"""Unit tests for EnvInspectExecutor."""

from pathlib import Path
from unittest.mock import MagicMock, patch

import pytest

# Patch the logger before importing the executor
with patch("app.utils.logger.get_logger", return_value=MagicMock()):
    from app.executors.env_inspect_executor import EnvInspectExecutor


class TestEnvInspectExecutor:
    """Test suite for EnvInspectExecutor."""

    @pytest.fixture
    def executor(self):
        """Create executor instance with mocked logger."""
        with patch("app.executors.base.get_logger", return_value=MagicMock()):
            return EnvInspectExecutor()

    @pytest.fixture
    def temp_env_root(self, tmp_path):
        """Create a temporary directory to act as /opt/letsbe/env."""
        env_dir = tmp_path / "opt" / "letsbe" / "env"
        env_dir.mkdir(parents=True)
        return env_dir

    @pytest.fixture
    def mock_settings(self, temp_env_root):
        """Mock settings with temporary env root."""
        settings = MagicMock()
        settings.allowed_env_root = str(temp_env_root)
        return settings

    # ==================== Basic Inspection Tests ====================

    @pytest.mark.asyncio
    async def test_inspect_all_keys(self, executor, temp_env_root, mock_settings):
        """Test reading all keys when no filter is provided."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            env_path = temp_env_root / "app.env"
            env_path.write_text("KEY1=value1\nKEY2=value2\nKEY3=value3\n")

            result = await executor.execute({
                "path": str(env_path),
            })

            assert result.success is True
            assert result.data["path"] == str(env_path)
            assert result.data["keys"] == {
                "KEY1": "value1",
                "KEY2": "value2",
                "KEY3": "value3",
            }

    @pytest.mark.asyncio
    async def test_inspect_selected_keys(self, executor, temp_env_root, mock_settings):
        """Test reading only selected keys."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            env_path = temp_env_root / "app.env"
            env_path.write_text("KEY1=value1\nKEY2=value2\nKEY3=value3\n")

            result = await executor.execute({
                "path": str(env_path),
                "keys": ["KEY1", "KEY3"],
            })

            assert result.success is True
            assert result.data["keys"] == {
                "KEY1": "value1",
                "KEY3": "value3",
            }

    @pytest.mark.asyncio
    async def test_inspect_selected_keys_ignores_unknown(self, executor, temp_env_root, mock_settings):
        """Test that unknown keys in filter are silently ignored."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            env_path = temp_env_root / "app.env"
            env_path.write_text("KEY1=value1\nKEY2=value2\n")

            result = await executor.execute({
                "path": str(env_path),
                "keys": ["KEY1", "NONEXISTENT", "ALSO_MISSING"],
            })

            assert result.success is True
            assert result.data["keys"] == {"KEY1": "value1"}

    @pytest.mark.asyncio
    async def test_inspect_empty_keys_filter(self, executor, temp_env_root, mock_settings):
        """Test with empty keys filter returns nothing."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            env_path = temp_env_root / "app.env"
            env_path.write_text("KEY1=value1\n")

            result = await executor.execute({
                "path": str(env_path),
                "keys": [],
            })

            assert result.success is True
            assert result.data["keys"] == {}

    @pytest.mark.asyncio
    async def test_inspect_with_keys_null(self, executor, temp_env_root, mock_settings):
        """Test that keys=null returns all keys (same as omitting keys)."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            env_path = temp_env_root / "app.env"
            env_path.write_text("KEY1=value1\nKEY2=value2\n")

            result = await executor.execute({
                "path": str(env_path),
                "keys": None,
            })

            assert result.success is True
            assert result.data["keys"] == {"KEY1": "value1", "KEY2": "value2"}

    # ==================== File Not Found Tests ====================

    @pytest.mark.asyncio
    async def test_missing_file(self, executor, temp_env_root, mock_settings):
        """Test error when file does not exist."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            env_path = temp_env_root / "nonexistent.env"

            result = await executor.execute({
                "path": str(env_path),
            })

            assert result.success is False
            assert "does not exist" in result.error or "Path validation failed" in result.error

    # ==================== Path Validation Tests ====================

    @pytest.mark.asyncio
    async def test_path_traversal_rejected(self, executor, temp_env_root, mock_settings):
        """Test rejection of directory traversal attempts."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            result = await executor.execute({
                "path": str(temp_env_root / ".." / ".." / "etc" / "passwd"),
            })

            assert result.success is False
            assert "Path validation failed" in result.error or "traversal" in result.error.lower()

    @pytest.mark.asyncio
    async def test_path_outside_allowed_root(self, executor, temp_env_root, mock_settings):
        """Test rejection of paths outside allowed root."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            result = await executor.execute({
                "path": "/etc/passwd",
            })

            assert result.success is False
            assert "Path validation failed" in result.error

    @pytest.mark.asyncio
    async def test_path_in_allowed_root_nested(self, executor, temp_env_root, mock_settings):
        """Test acceptance of valid nested path within allowed root."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            nested_dir = temp_env_root / "subdir"
            nested_dir.mkdir()
            env_path = nested_dir / "app.env"
            env_path.write_text("KEY=value\n")

            result = await executor.execute({
                "path": str(env_path),
            })

            assert result.success is True
            assert result.data["keys"] == {"KEY": "value"}

    # ==================== Payload Validation Tests ====================

    @pytest.mark.asyncio
    async def test_missing_path_payload(self, executor):
        """Test rejection of payload without path."""
        with pytest.raises(ValueError, match="Missing required field: path"):
            await executor.execute({})

    @pytest.mark.asyncio
    async def test_missing_path_payload_with_keys(self, executor):
        """Test rejection of payload with keys but no path."""
        with pytest.raises(ValueError, match="Missing required field: path"):
            await executor.execute({
                "keys": ["KEY1"],
            })

    @pytest.mark.asyncio
    async def test_reject_invalid_keys_type(self, executor, temp_env_root, mock_settings):
        """Test rejection when keys is not a list or null."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            env_path = temp_env_root / "app.env"
            env_path.write_text("KEY=value\n")

            result = await executor.execute({
                "path": str(env_path),
                "keys": {"not": "a_list"},
            })

            assert result.success is False
            assert "'keys' must be a list" in result.error

    @pytest.mark.asyncio
    async def test_reject_keys_as_string(self, executor, temp_env_root, mock_settings):
        """Test rejection when keys is a string instead of list."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            env_path = temp_env_root / "app.env"
            env_path.write_text("KEY=value\n")

            result = await executor.execute({
                "path": str(env_path),
                "keys": "KEY",
            })

            assert result.success is False
            assert "'keys' must be a list" in result.error

    # ==================== Task Type Tests ====================

    def test_task_type_property(self, executor):
        """Test that task_type returns ENV_INSPECT."""
        assert executor.task_type == "ENV_INSPECT"

    # ==================== Registry Integration Tests ====================

    def test_registry_integration(self):
        """Test that ENV_INSPECT is registered in executor registry."""
        from app.executors import get_executor

        executor = get_executor("ENV_INSPECT")
        assert executor is not None
        assert executor.task_type == "ENV_INSPECT"

    # ==================== Empty File Tests ====================

    @pytest.mark.asyncio
    async def test_empty_file(self, executor, temp_env_root, mock_settings):
        """Test reading an empty ENV file returns empty keys dict."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            env_path = temp_env_root / "empty.env"
            env_path.write_text("")

            result = await executor.execute({
                "path": str(env_path),
            })

            assert result.success is True
            assert result.data["keys"] == {}

    @pytest.mark.asyncio
    async def test_file_with_only_comments(self, executor, temp_env_root, mock_settings):
        """Test reading file with only comments returns empty keys dict."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            env_path = temp_env_root / "comments.env"
            env_path.write_text("# This is a comment\n# Another comment\n")

            result = await executor.execute({
                "path": str(env_path),
            })

            assert result.success is True
            assert result.data["keys"] == {}

    # ==================== Parsing Tests ====================

    @pytest.mark.asyncio
    async def test_parses_quoted_values_double(self, executor, temp_env_root, mock_settings):
        """Test parsing of double-quoted values."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            env_path = temp_env_root / "app.env"
            env_path.write_text('KEY="value with spaces"\n')

            result = await executor.execute({
                "path": str(env_path),
            })

            assert result.success is True
            assert result.data["keys"]["KEY"] == "value with spaces"

    @pytest.mark.asyncio
    async def test_parses_quoted_values_single(self, executor, temp_env_root, mock_settings):
        """Test parsing of single-quoted values."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            env_path = temp_env_root / "app.env"
            env_path.write_text("KEY='single quoted'\n")

            result = await executor.execute({
                "path": str(env_path),
            })

            assert result.success is True
            assert result.data["keys"]["KEY"] == "single quoted"

    @pytest.mark.asyncio
    async def test_parses_value_with_equals(self, executor, temp_env_root, mock_settings):
        """Test parsing values containing equals signs."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            env_path = temp_env_root / "app.env"
            env_path.write_text("URL=postgres://user:pass@host/db?opt=val\n")

            result = await executor.execute({
                "path": str(env_path),
            })

            assert result.success is True
            assert result.data["keys"]["URL"] == "postgres://user:pass@host/db?opt=val"

    @pytest.mark.asyncio
    async def test_ignores_comment_lines(self, executor, temp_env_root, mock_settings):
        """Test that comment lines are ignored."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            env_path = temp_env_root / "app.env"
            env_path.write_text("# Comment\nKEY=value\n# Another comment\nKEY2=value2\n")

            result = await executor.execute({
                "path": str(env_path),
            })

            assert result.success is True
            assert result.data["keys"] == {"KEY": "value", "KEY2": "value2"}

    @pytest.mark.asyncio
    async def test_ignores_empty_lines(self, executor, temp_env_root, mock_settings):
        """Test that empty lines are ignored."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            env_path = temp_env_root / "app.env"
            env_path.write_text("KEY1=value1\n\n\nKEY2=value2\n")

            result = await executor.execute({
                "path": str(env_path),
            })

            assert result.success is True
            assert result.data["keys"] == {"KEY1": "value1", "KEY2": "value2"}

    @pytest.mark.asyncio
    async def test_handles_whitespace_around_key_value(self, executor, temp_env_root, mock_settings):
        """Test handling of whitespace around keys and values."""
        with patch("app.executors.env_inspect_executor.get_settings", return_value=mock_settings):
            env_path = temp_env_root / "app.env"
            env_path.write_text("  KEY1  =  value1  \n")

            result = await executor.execute({
                "path": str(env_path),
            })

            assert result.success is True
            assert result.data["keys"]["KEY1"] == "value1"


class TestEnvInspectExecutorInternal:
    """Tests for internal methods of EnvInspectExecutor."""

    @pytest.fixture
    def executor(self):
        """Create executor instance with mocked logger."""
        with patch("app.executors.base.get_logger", return_value=MagicMock()):
            return EnvInspectExecutor()

    def test_parse_env_file_basic(self, executor):
        """Test basic ENV file parsing."""
        content = "KEY1=value1\nKEY2=value2\n"
        result = executor._parse_env_file(content)
        assert result == {"KEY1": "value1", "KEY2": "value2"}

    def test_parse_env_file_with_comments(self, executor):
        """Test parsing ignores comments."""
        content = "# Comment\nKEY=value\n# Another comment\n"
        result = executor._parse_env_file(content)
        assert result == {"KEY": "value"}

    def test_parse_env_file_with_empty_lines(self, executor):
        """Test parsing ignores empty lines."""
        content = "KEY1=value1\n\n\nKEY2=value2\n"
        result = executor._parse_env_file(content)
        assert result == {"KEY1": "value1", "KEY2": "value2"}

    def test_parse_env_file_with_quotes(self, executor):
        """Test parsing handles quoted values."""
        content = 'KEY1="quoted value"\nKEY2=\'single quoted\'\n'
        result = executor._parse_env_file(content)
        assert result == {"KEY1": "quoted value", "KEY2": "single quoted"}

    def test_parse_env_file_with_equals_in_value(self, executor):
        """Test parsing handles equals signs in values."""
        content = "URL=postgres://user:pass@host/db?opt=val\n"
        result = executor._parse_env_file(content)
        assert result == {"URL": "postgres://user:pass@host/db?opt=val"}

    def test_parse_env_file_empty(self, executor):
        """Test parsing empty content."""
        content = ""
        result = executor._parse_env_file(content)
        assert result == {}

    def test_parse_env_file_only_comments(self, executor):
        """Test parsing content with only comments."""
        content = "# Comment 1\n# Comment 2\n"
        result = executor._parse_env_file(content)
        assert result == {}