interface AbacatePayConfig {
  apiKey: string;
  baseUrl?: string;
}

interface CreateBillingParams {
  amount: number;
  metadata?: {
    donorName?: string;
    donorEmail?: string;
    message?: string;
  };
  returnUrl?: string;
  completionUrl?: string;
}

interface BillingResponse {
  id: string;
  amount: number;
  status: "PENDING" | "PAID" | "EXPIRED" | "CANCELLED";
  brCode?: string; // Código PIX copia-e-cola
  brCodeBase64?: string; // QR Code em Base64
  expiresAt?: string;
  createdAt: string;
}

interface CreatePixParams {
  amount: number; // em centavos
  description: string;
  expiresIn?: number; // em segundos, padrão 600 (10 min)
  customer?: {
    name: string;
    email?: string;
    cellphone?: string;
    taxId?: string;
  };
}

class AbacatePayClient {
  private config: AbacatePayConfig;

  constructor(config: AbacatePayConfig) {
    this.config = {
      ...config,
      baseUrl: config.baseUrl || "https://api.abacatepay.com/v1",
    };
  }

  async createPixQrCode(params: CreatePixParams): Promise<BillingResponse> {
    const requestBody: any = {
      amount: params.amount,
      expiresIn: params.expiresIn || 600, // 10 minutos por padrão
      description: params.description,
    };

    if (params.customer) {
      requestBody.customer = params.customer;
    }

    // Request body logging removido para segurança LGPD
    // Dados sensíveis não devem aparecer em logs

    const response = await fetch(`${this.config.baseUrl}/pixQrCode/create`, {
      method: "POST",
      headers: {
        Authorization: `Bearer ${this.config.apiKey}`,
        "Content-Type": "application/json",
      },
      body: JSON.stringify(requestBody),
    });

    if (!response.ok) {
      const errorData = await response.json().catch(() => ({}));
      console.error("PIX Error:", errorData);
      throw new Error(`Failed to create PIX: ${JSON.stringify(errorData)}`);
    }

    const result = await response.json();

    if (result.error) {
      throw new Error(result.error);
    }

    return result.data;
  }

  async createBilling(params: CreateBillingParams): Promise<BillingResponse> {
    const response = await fetch(`${this.config.baseUrl}/billing`, {
      method: "POST",
      headers: {
        Authorization: `Bearer ${this.config.apiKey}`,
        "Content-Type": "application/json",
      },
      body: JSON.stringify({
        amount: params.amount * 100, // centavos
        metadata: params.metadata,
        return_url: params.returnUrl,
        completion_url: params.completionUrl,
      }),
    });

    if (!response.ok) {
      const errorData = await response.json().catch(() => ({}));
      throw new Error(
        `Failed to create billing: ${errorData.message || response.statusText}`,
      );
    }

    return response.json();
  }

  async getBillingStatus(billingId: string): Promise<BillingResponse> {
    const response = await fetch(
      `${this.config.baseUrl}/billing/${billingId}`,
      {
        headers: {
          Authorization: `Bearer ${this.config.apiKey}`,
        },
      },
    );

    if (!response.ok) {
      const errorData = await response.json().catch(() => ({}));
      throw new Error(
        `Failed to get billing status: ${
          errorData.message || response.statusText
        }`,
      );
    }

    const result = await response.json();

    // AbacatePay retorna { error: null, data: { ... } }
    if (result.error) {
      throw new Error(result.error);
    }

    // Retornar apenas o data
    return result.data;
  }

  async getPixStatus(pixId: string): Promise<BillingResponse> {
    // AbacatePay usa o endpoint /billing/{id} para todos os tipos de billing
    const response = await fetch(`${this.config.baseUrl}/billing/${pixId}`, {
      headers: {
        Authorization: `Bearer ${this.config.apiKey}`,
      },
    });

    if (!response.ok) {
      const errorData = await response.json().catch(() => ({}));
      throw new Error(
        `Failed to get PIX status: ${errorData.message || response.statusText}`,
      );
    }

    const result = await response.json();

    if (result.error) {
      throw new Error(result.error);
    }

    return result.data;
  }

  verifyWebhookSignature(_payload: string, _signature: string): boolean {
    // Método mantido para compatibilidade, mas validação agora é feita via query param
    return true;
  }
}

// Instância do cliente (será configurada com variáveis de ambiente)
const isProduction = process.env.NODE_ENV === "production";
const apiKey = isProduction
  ? process.env.ABACATE_APIKEY || "demo_key"
  : process.env.ABACATE_TEST_APIKEY || "demo_key";

// Log das variáveis de ambiente (sem expor valores sensíveis)
console.log("\n🔧 Configuração do AbacatePay:");
console.log(`📊 Environment: ${isProduction ? "PRODUCTION" : "TEST"}`);
console.log(`📊 API Key: ${apiKey ? "✅ Configurada" : "❌ NÃO CONFIGURADA"}`);
console.log(
  `📊 Webhook Secret: ${
    process.env.ABACATEPAY_WEBHOOK_SECRET
      ? "✅ Configurada"
      : "❌ NÃO CONFIGURADA"
  }`,
);
console.log("🔧 ==========================================\n");

export const abacatePay = new AbacatePayClient({
  apiKey,
});

export type { CreateBillingParams, BillingResponse };