import chalk from "chalk";
import {
  BenchmarkRunner,
  DryRunHelper,
  createMockCustomer,
  createMockProduct,
} from "./benchmark-utils.js";

// Mock product attachment operations
const mockAttachProduct = async (params: any) => {
  const { customer_id, product_id, force_checkout } = params;

  // Simulate the attach workflow from existing tests
  DryRunHelper.mockDbOperation("getCustomer", { customerId: customer_id });
  DryRunHelper.mockDbOperation("getProduct", { productId: product_id });

  // Simulate pricing calculations
  DryRunHelper.mockComplexCalculation(300); // Price calculation logic

  if (force_checkout) {
    // Simulate Stripe checkout creation
    DryRunHelper.mockStripeOperation("createCheckout", {
      customer_id,
      product_id,
    });
  }

  // Simulate entitlement updates
  DryRunHelper.mockDbOperation("updateEntitlements", {
    customer_id,
    product_id,
    entitlements: ["premium_feature", "advanced_api"],
  });

  return { success: true, attached: true };
};

const mockUpgradeProduct = async (params: any) => {
  const { customer_id, from_product_id, to_product_id } = params;

  // Simulate upgrade workflow
  DryRunHelper.mockDbOperation("getCurrentProduct", {
    customer_id,
    from_product_id,
  });
  DryRunHelper.mockDbOperation("getTargetProduct", { to_product_id });

  // Simulate prorated billing calculation (CPU intensive)
  DryRunHelper.mockComplexCalculation(800);

  // Simulate Stripe subscription update
  DryRunHelper.mockStripeOperation("updateSubscription", {
    customer_id,
    from_product_id,
    to_product_id,
  });

  // Update entitlements
  DryRunHelper.mockDbOperation("migrateEntitlements", {
    customer_id,
    from_product_id,
    to_product_id,
  });

  return { success: true, upgraded: true };
};

const mockDowngradeProduct = async (params: any) => {
  const { customer_id, from_product_id, to_product_id } = params;

  // Similar to upgrade but with different calculations
  DryRunHelper.mockDbOperation("getCurrentProduct", {
    customer_id,
    from_product_id,
  });
  DryRunHelper.mockDbOperation("getTargetProduct", { to_product_id });

  // Downgrade calculations (typically simpler)
  DryRunHelper.mockComplexCalculation(400);

  // Stripe operations
  DryRunHelper.mockStripeOperation("updateSubscription", {
    customer_id,
    from_product_id,
    to_product_id,
  });

  // Handle feature restrictions
  DryRunHelper.mockDbOperation("restrictEntitlements", {
    customer_id,
    restricted_features: ["premium_feature"],
  });

  return { success: true, downgraded: true };
};

const mockCalculatePricing = async (params: any) => {
  const { product_id, customer_id, usage_data } = params;

  // Simulate complex pricing calculation
  DryRunHelper.mockDbOperation("getProductPricing", { product_id });
  DryRunHelper.mockDbOperation("getCustomerUsage", { customer_id });

  // CPU-intensive pricing calculations
  DryRunHelper.mockComplexCalculation(600);

  // Simulate tier-based pricing logic
  const tiers = usage_data?.tiers || [100, 1000, 10000];
  let totalCost = 0;
  for (const tier of tiers) {
    totalCost += tier * 0.01; // Mock pricing calculation
  }

  return { totalCost, breakdown: tiers };
};

const mockEntityAttachment = async (params: any) => {
  const { customer_id, product_id, entity_id } = params;

  // Simulate entity-specific attachment
  DryRunHelper.mockDbOperation("getEntity", { entity_id });
  DryRunHelper.mockDbOperation("attachToEntity", {
    customer_id,
    product_id,
    entity_id,
  });

  // Entity-specific calculations
  DryRunHelper.mockComplexCalculation(200);

  return { success: true, entity_attached: true };
};

export const runAttachBenchmarks = async () => {
  const runner = new BenchmarkRunner({
    iterations: 50,
    warmupIterations: 5,
  });

  console.log(chalk.cyan("🔗 Product & Billing Operations"));
  console.log(chalk.gray("Measuring subscription and pricing workflows\n"));

  // Real-world product operations
  await runner.run("Free Plan Signup", async () => {
    await mockAttachProduct({
      customer_id: "new_customer_123",
      product_id: "starter_free",
      force_checkout: false,
    });
  });

  await runner.run("Paid Plan Subscription", async () => {
    await mockAttachProduct({
      customer_id: "converting_customer_456",
      product_id: "pro_monthly",
      force_checkout: true,
    });
  });

  await runner.run("Plan Upgrade (Basic → Pro)", async () => {
    await mockUpgradeProduct({
      customer_id: "existing_customer_789",
      from_product_id: "basic_monthly",
      to_product_id: "pro_monthly",
    });
  });

  await runner.run("Plan Downgrade (Pro → Basic)", async () => {
    await mockDowngradeProduct({
      customer_id: "downgrading_customer_321",
      from_product_id: "pro_monthly",
      to_product_id: "basic_monthly",
    });
  });

  await runner.run("Usage-Based Pricing Calc", async () => {
    await mockCalculatePricing({
      product_id: "usage_tier_product",
      customer_id: "heavy_user_654",
      usage_data: {
        tiers: [1000, 5000, 25000, 100000],
        features: ["api_requests", "storage_gb", "compute_hours"],
      },
    });
  });

  await runner.run("Team Plan Setup", async () => {
    await mockEntityAttachment({
      customer_id: "team_lead_987",
      product_id: "team_plan",
      entity_id: "team_acme_corp",
    });
  });

  await runner.run("Bulk Plan Changes (5 customers)", async () => {
    const promises: Promise<any>[] = [];
    for (let i = 0; i < 5; i++) {
      promises.push(
        mockAttachProduct({
          customer_id: `bulk_customer_${i}`,
          product_id: "standard_plan",
          force_checkout: false,
        })
      );
    }
    await Promise.all(promises);
  });

  runner.printSummary();
  return runner.getResults();
};