"""
Command-line interface for llama_backup.

This module provides a CLI for using llama_backup functionality.
"""

import argparse
import json
import logging
import os
import sys
from enum import Enum
from typing import Any, Dict, List

# Import from missing file commented out
# from .backup import BackupVault, RetentionPolicy, StorageTier


# --- Dummy Placeholders for missing backup.py imports ---
class StorageTier(Enum):
    HOT = "hot"
    COLD = "cold"
    ARCHIVE = "archive"


class RetentionPolicy(Enum):
    SHORT_TERM = "short"
    MEDIUM_TERM = "medium"
    LONG_TERM = "long"


class BackupVault:
    """Dummy placeholder for the missing BackupVault class."""

    def __init__(
        self,
        storage_path: str,
        chunk_size: int,
        compression_level: int,
        security_key_path: str,
        blockchain_url: str,
    ):
        logger.info(f"Dummy BackupVault initialized with path: {storage_path}")
        self.storage_path = storage_path
        # Store other args if needed for dummy methods

    def backup(
        self,
        source_path: str,
        retention_policy: RetentionPolicy,
        storage_tier: StorageTier,
        verify: bool,
    ) -> str:
        logger.info(f"[DUMMY] Backup called for {source_path}")
        return "dummy-job-id-123"

    def restore(self, job_id: str, destination: str, verify: bool) -> bool:
        logger.info(f"[DUMMY] Restore called for job {job_id} to {destination}")
        return True

    def verify_backup(self, job_id: str) -> Dict[str, Any]:
        logger.info(f"[DUMMY] Verify called for job {job_id}")
        return {"passed": True, "verified_chunks": 10, "errors": []}

    def list_backups(self) -> List[Dict[str, Any]]:
        logger.info("[DUMMY] List backups called")
        return [
            {
                "job_id": "dummy-job-id-123",
                "status": "completed",
                "source_path": "/dummy/source",
                "started_at": "2023-01-01T10:00:00",
                "size_bytes": 1024 * 1024 * 5,
            }
        ]

    def search_backups(self, query: str, job_id: Optional[str]) -> List[Dict[str, Any]]:
        logger.info(f"[DUMMY] Search called with query: {query}")
        return [
            {
                "chunk_id": "dummy-chunk-abc",
                "original_path": "/dummy/source/file.txt",
                "size_bytes": 1024 * 10,
            }
        ]

    def delete_backup(self, job_id: str, secure: bool) -> bool:
        logger.info(f"[DUMMY] Delete called for job {job_id}")
        return True

    def apply_lifecycle_policy(self) -> Dict[str, int]:
        logger.info("[DUMMY] Apply lifecycle policy called")
        return {"archived": 2, "deleted": 1}

    def create_snapshot(self, job_id: str) -> str:
        logger.info(f"[DUMMY] Create snapshot called for job {job_id}")
        return f"/path/to/snapshot-{job_id}.meta"

    def simulate_recovery(self, job_id: str) -> Dict[str, Any]:
        logger.info(f"[DUMMY] Simulate recovery called for job {job_id}")
        return {
            "recoverable": True,
            "simulated_chunks": 10,
            "estimated_recovery_time_seconds": 15.5,
            "errors": [],
        }

    def migrate_storage(self, job_id: str, new_tier: StorageTier) -> Dict[str, int]:
        logger.info(f"[DUMMY] Migrate storage called for job {job_id} to {new_tier.value}")
        return {"migrated_chunks": 5, "failed_chunks": 0}


# --- End Dummy Placeholders ---

# Configure logging
logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
)
logger = logging.getLogger("llama_backup.cli")


def parse_args():
    """Parse command-line arguments."""
    parser = argparse.ArgumentParser(
        description="llama_backup: Advanced secure backup management system with ML capabilities"
    )

    # General arguments
    parser.add_argument(
        "--storage-path",
        "-s",
        type=str,
        default=os.environ.get("LLAMA_BACKUP_STORAGE_PATH", "./llama_backup_storage"),
        help="Path to storage directory",
    )
    parser.add_argument(
        "--chunk-size",
        "-c",
        type=int,
        default=int(os.environ.get("LLAMA_BACKUP_CHUNK_SIZE", 1024 * 1024)),
        help="Chunk size in bytes",
    )
    parser.add_argument(
        "--compression-level",
        "-l",
        type=int,
        default=int(os.environ.get("LLAMA_BACKUP_COMPRESSION_LEVEL", 7)),
        help="Compression level (1-9)",
    )
    parser.add_argument(
        "--key-path",
        "-k",
        type=str,
        default=os.environ.get("LLAMA_BACKUP_KEY_PATH"),
        help="Path to encryption key file",
    )
    parser.add_argument(
        "--blockchain-url",
        "-b",
        type=str,
        default=os.environ.get("LLAMA_BACKUP_BLOCKCHAIN_URL"),
        help="Blockchain verification URL",
    )
    parser.add_argument("--verbose", "-v", action="store_true", help="Enable verbose logging")

    # Subcommands
    subparsers = parser.add_subparsers(dest="command", help="Command to execute")

    # Backup command
    backup_parser = subparsers.add_parser("backup", help="Create a backup")
    backup_parser.add_argument("source_path", type=str, help="Path to backup")
    backup_parser.add_argument(
        "--retention",
        type=str,
        choices=[p.value for p in RetentionPolicy],
        default=RetentionPolicy.MEDIUM_TERM.value,
        help="Retention policy",
    )
    backup_parser.add_argument(
        "--tier",
        type=str,
        choices=[t.value for t in StorageTier],
        default=StorageTier.HOT.value,
        help="Storage tier",
    )
    backup_parser.add_argument(
        "--no-verify", action="store_true", help="Skip verification after backup"
    )

    # Restore command
    restore_parser = subparsers.add_parser("restore", help="Restore a backup")
    restore_parser.add_argument("job_id", type=str, help="ID of the backup job to restore")
    restore_parser.add_argument("destination", type=str, help="Destination path")
    restore_parser.add_argument(
        "--no-verify", action="store_true", help="Skip verification during restoration"
    )

    # Verify command
    verify_parser = subparsers.add_parser("verify", help="Verify a backup")
    verify_parser.add_argument("job_id", type=str, help="ID of the backup job to verify")

    # List command
    list_parser = subparsers.add_parser("list", help="List backups")
    list_parser.add_argument("--json", action="store_true", help="Output in JSON format")

    # Search command
    search_parser = subparsers.add_parser("search", help="Search backups")
    search_parser.add_argument("query", type=str, help="Search query")
    search_parser.add_argument("--job-id", type=str, help="Restrict search to specific job")
    search_parser.add_argument("--json", action="store_true", help="Output in JSON format")

    # Delete command
    delete_parser = subparsers.add_parser("delete", help="Delete a backup")
    delete_parser.add_argument("job_id", type=str, help="ID of the backup job to delete")
    delete_parser.add_argument(
        "--force", action="store_true", help="Force deletion without confirmation"
    )
    delete_parser.add_argument("--no-secure", action="store_true", help="Skip secure deletion")

    # Lifecycle command
    lifecycle_parser = subparsers.add_parser("lifecycle", help="Apply lifecycle policies")

    # Snapshot command
    snapshot_parser = subparsers.add_parser("snapshot", help="Create a snapshot")
    snapshot_parser.add_argument("job_id", type=str, help="ID of the backup job to snapshot")

    # Simulate command
    simulate_parser = subparsers.add_parser("simulate", help="Simulate recovery")
    simulate_parser.add_argument("job_id", type=str, help="ID of the backup job to simulate")

    # Migrate command
    migrate_parser = subparsers.add_parser("migrate", help="Migrate storage tier")
    migrate_parser.add_argument("job_id", type=str, help="ID of the backup job to migrate")
    migrate_parser.add_argument(
        "tier",
        type=str,
        choices=[t.value for t in StorageTier],
        help="Target storage tier",
    )

    return parser.parse_args()


def main():
    """Main CLI entry point."""
    args = parse_args()

    # Configure logging
    if args.verbose:
        logging.getLogger("llama_backup").setLevel(logging.DEBUG)

    # Initialize the backup vault
    vault = BackupVault(
        storage_path=args.storage_path,
        chunk_size=args.chunk_size,
        compression_level=args.compression_level,
        security_key_path=args.key_path,
        blockchain_url=args.blockchain_url,
    )

    # Execute command
    if args.command == "backup":
        # Create a backup
        try:
            job_id = vault.backup(
                source_path=args.source_path,
                retention_policy=RetentionPolicy(args.retention),
                storage_tier=StorageTier(args.tier),
                verify=not args.no_verify,
            )
            print(f"Backup completed: {job_id}")
        except Exception as e:
            logger.error(f"Backup failed: {str(e)}")
            sys.exit(1)

    elif args.command == "restore":
        # Restore a backup
        try:
            success = vault.restore(
                job_id=args.job_id,
                destination=args.destination,
                verify=not args.no_verify,
            )
            if success:
                print("Restore completed successfully")
            else:
                print("Restore failed")
                sys.exit(1)
        except Exception as e:
            logger.error(f"Restore failed: {str(e)}")
            sys.exit(1)

    elif args.command == "verify":
        # Verify a backup
        try:
            results = vault.verify_backup(args.job_id)
            if results["passed"]:
                print(f"Verification passed: {results['verified_chunks']} chunks verified")
            else:
                print("Verification failed:")
                for error in results["errors"]:
                    print(f"  - {error}")
                sys.exit(1)
        except Exception as e:
            logger.error(f"Verification failed: {str(e)}")
            sys.exit(1)

    elif args.command == "list":
        # List backups
        try:
            backups = vault.list_backups()
            if args.json:
                print(json.dumps(backups, indent=2))
            else:
                if not backups:
                    print("No backups found")
                else:
                    print(f"Found {len(backups)} backups:")
                    for backup in backups:
                        status = backup["status"]
                        job_id = backup["job_id"]
                        source = backup["source_path"]
                        started = backup.get("started_at", "Unknown")
                        size = backup.get("size_bytes", 0)
                        print(
                            f"  {job_id}: {status} - {source} - {started} - {size/1024/1024:.2f} MB"
                        )
        except Exception as e:
            logger.error(f"List failed: {str(e)}")
            sys.exit(1)

    elif args.command == "search":
        # Search backups
        try:
            results = vault.search_backups(query=args.query, job_id=args.job_id)
            if args.json:
                print(json.dumps(results, indent=2))
            else:
                if not results:
                    print("No matches found")
                else:
                    print(f"Found {len(results)} matches:")
                    for result in results:
                        chunk_id = result["chunk_id"]
                        path = result["original_path"]
                        size = result["size_bytes"]
                        print(f"  {chunk_id}: {path} - {size/1024/1024:.2f} MB")
        except Exception as e:
            logger.error(f"Search failed: {str(e)}")
            sys.exit(1)

    elif args.command == "delete":
        # Delete a backup
        if not args.force:
            confirm = input(f"Are you sure you want to delete backup {args.job_id}? [y/N] ")
            if confirm.lower() != "y":
                print("Deletion canceled")
                return

        try:
            success = vault.delete_backup(job_id=args.job_id, secure=not args.no_secure)
            if success:
                print(f"Backup {args.job_id} deleted successfully")
            else:
                print("Deletion failed")
                sys.exit(1)
        except Exception as e:
            logger.error(f"Deletion failed: {str(e)}")
            sys.exit(1)

    elif args.command == "lifecycle":
        # Apply lifecycle policies
        try:
            results = vault.apply_lifecycle_policy()
            print("Lifecycle policy applied:")
            for action, count in results.items():
                print(f"  {action}: {count}")
        except Exception as e:
            logger.error(f"Lifecycle policy failed: {str(e)}")
            sys.exit(1)

    elif args.command == "snapshot":
        # Create a snapshot
        try:
            snapshot_path = vault.create_snapshot(args.job_id)
            print(f"Snapshot created: {snapshot_path}")
        except Exception as e:
            logger.error(f"Snapshot failed: {str(e)}")
            sys.exit(1)

    elif args.command == "simulate":
        # Simulate recovery
        try:
            results = vault.simulate_recovery(args.job_id)
            if results["recoverable"]:
                print(f"Recovery simulation passed: {results['simulated_chunks']} chunks simulated")
                print(
                    f"Estimated recovery time: {results['estimated_recovery_time_seconds']:.2f} seconds"
                )
            else:
                print("Recovery simulation failed:")
                for error in results["errors"]:
                    print(f"  - {error}")
                sys.exit(1)
        except Exception as e:
            logger.error(f"Simulation failed: {str(e)}")
            sys.exit(1)

    elif args.command == "migrate":
        # Migrate storage tier
        try:
            results = vault.migrate_storage(job_id=args.job_id, new_tier=StorageTier(args.tier))
            print(f"Migration completed: {results['migrated_chunks']} chunks migrated")
            if results["failed_chunks"] > 0:
                print(f"Warning: {results['failed_chunks']} chunks failed to migrate")
        except Exception as e:
            logger.error(f"Migration failed: {str(e)}")
            sys.exit(1)

    else:
        # Unknown command or no command specified
        print("Please specify a command. Use --help for usage information.")
        sys.exit(1)


if __name__ == "__main__":
    main()
