"""Tests for the CLI module."""

import json
import pytest
from click.testing import CliRunner

from regex_humanizer.cli import main


class TestCLIMain:
    def test_main_help(self):
        runner = CliRunner()
        result = runner.invoke(main, ["--help"])
        assert result.exit_code == 0
        assert "Regex Humanizer" in result.output

    def test_main_version(self):
        runner = CliRunner()
        result = runner.invoke(main, ["--version"])
        assert result.exit_code == 0
        assert "0.1.0" in result.output


class TestExplainCommand:
    def test_explain_literal(self):
        runner = CliRunner()
        result = runner.invoke(main, ["explain", "hello"])
        assert result.exit_code == 0
        assert "hello" in result.output.lower() or "letter" in result.output.lower()

    def test_explain_with_flavor(self):
        runner = CliRunner()
        result = runner.invoke(main, ["explain", "hello", "--flavor", "python"])
        assert result.exit_code == 0
        assert "hello" in result.output.lower()

    def test_explain_verbose(self):
        runner = CliRunner()
        result = runner.invoke(main, ["explain", "hello", "--verbose"])
        assert result.exit_code == 0
        assert "Pattern" in result.output

    def test_explain_json(self):
        runner = CliRunner()
        result = runner.invoke(main, ["explain", "hello", "--json"])
        assert result.exit_code == 0
        assert "{" in result.output


class TestGenerateCommand:
    def test_generate_literal(self):
        runner = CliRunner()
        result = runner.invoke(main, ["generate", "hello"])
        assert result.exit_code == 0
        assert "hello" in result.output

    def test_generate_with_count(self):
        runner = CliRunner()
        result = runner.invoke(main, ["generate", "a", "--count", "3"])
        assert result.exit_code == 0

    def test_generate_json(self):
        runner = CliRunner()
        result = runner.invoke(main, ["generate", "hello", "--json"])
        assert result.exit_code == 0
        assert "{" in result.output


class TestFromEnglishCommand:
    def test_from_english_basic(self):
        runner = CliRunner()
        result = runner.invoke(main, ["from-english", "the letter a"])
        assert result.exit_code == 0

    def test_from_english_with_flavor(self):
        runner = CliRunner()
        result = runner.invoke(main, ["from-english", "a digit", "--flavor", "python"])
        assert result.exit_code == 0


class TestFlavorsCommand:
    def test_flavors_list(self):
        runner = CliRunner()
        result = runner.invoke(main, ["flavors"])
        assert result.exit_code == 0
        assert "pcre" in result.output
        assert "javascript" in result.output


class TestDetectCommand:
    def test_detect_pattern(self):
        runner = CliRunner()
        result = runner.invoke(main, ["detect", r"\d+"])
        assert result.exit_code == 0
        assert "flavor" in result.output.lower()