import { describe, it, expect } from 'vitest';
import { parseCommand, parseCommandSchema, validateCommand } from '../../src/utils/command';

describe('parseCommandSchema', () => {
    it('should parse empty schema', () => {
        const schema = parseCommandSchema('');
        expect(schema).toEqual({
            name: '',
            params: [],
            options: [],
            flags: [],
        });
    });

    it('should parse command name only', () => {
        const schema = parseCommandSchema('move');
        expect(schema).toEqual({
            name: 'move',
            params: [],
            options: [],
            flags: [],
        });
    });

    it('should parse required params', () => {
        const schema = parseCommandSchema('move <from> <to>');
        expect(schema.params).toEqual([
            { name: 'from', required: true, variadic: false },
            { name: 'to', required: true, variadic: false },
        ]);
    });

    it('should parse optional params', () => {
        const schema = parseCommandSchema('move <from> [to]');
        expect(schema.params).toEqual([
            { name: 'from', required: true, variadic: false },
            { name: 'to', required: false, variadic: false },
        ]);
    });

    it('should parse variadic params', () => {
        const schema = parseCommandSchema('move <from> [targets...]');
        expect(schema.params).toEqual([
            { name: 'from', required: true, variadic: false },
            { name: 'targets', required: false, variadic: true },
        ]);
    });

    it('should parse required variadic params', () => {
        const schema = parseCommandSchema('move <targets...>');
        expect(schema.params).toEqual([
            { name: 'targets', required: true, variadic: true },
        ]);
    });

    it('should parse long flags', () => {
        const schema = parseCommandSchema('move [--force] [--quiet]');
        expect(schema.flags).toEqual([
            { name: 'force' },
            { name: 'quiet' },
        ]);
    });

    it('should parse short flags', () => {
        const schema = parseCommandSchema('move [-f] [-q]');
        expect(schema.flags).toEqual([
            { name: 'f', short: 'f' },
            { name: 'q', short: 'q' },
        ]);
    });

    it('should parse long options', () => {
        const schema = parseCommandSchema('move --x <value> [--y value]');
        expect(schema.options).toEqual([
            { name: 'x', required: true },
            { name: 'y', required: false },
        ]);
    });

    it('should parse short options', () => {
        const schema = parseCommandSchema('move -x <value> [-y value]');
        expect(schema.options).toEqual([
            { name: 'x', short: 'x', required: true },
            { name: 'y', short: 'y', required: false },
        ]);
    });

    it('should parse mixed schema', () => {
        const schema = parseCommandSchema('move <from> <to> [--force] [-f] [--speed <val>] [-s val]');
        expect(schema).toEqual({
            name: 'move',
            params: [
                { name: 'from', required: true, variadic: false },
                { name: 'to', required: true, variadic: false },
            ],
            flags: [
                { name: 'force' },
                { name: 'f', short: 'f' },
            ],
            options: [
                { name: 'speed', required: false },
                { name: 's', short: 's', required: false },
            ],
        });
    });

    it('should handle complex schema', () => {
        const schema = parseCommandSchema('place <piece> <region> [x...] [--rotate <angle>] [--force] [-f]');
        expect(schema.name).toBe('place');
        expect(schema.params).toHaveLength(3);
        expect(schema.flags).toHaveLength(2);
        expect(schema.options).toHaveLength(1);
    });
});

describe('validateCommand', () => {
    it('should validate correct command', () => {
        const schema = parseCommandSchema('move <from> <to>');
        const command = parseCommand('move meeple1 region1');
        const result = validateCommand(command, schema);
        expect(result).toEqual({ valid: true });
    });

    it('should reject wrong command name', () => {
        const schema = parseCommandSchema('move <from>');
        const command = parseCommand('place meeple1');
        const result = validateCommand(command, schema);
        expect(result).toEqual({
            valid: false,
            errors: expect.arrayContaining([
                expect.stringContaining('命令名称不匹配'),
            ]),
        });
    });

    it('should reject missing required params', () => {
        const schema = parseCommandSchema('move <from> <to>');
        const command = parseCommand('move meeple1');
        const result = validateCommand(command, schema);
        expect(result).toEqual({
            valid: false,
            errors: expect.arrayContaining([
                expect.stringContaining('参数不足'),
            ]),
        });
    });

    it('should accept optional params missing', () => {
        const schema = parseCommandSchema('move <from> [to]');
        const command = parseCommand('move meeple1');
        const result = validateCommand(command, schema);
        expect(result).toEqual({ valid: true });
    });

    it('should reject extra params without variadic', () => {
        const schema = parseCommandSchema('move <from> <to>');
        const command = parseCommand('move meeple1 region1 extra');
        const result = validateCommand(command, schema);
        expect(result).toEqual({
            valid: false,
            errors: expect.arrayContaining([
                expect.stringContaining('参数过多'),
            ]),
        });
    });

    it('should accept extra params with variadic', () => {
        const schema = parseCommandSchema('move <from> [targets...]');
        const command = parseCommand('move meeple1 region1 region2 region3');
        const result = validateCommand(command, schema);
        expect(result).toEqual({ valid: true });
    });

    it('should reject missing required option', () => {
        const schema = parseCommandSchema('move <from> --speed <val>');
        const command = parseCommand('move meeple1');
        const result = validateCommand(command, schema);
        expect(result).toEqual({
            valid: false,
            errors: expect.arrayContaining([
                expect.stringContaining('缺少必需选项'),
            ]),
        });
    });

    it('should accept present required option', () => {
        const schema = parseCommandSchema('move <from> --speed <val>');
        const command = parseCommand('move meeple1 --speed 10');
        const result = validateCommand(command, schema);
        expect(result).toEqual({ valid: true });
    });

    it('should accept optional option missing', () => {
        const schema = parseCommandSchema('move <from> [--speed [val]]');
        const command = parseCommand('move meeple1');
        const result = validateCommand(command, schema);
        expect(result).toEqual({ valid: true });
    });

    it('should accept flags present or not', () => {
        const schema = parseCommandSchema('move <from> [--force]');
        const cmd1 = parseCommand('move meeple1');
        const cmd2 = parseCommand('move meeple1 --force');
        expect(validateCommand(cmd1, schema)).toEqual({ valid: true });
        expect(validateCommand(cmd2, schema)).toEqual({ valid: true });
    });

    it('should validate short form option', () => {
        const schema = parseCommandSchema('move <from> -s <val>');
        const command = parseCommand('move meeple1 -s 10');
        const result = validateCommand(command, schema);
        expect(result).toEqual({ valid: true });
    });

    it('should provide detailed error messages', () => {
        const schema = parseCommandSchema('place <piece> <region> --rotate <angle>');
        const command = parseCommand('place meeple1');
        const result = validateCommand(command, schema);
        expect(result.valid).toBe(false);
        if (!result.valid) {
            expect(result.errors.length).toBeGreaterThanOrEqual(1);
        }
    });
});

describe('integration', () => {
    it('should work together parse and validate', () => {
        const schemaStr = 'place <piece> <region> [--x <val>] [--y [val]] [--force] [-f]';
        const schema = parseCommandSchema(schemaStr);

        const validCmd = parseCommand('place meeple1 board --x 5 --force');
        expect(validateCommand(validCmd, schema)).toEqual({ valid: true });

        const invalidCmd = parseCommand('place meeple1');
        const result = validateCommand(invalidCmd, schema);
        expect(result.valid).toBe(false);
    });
});