coupon-name">名称</Label>
                  <Input id="coupon-name" name="name" placeholder="新人礼遇" required />
                </div>
              </div>
              <div className="grid gap-3 sm:grid-cols-2">
                <div className="space-y-2">
                  <Label htmlFor="coupon-type">优惠类型</Label>
                  <DiscountTypeSelect />
                </div>
                <div className="space-y-2">
                  <Label htmlFor="coupon-value">优惠值</Label>
                  <Input id="coupon-value" name="discountValue" type="number" step="0.01" min="0.01" placeholder="10 或 15" required />
                </div>
              </div>
              <div className="grid gap-3 sm:grid-cols-3">
                <Input name="thresholdAmount" type="number" step="0.01" placeholder="满多少可用" />
                <Input name="totalLimit" type="number" placeholder="总次数" />
                <Input name="perUserLimit" type="number" placeholder="每人次数" />
              </div>
              <div className="space-y-2">
                <Label htmlFor="coupon-public">用户可见</Label>
                <BooleanToggle
                  id="coupon-public"
                  name="isPublic"
                  defaultValue
                  trueLabel="公开展示"
                  falseLabel="仅发放"
                  ariaLabel="用户可见"
                />
              </div>
              <PendingSubmitButton className="w-full" pendingLabel="创建中...">创建优惠券</PendingSubmitButton>
            </form>

            <form action={createPromotionRule} className="form-panel space-y-4">
              <SectionHeader title="新建满减" />
              <div className="space-y-2">
                <Label htmlFor="promotion-name">规则名称</Label>
                <Input id="promotion-name" name="name" placeholder="满百礼遇" required />
              </div>
              <div className="grid gap-3 sm:grid-cols-2">
                <div className="space-y-2">
                  <Label htmlFor="promotion-threshold">门槛金额</Label>
                  <Input id="promotion-threshold" name="thresholdAmount" type="number" step="0.01" min="0.01" required />
                </div>
                <div className="space-y-2">
                  <Label htmlFor="promotion-discount">减免金额</Label>
                  <Input id="promotion-discount" name="discountAmount" type="number" step="0.01" min="0.01" required />
                </div>
              </div>
              <div className="space-y-2">
                <Label htmlFor="promotion-sort">排序</Label>
                <Input id="promotion-sort" name="sortOrder" type="number" defaultValue={100} />
              </div>
              <PendingSubmitButton className="w-full" pendingLabel="创建中...">创建满减</PendingSubmitButton>
            </form>
          </section>
        </TabsContent>

        <TabsContent value="manage" className="space-y-6">
          <section className="space-y-4">
            <SectionHeader title="优惠券" />
            <div className="surface-card divide-y divide-border/60 overflow-hidden rounded-xl">
              {coupons.map((coupon) => (
                <article key={coupon.id} className="grid gap-4 px-4 py-4 lg:grid-cols-[minmax(0,1fr)_minmax(22rem,0.9fr)_auto] lg:items-center">
                  <div className="flex min-w-0 items-center gap-3">
                    <span className="flex size-10 shrink-0 items-center justify-center rounded-lg bg-amber-500/10 text-amber-700 dark:text-amber-300"><Gift className="size-4" /></span>
                    <div className="min-w-0">
                      <div className="flex min-h-6 flex-wrap items-center gap-2">
                        <h3 className="min-w-0 truncate font-semibold leading-6">{coupon.name}</h3>
                        <ActiveStatusBadge active={coupon.isActive} activeLabel="启用中" inactiveLabel="已停用" />
                      </div>
                      <p className="mt-1 truncate font-mono text-sm text-primary">{coupon.code}</p>
                    </div>
                  </div>
                  <div className="flex flex-wrap gap-2">
                    <StatusBadge tone="warning">
                      {formatCouponDiscount(coupon.discountType, coupon.discountValue)}
                    </StatusBadge>
                    <StatusBadge>{coupon.thresholdAmount == null ? "无门槛" : `满 ¥${Number(coupon.thresholdAmount).toFixed(2)}`}</StatusBadge>
                    <StatusBadge>{coupon.isPublic ? "公开展示" : "仅发放"}</StatusBadge>
                    <StatusBadge>订单 {coupon._count.orders} · 发放 {coupon._count.grants}</StatusBadge>
                  </div>
                  <div className="flex justify-start lg:justify-end">
                    <CommerceToggleButton kind="coupon" id={coupon.id} active={coupon.isActive} />
                  </div>
                </article>
              ))}
              {coupons.length === 0 && (
                <p className="px-4 py-8 text-center text-sm text-muted-foreground">暂无优惠券</p>
              )}
            </div>
          </section>

          <section className="space-y-4">
            <SectionHeader title="满减规则" />
            <div className="surface-card divide-y divide-border/60 overflow-hidden rounded-xl">
              {promotions.map((rule) => (
                <article key={rule.id} className="grid gap-4 px-4 py-4 lg:grid-cols-[minmax(0,1fr)_minmax(18rem,0.75fr)_auto] lg:items-center">
                  <div className="flex min-w-0 items-center gap-3">
                    <span className="flex size-10 shrink-0 items-center justify-center rounded-lg bg-primary/10 text-primary"><Sparkles className="size-4" /></span>
                    <div className="min-w-0">
                      <div className="flex min-h-6 flex-wrap items-center gap-2">
                        <h3 className="min-w-0 truncate font-semibold leading-6">{rule.name}</h3>
                        <ActiveStatusBadge active={rule.isActive} activeLabel="启用中" inactiveLabel="已停用" />
                      </div>
                      <p className="mt-1 text-sm text-muted-foreground">满 ¥{Number(rule.thresholdAmount).toFixed(2)} 减 ¥{Number(rule.discountAmount).toFixed(2)}</p>
                    </div>
                  </div>
                  <div className="flex flex-wrap gap-2">
                    <StatusBadge tone="info">减 ¥{Number(rule.discountAmount).toFixed(2)}</StatusBadge>
                    <StatusBadge>门槛 ¥{Number(rule.thresholdAmount).toFixed(2)}</StatusBadge>
                    <StatusBadge>排序 {rule.sortOrder}</StatusBadge>
                  </div>
                  <div className="flex justify-start lg:justify-end">
                    <CommerceToggleButton kind="promotion" id={rule.id} active={rule.isActive} />
                  </div>
                </article>
              ))}
              {promotions.length === 0 && (
                <p className="px-4 py-8 text-center text-sm text-muted-foreground">暂无满减规则</p>
              )}
            </div>
          </section>
        </TabsContent>

        <TabsContent value="cards" className="space-y-6">
          <section className="grid gap-5 xl:grid-cols-[minmax(22rem,0.75fr)_1fr]">
            <RechargeCardForm plans={plans} />

            <div className="space-y-4">
              <SectionHeader title="充值卡列表" />
              <div className="surface-card divide-y divide-border/60 overflow-hidden rounded-xl">
                {rechargeCards.map((card) => {
                  const actionCard = formatRechargeCardAction(card);
                  return (
                    <article key={card.id} className="grid gap-4 px-4 py-4 lg:grid-cols-[minmax(0,1fr)_minmax(14rem,0.6fr)_auto] lg:items-center">
                      <div className="flex min-w-0 items-center gap-3">
                        <span className="flex size-10 shrink-0 items-center justify-center rounded-lg bg-primary/10 text-primary">
                          <WalletCards className="size-4" />
                        </span>
                        <div className="min-w-0">
                          <div className="flex min-h-6 flex-wrap items-center gap-2">
                            <h3 className="min-w-0 truncate font-mono font-semibold">{card.code}</h3>
                            <StatusBadge tone={actionCard.statusTone}>
                              {actionCard.statusLabel}
                            </StatusBadge>
                          </div>
                          <p className="mt-1 text-sm text-muted-foreground">
                            {actionCard.typeLabel} · {actionCard.valueLabel}
                          </p>
                        </div>
                      </div>
                      <div className="flex flex-wrap gap-2">
                        {card.batchName && <StatusBadge>{card.batchName}</StatusBadge>}
                        {card.redeemedBy && <StatusBadge tone="info">{userLabel(card.redeemedBy, "已兑换")}</StatusBadge>}
                        <StatusBadge>{card.expiresAt ? `到期 ${formatDate(card.expiresAt)}` : "永不过期"}</StatusBadge>
                      </div>
                      <RechargeCardActions card={actionCard} />
                    </article>
                  );
                })}
                {rechargeCards.length === 0 && (
                  <p className="px-4 py-8 text-center text-sm text-muted-foreground">暂无充值卡</p>
                )}
              </div>
              <Pagination
                total={rechargeCardPagination.total}
                pageSize={rechargeCardPagination.pageSize}
                page={rechargeCardPagination.page}
                fixedParams={{ tab: "cards" }}
              />
            </div>
          </section>
        </TabsContent>
      </Tabs>
    </PageShell>
  );
}