from __future__ import annotations

import ctypes
import os
import platform
import stat

from dataclasses import dataclass

# Ensure we are on macOS
assert platform.system() == "Darwin"

# Load libc for system calls
libc = ctypes.CDLL("/usr/lib/libSystem.dylib")


# 1. Basic File Metadata (lstat)
@dataclass
class BasicFileMetadata:
    file_type: str
    permissions: int
    inode: int
    device_id: int
    num_links: int
    user_id: int
    group_id: int
    size: int
    block_size: int
    num_blocks: int
    access_time: float
    modification_time: float
    status_change_time: float

    @classmethod
    def from_lstat(cls, filepath: str) -> BasicFileMetadata:
        stat_result = os.lstat(filepath)
        return cls(
            file_type=cls._get_file_type(stat_result.st_mode),
            permissions=stat_result.st_mode,
            inode=stat_result.st_ino,
            device_id=stat_result.st_dev,
            num_links=stat_result.st_nlink,
            user_id=stat_result.st_uid,
            group_id=stat_result.st_gid,
            size=stat_result.st_size,
            block_size=stat_result.st_blksize,
            num_blocks=stat_result.st_blocks,
            access_time=stat_result.st_atime,
            modification_time=stat_result.st_mtime,
            status_change_time=stat_result.st_ctime,
        )

    @staticmethod
    def _get_file_type(mode: int) -> str:
        if stat.S_ISDIR(mode):
            return "directory"
        if stat.S_ISREG(mode):
            return "file"
        if stat.S_ISLNK(mode):
            return "symlink"
        raise ValueError(f"Invalid mode: {mode}")


# 2. Extended File Metadata (Using getattrlist and getxattr)
@dataclass
class ExtendedFileMetadata:
    finder_info: dict[str, str] | None = None
    extended_attributes: dict[str, bytes] | None = None
    acl_info: list[str] | None = None
    quarantine_flags: str | None = None

    @classmethod
    def from_file(cls, filepath: str) -> ExtendedFileMetadata:
        # Placeholder implementation for gathering extended attributes and other metadata
        # Actual implementation would use getattrlist, getxattr, etc.
        return cls(
            finder_info=None,  # To be filled in
            extended_attributes=None,  # To be filled in
            acl_info=None,  # To be filled in
            quarantine_flags=None,  # To be filled in
        )


# 3. File System Information
@dataclass
class FileSystemInformation:
    filesystem_type: str
    volume_name: str
    volume_uuid: str | None
    total_blocks: int
    free_blocks: int
    available_blocks: int
    total_files: int
    free_files: int

    @classmethod
    def from_statfs(cls, filepath: str) -> FileSystemInformation:
        fs_info = os.statvfs(filepath)
        return cls(
            filesystem_type="unknown",
            volume_name=os.path.abspath(filepath),
            volume_uuid=None,  # Placeholder, could be retrieved via volume APIs
            total_blocks=fs_info.f_blocks,
            free_blocks=fs_info.f_bfree,
            available_blocks=fs_info.f_bavail,
            total_files=fs_info.f_files,
            free_files=fs_info.f_ffree,
        )


# 4. File System Extents (fcntl with F_LOG2PHYS)
@dataclass
class FileSystemExtents:
    physical_block_addresses: list[tuple[int, int]]  # (offset, length) in blocks

    @classmethod
    def from_fcntl(cls, filepath: str) -> FileSystemExtents:
        # Placeholder for fcntl with F_LOG2PHYS implementation
        return cls(
            physical_block_addresses=[]  # To be filled in
        )


# 5. File Integrity and Security
@dataclass
class FileIntegritySecurity:
    integrity_status: str | None = None
    gatekeeper_status: str | None = None

    @classmethod
    def from_file(cls, filepath: str) -> FileIntegritySecurity:
        # Placeholder for File Integrity and Gatekeeper status
        return cls(
            integrity_status=None,  # To be filled in
            gatekeeper_status=None,  # To be filled in
        )


# 6. Metadata Used by Spotlight (mdls)
@dataclass
class SpotlightMetadata:
    spotlight_data: dict[str, str] | None = None
    tags_labels: list[str] | None = None

    @classmethod
    def from_mdls(cls, filepath: str) -> SpotlightMetadata:
        # Placeholder for Spotlight metadata retrieval
        return cls(
            spotlight_data=None,  # To be filled in
            tags_labels=None,  # To be filled in
        )


# 7. Backup Information (Time Machine)
@dataclass
class BackupInformation:
    backup_status: str | None = None
    snapshot_info: str | None = None

    @classmethod
    def from_file(cls, filepath: str) -> BackupInformation:
        # Placeholder for Time Machine backup status and snapshot info
        return cls(
            backup_status=None,  # To be filled in
            snapshot_info=None,  # To be filled in
        )


# 8. Resource Forks and Alternate Data Streams
@dataclass
class ResourceForks:
    resource_fork_data: bytes | None = None

    @classmethod
    def from_file(cls, filepath: str) -> ResourceForks:
        # Placeholder for resource fork data retrieval
        return cls(
            resource_fork_data=None  # To be filled in
        )


# 9. File Signature and Code Signing Information
@dataclass
class CodeSignatureInformation:
    code_signature: str | None = None
    entitlements: dict[str, str] | None = None

    @classmethod
    def from_file(cls, filepath: str) -> CodeSignatureInformation:
        # Placeholder for code signing and entitlements retrieval
        return cls(
            code_signature=None,  # To be filled in
            entitlements=None,  # To be filled in
        )


# 10. File System Event Notifications (FSEvents)
@dataclass
class FileSystemEventNotifications:
    recent_events: list[str] | None = None

    @classmethod
    def from_file(cls, filepath: str) -> FileSystemEventNotifications:
        # Placeholder for FSEvents monitoring and retrieval
        return cls(
            recent_events=None  # To be filled in
        )


# Combined Extended MacOS Stat Class
@dataclass
class ExtendedMacOSStat:
    basic_metadata: BasicFileMetadata
    extended_metadata: ExtendedFileMetadata
    filesystem_info: FileSystemInformation
    filesystem_extents: FileSystemExtents
    integrity_security: FileIntegritySecurity
    spotlight_metadata: SpotlightMetadata
    backup_info: BackupInformation
    resource_forks: ResourceForks
    code_signature_info: CodeSignatureInformation
    fs_event_notifications: FileSystemEventNotifications

    @classmethod
    def from_file(cls, filepath: str) -> ExtendedMacOSStat:
        return cls(
            basic_metadata=BasicFileMetadata.from_lstat(filepath),
            extended_metadata=ExtendedFileMetadata.from_file(filepath),
            filesystem_info=FileSystemInformation.from_statfs(filepath),
            filesystem_extents=FileSystemExtents.from_fcntl(filepath),
            integrity_security=FileIntegritySecurity.from_file(filepath),
            spotlight_metadata=SpotlightMetadata.from_mdls(filepath),
            backup_info=BackupInformation.from_file(filepath),
            resource_forks=ResourceForks.from_file(filepath),
            code_signature_info=CodeSignatureInformation.from_file(filepath),
            fs_event_notifications=FileSystemEventNotifications.from_file(filepath),
        )


# Example usage:
extended_info = ExtendedMacOSStat.from_file("/path/to/file")
print(extended_info)
