"""Advanced tests for settings bootstrap - template preservation and edge cases."""

import pytest

from alfred.settings_bootstrap import ConfigSource, SettingsBootstrap


@pytest.fixture
def test_toml_with_all_types(tmp_path):
    """Create test TOML with all setting types."""
    toml_content = """
[tool.poetry]
name = "test"
version = "1.0.0"

[tool.poetry.dependencies]
python = "^3.14"

[tool.alfred.settings_schema.STRING_VAR]
type = "string"
source = "env"
default = "default_string"
description = "String variable"
category = "test"

[tool.alfred.settings_schema.INT_VAR]
type = "integer"
source = "env"
default = 42
description = "Integer variable"
category = "test"

[tool.alfred.settings_schema.FLOAT_VAR]
type = "float"
source = "env"
default = 3.14
description = "Float variable"
category = "test"

[tool.alfred.settings_schema.BOOL_VAR]
type = "boolean"
source = "env"
default = true
description = "Boolean variable"
category = "test"

[tool.alfred.settings_schema.SECRET_VAR]
type = "secret"
source = "generated"
secret_rule = "16:hex"
description = "Secret variable"
category = "security"

[tool.alfred.settings_schema.COMPUTED_VAR]
type = "computed"
source = "computed"
compute_from = ["STRING_VAR", "INT_VAR"]
compute_template = "{STRING_VAR}_{INT_VAR}"
description = "Computed variable"
category = "test"
"""
    toml_path = tmp_path / "pyproject.toml"
    toml_path.write_text(toml_content)
    return tmp_path


@pytest.fixture
def test_env_example(tmp_path):
    """Create .env.example template."""
    env_example_content = """# Test configuration
STRING_VAR=
INT_VAR=
FLOAT_VAR=

# Boolean settings
BOOL_VAR=

# Security
SECRET_VAR=

# Computed values
COMPUTED_VAR=

# Custom section
CUSTOM_VAR=custom_value
"""
    env_example_path = tmp_path / ".env.example"
    env_example_path.write_text(env_example_content)
    return env_example_path


class TestTemplatePreservation:
    """Test that .env.example template structure is preserved."""

    def test_preserves_comments(self, test_toml_with_all_types, test_env_example):
        """Test that comments from .env.example are preserved."""
        from alfred.settings_schema import load_schema

        schema = load_schema(test_toml_with_all_types)
        source = ConfigSource.from_base_dir(test_toml_with_all_types)

        bootstrapper = SettingsBootstrap(source, schema)
        bootstrapper.bootstrap()

        env_content = source.env_path.read_text()

        # Check comments are preserved
        assert "# Test configuration" in env_content
        assert "# Boolean settings" in env_content
        assert "# Security" in env_content
        assert "# Computed values" in env_content

    def test_preserves_empty_lines(self, test_toml_with_all_types, test_env_example):
        """Test that empty lines from .env.example are preserved."""
        from alfred.settings_schema import load_schema

        schema = load_schema(test_toml_with_all_types)
        source = ConfigSource.from_base_dir(test_toml_with_all_types)

        bootstrapper = SettingsBootstrap(source, schema)
        bootstrapper.bootstrap()

        env_content = source.env_path.read_text()
        lines = env_content.split("\n")

        # Check there are empty lines (structure preserved)
        assert "" in lines

    def test_preserves_variable_order(self, test_toml_with_all_types, test_env_example):
        """Test that variable order from .env.example is preserved."""
        from alfred.settings_schema import load_schema

        schema = load_schema(test_toml_with_all_types)
        source = ConfigSource.from_base_dir(test_toml_with_all_types)

        bootstrapper = SettingsBootstrap(source, schema)
        bootstrapper.bootstrap()

        env_content = source.env_path.read_text()

        # Check order is preserved
        string_pos = env_content.find("STRING_VAR=")
        int_pos = env_content.find("INT_VAR=")
        float_pos = env_content.find("FLOAT_VAR=")
        bool_pos = env_content.find("BOOL_VAR=")

        assert string_pos < int_pos < float_pos < bool_pos


class TestSecretPreservation:
    """Test that secrets are never overwritten."""

    def test_preserves_existing_secrets(
        self, test_toml_with_all_types, test_env_example
    ):
        """Test that existing secrets are preserved across multiple bootstraps."""
        from alfred.settings_schema import load_schema

        schema = load_schema(test_toml_with_all_types)
        source = ConfigSource.from_base_dir(test_toml_with_all_types)

        # First bootstrap - generates secret
        bootstrapper1 = SettingsBootstrap(source, schema)
        bootstrapper1.bootstrap()

        env_content_1 = source.env_path.read_text()
        secret_1 = [
            line.split("=")[1]
            for line in env_content_1.split("\n")
            if line.startswith("SECRET_VAR=")
        ][0]

        # Second bootstrap - should preserve secret
        bootstrapper2 = SettingsBootstrap(source, schema)
        bootstrapper2.bootstrap()

        env_content_2 = source.env_path.read_text()
        secret_2 = [
            line.split("=")[1]
            for line in env_content_2.split("\n")
            if line.startswith("SECRET_VAR=")
        ][0]

        assert secret_1 == secret_2
        assert len(secret_1) == 32  # 16 hex bytes

    def test_multiple_secrets_preserved(self, tmp_path):
        """Test that multiple secrets are all preserved."""
        toml_content = """
[tool.poetry]
name = "test"
version = "1.0.0"

[tool.alfred.settings_schema.SECRET_1]
type = "secret"
source = "generated"
secret_rule = "16:hex"
category = "security"

[tool.alfred.settings_schema.SECRET_2]
type = "secret"
source = "generated"
secret_rule = "32:b64"
category = "security"

[tool.alfred.settings_schema.SECRET_3]
type = "secret"
source = "generated"
secret_rule = "8:hex"
category = "security"
"""
        (tmp_path / "pyproject.toml").write_text(toml_content)
        (tmp_path / ".env.example").write_text("SECRET_1=\nSECRET_2=\nSECRET_3=\n")

        from alfred.settings_schema import load_schema

        schema = load_schema(tmp_path)
        source = ConfigSource.from_base_dir(tmp_path)

        # First bootstrap
        bootstrapper1 = SettingsBootstrap(source, schema)
        bootstrapper1.bootstrap()

        env_content_1 = source.env_path.read_text()

        # Second bootstrap
        bootstrapper2 = SettingsBootstrap(source, schema)
        bootstrapper2.bootstrap()

        env_content_2 = source.env_path.read_text()

        # All secrets should be identical
        assert env_content_1 == env_content_2


class TestCustomVariables:
    """Test that custom variables (not in schema) are preserved."""

    def test_preserves_custom_variables_from_env(
        self, test_toml_with_all_types, test_env_example
    ):
        """Test that custom variables added to .env are preserved."""
        from alfred.settings_schema import load_schema

        schema = load_schema(test_toml_with_all_types)
        source = ConfigSource.from_base_dir(test_toml_with_all_types)

        # First bootstrap
        bootstrapper1 = SettingsBootstrap(source, schema)
        bootstrapper1.bootstrap()

        # Add custom variables to .env
        with open(source.env_path, "a") as f:
            f.write("\nMY_CUSTOM_VAR=custom_value\n")
            f.write("ANOTHER_CUSTOM=another_value\n")

        # Second bootstrap
        bootstrapper2 = SettingsBootstrap(source, schema)
        bootstrapper2.bootstrap()

        env_content = source.env_path.read_text()

        # Custom variables should be preserved
        assert "MY_CUSTOM_VAR=custom_value" in env_content
        assert "ANOTHER_CUSTOM=another_value" in env_content

    def test_custom_variables_in_dedicated_section(
        self, test_toml_with_all_types, test_env_example
    ):
        """Test that custom variables are placed in a dedicated section."""
        from alfred.settings_schema import load_schema

        schema = load_schema(test_toml_with_all_types)
        source = ConfigSource.from_base_dir(test_toml_with_all_types)

        # Create .env with custom variable
        source.env_path.write_text("MY_CUSTOM_VAR=test\n")

        bootstrapper = SettingsBootstrap(source, schema)
        bootstrapper.bootstrap()

        env_content = source.env_path.read_text()

        # Check custom section exists
        assert "# --- CUSTOM VARIABLES ---" in env_content
        assert "MY_CUSTOM_VAR=test" in env_content

    def test_preserves_custom_from_env_example(
        self, test_toml_with_all_types, test_env_example
    ):
        """Test that custom variables in .env.example are preserved."""
        from alfred.settings_schema import load_schema

        schema = load_schema(test_toml_with_all_types)
        source = ConfigSource.from_base_dir(test_toml_with_all_types)

        bootstrapper = SettingsBootstrap(source, schema)
        bootstrapper.bootstrap()

        env_content = source.env_path.read_text()

        # CUSTOM_VAR is in .env.example but not in schema
        assert "CUSTOM_VAR=custom_value" in env_content


class TestBooleanHandling:
    """Test that booleans are handled correctly."""

    def test_booleans_written_as_lowercase(
        self, test_toml_with_all_types, test_env_example
    ):
        """Test that Python booleans are written as lowercase strings."""
        from alfred.settings_schema import load_schema

        schema = load_schema(test_toml_with_all_types)
        source = ConfigSource.from_base_dir(test_toml_with_all_types)

        bootstrapper = SettingsBootstrap(source, schema)
        bootstrapper.bootstrap()

        env_content = source.env_path.read_text()

        # Boolean should be lowercase
        assert "BOOL_VAR=true" in env_content
        assert "BOOL_VAR=True" not in env_content
        assert "BOOL_VAR=TRUE" not in env_content

    def test_false_boolean_written_as_lowercase(self, tmp_path):
        """Test that False is written as 'false'."""
        toml_content = """
[tool.poetry]
name = "test"
version = "1.0.0"

[tool.alfred.settings_schema.BOOL_FALSE]
type = "boolean"
source = "env"
default = false
category = "test"
"""
        (tmp_path / "pyproject.toml").write_text(toml_content)
        (tmp_path / ".env.example").write_text("BOOL_FALSE=\n")

        from alfred.settings_schema import load_schema

        schema = load_schema(tmp_path)
        source = ConfigSource.from_base_dir(tmp_path)

        bootstrapper = SettingsBootstrap(source, schema)
        bootstrapper.bootstrap()

        env_content = source.env_path.read_text()

        assert "BOOL_FALSE=false" in env_content
        assert "BOOL_FALSE=False" not in env_content

    def test_boolean_parsing_from_env(self, tmp_path):
        """Test that various boolean formats are parsed correctly."""
        toml_content = """
[tool.poetry]
name = "test"
version = "1.0.0"

[tool.alfred.settings_schema.BOOL_VAR]
type = "boolean"
source = "env"
default = false
category = "test"
"""
        (tmp_path / "pyproject.toml").write_text(toml_content)
        (tmp_path / ".env.example").write_text("BOOL_VAR=\n")

        from alfred.settings_schema import load_schema

        schema = load_schema(tmp_path)
        source = ConfigSource.from_base_dir(tmp_path)

        # Test different boolean formats
        test_cases = [
            ("true", True),
            ("TRUE", True),
            ("True", True),
            ("1", True),
            ("yes", True),
            ("false", False),
            ("FALSE", False),
            ("False", False),
            ("0", False),
            ("no", False),
        ]

        for input_val, expected in test_cases:
            source.env_path.write_text(f"BOOL_VAR={input_val}\n")

            bootstrapper = SettingsBootstrap(source, schema)
            bootstrapper._load_sources()
            bootstrapper._resolve_settings()

            assert bootstrapper.resolved_settings["BOOL_VAR"] == expected


class TestComputedVariables:
    """Test that computed variables are calculated correctly."""

    def test_computed_variables_written_to_env(
        self, test_toml_with_all_types, test_env_example
    ):
        """Test that computed variables are written with their computed values."""
        from alfred.settings_schema import load_schema

        schema = load_schema(test_toml_with_all_types)
        source = ConfigSource.from_base_dir(test_toml_with_all_types)

        bootstrapper = SettingsBootstrap(source, schema)
        bootstrapper.bootstrap()

        env_content = source.env_path.read_text()

        # Computed variable should have its computed value
        assert "COMPUTED_VAR=default_string_42" in env_content

    def test_computed_uri_example(self, tmp_path):
        """Test computed URI (like MONGO_URI) is written correctly."""
        toml_content = """
[tool.poetry]
name = "test"
version = "1.0.0"

[tool.alfred.settings_schema.DB_HOST]
type = "string"
source = "env"
default = "localhost"
category = "database"

[tool.alfred.settings_schema.DB_PORT]
type = "integer"
source = "env"
default = 5432
category = "database"

[tool.alfred.settings_schema.DB_USER]
type = "string"
source = "env"
default = "user"
category = "database"

[tool.alfred.settings_schema.DB_PASSWORD]
type = "secret"
source = "generated"
secret_rule = "16:hex"
category = "security"

[tool.alfred.settings_schema.DB_URI]
type = "computed"
source = "computed"
compute_from = ["DB_USER", "DB_PASSWORD", "DB_HOST", "DB_PORT"]
compute_template = "postgresql://{DB_USER}:{DB_PASSWORD}@{DB_HOST}:{DB_PORT}/db"
category = "database"
"""
        (tmp_path / "pyproject.toml").write_text(toml_content)
        (tmp_path / ".env.example").write_text(
            "DB_HOST=\nDB_PORT=\nDB_USER=\nDB_PASSWORD=\nDB_URI=\n"
        )

        from alfred.settings_schema import load_schema

        schema = load_schema(tmp_path)
        source = ConfigSource.from_base_dir(tmp_path)

        bootstrapper = SettingsBootstrap(source, schema)
        bootstrapper.bootstrap()

        env_content = source.env_path.read_text()

        # Check URI is computed and written
        assert "DB_URI=postgresql://user:" in env_content
        assert "@localhost:5432/db" in env_content

        # Extract password from URI to verify it's the same as DB_PASSWORD
        import re

        uri_match = re.search(r"DB_URI=postgresql://user:([^@]+)@", env_content)
        password_match = re.search(r"DB_PASSWORD=([^\n]+)", env_content)

        assert uri_match and password_match
        assert uri_match.group(1) == password_match.group(1)


class TestEdgeCases:
    """Test edge cases and error conditions."""

    def test_missing_env_example(self, tmp_path):
        """Test that missing .env.example raises error."""
        toml_content = """
[tool.poetry]
name = "test"
version = "1.0.0"

[tool.alfred.settings_schema.TEST_VAR]
type = "string"
source = "env"
default = "test"
category = "test"
"""
        (tmp_path / "pyproject.toml").write_text(toml_content)

        from alfred.settings_schema import load_schema

        schema = load_schema(tmp_path)
        source = ConfigSource.from_base_dir(tmp_path)

        bootstrapper = SettingsBootstrap(source, schema)

        with pytest.raises(FileNotFoundError, match=".env.example not found"):
            bootstrapper.bootstrap()

    def test_empty_env_example(self, tmp_path):
        """Test that empty .env.example works."""
        toml_content = """
[tool.poetry]
name = "test"
version = "1.0.0"

[tool.alfred.settings_schema.TEST_VAR]
type = "string"
source = "env"
default = "test"
category = "test"
"""
        (tmp_path / "pyproject.toml").write_text(toml_content)
        (tmp_path / ".env.example").write_text("")

        from alfred.settings_schema import load_schema

        schema = load_schema(tmp_path)
        source = ConfigSource.from_base_dir(tmp_path)

        bootstrapper = SettingsBootstrap(source, schema)
        bootstrapper.bootstrap()

        # Should create .env even if .env.example is empty
        assert source.env_path.exists()

    def test_variable_with_equals_in_value(self, tmp_path):
        """Test that variables with '=' in their value are handled correctly."""
        toml_content = """
[tool.poetry]
name = "test"
version = "1.0.0"

[tool.alfred.settings_schema.URL_VAR]
type = "string"
source = "env"
default = "http://example.com?key=value"
category = "test"
"""
        (tmp_path / "pyproject.toml").write_text(toml_content)
        (tmp_path / ".env.example").write_text("URL_VAR=\n")

        from alfred.settings_schema import load_schema

        schema = load_schema(tmp_path)
        source = ConfigSource.from_base_dir(tmp_path)

        bootstrapper = SettingsBootstrap(source, schema)
        bootstrapper.bootstrap()

        env_content = source.env_path.read_text()

        assert "URL_VAR=http://example.com?key=value" in env_content

    def test_preserves_existing_values_on_update(self, tmp_path):
        """Test that existing values are preserved when updating."""
        toml_content = """
[tool.poetry]
name = "test"
version = "1.0.0"

[tool.alfred.settings_schema.VAR1]
type = "string"
source = "env"
default = "default1"
category = "test"

[tool.alfred.settings_schema.VAR2]
type = "string"
source = "env"
default = "default2"
category = "test"
"""
        (tmp_path / "pyproject.toml").write_text(toml_content)
        (tmp_path / ".env.example").write_text("VAR1=\nVAR2=\n")

        from alfred.settings_schema import load_schema

        schema = load_schema(tmp_path)
        source = ConfigSource.from_base_dir(tmp_path)

        # First bootstrap
        bootstrapper1 = SettingsBootstrap(source, schema)
        bootstrapper1.bootstrap()

        # Modify values
        source.env_path.write_text("VAR1=custom1\nVAR2=custom2\n")

        # Second bootstrap
        bootstrapper2 = SettingsBootstrap(source, schema)
        bootstrapper2.bootstrap()

        env_content = source.env_path.read_text()

        # Custom values should be preserved
        assert "VAR1=custom1" in env_content
        assert "VAR2=custom2" in env_content


class TestIntegration:
    """Integration tests with realistic scenarios."""

    def test_full_workflow_like_alfred(self, tmp_path):
        """Test a full workflow similar to Alfred's actual usage."""
        toml_content = """
[tool.poetry]
name = "alfred"
version = "0.1.7"

[tool.poetry.dependencies]
python = "^3.14"

[tool.alfred.settings_schema.ALFRED_VERSION]
type = "string"
source = "toml"
toml_path = "tool.poetry.version"
category = "build"
export_to_env_make = true

[tool.alfred.settings_schema.HOST]
type = "string"
source = "env"
default = "0.0.0.0"
category = "app"

[tool.alfred.settings_schema.PORT]
type = "integer"
source = "env"
default = 3080
category = "app"

[tool.alfred.settings_schema.JWT_SECRET]
type = "secret"
source = "generated"
secret_rule = "32:hex"
category = "security"

[tool.alfred.settings_schema.MONGO_HOST]
type = "string"
source = "env"
default = "mongodb"
category = "database"

[tool.alfred.settings_schema.MONGO_PASSWORD]
type = "secret"
source = "generated"
secret_rule = "16:hex"
category = "security"

[tool.alfred.settings_schema.MONGO_URI]
type = "computed"
source = "computed"
compute_from = ["MONGO_HOST", "MONGO_PASSWORD"]
compute_template = "mongodb://user:{MONGO_PASSWORD}@{MONGO_HOST}:27017/db"
category = "database"

[tool.alfred.settings_schema.DEBUG_MODE]
type = "boolean"
source = "env"
default = false
category = "app"
"""
        (tmp_path / "pyproject.toml").write_text(toml_content)

        env_example_content = """# Application settings
HOST=0.0.0.0
PORT=3080
DEBUG_MODE=false

# Security
JWT_SECRET=

# Database
MONGO_HOST=mongodb
MONGO_PASSWORD=
MONGO_URI=

# Build info
ALFRED_VERSION=
"""
        (tmp_path / ".env.example").write_text(env_example_content)

        from alfred.settings_schema import load_schema

        schema = load_schema(tmp_path)
        source = ConfigSource.from_base_dir(tmp_path)

        # First bootstrap
        bootstrapper1 = SettingsBootstrap(source, schema)
        bootstrapper1.bootstrap()

        env_content_1 = source.env_path.read_text()

        # Verify structure
        assert "# Application settings" in env_content_1
        assert "HOST=0.0.0.0" in env_content_1
        assert "PORT=3080" in env_content_1
        assert "DEBUG_MODE=false" in env_content_1  # lowercase!
        assert "ALFRED_VERSION=0.1.7" in env_content_1
        assert "JWT_SECRET=" in env_content_1
        assert len([l for l in env_content_1.split("\n") if "JWT_SECRET=" in l][0]) > 20
        assert "MONGO_URI=mongodb://user:" in env_content_1

        # Second bootstrap - should preserve everything
        bootstrapper2 = SettingsBootstrap(source, schema)
        bootstrapper2.bootstrap()

        env_content_2 = source.env_path.read_text()

        # Everything should be identical
        assert env_content_1 == env_content_2

        # Add custom variable
        with open(source.env_path, "a") as f:
            f.write("\nMY_CUSTOM_SETTING=test123\n")

        # Third bootstrap - should preserve custom
        bootstrapper3 = SettingsBootstrap(source, schema)
        bootstrapper3.bootstrap()

        env_content_3 = source.env_path.read_text()

        assert "MY_CUSTOM_SETTING=test123" in env_content_3
        assert "# --- CUSTOM VARIABLES ---" in env_content_3