from datetime import datetime
from typing import Literal

from pydantic import BaseModel


class BackupResponse(BaseModel):
    id: int
    router_id: int
    router_name: str | None = None
    file_path: str
    file_name: str
    backup_type: str
    checksum: str | None = None
    file_size: int | None = None
    created_at: datetime

    model_config = {'from_attributes': True}


class BackupDiffLine(BaseModel):
    type: Literal['context', 'added', 'removed', 'modified']
    left_number: int | None = None
    right_number: int | None = None
    left_text: str = ''
    right_text: str = ''


class BackupDiffStats(BaseModel):
    added: int = 0
    removed: int = 0
    modified: int = 0
    context: int = 0


class BackupDiffResponse(BaseModel):
    left_backup_id: int
    right_backup_id: int
    left_file_name: str | None = None
    right_file_name: str | None = None
    diff_text: str
    diff_html: str | None = None
    stats: BackupDiffStats | None = None
    lines: list[BackupDiffLine] = []


class BulkActionRequest(BaseModel):
    action: Literal['download', 'delete']
    backup_ids: list[int]