/**
 * Modern Business Logic Service for Web3.js v2 (2025)
 */

import type { Address } from '@solana/addresses';
import type { Rpc, SolanaRpcApi } from '@solana/rpc';
import type { Commitment } from '@solana/rpc-types';
import type { KeyPairSigner } from '@solana/signers';

/**
 * Payment method configuration
 */
export interface IPaymentMethod {
  type: 'crypto' | 'fiat';
  currency: 'SOL' | 'USDC' | 'USD';
  amount: bigint;
  escrowRequired: boolean;
}

/**
 * Subscription configuration
 */
export interface ISubscriptionConfig {
  agentId: Address;
  subscriber: Address;
  tier: 'basic' | 'premium' | 'enterprise';
  billingPeriod: 'monthly' | 'yearly';
  price: bigint;
}

/**
 * Work delivery data
 */
export interface IWorkDelivery {
  agentId: Address;
  customer: Address;
  deliverableHash: string;
  deliveredAt: number;
  verificationStatus: 'pending' | 'verified' | 'disputed';
}

/**
 * Payment result
 */
export interface IPaymentResult {
  success: boolean;
  transactionId: string;
  amount: bigint;
  timestamp: number;
  escrowId?: Address;
}

/**
 * Modern Business Logic Service
 */
export class BusinessLogicService {
  constructor(
    private readonly rpc: Rpc<SolanaRpcApi>,
    private readonly _programId: Address,
    private readonly commitment: Commitment = 'confirmed'
  ) {}

  /**
   * Process agent payment
   */
  async processPayment(
    _payer: KeyPairSigner,
    _recipient: Address,
    paymentMethod: IPaymentMethod
  ): Promise<IPaymentResult> {
    try {
      console.log(
        `💰 Processing ${paymentMethod.type} payment: ${paymentMethod.amount} ${paymentMethod.currency}`
      );

      // Simulate payment processing
      await new Promise(resolve => setTimeout(resolve, 2000));

      const now = Date.now();
      const transactionId = `tx_payment_${now}`;

      return {
        success: true,
        transactionId,
        amount: paymentMethod.amount,
        timestamp: now,
        escrowId: paymentMethod.escrowRequired
          ? (`escrow_${Date.now()}` as Address)
          : (`no_escrow` as Address),
      };
    } catch (error) {
      throw new Error(`Payment processing failed: ${String(error)}`);
    }
  }

  /**
   * Create subscription
   */
  async createSubscription(
    _subscriber: KeyPairSigner,
    config: ISubscriptionConfig
  ): Promise<{
    subscriptionId: Address;
    signature: string;
  }> {
    try {
      console.log(
        `📅 Creating ${config.tier} subscription for agent ${config.agentId}`
      );

      // Simulate subscription creation
      await new Promise(resolve => setTimeout(resolve, 1500));

      const subscriptionId = `subscription_${Date.now()}` as Address;
      const signature = `sig_subscription_${Date.now()}`;

      return { subscriptionId, signature };
    } catch (error) {
      throw new Error(`Subscription creation failed: ${String(error)}`);
    }
  }

  /**
   * Submit work delivery
   */
  async submitWorkDelivery(
    _agent: KeyPairSigner,
    _customer: Address,
    deliverableHash: string
  ): Promise<{
    deliveryId: Address;
    signature: string;
  }> {
    try {
      console.log(`📋 Submitting work delivery: ${deliverableHash}`);

      // Simulate work delivery submission
      await new Promise(resolve => setTimeout(resolve, 1200));

      const deliveryId = `delivery_${Date.now()}` as Address;
      const signature = `sig_delivery_${Date.now()}`;

      return { deliveryId, signature };
    } catch (error) {
      throw new Error(`Work delivery submission failed: ${String(error)}`);
    }
  }

  /**
   * Verify work delivery
   */
  async verifyWorkDelivery(
    _customer: KeyPairSigner,
    deliveryId: Address,
    approved: boolean
  ): Promise<string> {
    try {
      console.log(
        `✅ ${approved ? 'Approving' : 'Rejecting'} work delivery ${deliveryId}`
      );

      // Simulate verification
      await new Promise(resolve => setTimeout(resolve, 1000));

      return `sig_verify_${Date.now()}`;
    } catch (error) {
      throw new Error(`Work delivery verification failed: ${String(error)}`);
    }
  }

  /**
   * Get agent performance metrics
   */
  async getAgentMetrics(agentId: Address): Promise<{
    totalJobs: number;
    completedJobs: number;
    averageRating: number;
    totalEarnings: bigint;
    responseTime: number; // in hours
  }> {
    try {
      console.log(`📊 Getting performance metrics for agent ${agentId} on program ${this._programId}`);

      // Simulate metrics retrieval
      await new Promise(resolve => setTimeout(resolve, 800));

      return {
        totalJobs: 45,
        completedJobs: 42,
        averageRating: 4.7,
        totalEarnings: BigInt(15000000000), // 15 SOL
        responseTime: 2.5,
      };
    } catch (error) {
      throw new Error(`Failed to get agent metrics: ${String(error)}`);
    }
  }

  /**
   * Process subscription renewal
   */
  async renewSubscription(
    _subscriber: KeyPairSigner,
    subscriptionId: Address,
    paymentMethod: IPaymentMethod
  ): Promise<{
    renewed: boolean;
    nextBillingDate: number;
    paymentResult: IPaymentResult;
  }> {
    try {
      console.log(`🔄 Renewing subscription ${subscriptionId}`);

      // Process renewal payment
      const paymentResult = await this.processPayment(
        _subscriber,
        `platform_treasury` as Address,
        paymentMethod
      );

      const nextBillingDate = Date.now() + 30 * 24 * 60 * 60 * 1000; // 30 days

      return {
        renewed: paymentResult.success,
        nextBillingDate,
        paymentResult,
      };
    } catch (error) {
      throw new Error(`Subscription renewal failed: ${String(error)}`);
    }
  }

  /**
   * Calculate commission and fees
   */
  calculateFees(
    amount: bigint,
    agentTier: 'basic' | 'premium' | 'enterprise'
  ): {
    platformFee: bigint;
    agentCommission: bigint;
    netAmount: bigint;
  } {
    try {
      const feePercentages = {
        basic: 0.15, // 15%
        premium: 0.1, // 10%
        enterprise: 0.05, // 5%
      };

      const feePercentage = feePercentages[agentTier];
      const platformFee =
        (amount * BigInt(Math.floor(feePercentage * 100))) / BigInt(100);
      const agentCommission = amount - platformFee;

      return {
        platformFee,
        agentCommission,
        netAmount: agentCommission,
      };
    } catch (error) {
      throw new Error(`Fee calculation failed: ${String(error)}`);
    }
  }

  /**
   * Get subscription status
   */
  async getSubscriptionStatus(subscriptionId: Address): Promise<{
    active: boolean;
    tier: 'basic' | 'premium' | 'enterprise';
    nextBillingDate: number;
    autoRenewal: boolean;
  } | null> {
    try {
      const accountInfo = await this.rpc
        .getAccountInfo(subscriptionId, {
          commitment: this.commitment,
          encoding: 'base64',
        })
        .send();

      if (!accountInfo.value) {
        return null;
      }

      return {
        active: true,
        tier: 'premium',
        nextBillingDate: Date.now() + 25 * 24 * 60 * 60 * 1000, // 25 days
        autoRenewal: true,
      };
    } catch (error) {
      console.error('Failed to get subscription status:', error);
      return null;
    }
  }
}