import {
  notFoundMetadataResponse,
  serverErrorResponse,
  unauthorizedResponse,
} from "@b/utils/query";

import { 
  makeEwayRequest, 
  validateCurrency, 
  EWAY_TRANSACTION_TYPES,
  EwayTransparentRedirectRequest,
  EwayTransparentRedirectResponse,
  EwayError
} from "./utils";
import { models } from "@b/db";

const publicUrl = process.env.NEXT_PUBLIC_SITE_URL;
const isProduction = process.env.NODE_ENV === "production";

export const metadata: OperationObject = {
  summary: "Creates an eWAY payment",
  description:
    "Initiates an eWAY payment process for Asia-Pacific region. Supports multiple connection methods including Transparent Redirect, Direct Connection, and Responsive Shared Page.",
  operationId: "createEwayPayment",
  tags: ["Finance", "Payment"],
  requestBody: {
    description: "eWAY payment creation request",
    content: {
      "application/json": {
        schema: {
          type: "object",
          properties: {
            amount: {
              type: "number",
              description: "Payment amount in smallest currency unit",
              example: 10000,
            },
            currency: {
              type: "string",
              description: "Currency code (ISO 4217)",
              example: "AUD",
            },
            method: {
              type: "string",
              description: "eWAY connection method",
              enum: ["TransparentRedirect", "ResponsiveSharedPage", "Direct"],
              default: "TransparentRedirect",
            },
            transaction_type: {
              type: "string",
              description: "Transaction type",
              enum: ["Purchase", "MOTO", "Recurring"],
              default: "Purchase",
            },
            customer: {
              type: "object",
              description: "Customer information",
              properties: {
                first_name: { type: "string" },
                last_name: { type: "string" },
                email: { type: "string" },
                phone: { type: "string" },
                address: {
                  type: "object",
                  properties: {
                    street1: { type: "string" },
                    street2: { type: "string" },
                    city: { type: "string" },
                    state: { type: "string" },
                    postal_code: { type: "string" },
                    country: { type: "string", description: "2-letter country code" },
                  },
                },
              },
            },
            invoice_number: {
              type: "string",
              description: "Invoice number for reference",
            },
            description: {
              type: "string",
              description: "Payment description",
            },
            return_url: {
              type: "string",
              description: "URL to redirect after successful payment",
            },
            cancel_url: {
              type: "string",
              description: "URL to redirect after cancelled payment",
            },
          },
          required: ["amount", "currency"],
        },
      },
    },
  },
  responses: {
    200: {
      description: "eWAY payment created successfully",
      content: {
        "application/json": {
          schema: {
            type: "object",
            properties: {
              success: { type: "boolean" },
              data: {
                type: "object",
                properties: {
                  transaction_id: { type: "string" },
                  payment_url: { type: "string" },
                  access_code: { type: "string" },
                  status: { type: "string" },
                  gateway: { type: "string" },
                  amount: { type: "number" },
                  currency: { type: "string" },
                  reference: { type: "string" },
                },
              },
            },
          },
        },
      },
    },
    400: {
      description: "Invalid request parameters",
    },
    401: unauthorizedResponse,
    404: notFoundMetadataResponse("Transaction"),
    500: {
      description: "Internal server error",
      content: {
        "application/json": {
          schema: {
            type: "object",
            properties: {
              message: {
                type: "string",
                description: "Error message",
              },
            },
          },
        },
      },
    },
  },
  requiresAuth: true,
};

export default async (data: Handler) => {
  const { user, body } = data;
  if (!user?.id) {
    throw new Error("User not authenticated");
  }

  try {
    const {
      amount,
      currency,
      method = "TransparentRedirect",
      transaction_type = "Purchase",
      customer = {},
      invoice_number,
      description,
      return_url,
      cancel_url,
    } = body;

    // Validate required parameters
    if (!amount || amount <= 0) {
      throw new Error("Valid amount is required");
    }

    if (!currency) {
      throw new Error("Currency is required");
    }

    if (!validateCurrency(currency)) {
      throw new Error(`Currency ${currency} is not supported by eWAY`);
    }

    // Get user's wallet
    const wallet = await models.wallet.findOne({
      where: { userId: user.id, currency: currency.toUpperCase() },
    });

    if (!wallet) {
      throw new Error(`Wallet not found for currency ${currency}`);
    }

    // Get eWAY gateway configuration
    const gateway = await models.depositGateway.findOne({
      where: { alias: "eway", status: true },
    });

    if (!gateway) {
      throw new Error("eWAY gateway is not available");
    }

    // Check if currency is supported by the gateway
    if (!gateway.currencies.includes(currency.toUpperCase())) {
      throw new Error(`Currency ${currency} is not supported by eWAY gateway`);
    }

    // Calculate fees (gateway specific fee structure)
    const feePercentage = 0.029; // 2.9% base rate for eWAY
    const fixedFee = currency.toUpperCase() === "AUD" ? 30 : 0; // 30 cents for AUD
    const calculatedFee = Math.round(amount * feePercentage) + fixedFee;
    const totalAmount = amount + calculatedFee;

    // Generate unique reference
    const reference = `EWAY_${Date.now()}_${user.id}`;

    // Create transaction record
    const transaction = await models.transaction.create({
      userId: user.id,
      walletId: wallet.id,
      type: "DEPOSIT",
      status: "PENDING",
      amount: amount,
      fee: calculatedFee,
      description: description || "eWAY deposit",
      metadata: {
        gateway: "eway",
        method: method,
        transaction_type: transaction_type,
        currency: currency.toUpperCase(),
        reference: reference,
        invoice_number: invoice_number,
        customer: customer,
      },
      referenceId: reference,
    });

    // Prepare eWAY request
    const ewayRequest: EwayTransparentRedirectRequest = {
      Customer: {
        Reference: reference,
        FirstName: customer.first_name || "",
        LastName: customer.last_name || "",
        Email: customer.email || user.email || "",
        Phone: customer.phone || "",
        Street1: customer.address?.street1 || "",
        Street2: customer.address?.street2 || "",
        City: customer.address?.city || "",
        State: customer.address?.state || "",
        PostalCode: customer.address?.postal_code || "",
        Country: customer.address?.country?.toLowerCase() || "au",
      },
      Payment: {
        TotalAmount: totalAmount, // eWAY expects amount in cents
        InvoiceNumber: invoice_number || reference,
        InvoiceDescription: description || "Payment via eWAY",
        InvoiceReference: reference,
        CurrencyCode: currency.toUpperCase(),
      },
      RedirectUrl: return_url || `${publicUrl}/finance/deposit/eway/success?ref=${reference}`,
      CancelUrl: cancel_url || `${publicUrl}/finance/deposit/eway/cancel?ref=${reference}`,
      Method: "ProcessPayment",
      TransactionType: EWAY_TRANSACTION_TYPES[transaction_type.toUpperCase()] || "Purchase",
      DeviceID: "v5-platform",
      CustomerIP: "127.0.0.1", // Will be set from request headers if available
    };

    // Add optional fields based on method
    if (method === "ResponsiveSharedPage") {
      // Use Responsive Shared Page endpoint
      const response = await makeEwayRequest("/CreateAccessCode", "POST", ewayRequest) as EwayTransparentRedirectResponse;
      
      if (response.Errors) {
        throw new EwayError("eWAY API Error", 400, { errors: response.Errors });
      }

      // Update transaction with eWAY details
      await transaction.update({
        metadata: {
          ...transaction.metadata,
          eway_access_code: response.AccessCode,
          eway_form_url: response.FormActionURL,
        },
      });

      return {
        success: true,
        data: {
          transaction_id: transaction.id,
          payment_url: response.FormActionURL,
          access_code: response.AccessCode,
          status: "PENDING",
          gateway: "eway",
          amount: amount,
          currency: currency.toUpperCase(),
          reference: reference,
          method: method,
        },
      };
    } else {
      // Use Transparent Redirect (default)
      const response = await makeEwayRequest("/CreateAccessCodeShared", "POST", ewayRequest) as EwayTransparentRedirectResponse;
      
      if (response.Errors) {
        throw new EwayError("eWAY API Error", 400, { errors: response.Errors });
      }

      // Update transaction with eWAY details
      await transaction.update({
        metadata: {
          ...transaction.metadata,
          eway_access_code: response.AccessCode,
          eway_form_url: response.FormActionURL,
        },
      });

      return {
        success: true,
        data: {
          transaction_id: transaction.id,
          payment_url: response.FormActionURL,
          access_code: response.AccessCode,
          status: "PENDING",
          gateway: "eway",
          amount: amount,
          currency: currency.toUpperCase(),
          reference: reference,
          method: method,
        },
      };
    }

  } catch (error) {
    console.error("eWAY payment creation error:", error);
    
    if (error instanceof EwayError) {
      throw new Error(`eWAY Error: ${error.message}`);
    }
    
    throw new Error(error.message || "Failed to create eWAY payment");
  }
};