import {
  db,
  getOrganizationBillingEventsCountSerieCached,
  getOrganizationById,
} from '@openpanel/db';
import {
  cancelSubscription,
  changeSubscription,
  createCheckout,
  createPortal,
  getProduct,
  getProducts,
  reactivateSubscription,
} from '@openpanel/payments';
import { zCheckout } from '@openpanel/validation';

import { getCache } from '@openpanel/redis';
import { subDays } from 'date-fns';
import { z } from 'zod';
import { TRPCBadRequestError } from '../errors';
import { createTRPCRouter, protectedProcedure } from '../trpc';

export const subscriptionRouter = createTRPCRouter({
  getCurrent: protectedProcedure
    .input(z.object({ organizationId: z.string() }))
    .query(async ({ input }) => {
      const organization = await getOrganizationById(input.organizationId);

      if (!organization.subscriptionProductId) {
        return null;
      }

      return getProduct(organization.subscriptionProductId);
    }),

  checkout: protectedProcedure
    .input(zCheckout)
    .mutation(async ({ input, ctx }) => {
      const [user, organization] = await Promise.all([
        db.user.findFirstOrThrow({
          where: {
            id: ctx.session.user.id,
          },
        }),
        db.organization.findFirstOrThrow({
          where: {
            id: input.organizationId,
          },
        }),
      ]);

      if (
        organization.subscriptionId &&
        organization.subscriptionStatus === 'active'
      ) {
        const existingProduct = organization.subscriptionProductId
          ? await getProduct(organization.subscriptionProductId)
          : null;

        // If the existing product is free, cancel the subscription and then jump to the checkout
        if (existingProduct?.prices.some((p) => p.amountType === 'free')) {
          await cancelSubscription(organization.subscriptionId);
        } else {
          if (organization.subscriptionCanceledAt) {
            await reactivateSubscription(organization.subscriptionId);
            return null;
          }

          await changeSubscription(
            organization.subscriptionId,
            input.productId,
          );
          return null;
        }
      }

      const checkout = await createCheckout({
        productId: input.productId,
        organizationId: input.organizationId,
        user,
        ipAddress: ctx.req.ip,
      });

      return {
        url: checkout.url,
      };
    }),

  products: protectedProcedure
    .input(z.object({ organizationId: z.string() }))
    .query(async ({ input }) => {
      const organization = await db.organization.findUniqueOrThrow({
        where: {
          id: input.organizationId,
        },
        select: {
          subscriptionPeriodEventsCount: true,
        },
      });

      return (
        await getCache('polar:products', 60 * 60 * 24, () => getProducts())
      ).map((product) => {
        const eventsLimit = product.metadata.eventsLimit;
        return {
          ...product,
          disabled:
            typeof eventsLimit === 'number' &&
            organization.subscriptionPeriodEventsCount >= eventsLimit
              ? 'This product is not applicable since you have exceeded the limits for this subscription.'
              : null,
        };
      });
    }),

  usage: protectedProcedure
    .input(
      z.object({
        organizationId: z.string(),
      }),
    )
    .query(async ({ input }) => {
      const organization = await db.organization.findUniqueOrThrow({
        where: {
          id: input.organizationId,
        },
        include: {
          projects: { select: { id: true } },
        },
      });

      if (
        organization.hasSubscription &&
        organization.subscriptionStartsAt &&
        organization.subscriptionEndsAt
      ) {
        return getOrganizationBillingEventsCountSerieCached(organization, {
          startDate: organization.subscriptionStartsAt,
          endDate: organization.subscriptionEndsAt,
        });
      }

      return getOrganizationBillingEventsCountSerieCached(organization, {
        startDate: subDays(new Date(), 30),
        endDate: new Date(),
      });
    }),

  cancelSubscription: protectedProcedure
    .input(z.object({ organizationId: z.string() }))
    .mutation(async ({ input }) => {
      const organization = await getOrganizationById(input.organizationId);
      if (!organization.subscriptionId) {
        throw TRPCBadRequestError('Organization has no subscription');
      }

      const res = await cancelSubscription(organization.subscriptionId);

      return res;
    }),

  portal: protectedProcedure
    .input(z.object({ organizationId: z.string() }))
    .mutation(async ({ input }) => {
      const organization = await getOrganizationById(input.organizationId);
      if (!organization.subscriptionCustomerId) {
        throw TRPCBadRequestError('Organization has no subscription');
      }

      const portal = await createPortal({
        customerId: organization.subscriptionCustomerId,
      });

      return {
        url: portal.customerPortalUrl,
      };
    }),
});