import {describe, it, expect, beforeEach, afterEach} from 'bun:test';
import {RtmpPush} from '../src/RtmpPush';

describe('RtmpPush', () => {
  let rtmpPush: RtmpPush;
  const mockMediaSourceUri = 'https://example.com/test-video.ts';
  const mockRtmpIngestUri = 'rtmp://ingest.example.com:80/ingest';

  beforeEach(() => {
    rtmpPush = new RtmpPush(mockMediaSourceUri, mockRtmpIngestUri);
  });

  afterEach(() => {
    // Clean up any running processes
    if (rtmpPush.isRunning()) {
      rtmpPush.stop();
    }
  });

  describe('Constructor', () => {
    it('should create instance with correct properties', () => {
      expect(rtmpPush).toBeInstanceOf(RtmpPush);
      expect(rtmpPush.mediaSourceUri).toBe(mockMediaSourceUri);
      expect(rtmpPush.rtmpIngestUri).toBe(mockRtmpIngestUri);
    });

    it('should handle empty strings', () => {
      const emptyRtmpPush = new RtmpPush('', '');
      expect(emptyRtmpPush.mediaSourceUri).toBe('');
      expect(emptyRtmpPush.rtmpIngestUri).toBe('');
    });

    it('should handle special characters in URIs', () => {
      const specialMediaUri = 'https://example.com/video with spaces & special chars!.ts';
      const specialRtmpUri = 'rtmp://ingest.example.com:80/ingest/path with spaces';

      const specialRtmpPush = new RtmpPush(specialMediaUri, specialRtmpUri);
      expect(specialRtmpPush.mediaSourceUri).toBe(specialMediaUri);
      expect(specialRtmpPush.rtmpIngestUri).toBe(specialRtmpUri);
    });

    it('should handle very long URIs', () => {
      const longMediaUri = 'https://example.com/' + 'a'.repeat(1000) + '.ts';
      const longRtmpUri = 'rtmp://ingest.example.com:80/ingest/' + 'b'.repeat(1000);

      const longRtmpPush = new RtmpPush(longMediaUri, longRtmpUri);
      expect(longRtmpPush.mediaSourceUri).toBe(longMediaUri);
      expect(longRtmpPush.rtmpIngestUri).toBe(longRtmpUri);
    });
  });

  describe('Getters', () => {
    it('should return correct mediaSourceUri', () => {
      expect(rtmpPush.mediaSourceUri).toBe(mockMediaSourceUri);
    });

    it('should return correct rtmpIngestUri', () => {
      expect(rtmpPush.rtmpIngestUri).toBe(mockRtmpIngestUri);
    });

    it('should return immutable values', () => {
      const originalMediaUri = rtmpPush.mediaSourceUri;
      const originalRtmpUri = rtmpPush.rtmpIngestUri;

      // These should not change the internal state
      expect(rtmpPush.mediaSourceUri).toBe(originalMediaUri);
      expect(rtmpPush.rtmpIngestUri).toBe(originalRtmpUri);
    });
  });

  describe('isRunning() method', () => {
    it('should return false when no process is started', () => {
      expect(rtmpPush.isRunning()).toBe(false);
    });

    it('should return false for new instances', () => {
      const newRtmpPush = new RtmpPush('https://example.com/video.ts', 'rtmp://example.com/ingest');
      expect(newRtmpPush.isRunning()).toBe(false);
    });
  });

  describe('stop() method', () => {
    it('should handle stopping when no process is running', () => {
      expect(rtmpPush.isRunning()).toBe(false);

      const result = rtmpPush.stop();

      expect(result).toBe(rtmpPush);
      expect(rtmpPush.isRunning()).toBe(false);
    });

    it('should be chainable', () => {
      const result = rtmpPush.stop();
      expect(result).toBe(rtmpPush);
    });

    it('should handle multiple stop calls', () => {
      rtmpPush.stop();
      const result = rtmpPush.stop();
      expect(result).toBe(rtmpPush);
      expect(rtmpPush.isRunning()).toBe(false);
    });
  });

  describe('URI Construction Logic', () => {
    it('should construct valid RTMP URIs', () => {
      const streamKey = 'test-stream-key';
      const capabilities = ['h264', 'aac', 'stereo'];

      const expectedUri = `${mockRtmpIngestUri}/${streamKey};capabilities=${capabilities.join(',')};tags=`;

      // The URI should be properly formatted
      expect(expectedUri).toContain(streamKey);
      expect(expectedUri).toContain(capabilities.join(','));
      expect(expectedUri).toContain(';capabilities=');
      expect(expectedUri).toContain(';tags=');
    });

    it('should handle various stream key formats', () => {
      const testCases = ['simple-key', 'key_with_underscores', 'key-with-dashes', 'key123', 'key!@#$%^&*()', 'key with spaces', 'key.with.dots'];

      testCases.forEach(streamKey => {
        const capabilities = ['h264'];
        const expectedIngestUri = `${mockRtmpIngestUri}/${streamKey};capabilities=${capabilities.join(',')};tags=`;

        expect(expectedIngestUri).toContain(streamKey);
        expect(expectedIngestUri).toContain(';capabilities=h264;tags=');
      });
    });

    it('should handle empty capabilities array', () => {
      const streamKey = 'test-stream';
      const capabilities: string[] = [];

      const expectedIngestUri = `${mockRtmpIngestUri}/${streamKey};capabilities=;tags=`;

      expect(expectedIngestUri).toContain(streamKey);
      expect(expectedIngestUri).toContain(';capabilities=;tags=');
    });

    it('should handle single capability', () => {
      const streamKey = 'test-stream';
      const capabilities = ['h264'];

      const expectedIngestUri = `${mockRtmpIngestUri}/${streamKey};capabilities=h264;tags=`;

      expect(expectedIngestUri).toContain(streamKey);
      expect(expectedIngestUri).toContain(';capabilities=h264;tags=');
    });

    it('should handle multiple capabilities', () => {
      const streamKey = 'test-stream';
      const capabilities = ['h264', 'aac', 'stereo', '1080p'];

      const expectedIngestUri = `${mockRtmpIngestUri}/${streamKey};capabilities=${capabilities.join(',')};tags=`;

      expect(expectedIngestUri).toContain(streamKey);
      expect(expectedIngestUri).toContain(';capabilities=h264,aac,stereo,1080p;tags=');
    });

    it('should handle special characters in stream key', () => {
      const streamKey = 'test-stream-with-special-chars!@#$%^&*()';
      const capabilities = ['h264'];

      const expectedIngestUri = `${mockRtmpIngestUri}/${streamKey};capabilities=${capabilities.join(',')};tags=`;

      expect(expectedIngestUri).toContain(streamKey);
      expect(expectedIngestUri).toContain(';capabilities=h264;tags=');
    });

    it('should handle special characters in capabilities', () => {
      const streamKey = 'test-stream';
      const capabilities = ['h.264', 'aac-lc', 'stereo_audio'];

      const expectedIngestUri = `${mockRtmpIngestUri}/${streamKey};capabilities=${capabilities.join(',')};tags=`;

      expect(expectedIngestUri).toContain(streamKey);
      expect(expectedIngestUri).toContain(';capabilities=h.264,aac-lc,stereo_audio;tags=');
    });

    it('should handle very long stream keys', () => {
      const streamKey = 'a'.repeat(1000);
      const capabilities = ['h264'];

      const expectedIngestUri = `${mockRtmpIngestUri}/${streamKey};capabilities=${capabilities.join(',')};tags=`;

      expect(expectedIngestUri).toContain(streamKey);
      expect(expectedIngestUri).toContain(';capabilities=h264;tags=');
    });

    it('should handle very long capability lists', () => {
      const streamKey = 'test-stream';
      const capabilities = Array.from({length: 100}, (_, i) => `capability-${i}`);

      const expectedIngestUri = `${mockRtmpIngestUri}/${streamKey};capabilities=${capabilities.join(',')};tags=`;

      expect(expectedIngestUri).toContain(streamKey);
      expect(expectedIngestUri).toContain(';capabilities=');
      expect(expectedIngestUri).toContain(';tags=');
      expect(expectedIngestUri).toContain('capability-0');
      expect(expectedIngestUri).toContain('capability-99');
    });
  });

  describe('Method Chaining', () => {
    it('should support method chaining', () => {
      const result = rtmpPush.stop();
      expect(result).toBe(rtmpPush);

      // Should be able to chain multiple calls
      const chainedResult = rtmpPush.stop().stop().stop();
      expect(chainedResult).toBe(rtmpPush);
    });
  });

  describe('Instance Independence', () => {
    it('should maintain separate state for different instances', () => {
      const rtmpPush1 = new RtmpPush('https://example1.com/video.ts', 'rtmp://example1.com/ingest');
      const rtmpPush2 = new RtmpPush('https://example2.com/video.ts', 'rtmp://example2.com/ingest');

      expect(rtmpPush1.mediaSourceUri).toBe('https://example1.com/video.ts');
      expect(rtmpPush2.mediaSourceUri).toBe('https://example2.com/video.ts');
      expect(rtmpPush1.rtmpIngestUri).toBe('rtmp://example1.com/ingest');
      expect(rtmpPush2.rtmpIngestUri).toBe('rtmp://example2.com/ingest');

      expect(rtmpPush1.isRunning()).toBe(false);
      expect(rtmpPush2.isRunning()).toBe(false);
    });
  });

  describe('start() method basic functionality', () => {
    it('should be chainable', () => {
      const streamKey = 'test-stream';
      const capabilities = ['h264'];

      try {
        const result = rtmpPush.start(streamKey, capabilities);
        expect(result).toBe(rtmpPush);
      } catch (error) {
        // If ffmpeg is not available, that's expected
        expect(error).toBeInstanceOf(Error);
      }
    });

    it('should handle invalid parameters gracefully', () => {
      try {
        rtmpPush.start('', []);
        // If it doesn't throw, it should at least not be running
        expect(rtmpPush.isRunning()).toBe(false);
      } catch (error) {
        // Expected to fail
        expect(error).toBeInstanceOf(Error);
      }
    });
  });
});