"""Tests for template module."""

import pytest
from pathlib import Path


class TestTemplateManager:
    """Test cases for template management."""

    def test_list_builtin_templates(self):
        """Test listing built-in templates."""
        from env_pro.core.template import TemplateManager

        manager = TemplateManager()
        templates = manager.list_templates()

        template_names = [t["name"] for t in templates]
        assert "fastapi" in template_names
        assert "django" in template_names
        assert "nodejs" in template_names

    def test_get_builtin_template(self):
        """Test getting a built-in template."""
        from env_pro.core.template import TemplateManager

        manager = TemplateManager()
        template = manager.get_template("fastapi")

        assert template is not None
        assert "variables" in template
        assert "APP_NAME" in template["variables"]

    def test_apply_template(self):
        """Test applying a template."""
        from env_pro.core.template import TemplateManager

        manager = TemplateManager()
        content = manager.apply_template("minimal", {"ENVIRONMENT": "production", "DEBUG": "false"})

        assert "ENVIRONMENT=production" in content
        assert "DEBUG=false" in content
        assert "# Generated by env-pro" in content

    def test_apply_template_with_output(self, temp_dir):
        """Test applying template to a file."""
        from env_pro.core.template import TemplateManager

        manager = TemplateManager()
        output_file = temp_dir / ".env"
        manager.apply_template("minimal", {"ENVIRONMENT": "test"}, output_file=output_file)

        assert output_file.exists()
        content = output_file.read_text()
        assert "ENVIRONMENT=test" in content

    def test_get_nonexistent_template(self):
        """Test getting a template that doesn't exist."""
        from env_pro.core.template import TemplateManager

        manager = TemplateManager()
        template = manager.get_template("nonexistent")

        assert template is None