import Link from "next/link";
import { BillingRefreshListener } from "@/components/billing-refresh-listener";
import { CopyButton } from "@/components/copy-button";
import { GatewayBindForm } from "@/components/gateway-bind-form";
import {
  type BillingCredits,
  type BillingInvoices,
  type BillingSubscription,
  PopiartApiError,
  getBillingCredits,
  getBillingInvoices,
  getBillingSubscription,
  getBudgetSummary,
  getBudgetUsage,
  getPopiartEndpoint,
  getProjects,
  getSkillsCatalog,
  getViewerSession,
} from "@/lib/popiart-api";
import { getLiveCopy } from "@/lib/live-copy";
import { type Locale } from "@/lib/site-content";

export const dynamic = "force-dynamic";

function formatNumber(locale: Locale, value: number) {
  return new Intl.NumberFormat(locale === "zh" ? "zh-CN" : "en-US").format(value);
}

function maskSecret(value?: string) {
  if (!value) {
    return "Unavailable";
  }
  if (value.length <= 10) {
    return value;
  }
  return `${value.slice(0, 8)} • • • • ${value.slice(-4)}`;
}

function formatError(error: unknown) {
  if (error instanceof PopiartApiError) {
    return error.message;
  }
  if (error instanceof Error) {
    return error.message;
  }
  return String(error);
}

function coerceEpoch(value: unknown) {
  const num = Number(value);
  return Number.isFinite(num) && num > 0 ? num : 0;
}

function extractRecentOrder(invoices: BillingInvoices | null) {
  type BillingOrderItem = Record<string, unknown> & { __kind: "subscription" | "points" };

  const items: BillingOrderItem[] = [
    ...((invoices?.subscription_orders?.items || []).map((item) => ({ ...item, __kind: "subscription" as const }))),
    ...((invoices?.point_orders?.items || []).map((item) => ({ ...item, __kind: "points" as const }))),
  ];
  items.sort((a, b) => {
    const aTime = coerceEpoch(a.complete_time) || coerceEpoch(a.create_time) || Number(a.id || 0);
    const bTime = coerceEpoch(b.complete_time) || coerceEpoch(b.create_time) || Number(b.id || 0);
    return bTime - aTime;
  });
  return items[0] ?? null;
}

export default async function ConsolePage({
  params,
}: {
  params: Promise<{ locale: string }>;
}) {
  const { locale } = await params;
  const typedLocale = locale as Locale;
  const liveCopy = getLiveCopy(typedLocale);
  const session = await getViewerSession();
  const isZh = typedLocale === "zh";

  const pageTitle = isZh ? "控制台" : "Console";
  const pageSubtitle = isZh
    ? "管理产品层密钥、查看用量、快速接入 CLI"
    : "Manage product-layer keys, usage, and quick CLI onboarding.";
  const remainingLabel = isZh ? "剩余 Credit" : "Remaining credits";
  const remainingHint = isZh ? "总计可用额度" : "Total available quota";
  const usedLabel = isZh ? "已使用" : "Used";
  const usedHint = isZh ? "本月累计消耗" : "Consumed this month";
  const callsLabel = isZh ? "调用次数" : "API calls";
  const callsHint = isZh ? "本月 CLI / API 调用" : "CLI / API calls this month";
  const projectsLabel = isZh ? "活跃项目" : "Projects";
  const projectsHint = isZh ? "当前账号下可见项目" : "Projects visible to this account";
  const keysTitle = isZh ? "API 密钥" : "API keys";
  const quickTitle = isZh ? "快速安装指令" : "Quick install commands";
  const quickBody = isZh
    ? "把下面这段命令复制到终端，完成 CLI 安装、登录和验证。"
    : "Copy these commands into your terminal to install the CLI, sign in, and verify the workflow.";
  const usageTitle = isZh ? "近期用量" : "Recent usage";
  const usageEmpty = isZh ? "当前周期还没有技能用量。" : "No usage has been recorded for the current period.";
  const skillsTitle = isZh ? "官方技能" : "Official skills";
  const skillsEmpty = isZh ? "当前账号下没有可见技能。" : "No skills are visible for this account yet.";
  const projectsTitle = isZh ? "项目" : "Projects";
  const projectsEmpty = isZh ? "当前账号下没有可见项目。" : "No projects are visible for this account yet.";
  const billingTitle = isZh ? "网关账单" : "Gateway billing";
  const billingStatusTitle = isZh ? "订阅状态" : "Subscription";
  const billingCreditsTitle = isZh ? "积分余额" : "Credits";
  const recentOrderTitle = isZh ? "最近订单" : "Recent order";
  const recentOrderEmpty = isZh ? "当前还没有账单订单记录。" : "No billing orders yet.";
  const billingUnbound = isZh
    ? "当前 session 还没有绑定网关用户态，先绑定后才能读取真实订阅与积分。"
    : "This session is not bound to a gateway user yet. Bind it first to read live subscription and credit data.";
  const billingEmpty = isZh ? "当前没有有效订阅。" : "No active subscription was returned.";
  const walletEmpty = isZh ? "当前没有积分钱包记录。" : "No point wallets were returned.";
  const boundLabel = isZh ? "已绑定网关用户" : "Gateway user bound";
  const preferenceLabel = isZh ? "扣费偏好" : "Billing preference";
  const activeSubscriptionLabel = isZh ? "有效订阅" : "Active subscriptions";
  const creditBalanceLabel = isZh ? "当前余额" : "Balance";
  const walletCountLabel = isZh ? "钱包数量" : "Wallets";
  const availablePointsLabel = isZh ? "可用积分" : "Available points";
  const totalPointsLabel = isZh ? "总积分" : "Total points";
  const walletSourceLabel = isZh ? "来源" : "Source";
  const routeKeyLabel = isZh ? "路由键" : "Route key";
  const usageJobsLabel = isZh ? "调用次数" : "Jobs";
  const usageTokensLabel = isZh ? "Tokens" : "Tokens";
  const usageCostLabel = isZh ? "费用" : "Cost";
  const sessionKeyLabel = "POPIART_SESSION_KEY";
  const endpointLabel = "POPIART_ENDPOINT";
  const copyLabel = isZh ? "复制" : "Copy";
  const copiedLabel = isZh ? "已复制" : "Copied";
  const loginCta = isZh ? "去登录" : "Sign in";
  const docsCta = isZh ? "查看文档" : "Open docs";
  const bindLabels = {
    title: isZh ? "绑定网关用户" : "Bind gateway user",
    body: isZh
      ? "输入网关真实用户 ID 和 user access_token，当前 session 才能读取订阅、积分包和订单。"
      : "Enter the real gateway user ID and user access token so this session can read subscriptions, point packs, and orders.",
    userIdLabel: isZh ? "网关用户 ID" : "Gateway user ID",
    userIdHint: isZh ? "值必须等于网关当前登录用户的真实 ID。" : "This must match the real ID of the gateway user.",
    tokenLabel: isZh ? "网关 access_token" : "Gateway access token",
    tokenHint: isZh
      ? "使用网关 `/api/user/token` 生成的普通用户 access_token，不是渠道 key。"
      : "Use the user access token generated by gateway `/api/user/token`, not a channel key.",
    submit: isZh ? "绑定网关账单" : "Bind gateway billing",
    submitting: isZh ? "绑定中..." : "Binding...",
    invalidUserId: isZh ? "请输入有效的网关用户 ID。" : "Enter a valid gateway user ID.",
    invalidToken: isZh ? "请输入有效的网关 access_token。" : "Enter a valid gateway access token.",
    success: isZh ? "绑定成功，正在刷新账单数据。" : "Binding succeeded. Refreshing billing data.",
  };

  if (!session) {
    return (
      <div className="page-stack">
        <section className="section-panel console-hero">
          <div className="section-heading">
            <h1>{pageTitle}</h1>
            <p>{pageSubtitle}</p>
          </div>
        </section>

        <section className="section-panel console-surface-card">
          <div className="section-heading compact">
            <h2>{liveCopy.console.unauthenticatedTitle}</h2>
            <p>{liveCopy.console.unauthenticatedBody}</p>
          </div>
          <div className="hero-actions">
            <Link className="button button-dark" href={`/${locale}/login`}>
              {loginCta}
            </Link>
            <Link className="button button-light" href={`/${locale}/docs`}>
              {docsCta}
            </Link>
          </div>
        </section>
      </div>
    );
  }

  const [budgetResult, usageResult, skillsResult, projectsResult] = await Promise.allSettled([
    getBudgetSummary(),
    getBudgetUsage(),
    getSkillsCatalog(),
    getProjects(),
  ]);
  const budget = budgetResult.status === "fulfilled" ? budgetResult.value : null;
  const usage = usageResult.status === "fulfilled" ? usageResult.value : null;
  const skills = skillsResult.status === "fulfilled" ? skillsResult.value : null;
  const projects = projectsResult.status === "fulfilled" ? projectsResult.value : null;
  const loadErrors = [budgetResult, usageResult, skillsResult, projectsResult]
    .filter((result) => result.status === "rejected")
    .map((result) => formatError((result as PromiseRejectedResult).reason));
  let billingSubscription: BillingSubscription | null = null;
  let billingCredits: BillingCredits | null = null;
  let billingInvoices: BillingInvoices | null = null;
  const billingErrors: string[] = [];

  if (session.gateway_bound) {
    const [subscriptionResult, creditsResult, invoicesResult] = await Promise.allSettled([
      getBillingSubscription(),
      getBillingCredits(),
      getBillingInvoices({ page: 1, pageSize: 1 }),
    ]);
    if (subscriptionResult.status === "fulfilled") {
      billingSubscription = subscriptionResult.value;
    } else {
      billingErrors.push(formatError(subscriptionResult.reason));
    }
    if (creditsResult.status === "fulfilled") {
      billingCredits = creditsResult.value;
    } else {
      billingErrors.push(formatError(creditsResult.reason));
    }
    if (invoicesResult.status === "fulfilled") {
      billingInvoices = invoicesResult.value;
    } else {
      billingErrors.push(formatError(invoicesResult.reason));
    }
  }
  const recentOrder = extractRecentOrder(billingInvoices);

  const metrics = [
    {
      label: remainingLabel,
      value: budget ? formatNumber(typedLocale, budget.remaining.tokens) : "--",
      hint: remainingHint,
    },
    {
      label: usedLabel,
      value: budget ? formatNumber(typedLocale, budget.used.tokens) : "--",
      hint: usedHint,
    },
    {
      label: callsLabel,
      value: usage ? formatNumber(typedLocale, usage.total.job_count) : "--",
      hint: callsHint,
    },
    {
      label: projectsLabel,
      value: projects ? formatNumber(typedLocale, projects.total) : "--",
      hint: projectsHint,
    },
  ];

  const quickStart = [
    "brew tap wtgoku-create/popi",
    "brew install wtgoku-create/popi/popiart",
    `export POPIART_ENDPOINT=${getPopiartEndpoint()}`,
    "popiart auth login --key <your-popinewapi-key>",
    "popiart skills list",
  ].join("\n");

  return (
    <div className="page-stack">
      <BillingRefreshListener />

      <section className="section-panel console-hero">
        <div className="section-heading">
          <h1>{pageTitle}</h1>
          <p>{pageSubtitle}</p>
        </div>
        {loadErrors.length > 0 ? (
          <div className="status-banner status-banner-error">
            <strong>{liveCopy.console.loadErrorPrefix}</strong>
            <span>{loadErrors.join(" | ")}</span>
          </div>
        ) : null}
      </section>

      <section className="console-metrics-grid">
        {metrics.map((metric) => (
          <article className="console-metric-card" key={metric.label}>
            <span>{metric.label}</span>
            <strong>{metric.value}</strong>
            <small>{metric.hint}</small>
          </article>
        ))}
      </section>

      <section className="console-surface-card">
        <div className="section-heading compact">
          <h2>{keysTitle}</h2>
        </div>
        <div className="console-key-list">
          <div className="console-key-row">
            <div className="console-key-copy">
              <div>
                <strong>{sessionKeyLabel}</strong>
                <span>{maskSecret(session.session_key)}</span>
              </div>
              {session.session_key ? (
                <CopyButton
                  className="button button-light button-small console-copy-button"
                  copiedLabel={copiedLabel}
                  copyLabel={copyLabel}
                  value={session.session_key}
                />
              ) : null}
            </div>
          </div>
          <div className="console-key-row">
            <div className="console-key-copy">
              <div>
                <strong>{endpointLabel}</strong>
                <span>{getPopiartEndpoint()}</span>
              </div>
              <CopyButton
                className="button button-light button-small console-copy-button"
                copiedLabel={copiedLabel}
                copyLabel={copyLabel}
                value={getPopiartEndpoint()}
              />
            </div>
          </div>
        </div>
      </section>

      <section className="console-surface-card">
        {!session.gateway_bound ? (
          <GatewayBindForm labels={bindLabels} />
        ) : (
          <>
            <div className="section-heading compact">
              <h2>{billingTitle}</h2>
              <p>
                {boundLabel}: {session.gateway_user_id}
              </p>
            </div>
            <div className="hero-actions">
              <Link className="button button-light button-small" href={`/${locale}/billing`}>
                {isZh ? "查看账单中心" : "Open billing"}
              </Link>
            </div>
            {billingErrors.length > 0 ? (
              <div className="status-banner status-banner-error">
                <span>{billingErrors.join(" | ")}</span>
              </div>
            ) : null}
            <div className="catalog-grid">
              <article className="console-surface-card billing-nested-card">
                <div className="section-heading compact">
                  <h2>{billingStatusTitle}</h2>
                </div>
                {billingSubscription && billingSubscription.subscriptions.length > 0 ? (
                  <div className="table-list">
                    <div className="table-row">
                      <div>
                        <strong>{preferenceLabel}</strong>
                        <span>{billingSubscription.billing_preference || "-"}</span>
                      </div>
                      <div>
                        <strong>{activeSubscriptionLabel}</strong>
                        <span>{formatNumber(typedLocale, billingSubscription.subscriptions.length)}</span>
                      </div>
                    </div>
                    {billingSubscription.subscriptions.map((item, index) => (
                      <div className="table-row" key={item.subscription?.id ?? index}>
                        <div>
                          <strong>{item.subscription?.member_level || "subscription"}</strong>
                          <span>{item.subscription?.status || "-"}</span>
                        </div>
                        <div>
                          <strong>{availablePointsLabel}</strong>
                          <span>
                            {formatNumber(
                              typedLocale,
                              billingSubscription.subscription_points[String(item.subscription?.id)]?.available_points || 0,
                            )}
                          </span>
                        </div>
                      </div>
                    ))}
                  </div>
                ) : (
                  <p className="billing-copy">{billingEmpty}</p>
                )}
              </article>

              <article className="console-surface-card billing-nested-card">
                <div className="section-heading compact">
                  <h2>{billingCreditsTitle}</h2>
                </div>
                {billingCredits ? (
                  <div className="table-list">
                    <div className="table-row">
                      <div>
                        <strong>{creditBalanceLabel}</strong>
                        <span>{formatNumber(typedLocale, billingCredits.balance)}</span>
                      </div>
                      <div>
                        <strong>{walletCountLabel}</strong>
                        <span>{formatNumber(typedLocale, billingCredits.wallets.length)}</span>
                      </div>
                    </div>
                    {billingCredits.wallets.slice(0, 4).map((wallet) => (
                      <div className="table-row" key={wallet.id}>
                        <div>
                          <strong>{walletSourceLabel}: {wallet.source_type}</strong>
                          <span>{availablePointsLabel}: {formatNumber(typedLocale, wallet.points)}</span>
                        </div>
                        <div>
                          <strong>{totalPointsLabel}</strong>
                          <span>{formatNumber(typedLocale, wallet.points_total)}</span>
                        </div>
                      </div>
                    ))}
                  </div>
                ) : (
                  <p className="billing-copy">{walletEmpty}</p>
                )}
              </article>

              <article className="console-surface-card billing-nested-card">
                <div className="section-heading compact">
                  <h2>{recentOrderTitle}</h2>
                </div>
                {recentOrder ? (
                  <div className="table-list">
                    <div className="table-row">
                      <div>
                        <strong>{String(recentOrder.plan_title || recentOrder.package_name || recentOrder.trade_no || "order")}</strong>
                        <span>{String(recentOrder.status || "-")}</span>
                      </div>
                      <div>
                        <strong>{String(recentOrder.money || "-")} {String(recentOrder.currency || "")}</strong>
                        <span>{String(recentOrder.payment_method || "-")}</span>
                      </div>
                    </div>
                    <div className="table-row">
                      <div>
                        <strong>{isZh ? "交易号" : "Trade no"}</strong>
                        <span>{String(recentOrder.trade_no || "-")}</span>
                      </div>
                      <div>
                        <strong>{isZh ? "订单类型" : "Order kind"}</strong>
                        <span>{recentOrder.__kind === "subscription" ? (isZh ? "订阅订单" : "Subscription") : (isZh ? "积分包订单" : "Points pack")}</span>
                      </div>
                    </div>
                  </div>
                ) : (
                  <p className="billing-copy">{recentOrderEmpty}</p>
                )}
              </article>
            </div>
          </>
        )}
      </section>

      <section className="console-surface-card">
        <div className="section-heading compact">
          <h2>{quickTitle}</h2>
          <p>{quickBody}</p>
        </div>
        <div className="console-code-block">
          <pre>
            <code>{quickStart}</code>
          </pre>
        </div>
      </section>

      <section className="console-surface-card">
        <div className="section-heading compact">
          <h2>{usageTitle}</h2>
        </div>
        {usage && usage.rows.length > 0 ? (
          <div className="table-list">
            {usage.rows.map((row) => (
              <div className="table-row" key={row.dimension}>
                <div>
                  <strong>{row.dimension}</strong>
                  <span>
                    {usageJobsLabel}: {formatNumber(typedLocale, row.job_count)}
                  </span>
                </div>
                <div>
                  <strong>
                    {usageTokensLabel}: {formatNumber(typedLocale, row.tokens_used)}
                  </strong>
                  <span>
                    {usageCostLabel}: ${row.cost_usd.toFixed(2)}
                  </span>
                </div>
              </div>
            ))}
          </div>
        ) : (
          <p className="billing-copy">{usageEmpty}</p>
        )}
      </section>

      <section className="catalog-grid">
        <article className="console-surface-card">
          <div className="section-heading compact">
            <h2>{skillsTitle}</h2>
          </div>
          {skills && skills.items.length > 0 ? (
            <div className="table-list">
              {skills.items.slice(0, 6).map((skill) => (
                <div className="table-row" key={skill.id}>
                  <div>
                    <strong>{skill.name}</strong>
                    <span>{skill.description}</span>
                  </div>
                  <div>
                    <strong>{skill.version}</strong>
                    <span>
                      {routeKeyLabel}: {skill.route_key || skill.id}
                    </span>
                  </div>
                </div>
              ))}
            </div>
          ) : (
            <p className="billing-copy">{skillsEmpty}</p>
          )}
        </article>

        <article className="console-surface-card">
          <div className="section-heading compact">
            <h2>{projectsTitle}</h2>
          </div>
          {projects && projects.items.length > 0 ? (
            <div className="table-list">
              {projects.items.map((project) => (
                <div className="table-row" key={project.id}>
                  <div>
                    <strong>{project.name}</strong>
                    <span>{project.id}</span>
                  </div>
                </div>
              ))}
            </div>
          ) : (
            <p className="billing-copy">{projectsEmpty}</p>
          )}
        </article>
      </section>
    </div>
  );
}