#!/usr/bin/env python3
"""
Test case definitions for deb-bootc-image-builder.

This module defines test cases and test data for various scenarios,
including:
- Basic functionality tests
- Edge case tests
- Error condition tests
- Debian-specific test cases
"""

import pytest
import os
import tempfile
import shutil
import json
import yaml
from typing import Dict, List, Any, Optional
import logging

# Configure logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)


class TestCaseDefinitions:
    """Test case definitions for deb-bootc-image-builder."""

    @staticmethod
    def get_basic_functionality_tests() -> List[Dict[str, Any]]:
        """Get basic functionality test cases."""
        return [
            {
                "name": "basic_debian_image_build",
                "description": "Test basic Debian image building functionality",
                "container": "debian:trixie",
                "release": "trixie",
                "arch": "amd64",
                "image_type": "qcow2",
                "packages": ["linux-image-amd64", "systemd", "ostree"],
                "expected_result": "success"
            },
            {
                "name": "debian_with_custom_packages",
                "description": "Test Debian image building with custom packages",
                "container": "debian:bookworm",
                "release": "bookworm",
                "arch": "amd64",
                "image_type": "qcow2",
                "packages": [
                    "linux-image-amd64",
                    "systemd",
                    "ostree",
                    "grub-efi-amd64",
                    "initramfs-tools",
                    "sudo",
                    "network-manager"
                ],
                "expected_result": "success"
            },
            {
                "name": "debian_arm64_build",
                "description": "Test Debian ARM64 image building",
                "container": "debian:trixie",
                "release": "trixie",
                "arch": "arm64",
                "image_type": "qcow2",
                "packages": ["linux-image-arm64", "systemd", "ostree"],
                "expected_result": "success"
            }
        ]

    @staticmethod
    def get_edge_case_tests() -> List[Dict[str, Any]]:
        """Get edge case test cases."""
        return [
            {
                "name": "empty_package_list",
                "description": "Test building with empty package list",
                "container": "debian:trixie",
                "release": "trixie",
                "arch": "amd64",
                "image_type": "qcow2",
                "packages": [],
                "expected_result": "error",
                "expected_error": "No packages specified"
            },
            {
                "name": "invalid_release",
                "description": "Test building with invalid Debian release",
                "container": "debian:trixie",
                "release": "invalid-release",
                "arch": "amd64",
                "image_type": "qcow2",
                "packages": ["linux-image-amd64"],
                "expected_result": "error",
                "expected_error": "Invalid Debian release"
            },
            {
                "name": "invalid_architecture",
                "description": "Test building with invalid architecture",
                "container": "debian:trixie",
                "release": "trixie",
                "arch": "invalid-arch",
                "image_type": "qcow2",
                "packages": ["linux-image-amd64"],
                "expected_result": "error",
                "expected_error": "Invalid architecture"
            },
            {
                "name": "very_long_package_list",
                "description": "Test building with very long package list",
                "container": "debian:trixie",
                "release": "trixie",
                "arch": "amd64",
                "image_type": "qcow2",
                "packages": [f"package-{i}" for i in range(1000)],
                "expected_result": "success"
            }
        ]

    @staticmethod
    def get_error_condition_tests() -> List[Dict[str, Any]]:
        """Get error condition test cases."""
        return [
            {
                "name": "invalid_container_image",
                "description": "Test building with invalid container image",
                "container": "invalid:image",
                "release": "trixie",
                "arch": "amd64",
                "image_type": "qcow2",
                "packages": ["linux-image-amd64"],
                "expected_result": "error",
                "expected_error": "Invalid container image"
            },
            {
                "name": "network_failure",
                "description": "Test building with network failure simulation",
                "container": "debian:trixie",
                "release": "trixie",
                "arch": "amd64",
                "image_type": "qcow2",
                "packages": ["linux-image-amd64"],
                "expected_result": "error",
                "expected_error": "Network error",
                "simulate_network_failure": True
            },
            {
                "name": "disk_space_exhaustion",
                "description": "Test building with disk space exhaustion",
                "container": "debian:trixie",
                "release": "trixie",
                "arch": "amd64",
                "image_type": "qcow2",
                "packages": ["linux-image-amd64"],
                "expected_result": "error",
                "expected_error": "Disk space exhausted",
                "simulate_disk_full": True
            }
        ]

    @staticmethod
    def get_debian_specific_tests() -> List[Dict[str, Any]]:
        """Get Debian-specific test cases."""
        return [
            {
                "name": "debian_trixie_minimal",
                "description": "Test Debian Trixie minimal image",
                "container": "debian:trixie",
                "release": "trixie",
                "arch": "amd64",
                "image_type": "qcow2",
                "packages": [
                    "linux-image-amd64",
                    "systemd",
                    "ostree",
                    "grub-efi-amd64",
                    "initramfs-tools"
                ],
                "debian_specific": {
                    "initramfs_tools": True,
                    "grub_efi": True,
                    "ostree_integration": True
                },
                "expected_result": "success"
            },
            {
                "name": "debian_bookworm_desktop",
                "description": "Test Debian Bookworm desktop image",
                "container": "debian:bookworm",
                "release": "bookworm",
                "arch": "amd64",
                "image_type": "qcow2",
                "packages": [
                    "linux-image-amd64",
                    "systemd",
                    "ostree",
                    "grub-efi-amd64",
                    "initramfs-tools",
                    "task-desktop",
                    "xorg",
                    "lightdm"
                ],
                "debian_specific": {
                    "initramfs_tools": True,
                    "grub_efi": True,
                    "ostree_integration": True,
                    "desktop_environment": True
                },
                "expected_result": "success"
            },
            {
                "name": "debian_bullseye_server",
                "description": "Test Debian Bullseye server image",
                "container": "debian:bullseye",
                "release": "bullseye",
                "arch": "amd64",
                "image_type": "qcow2",
                "packages": [
                    "linux-image-amd64",
                    "systemd",
                    "ostree",
                    "grub-efi-amd64",
                    "initramfs-tools",
                    "openssh-server",
                    "nginx",
                    "postgresql"
                ],
                "debian_specific": {
                    "initramfs_tools": True,
                    "grub_efi": True,
                    "ostree_integration": True,
                    "server_services": True
                },
                "expected_result": "success"
            }
        ]

    @staticmethod
    def get_performance_tests() -> List[Dict[str, Any]]:
        """Get performance test cases."""
        return [
            {
                "name": "small_image_build_time",
                "description": "Test build time for small image",
                "container": "debian:trixie",
                "release": "trixie",
                "arch": "amd64",
                "image_type": "qcow2",
                "packages": ["linux-image-amd64", "systemd"],
                "performance_requirements": {
                    "max_build_time": 300,  # 5 minutes
                    "max_image_size": 1024  # 1GB
                },
                "expected_result": "success"
            },
            {
                "name": "large_image_build_time",
                "description": "Test build time for large image",
                "container": "debian:trixie",
                "release": "trixie",
                "arch": "amd64",
                "image_type": "qcow2",
                "packages": [f"package-{i}" for i in range(500)],
                "performance_requirements": {
                    "max_build_time": 1800,  # 30 minutes
                    "max_image_size": 10240  # 10GB
                },
                "expected_result": "success"
            }
        ]

    @staticmethod
    def get_integration_tests() -> List[Dict[str, Any]]:
        """Get integration test cases."""
        return [
            {
                "name": "full_pipeline_test",
                "description": "Test complete image building pipeline",
                "container": "debian:trixie",
                "release": "trixie",
                "arch": "amd64",
                "image_type": "qcow2",
                "packages": [
                    "linux-image-amd64",
                    "systemd",
                    "ostree",
                    "grub-efi-amd64",
                    "initramfs-tools"
                ],
                "pipeline_stages": [
                    "filesystem_setup",
                    "package_installation",
                    "ostree_integration",
                    "bootloader_configuration",
                    "image_generation"
                ],
                "expected_result": "success"
            },
            {
                "name": "cross_architecture_test",
                "description": "Test cross-architecture building",
                "container": "debian:trixie",
                "release": "trixie",
                "architectures": ["amd64", "arm64"],
                "image_type": "qcow2",
                "packages": ["linux-image-amd64", "systemd", "ostree"],
                "expected_result": "success"
            }
        ]


class TestDataGenerator:
    """Generate test data for various test scenarios."""

    @staticmethod
    def generate_manifest(test_case: Dict[str, Any]) -> Dict[str, Any]:
        """Generate a manifest from a test case."""
        manifest = {
            "pipeline": {
                "build": {
                    "name": "org.osbuild.debian-filesystem",
                    "options": {
                        "rootfs_type": "ext4",
                        "ostree_integration": True,
                        "home_symlink": True
                    }
                },
                "stages": [
                    {
                        "name": "org.osbuild.apt",
                        "options": {
                            "packages": test_case.get("packages", []),
                            "release": test_case.get("release", "trixie"),
                            "arch": test_case.get("arch", "amd64")
                        }
                    }
                ]
            }
        }
        
        # Add Debian-specific stages if specified
        if test_case.get("debian_specific", {}).get("grub_efi"):
            manifest["pipeline"]["stages"].append({
                "name": "org.osbuild.debian-grub",
                "options": {
                    "uefi": True,
                    "secure_boot": False,
                    "timeout": 5
                }
            })
        
        if test_case.get("debian_specific", {}).get("initramfs_tools"):
            manifest["pipeline"]["stages"].append({
                "name": "org.osbuild.debian-kernel",
                "options": {
                    "kernel_package": f"linux-image-{test_case.get('arch', 'amd64')}",
                    "initramfs_tools": True,
                    "ostree_integration": True
                }
            })
        
        return manifest

    @staticmethod
    def generate_test_environment(test_case: Dict[str, Any]) -> Dict[str, Any]:
        """Generate test environment configuration."""
        return {
            "work_dir": "/tmp/test-env",
            "output_dir": "/tmp/test-output",
            "cache_dir": "/tmp/test-cache",
            "temp_dir": "/tmp/test-temp",
            "network_enabled": not test_case.get("simulate_network_failure", False),
            "disk_space_available": not test_case.get("simulate_disk_full", False)
        }

    @staticmethod
    def generate_expected_output(test_case: Dict[str, Any]) -> Dict[str, Any]:
        """Generate expected output for a test case."""
        expected_output = {
            "status": test_case.get("expected_result", "success"),
            "image_type": test_case.get("image_type", "qcow2"),
            "architecture": test_case.get("arch", "amd64"),
            "release": test_case.get("release", "trixie")
        }
        
        if test_case.get("expected_result") == "success":
            expected_output["image_path"] = f"/tmp/test-output/debian-{test_case.get('release')}-{test_case.get('arch')}.{test_case.get('image_type')}"
            expected_output["build_log"] = "Build completed successfully"
        else:
            expected_output["error"] = test_case.get("expected_error", "Unknown error")
            expected_output["build_log"] = f"Build failed: {test_case.get('expected_error', 'Unknown error')}"
        
        return expected_output


def load_test_cases_from_file(file_path: str) -> List[Dict[str, Any]]:
    """Load test cases from a file."""
    try:
        with open(file_path, 'r') as f:
            if file_path.endswith('.json'):
                return json.load(f)
            elif file_path.endswith('.yaml') or file_path.endswith('.yml'):
                return yaml.safe_load(f)
            else:
                raise ValueError(f"Unsupported file format: {file_path}")
    except Exception as e:
        logger.error(f"Failed to load test cases from {file_path}: {e}")
        return []


def save_test_cases_to_file(test_cases: List[Dict[str, Any]], file_path: str) -> bool:
    """Save test cases to a file."""
    try:
        with open(file_path, 'w') as f:
            if file_path.endswith('.json'):
                json.dump(test_cases, f, indent=2)
            elif file_path.endswith('.yaml') or file_path.endswith('.yml'):
                yaml.dump(test_cases, f, default_flow_style=False)
            else:
                raise ValueError(f"Unsupported file format: {file_path}")
        return True
    except Exception as e:
        logger.error(f"Failed to save test cases to {file_path}: {e}")
        return False


def validate_test_case(test_case: Dict[str, Any]) -> Dict[str, Any]:
    """Validate a test case definition."""
    validation_result = {
        "valid": True,
        "errors": [],
        "warnings": []
    }
    
    # Check required fields
    required_fields = ["name", "description", "container", "release", "arch", "image_type", "packages"]
    for field in required_fields:
        if field not in test_case:
            validation_result["valid"] = False
            validation_result["errors"].append(f"Missing required field: {field}")
    
    # Check field types
    if "packages" in test_case and not isinstance(test_case["packages"], list):
        validation_result["valid"] = False
        validation_result["errors"].append("Packages field must be a list")
    
    if "arch" in test_case and test_case["arch"] not in ["amd64", "arm64", "i386"]:
        validation_result["warnings"].append(f"Unsupported architecture: {test_case['arch']}")
    
    if "release" in test_case and test_case["release"] not in ["trixie", "bookworm", "bullseye"]:
        validation_result["warnings"].append(f"Unsupported Debian release: {test_case['release']}")
    
    return validation_result


if __name__ == "__main__":
    # Test the test case definitions
    test_cases = TestCaseDefinitions.get_basic_functionality_tests()
    print(f"Generated {len(test_cases)} basic functionality test cases")
    
    for test_case in test_cases:
        manifest = TestDataGenerator.generate_manifest(test_case)
        print(f"Generated manifest for {test_case['name']}: {len(manifest['pipeline']['stages'])} stages")
        
        validation = validate_test_case(test_case)
        print(f"Validation for {test_case['name']}: {'Valid' if validation['valid'] else 'Invalid'}")
        if validation['errors']:
            print(f"  Errors: {validation['errors']}")
        if validation['warnings']:
            print(f"  Warnings: {validation['warnings']}")