"""Tests for validation module."""

import pytest
from pathlib import Path
import tempfile


class TestValidator:
    """Test cases for schema validation."""

    def test_validate_missing_required(self):
        """Test validation catches missing required variables."""
        from env_pro.core.validator import Validator, Schema, VarSchema

        schema = Schema(variables={
            "DATABASE_URL": VarSchema(required=True),
            "API_KEY": VarSchema(required=True),
        })

        validator = Validator(schema)
        errors = validator.validate({"DATABASE_URL": "some-url"})

        error_keys = [e.key for e in errors]
        assert "API_KEY" in error_keys

    def test_validate_pattern_mismatch(self):
        """Test validation catches pattern mismatches."""
        from env_pro.core.validator import Validator, Schema, VarSchema

        schema = Schema(variables={
            "PORT": VarSchema(type="int", pattern=r"^\d+$"),
        })

        validator = Validator(schema)
        errors = validator.validate({"PORT": "abc"})

        assert len(errors) > 0
        assert errors[0].key == "PORT"

    def test_validate_min_length(self):
        """Test validation checks minimum length."""
        from env_pro.core.validator import Validator, Schema, VarSchema

        schema = Schema(variables={
            "PASSWORD": VarSchema(min_length=8),
        })

        validator = Validator(schema)
        errors = validator.validate({"PASSWORD": "short"})

        assert len(errors) > 0
        assert "PASSWORD" in [e.key for e in errors]

    def test_from_file_no_schema(self, temp_dir):
        """Test loading validator when no schema file exists."""
        from env_pro.core.validator import Validator

        import os
        os.chdir(temp_dir)

        validator = Validator.from_file()
        assert validator.schema is None

    def test_from_file_with_schema(self, temp_dir):
        """Test loading validator with schema file."""
        from env_pro.core.validator import Validator

        schema_content = """variables:
  DATABASE_URL:
    type: url
    required: true
"""
        (temp_dir / ".env.schema.yaml").write_text(schema_content)

        import os
        os.chdir(temp_dir)

        validator = Validator.from_file()
        assert validator.schema is not None