from datetime import datetime

from pydantic import BaseModel, Field


class BackupManifest(BaseModel):
    backup_id: str
    created_at: datetime
    app_version: str
    backup_type: str = "full"
    database_url_host_anonymized: str
    database_name: str
    storage_base_path: str
    included_sections: list[str] = Field(default_factory=list)
    file_count: int = 0
    total_size_bytes: int = 0
    checksum_sha256: str
    created_by_user_id: int | None = None
    created_by_username: str = ""


class BackupSummary(BaseModel):
    filename: str
    size_bytes: int
    created_at: datetime | None = None
    app_version: str = ""
    backup_type: str = "full"
    database_name: str = ""
    storage_base_path: str = ""
    file_count: int = 0
    total_size_bytes: int = 0
    created_by_user_id: int | None = None
    created_by_username: str = ""
    validation_status: str = "valid"
    validation_message: str = ""


class BackupListResponse(BaseModel):
    items: list[BackupSummary] = Field(default_factory=list)
    total_count: int = 0
    total_size_bytes: int = 0
    latest_backup_at: datetime | None = None


class BackupValidationResponse(BaseModel):
    filename: str
    valid: bool
    message: str
    issues: list[str] = Field(default_factory=list)
    checksum_valid: bool = False
    restore_supported: bool = False
    requires_cli_restore: bool = True
    manifest: BackupManifest | None = None


class BackupRestoreRequest(BaseModel):
    confirm_text: str