"""Unit tests for the CLI module."""

from unittest.mock import Mock, patch

import pytest
from click.testing import CliRunner

from scaffoldforge.cli import cli
from scaffoldforge.cli.commands import parse_github_url


class TestParseGitHubUrl:
    """Tests for GitHub URL parsing."""

    def test_parse_valid_url(self):
        """Test parsing a valid GitHub issue URL."""
        owner, repo, issue_number = parse_github_url(
            "https://github.com/owner/repo/issues/123"
        )
        assert owner == "owner"
        assert repo == "repo"
        assert issue_number == 123

    def test_parse_url_with_www(self):
        """Test parsing URL with www prefix."""
        owner, repo, issue_number = parse_github_url(
            "https://www.github.com/owner/repo/issues/456"
        )
        assert owner == "owner"
        assert repo == "repo"
        assert issue_number == 456

    def test_parse_url_with_trailing_slash(self):
        """Test parsing URL with trailing slash."""
        owner, repo, issue_number = parse_github_url(
            "https://github.com/owner/repo/issues/789/"
        )
        assert owner == "owner"
        assert repo == "repo"

    def test_parse_invalid_url(self):
        """Test parsing invalid URL raises exception."""
        from click import ClickException
        with pytest.raises(ClickException):
            parse_github_url("https://invalid.com/owner/repo/issues/123")

    def test_parse_url_without_issue_number(self):
        """Test parsing URL without issue number."""
        from click import ClickException
        with pytest.raises(ClickException):
            parse_github_url("https://github.com/owner/repo")


class TestCLI:
    """Tests for CLI commands."""

    @patch('scaffoldforge.cli.commands.IssueParser')
    @patch('scaffoldforge.cli.commands.TemplateEngine')
    @patch('scaffoldforge.cli.commands.StructureGenerator')
    @patch('scaffoldforge.cli.commands.CodeGenerator')
    def test_generate_command_preview_mode(
        self, mock_code_gen, mock_struct_gen, mock_tpl_engine, mock_parser
    ):
        """Test generate command in preview mode."""
        runner = CliRunner()

        mock_issue_data = Mock()
        mock_issue_data.number = 1
        mock_issue_data.title = "Test Issue"
        mock_issue_data.labels = ["python"]
        mock_issue_data.checklist = []
        mock_issue_data.get_todo_items.return_value = []
        mock_issue_data.requirements = []
        mock_issue_data.body = ""

        mock_parser_instance = Mock()
        mock_parser_instance.parse_issue.return_value = mock_issue_data
        mock_parser_instance.detect_language.return_value = "python"
        mock_parser.return_value = mock_parser_instance

        mock_engine = Mock()
        mock_engine.load_templates.return_value = {}
        mock_engine.get_template_context.return_value = {}
        mock_tpl_engine.return_value = mock_engine

        result = runner.invoke(
            cli,
            ["generate", "https://github.com/owner/repo/issues/1", "--preview"]
        )

        assert result.exit_code == 0
        assert "PREVIEW" in result.output or "preview" in result.output.lower()

    @patch('scaffoldforge.cli.commands.TemplateEngine')
    def test_list_templates_command(self, mock_tpl_engine):
        """Test list-templates command."""
        runner = CliRunner()

        mock_engine = Mock()
        mock_engine.list_available_templates.return_value = ["default", "cli"]
        mock_tpl_engine.return_value = mock_engine

        result = runner.invoke(cli, ["list-templates", "--language", "python"])

        assert result.exit_code == 0
        assert "python" in result.output.lower()

    @patch('scaffoldforge.cli.commands.TemplateEngine')
    def test_list_templates_all_languages(self, mock_tpl_engine):
        """Test list-templates without language filter."""
        runner = CliRunner()

        mock_engine = Mock()
        mock_engine.list_available_templates.side_effect = [
            ["default"], ["default"], ["default"], ["default"]
        ]
        mock_tpl_engine.return_value = mock_engine

        result = runner.invoke(cli, ["list-templates"])

        assert result.exit_code == 0

    def test_cli_help(self):
        """Test CLI help output."""
        runner = CliRunner()
        result = runner.invoke(cli, ["--help"])

        assert result.exit_code == 0
        assert "ScaffoldForge" in result.output

    def test_generate_help(self):
        """Test generate command help."""
        runner = CliRunner()
        result = runner.invoke(cli, ["generate", "--help"])

        assert result.exit_code == 0
        assert "--output" in result.output or "-o" in result.output
        assert "--language" in result.output or "-l" in result.output
        assert "--preview" in result.output or "-p" in result.output


class TestCLIErrorHandling:
    """Tests for CLI error handling."""

    def test_generate_invalid_url(self):
        """Test generate with invalid URL."""
        runner = CliRunner()
        result = runner.invoke(
            cli,
            ["generate", "https://invalid.com/issue/123"]
        )

        assert result.exit_code != 0
        assert "Invalid" in result.output or "error" in result.output.lower()

    @patch('scaffoldforge.cli.commands.IssueParser')
    def test_generate_missing_language(
        self, mock_parser
    ):
        """Test generate without specifying language when it can't be detected."""
        runner = CliRunner()

        mock_issue_data = Mock()
        mock_issue_data.number = 1
        mock_issue_data.title = "Test Issue"
        mock_issue_data.labels = []
        mock_issue_data.checklist = []
        mock_issue_data.get_todo_items.return_value = []
        mock_issue_data.requirements = []
        mock_issue_data.body = ""

        mock_parser_instance = Mock()
        mock_parser_instance.parse_issue.return_value = mock_issue_data
        mock_parser_instance.detect_language.return_value = None
        mock_parser.return_value = mock_parser_instance

        result = runner.invoke(
            cli,
            ["generate", "https://github.com/owner/repo/issues/1"]
        )

        assert result.exit_code != 0