"""System-related schemas (health, version, displays)."""

from datetime import datetime
from typing import List, Literal

from pydantic import BaseModel, Field


class HealthResponse(BaseModel):
    """Health check response."""

    status: Literal["healthy", "unhealthy"] = Field(description="Service health status")
    timestamp: datetime = Field(description="Current server time")
    version: str = Field(description="Application version")


class VersionResponse(BaseModel):
    """Version information response."""

    version: str = Field(description="Application version")
    python_version: str = Field(description="Python version")
    api_version: str = Field(description="API version")


class DisplayInfo(BaseModel):
    """Display/monitor information."""

    index: int = Field(description="Display index")
    name: str = Field(description="Display name")
    width: int = Field(description="Display width in pixels")
    height: int = Field(description="Display height in pixels")
    x: int = Field(description="Display X position")
    y: int = Field(description="Display Y position")
    is_primary: bool = Field(default=False, description="Whether this is the primary display")
    refresh_rate: int = Field(description="Display refresh rate in Hz")


class DisplayListResponse(BaseModel):
    """List of available displays."""

    displays: List[DisplayInfo] = Field(description="Available displays")
    count: int = Field(description="Number of displays")


class ProcessListResponse(BaseModel):
    """List of running processes."""

    processes: List[str] = Field(description="Sorted list of unique process names")
    count: int = Field(description="Number of unique processes")


class GpuInfo(BaseModel):
    """GPU performance information."""

    name: str | None = Field(default=None, description="GPU device name")
    utilization: float | None = Field(default=None, description="GPU core usage percent")
    memory_used_mb: float | None = Field(default=None, description="GPU memory used in MB")
    memory_total_mb: float | None = Field(default=None, description="GPU total memory in MB")
    temperature_c: float | None = Field(default=None, description="GPU temperature in Celsius")


class PerformanceResponse(BaseModel):
    """System performance metrics."""

    cpu_percent: float = Field(description="System-wide CPU usage percent")
    ram_used_mb: float = Field(description="RAM used in MB")
    ram_total_mb: float = Field(description="RAM total in MB")
    ram_percent: float = Field(description="RAM usage percent")
    gpu: GpuInfo | None = Field(default=None, description="GPU info (null if unavailable)")
    timestamp: datetime = Field(description="Measurement timestamp")


class RestoreResponse(BaseModel):
    """Response after restoring configuration backup."""

    status: str = Field(description="Status of restore operation")
    stores_written: int = Field(description="Number of stores successfully written")
    stores_total: int = Field(description="Total number of known stores")
    missing_stores: List[str] = Field(default_factory=list, description="Store keys not found in backup")
    restart_scheduled: bool = Field(description="Whether server restart was scheduled")
    message: str = Field(description="Human-readable status message")