import { describe, it, expect, vi, beforeEach } from 'vitest';

const path = require('path');

describe('renderer.js - escapeHtml', () => {
  let escapeHtml;

  beforeEach(() => {
    escapeHtml = (str) => {
      const div = document.createElement('div');
      div.textContent = str;
      return div.innerHTML;
    };
  });

  it('escapes angle brackets', () => {
    expect(escapeHtml('<script>')).toBe('&lt;script&gt;');
  });

  it('escapes ampersands', () => {
    expect(escapeHtml('a & b')).toBe('a &amp; b');
  });

  it('escapes full HTML tag', () => {
    const result = escapeHtml('<div onclick="alert(1)">');
    expect(result).toContain('&lt;div');
    expect(result).toContain('onclick=');
  });

  it('handles plain text unchanged', () => {
    expect(escapeHtml('Hello World')).toBe('Hello World');
  });

  it('handles empty string', () => {
    expect(escapeHtml('')).toBe('');
  });

  it('handles special characters', () => {
    const result = escapeHtml('<>&');
    expect(result).toBe('&lt;&gt;&amp;');
  });

  it('escapes XSS payload', () => {
    const payload = '<img src=x onerror=alert(1)>';
    const result = escapeHtml(payload);
    expect(result).not.toContain('<img');
    expect(result).toContain('&lt;img');
  });

  it('handles unicode characters', () => {
    expect(escapeHtml('Hello \u4e16\u754c')).toBe('Hello \u4e16\u754c');
  });

  it('handles newlines and tabs', () => {
    const result = escapeHtml('line1\nline2\ttab');
    expect(result).toBe('line1\nline2\ttab');
  });
});

describe('main.js - writeLog', () => {
  let writeLog, logFilePath;

  beforeEach(() => {
    vi.clearAllMocks();
    const fs = require('fs');
    fs.writeFileSync = vi.fn();
    fs.appendFileSync = vi.fn();
    logFilePath = path.join(globalThis.__dirname, 'app-debug.log');

    writeLog = (message) => {
      const timestamp = new Date().toISOString();
      const logEntry = `[${timestamp}] ${message}\n`;
      fs.appendFileSync(logFilePath, logEntry);
    };
  });

  it('writes log entry with timestamp', () => {
    const fs = require('fs');
    writeLog('Test message');
    expect(fs.appendFileSync).toHaveBeenCalled();
    const callArg = fs.appendFileSync.mock.calls[0][1];
    expect(callArg).toMatch(/\[\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}/);
    expect(callArg).toContain('Test message');
  });

  it('handles empty message', () => {
    const fs = require('fs');
    writeLog('');
    expect(fs.appendFileSync).toHaveBeenCalled();
  });
});

describe('main.js - writeAuditLog', () => {
  let writeAuditLog;

  beforeEach(() => {
    vi.clearAllMocks();
    const fs = require('fs');
    fs.appendFileSync = vi.fn();

    writeAuditLog = (directoryPath, action, details) => {
      const auditFileName = '.audit';
      const auditFilePath = path.join(directoryPath, auditFileName);

      const timestamp = new Date().toISOString();
      const auditEntry = {
        timestamp: timestamp,
        action: action,
        details: details,
      };

      const entryString = JSON.stringify(auditEntry) + '\n';
      fs.appendFileSync(auditFilePath, entryString);
    };
  });

  it('writes audit entry as JSON', () => {
    const fs = require('fs');
    writeAuditLog('/path/to/dir', 'rename_file', { oldName: 'a.mp4', newName: 'b.mp4' });
    expect(fs.appendFileSync).toHaveBeenCalledWith(
      '/path/to/dir/.audit',
      expect.stringContaining('"action":"rename_file"')
    );
  });

  it('includes timestamp in audit entry', () => {
    const fs = require('fs');
    writeAuditLog('/path', 'move_file', {});
    const callArg = fs.appendFileSync.mock.calls[0][1];
    const parsed = JSON.parse(callArg.trim());
    expect(parsed.timestamp).toMatch(/\d{4}-\d{2}-\d{2}T/);
  });

  it('writes to correct path', () => {
    const fs = require('fs');
    writeAuditLog('/custom/path', 'action', {});
    expect(fs.appendFileSync).toHaveBeenCalledWith('/custom/path/.audit', expect.any(String));
  });
});

describe('main.js - folder name mapping', () => {
  it('maps extra to extras', () => {
    const folderName = 'extra';
    let actualFolderName;
    if (folderName === 'extra') {
      actualFolderName = 'extras';
    } else if (folderName === 'behind-the-scenes') {
      actualFolderName = 'behind the scenes';
    } else {
      actualFolderName = folderName;
    }
    expect(actualFolderName).toBe('extras');
  });

  it('maps behind-the-scenes to behind the scenes', () => {
    const folderName = 'behind-the-scenes';
    let actualFolderName;
    if (folderName === 'extra') {
      actualFolderName = 'extras';
    } else if (folderName === 'behind-the-scenes') {
      actualFolderName = 'behind the scenes';
    } else {
      actualFolderName = folderName;
    }
    expect(actualFolderName).toBe('behind the scenes');
  });

  it('keeps commentary as-is', () => {
    const folderName = 'commentary';
    let actualFolderName;
    if (folderName === 'extra') {
      actualFolderName = 'extras';
    } else if (folderName === 'behind-the-scenes') {
      actualFolderName = 'behind the scenes';
    } else {
      actualFolderName = folderName;
    }
    expect(actualFolderName).toBe('commentary');
  });

  it('keeps delete as-is', () => {
    const folderName = 'delete';
    let actualFolderName;
    if (folderName === 'extra') {
      actualFolderName = 'extras';
    } else if (folderName === 'behind-the-scenes') {
      actualFolderName = 'behind the scenes';
    } else {
      actualFolderName = folderName;
    }
    expect(actualFolderName).toBe('delete');
  });

  it('validates folder names', () => {
    const validFolders = ['extra', 'behind-the-scenes', 'commentary', 'delete'];
    expect(validFolders.includes('extra')).toBe(true);
    expect(validFolders.includes('invalid')).toBe(false);
    expect(validFolders.includes('')).toBe(false);
  });
});

describe('main.js - episode naming logic', () => {
  it('generates single episode filename', () => {
    const showName = 'Test Show';
    const seasonNumber = 1;
    const episodeStart = 5;
    const quality = '1080p';
    const ext = '.mp4';

    const seasonNum = String(seasonNumber).padStart(2, '0');
    const epNum = String(episodeStart).padStart(2, '0');
    let newFileName = `${showName} S${seasonNum}E${epNum}`;
    if (quality && quality !== 'N/A' && quality !== '-') {
      newFileName += ` - ${quality}`;
    }
    newFileName += ext;

    expect(newFileName).toBe('Test Show S01E05 - 1080p.mp4');
  });

  it('generates range episode filename', () => {
    const showName = 'Test Show';
    const seasonNumber = 2;
    const episodeStart = 1;
    const episodeEnd = 3;
    const ext = '.mkv';

    const seasonNum = String(seasonNumber).padStart(2, '0');
    const startEpNum = String(episodeStart).padStart(2, '0');
    const endEpNum = String(episodeEnd).padStart(2, '0');

    let newFileName = `${showName} S${seasonNum}E${startEpNum}-E${endEpNum}`;
    newFileName += ext;

    expect(newFileName).toBe('Test Show S02E01-E03.mkv');
  });

  it('skips quality when N/A', () => {
    const showName = 'Show';
    const seasonNumber = 1;
    const episodeStart = 1;
    const quality = 'N/A';
    const ext = '.mp4';

    const seasonNum = String(seasonNumber).padStart(2, '0');
    const epNum = String(episodeStart).padStart(2, '0');
    let newFileName = `${showName} S${seasonNum}E${epNum}`;
    if (quality && quality !== 'N/A' && quality !== '-') {
      newFileName += ` - ${quality}`;
    }
    newFileName += ext;

    expect(newFileName).toBe('Show S01E01.mp4');
  });

  it('skips quality when dash', () => {
    const showName = 'Show';
    const quality = '-';
    const ext = '.mp4';
    const seasonNum = '01';
    const epNum = '01';

    let newFileName = `${showName} S${seasonNum}E${epNum}`;
    if (quality && quality !== 'N/A' && quality !== '-') {
      newFileName += ` - ${quality}`;
    }
    newFileName += ext;

    expect(newFileName).toBe('Show S01E01.mp4');
  });

  it('handles show name with tvdbid bracket', () => {
    const showFolderName = 'Test Show [tvdbid-12345]';
    let showName = showFolderName.replace(/\s*\[tvdbid-[^\]]+\]/, '').trim();
    expect(showName).toBe('Test Show');
  });

  it('handles show name with semicolons', () => {
    const showFolderName = ';;;Test Show';
    let showName = showFolderName.replace(/\s*\[tvdbid-[^\]]+\]/, '').trim();
    showName = showName.replace(/^[;:]+/, '').trim();
    expect(showName).toBe('Test Show');
  });

  it('extracts season number from Season XX format', () => {
    const seasonFolder = 'Season 05';
    const seasonMatch = seasonFolder.match(/(?:season\s*|s)(\d+)/i);
    expect(parseInt(seasonMatch[1])).toBe(5);
  });

  it('extracts season number from SXX format', () => {
    const seasonFolder = 'S03';
    const seasonMatch = seasonFolder.match(/(?:season\s*|s)(\d+)/i);
    expect(parseInt(seasonMatch[1])).toBe(3);
  });
});

describe('main.js - rename-file handler logic', () => {
  let fs;

  beforeEach(() => {
    vi.clearAllMocks();
    fs = require('fs');
    fs.existsSync = vi.fn(() => true);
    fs.accessSync = vi.fn();
    fs.renameSync = vi.fn();
  });

  it('returns error when original file does not exist', () => {
    fs.existsSync = vi.fn(() => false);
    const oldPath = '/path/to/file.mp4';
    let result;
    if (!fs.existsSync(oldPath)) {
      result = { success: false, error: 'Original file does not exist' };
    }
    expect(result.success).toBe(false);
    expect(result.error).toBe('Original file does not exist');
  });

  it('constructs new path correctly', () => {
    const oldPath = '/path/to/old.mp4';
    const newName = 'new.mp4';
    const newPath = path.join(path.dirname(oldPath), newName);
    expect(newPath).toBe('/path/to/new.mp4');
  });
});

describe('main.js - move-file-to-folder handler logic', () => {
  let fs;

  beforeEach(() => {
    vi.clearAllMocks();
    fs = require('fs');
    fs.existsSync = vi.fn(() => true);
  });

  it('returns error when file does not exist', () => {
    fs.existsSync = vi.fn(() => false);
    const filePath = '/nonexistent.mp4';
    let result;
    if (!fs.existsSync(filePath)) {
      result = { success: false, error: 'File does not exist' };
    }
    expect(result.success).toBe(false);
    expect(result.error).toBe('File does not exist');
  });

  it('returns error for invalid folder name', () => {
    const validFolders = ['extra', 'behind-the-scenes', 'commentary', 'delete'];
    const folderName = 'invalid-folder';
    let result;
    if (!validFolders.includes(folderName)) {
      result = { success: false, error: 'Invalid folder name' };
    }
    expect(result.success).toBe(false);
  });

  it('allows all valid folder names', () => {
    const validFolders = ['extra', 'behind-the-scenes', 'commentary', 'delete'];
    validFolders.forEach((fn) => {
      expect(validFolders.includes(fn)).toBe(true);
    });
  });
});