import { describe, it, expect, beforeAll, afterAll } from 'vitest';
import { readFileSync } from 'fs';
import { join } from 'path';
import { BinectClient } from '../src/client.js';
import { DocumentStatus } from '../src/types.js';

/**
 * End-to-end test for Binect API integration.
 *
 * Requires environment variables:
 *   BINECT_USERNAME - Binect account email
 *   BINECT_PASSWORD - Binect account password
 *
 * Run with: BINECT_USERNAME=user@example.com BINECT_PASSWORD=pass npm test
 */
describe('E2E: Document Upload and Delete', () => {
  const username = process.env['BINECT_USERNAME'];
  const password = process.env['BINECT_PASSWORD'];

  // Skip tests if credentials not provided
  const runTests = username && password;

  let client: BinectClient;
  let uploadedDocumentId: string | null = null;

  beforeAll(() => {
    if (runTests) {
      client = new BinectClient({ username, password });
    }
  });

  afterAll(async () => {
    // Cleanup: ensure document is deleted even if test fails
    if (runTests && uploadedDocumentId && client) {
      try {
        await client.documents.delete(uploadedDocumentId);
      } catch {
        // Ignore cleanup errors
      }
    }
  });

  it.skipIf(!runTests)('should upload a PDF document', async () => {
    // Read the test PDF file
    const pdfPath = join(process.cwd(), 'examples/din5008/260114-brief-testbriefBinectJs.pdf');
    const pdfBuffer = readFileSync(pdfPath);
    const pdfContent = pdfBuffer.toString('base64');

    // Upload the document
    const document = await client.documents.upload({
      content: pdfContent,
      filename: '260114-brief-testbriefBinectJs.pdf',
      color: false,
      simplex: false, // false = duplex (double-sided)
      envelope: 'DINLANG',
      franking: 'STANDARD_FRANKING',
    });

    // Debug: log the full response
    console.log('Upload response:', JSON.stringify(document, null, 2));

    // Store document ID for cleanup (API returns numeric id)
    uploadedDocumentId = String(document.id);

    // Verify upload succeeded
    expect(document.id).toBeTruthy();
    expect(typeof document.id).toBe('number');
    expect(document.numberOfPages).toBeGreaterThan(0);

    // Status should be either IN_PREPARATION (1) or SHIPPABLE (2) or ERRONEOUS (7)
    expect([
      DocumentStatus.IN_PREPARATION,
      DocumentStatus.SHIPPABLE,
      DocumentStatus.ERRONEOUS,
    ]).toContain(document.status.code);

    console.log(`Uploaded document: ${document.id}, status: ${document.status.code} (${document.status.text}), pages: ${document.numberOfPages}`);
  });

  it.skipIf(!runTests)('should retrieve the uploaded document', async () => {
    expect(uploadedDocumentId).toBeTruthy();

    const document = await client.documents.get(uploadedDocumentId!);

    expect(String(document.id)).toBe(uploadedDocumentId);
    expect(document.numberOfPages).toBeGreaterThan(0);

    console.log(`Retrieved document: ${document.id}, status: ${document.status.code} (${document.status.text})`);
  });

  it.skipIf(!runTests)('should delete the uploaded document', async () => {
    expect(uploadedDocumentId).toBeTruthy();

    // Delete the document
    await client.documents.delete(uploadedDocumentId!);

    console.log(`Deleted document: ${uploadedDocumentId}`);

    // Mark as deleted so afterAll doesn't try to delete again
    uploadedDocumentId = null;

    // Verify deletion by trying to get the document (should fail)
    try {
      await client.documents.get(uploadedDocumentId!);
      // If we get here, the document wasn't deleted
      expect.fail('Document should have been deleted');
    } catch (error) {
      // Expected: document not found
      expect(error).toBeDefined();
    }
  });

  it.skipIf(runTests)('skipped: no credentials provided', () => {
    console.log('E2E tests skipped: Set BINECT_USERNAME and BINECT_PASSWORD environment variables to run');
    expect(true).toBe(true);
  });
});

describe('E2E: Document Send and Cancel', () => {
  const username = process.env['BINECT_USERNAME'];
  const password = process.env['BINECT_PASSWORD'];

  const runTests = username && password;

  let client: BinectClient;
  let uploadedDocumentId: string | null = null;

  beforeAll(() => {
    if (runTests) {
      client = new BinectClient({ username, password });
    }
  });

  afterAll(async () => {
    // Cleanup: try to delete the document if it still exists
    if (runTests && uploadedDocumentId && client) {
      try {
        await client.documents.delete(uploadedDocumentId);
        console.log(`Cleanup: Deleted document ${uploadedDocumentId}`);
      } catch {
        // Document may already be deleted or in a state that can't be deleted
        console.log(`Cleanup: Could not delete document ${uploadedDocumentId} (may already be processed)`);
      }
    }
  });

  it.skipIf(!runTests)('should upload and attempt to send a document', async () => {
    // Step 1: Upload the document
    const pdfPath = join(process.cwd(), 'examples/din5008/260114-brief-testbriefBinectJs.pdf');
    const pdfBuffer = readFileSync(pdfPath);
    const pdfContent = pdfBuffer.toString('base64');

    const document = await client.documents.upload({
      content: pdfContent,
      filename: 'send-cancel-test.pdf',
      color: false,
      simplex: false,
      envelope: 'DINLANG',
      franking: 'STANDARD_FRANKING',
    });

    uploadedDocumentId = String(document.id);
    console.log(`Uploaded document: ${document.id}, status: ${document.status.code} (${document.status.text})`);

    expect(document.id).toBeTruthy();
    expect(document.status.code).toBe(DocumentStatus.SHIPPABLE);

    // Step 2: Try to send the document (announce for delivery)
    // Note: This may fail with "insufficient funds" if the test account has no balance
    try {
      const sending = await client.sendings.send(uploadedDocumentId);
      console.log(`Sent document: ${uploadedDocumentId}, response:`, JSON.stringify(sending, null, 2));

      // After sending, status may be IN_PREPARATION (1) initially, then transitions to PRODUCTION_QUEUE (3)
      // Poll until document reaches a processable state
      let sentDocument = await client.documents.get(uploadedDocumentId);
      console.log(`After send - status: ${sentDocument.status.code} (${sentDocument.status.text})`);

      // Wait for status to transition from IN_PREPARATION to PRODUCTION_QUEUE
      const maxAttempts = 10;
      const pollIntervalMs = 1000;
      for (let attempt = 0; attempt < maxAttempts; attempt++) {
        if (sentDocument.status.code !== DocumentStatus.IN_PREPARATION) {
          break;
        }
        console.log(`Waiting for document to be processed (attempt ${attempt + 1}/${maxAttempts})...`);
        await new Promise(resolve => setTimeout(resolve, pollIntervalMs));
        sentDocument = await client.documents.get(uploadedDocumentId);
        console.log(`Status: ${sentDocument.status.code} (${sentDocument.status.text})`);
      }

      // Status should now be in production queue or beyond
      expect([
        DocumentStatus.PRODUCTION_QUEUE,
        DocumentStatus.PRINTING,
        DocumentStatus.SENT,
      ]).toContain(sentDocument.status.code);

      // Step 3: Cancel the sending (if still possible)
      // Cancel only works for PRODUCTION_QUEUE (3) or PRINTING (4)
      if (sentDocument.status.code === DocumentStatus.PRODUCTION_QUEUE ||
          sentDocument.status.code === DocumentStatus.PRINTING) {
        const cancelResult = await client.sendings.cancel(uploadedDocumentId);
        console.log(`Canceled document: ${uploadedDocumentId}, response:`, JSON.stringify(cancelResult, null, 2));

        // Verify the document is now canceled
        const canceledDocument = await client.documents.get(uploadedDocumentId);
        console.log(`After cancel - status: ${canceledDocument.status.code} (${canceledDocument.status.text})`);

        expect(canceledDocument.status.code).toBe(DocumentStatus.CANCELED);
      } else {
        console.log(`Document already processed (status ${sentDocument.status.code}), cannot cancel`);
      }
    } catch (error) {
      // The API may reject sending if account has insufficient balance
      // This is a valid business error, not a code bug
      const errorMessage = error instanceof Error ? error.message : String(error);
      if (errorMessage.includes('Guthaben') || errorMessage.includes('balance') || errorMessage.includes('2330')) {
        console.log('Send rejected due to insufficient account balance (expected for test accounts)');
        console.log('Error:', errorMessage);
        // This is acceptable - the SDK correctly communicated with the API
        expect(true).toBe(true);
      } else {
        // Re-throw unexpected errors
        throw error;
      }
    }
  });

  it.skipIf(runTests)('skipped: no credentials provided', () => {
    console.log('E2E tests skipped: Set BINECT_USERNAME and BINECT_PASSWORD environment variables to run');
    expect(true).toBe(true);
  });
});