import { PLAN_CATALOG } from '../billing-subscription.mjs';

export function attachPortalBillingRoutes({
  app,
  jsonBody,
  userAuthReady = Promise.resolve(),
  getUserAuth = () => null,
  getRechargeService = () => null,
  getSubscriptionService = () => null,
  getMindSpace = () => null,
  userToken,
  planCatalogFallback = PLAN_CATALOG,
} = {}) {
  if (
    !app ||
    typeof jsonBody !== 'function' ||
    typeof userToken !== 'function'
  ) {
    throw new Error(
      'attachPortalBillingRoutes requires route dependencies',
    );
  }

  app.get(
    '/auth/billing/ledger',
    async (req, res) => {
      await userAuthReady;
      const userAuth = getUserAuth();
      if (!userAuth) {
        return res.status(503).json({
          message: '未启用用户系统',
        });
      }
      const me = await userAuth.getMe(
        userToken(req),
      );
      if (!me) {
        return res.status(401).json({
          message: '未登录',
        });
      }
      const limit = Math.min(
        Math.max(
          Number(req.query?.limit) || 30,
          1,
        ),
        100,
      );
      const entries =
        await userAuth.listBillingLedger({
          userId: me.id,
          limit,
          types: [
            'recharge',
            'adjust',
            'refund',
          ],
        });
      res.json({ entries });
    },
  );

  app.get(
    '/auth/billing/config',
    async (req, res) => {
      await userAuthReady;
      const userAuth = getUserAuth();
      const rechargeService =
        getRechargeService();
      if (!userAuth || !rechargeService) {
        return res.status(503).json({
          message: '未启用计费系统',
        });
      }
      const me = await userAuth.getMe(
        userToken(req),
      );
      if (!me) {
        return res.status(401).json({
          message: '未登录',
        });
      }
      const subscriptionService =
        getSubscriptionService();
      const [config, sub] = await Promise.all([
        rechargeService.getBillingConfig(me.id),
        subscriptionService
          ? subscriptionService.getActiveSubscription(
              me.id,
            )
          : null,
      ]);
      return res.json({
        ...config,
        subscription: sub,
      });
    },
  );

  app.get(
    '/auth/billing/subscription',
    async (req, res) => {
      await userAuthReady;
      const userAuth = getUserAuth();
      if (!userAuth) {
        return res.status(503).json({
          message: '未启用用户系统',
        });
      }
      const me = await userAuth.getMe(
        userToken(req),
      );
      if (!me) {
        return res.status(401).json({
          message: '未登录',
        });
      }
      const subscriptionService =
        getSubscriptionService();
      const sub = subscriptionService
        ? await subscriptionService.getActiveSubscription(
            me.id,
          )
        : null;
      const planCatalog =
        subscriptionService?._planCatalogService;
      const plans =
        !sub && planCatalog
          ? await planCatalog.listPlans({
              includeInactive: false,
            })
          : sub
            ? undefined
            : planCatalogFallback;
      return res.json({
        subscription: sub,
        plans,
      });
    },
  );

  app.get(
    '/auth/billing/plans',
    async (req, res) => {
      await userAuthReady;
      const userAuth = getUserAuth();
      if (!userAuth) {
        return res.status(503).json({
          message: '未启用用户系统',
        });
      }
      const me = await userAuth.getMe(
        userToken(req),
      );
      if (!me) {
        return res.status(401).json({
          message: '未登录',
        });
      }
      const subscriptionService =
        getSubscriptionService();
      const planCatalog =
        subscriptionService?._planCatalogService;
      const plans = planCatalog
        ? (
            await planCatalog.listPlans({
              includeInactive: false,
            })
          )
            .filter((plan) => plan.priceCents > 0)
            .map((plan) => ({
              key: plan.planType,
              ...plan,
            }))
        : Object.entries(planCatalogFallback)
            .filter(
              ([, plan]) => plan.priceCents > 0,
            )
            .map(([key, plan]) => ({
              key,
              ...plan,
            }));
      const [sub, wallet] = await Promise.all([
        subscriptionService
          ? subscriptionService.getActiveSubscription(
              me.id,
            )
          : null,
        userAuth.getUserById(me.id),
      ]);
      return res.json({
        plans,
        subscription: sub,
        balanceCents: wallet
          ? Number(wallet.balance_cents ?? 0)
          : 0,
      });
    },
  );

  app.post(
    '/auth/billing/subscribe',
    jsonBody,
    async (req, res) => {
      await userAuthReady;
      const userAuth = getUserAuth();
      const subscriptionService =
        getSubscriptionService();
      if (!userAuth || !subscriptionService) {
        return res.status(503).json({
          message: '未启用订阅系统',
        });
      }
      const me = await userAuth.getMe(
        userToken(req),
      );
      if (!me) {
        return res.status(401).json({
          message: '未登录',
        });
      }
      if (me.status === 'disabled') {
        return res.status(403).json({
          message: '账户已禁用',
        });
      }
      const {
        planType,
        autoRenew = false,
      } = req.body ?? {};
      if (
        !planType ||
        typeof planType !== 'string'
      ) {
        return res.status(400).json({
          message: '请选择套餐',
        });
      }
      const result =
        await subscriptionService.purchaseSubscription(
          me.id,
          planType,
          Boolean(autoRenew),
        );
      if (!result.ok) {
        if (
          result.code ===
          'INSUFFICIENT_BALANCE'
        ) {
          return res.status(402).json({
            message: result.message,
            code: result.code,
            balanceCents: result.balanceCents,
            requiredCents: result.requiredCents,
            shortfallCents:
              result.shortfallCents,
          });
        }
        if (
          result.code ===
          'DOWNGRADE_NOT_ALLOWED'
        ) {
          return res.status(409).json({
            message: result.message,
            code: result.code,
            currentPlanType:
              result.currentPlanType,
          });
        }
        return res.status(400).json({
          message: result.message,
        });
      }
      return res.json({
        subscription: result.subscription,
        balanceCents: result.balanceCents,
      });
    },
  );

  app.post(
    '/auth/billing/space-purchase',
    jsonBody,
    async (req, res) => {
      await userAuthReady;
      const userAuth = getUserAuth();
      const mindSpace = getMindSpace();
      if (!userAuth || !mindSpace) {
        return res.status(503).json({
          message: '未启用空间系统',
        });
      }
      const me = await userAuth.getMe(
        userToken(req),
      );
      if (!me) {
        return res.status(401).json({
          message: '未登录',
        });
      }
      const sizeMb = Number(req.body?.sizeMb);
      const result =
        await userAuth.purchaseSpaceQuota(
          me.id,
          sizeMb,
        );
      if (!result.ok) {
        if (
          result.code ===
          'INSUFFICIENT_BALANCE'
        ) {
          return res.status(402).json({
            message: result.message,
            code: result.code,
            details: {
              code: 'INSUFFICIENT_BALANCE',
              balanceCents:
                result.balanceCents,
              minRechargeCents:
                result.minRechargeCents,
              suggestedTiers:
                result.suggestedTiers,
            },
          });
        }
        return res.status(400).json({
          message: result.message,
        });
      }
      const quota = await mindSpace.getQuota(me.id);
      return res.json({
        quota: quota ?? result.quota,
        balanceCents: result.balanceCents,
        purchasedMb: sizeMb,
        costCents: sizeMb * 200,
      });
    },
  );

  app.post(
    '/auth/billing/auto-renew',
    jsonBody,
    async (req, res) => {
      await userAuthReady;
      const userAuth = getUserAuth();
      const subscriptionService =
        getSubscriptionService();
      if (!userAuth || !subscriptionService) {
        return res.status(503).json({
          message: '未启用订阅系统',
        });
      }
      const me = await userAuth.getMe(
        userToken(req),
      );
      if (!me) {
        return res.status(401).json({
          message: '未登录',
        });
      }
      const { enabled } = req.body ?? {};
      if (typeof enabled !== 'boolean') {
        return res.status(400).json({
          message: '请传入 enabled: true/false',
        });
      }
      const result =
        await subscriptionService.setAutoRenew(
          me.id,
          enabled,
        );
      return res.json(result);
    },
  );

  app.post(
    '/auth/billing/recharge-orders',
    jsonBody,
    async (req, res) => {
      await userAuthReady;
      const userAuth = getUserAuth();
      const rechargeService =
        getRechargeService();
      if (!userAuth || !rechargeService) {
        return res.status(503).json({
          message: '未启用计费系统',
        });
      }
      const me = await userAuth.getMe(
        userToken(req),
      );
      if (!me) {
        return res.status(401).json({
          message: '未登录',
        });
      }
      const amountCents = Number(
        req.body?.amountCents,
      );
      const payScene = [
        'native',
        'h5',
        'jsapi',
      ].includes(req.body?.payScene)
        ? req.body.payScene
        : 'native';
      const result =
        await rechargeService.createOrder({
          userId: me.id,
          amountCents,
          payScene,
          clientIp: req.ip,
        });
      if (!result.ok) {
        return res.status(400).json({
          message: result.message,
        });
      }
      return res.status(201).json({
        order: result.order,
      });
    },
  );

  app.get(
    '/auth/billing/recharge-orders/:orderId',
    async (req, res) => {
      await userAuthReady;
      const userAuth = getUserAuth();
      const rechargeService =
        getRechargeService();
      if (!userAuth || !rechargeService) {
        return res.status(503).json({
          message: '未启用计费系统',
        });
      }
      const me = await userAuth.getMe(
        userToken(req),
      );
      if (!me) {
        return res.status(401).json({
          message: '未登录',
        });
      }
      const order =
        await rechargeService.getOrderForUser(
          me.id,
          req.params.orderId,
        );
      if (!order) {
        return res.status(404).json({
          message: '订单不存在',
        });
      }
      let balanceCents = null;
      if (order.status === 'paid') {
        const user = await userAuth.getUserById(
          me.id,
        );
        balanceCents = user
          ? Number(user.balance_cents ?? 0)
          : null;
      }
      return res.json({
        order,
        balanceCents,
      });
    },
  );
}