const EmailClient = require("../core/EmailClient");
const TemplateManager = require("../core/TemplateManager");

/**
 * PaymentEmailService handles payment-related emails
 * This service is responsible for:
 * - Sending payment declined notifications to renters
 * - Sending payment method updated notifications to owners
 */
class PaymentEmailService {
  constructor() {
    this.emailClient = new EmailClient();
    this.templateManager = new TemplateManager();
    this.initialized = false;
  }

  /**
   * Initialize the payment email service
   * @returns {Promise<void>}
   */
  async initialize() {
    if (this.initialized) return;

    await Promise.all([
      this.emailClient.initialize(),
      this.templateManager.initialize(),
    ]);

    this.initialized = true;
    console.log("Payment Email Service initialized successfully");
  }

  /**
   * Send payment declined notification to renter
   * @param {string} renterEmail - Renter's email address
   * @param {Object} params - Email parameters
   * @param {string} params.renterFirstName - Renter's first name
   * @param {string} params.itemName - Item name
   * @param {string} params.declineReason - User-friendly decline reason
   * @param {string} params.rentalId - Rental ID
   * @param {string} params.updatePaymentUrl - URL to update payment method
   * @returns {Promise<{success: boolean, messageId?: string, error?: string}>}
   */
  async sendPaymentDeclinedNotification(renterEmail, params) {
    if (!this.initialized) {
      await this.initialize();
    }

    try {
      const {
        renterFirstName,
        itemName,
        declineReason,
        updatePaymentUrl,
      } = params;

      const variables = {
        renterFirstName: renterFirstName || "there",
        itemName: itemName || "the item",
        declineReason: declineReason || "Your payment could not be processed.",
        updatePaymentUrl: updatePaymentUrl,
      };

      const htmlContent = await this.templateManager.renderTemplate(
        "paymentDeclinedToRenter",
        variables
      );

      return await this.emailClient.sendEmail(
        renterEmail,
        `Action Required: Payment Issue - ${itemName || "Your Rental"}`,
        htmlContent
      );
    } catch (error) {
      console.error("Failed to send payment declined notification:", error);
      return { success: false, error: error.message };
    }
  }

  /**
   * Send payment method updated notification to owner
   * @param {string} ownerEmail - Owner's email address
   * @param {Object} params - Email parameters
   * @param {string} params.ownerFirstName - Owner's first name
   * @param {string} params.itemName - Item name
   * @param {string} params.rentalId - Rental ID
   * @param {string} params.approvalUrl - URL to approve the rental
   * @returns {Promise<{success: boolean, messageId?: string, error?: string}>}
   */
  async sendPaymentMethodUpdatedNotification(ownerEmail, params) {
    if (!this.initialized) {
      await this.initialize();
    }

    try {
      const { ownerFirstName, itemName, approvalUrl } = params;

      const variables = {
        ownerFirstName: ownerFirstName || "there",
        itemName: itemName || "the item",
        approvalUrl: approvalUrl,
      };

      const htmlContent = await this.templateManager.renderTemplate(
        "paymentMethodUpdatedToOwner",
        variables
      );

      return await this.emailClient.sendEmail(
        ownerEmail,
        `Payment Method Updated - ${itemName || "Your Item"}`,
        htmlContent
      );
    } catch (error) {
      console.error("Failed to send payment method updated notification:", error);
      return { success: false, error: error.message };
    }
  }

  /**
   * Send payout failed notification to owner
   * @param {string} ownerEmail - Owner's email address
   * @param {Object} params - Email parameters
   * @param {string} params.ownerName - Owner's name
   * @param {number} params.payoutAmount - Payout amount in dollars
   * @param {string} params.failureMessage - User-friendly failure message
   * @param {string} params.actionRequired - Action the owner needs to take
   * @param {string} params.failureCode - The Stripe failure code
   * @param {boolean} params.requiresBankUpdate - Whether bank account update is needed
   * @param {string} params.payoutSettingsUrl - URL to payout settings
   * @returns {Promise<{success: boolean, messageId?: string, error?: string}>}
   */
  async sendPayoutFailedNotification(ownerEmail, params) {
    if (!this.initialized) {
      await this.initialize();
    }

    try {
      const {
        ownerName,
        payoutAmount,
        failureMessage,
        actionRequired,
        failureCode,
        requiresBankUpdate,
        payoutSettingsUrl,
      } = params;

      const variables = {
        ownerName: ownerName || "there",
        payoutAmount: payoutAmount?.toFixed(2) || "0.00",
        failureMessage: failureMessage || "There was an issue with your payout.",
        actionRequired: actionRequired || "Please check your bank account details.",
        failureCode: failureCode || "unknown",
        requiresBankUpdate: requiresBankUpdate || false,
        payoutSettingsUrl: payoutSettingsUrl || process.env.FRONTEND_URL + "/settings/payouts",
      };

      const htmlContent = await this.templateManager.renderTemplate(
        "payoutFailedToOwner",
        variables
      );

      return await this.emailClient.sendEmail(
        ownerEmail,
        "Action Required: Payout Issue - Village Share",
        htmlContent
      );
    } catch (error) {
      console.error("Failed to send payout failed notification:", error);
      return { success: false, error: error.message };
    }
  }
}

module.exports = PaymentEmailService;