import { describe, it, expect, beforeEach } from 'vitest';
import { CommandParser, createCommandParser } from '../../src/commands/CommandParser';
import { CommandParseError } from '../../src/commands/CommandParser';

describe('CommandParser', () => {
  let parser: CommandParser;

  beforeEach(() => {
    parser = createCommandParser();
  });

  describe('parse', () => {
    it('should parse simple command without args', () => {
      const result = parser.parse('shuffle');
      
      expect(result.commandName).toBe('shuffle');
      expect(result.args.positional).toEqual([]);
      expect(result.args.flags).toEqual({});
    });

    it('should parse command with positional args', () => {
      const result = parser.parse('move card-1 discard');
      
      expect(result.commandName).toBe('move');
      expect(result.args.positional).toEqual(['card-1', 'discard']);
      expect(result.args.flags).toEqual({});
    });

    it('should parse command with multiple positional args', () => {
      const result = parser.parse('position p1 3 5');
      
      expect(result.commandName).toBe('position');
      expect(result.args.positional).toEqual(['p1', '3', '5']);
    });

    it('should parse command with flag', () => {
      const result = parser.parse('shuffle discard --seed=2026');

      expect(result.commandName).toBe('shuffle');
      expect(result.args.positional).toEqual(['discard']);
      expect(result.args.flags).toEqual({ seed: '2026' });
    });

    it('should parse command with multiple flags', () => {
      const result = parser.parse('create meeple m1 --color=red --name=Player1');
      
      expect(result.commandName).toBe('create');
      expect(result.args.positional).toEqual(['meeple', 'm1']);
      expect(result.args.flags).toEqual({ color: 'red', name: 'Player1' });
    });

    it('should parse command with boolean flag', () => {
      const result = parser.parse('flip p1 --faceup');
      
      expect(result.commandName).toBe('flip');
      expect(result.args.positional).toEqual(['p1']);
      expect(result.args.flags).toEqual({ faceup: true });
    });

    it('should parse command with short flag', () => {
      const result = parser.parse('shuffle d1 -s');
      
      expect(result.commandName).toBe('shuffle');
      expect(result.args.positional).toEqual(['d1']);
      expect(result.args.flags).toEqual({ s: true });
    });

    it('should parse command with short flag and value', () => {
      const result = parser.parse('shuffle d1 --seed=2026');

      expect(result.commandName).toBe('shuffle');
      expect(result.args.positional).toEqual(['d1']);
      expect(result.args.flags).toEqual({ seed: '2026' });
    });

    it('should parse command with string number value', () => {
      const result = parser.parse('rotate p1 90');
      
      expect(result.commandName).toBe('rotate');
      expect(result.args.positional).toEqual(['p1', '90']);
    });

    it('should parse command with negative number', () => {
      const result = parser.parse('rotate p1 -45');
      
      expect(result.commandName).toBe('rotate');
      expect(result.args.positional).toEqual(['p1', '-45']);
    });

    it('should parse command with float number', () => {
      const result = parser.parse('rotate p1 45.5');
      
      expect(result.commandName).toBe('rotate');
      expect(result.args.positional).toEqual(['p1', '45.5']);
    });

    it('should parse command with quoted string', () => {
      const result = parser.parse('create meeple m1 --name="Red Player"');
      
      expect(result.commandName).toBe('create');
      expect(result.args.positional).toEqual(['meeple', 'm1']);
      expect(result.args.flags).toEqual({ name: 'Red Player' });
    });

    it('should parse command with single quoted string', () => {
      const result = parser.parse("create meeple m1 --name='Blue Player'");
      
      expect(result.commandName).toBe('create');
      expect(result.args.positional).toEqual(['meeple', 'm1']);
      expect(result.args.flags).toEqual({ name: 'Blue Player' });
    });

    it('should handle extra whitespace', () => {
      const result = parser.parse('  move   card-1   discard  ');
      
      expect(result.commandName).toBe('move');
      expect(result.args.positional).toEqual(['card-1', 'discard']);
    });

    it('should throw on empty command', () => {
      expect(() => parser.parse('')).toThrow(CommandParseError);
      expect(() => parser.parse('   ')).toThrow(CommandParseError);
    });

    it('should throw on unclosed quote', () => {
      expect(() => parser.parse('create meeple m1 --name="Red')).toThrow(CommandParseError);
    });
  });

  describe('formatCommand', () => {
    it('should format simple command', () => {
      const formatted = CommandParser.formatCommand('shuffle');
      expect(formatted).toBe('shuffle');
    });

    it('should format command with positional args', () => {
      const formatted = CommandParser.formatCommand('move', {
        positional: ['card-1', 'discard'],
        flags: {},
      });
      expect(formatted).toBe('move card-1 discard');
    });

    it('should format command with flags', () => {
      const formatted = CommandParser.formatCommand('shuffle', {
        positional: ['discard'],
        flags: { seed: 2026 },
      });
      expect(formatted).toBe('shuffle discard --seed=2026');
    });

    it('should format command with boolean flag', () => {
      const formatted = CommandParser.formatCommand('flip', {
        positional: ['p1'],
        flags: { faceup: true },
      });
      expect(formatted).toBe('flip p1 --faceup');
    });
  });
});