"""Picture target schemas (CRUD, processing state, settings, metrics)."""

from datetime import datetime
from typing import Dict, List, Literal, Optional

from pydantic import BaseModel, Field

from wled_controller.core.processing.processing_settings import DEFAULT_STATE_CHECK_INTERVAL


class ColorCorrection(BaseModel):
    """Color correction settings."""

    gamma: float = Field(default=2.2, description="Gamma correction", ge=0.1, le=5.0)
    saturation: float = Field(default=1.0, description="Saturation multiplier", ge=0.0, le=2.0)
    brightness: float = Field(default=1.0, description="Brightness multiplier", ge=0.0, le=1.0)


class ProcessingSettings(BaseModel):
    """Processing settings for a picture target."""

    display_index: int = Field(default=0, description="Display to capture", ge=0)
    fps: int = Field(default=30, description="Target frames per second", ge=10, le=90)
    interpolation_mode: str = Field(default="average", description="LED color interpolation mode (average, median, dominant)")
    brightness: float = Field(default=1.0, description="Global brightness (0.0-1.0)", ge=0.0, le=1.0)
    smoothing: float = Field(default=0.3, description="Temporal smoothing factor (0.0=none, 1.0=full)", ge=0.0, le=1.0)
    standby_interval: float = Field(default=1.0, description="Seconds between keepalive sends when screen is static (0.5-5.0)", ge=0.5, le=5.0)
    state_check_interval: int = Field(
        default=DEFAULT_STATE_CHECK_INTERVAL, ge=5, le=600,
        description="Seconds between WLED health checks"
    )
    color_correction: Optional[ColorCorrection] = Field(
        default_factory=ColorCorrection,
        description="Color correction settings"
    )


class KeyColorRectangleSchema(BaseModel):
    """A named rectangle for key color extraction (relative coords 0.0-1.0)."""

    name: str = Field(description="Rectangle name", min_length=1, max_length=50)
    x: float = Field(default=0.0, description="Left edge (0.0-1.0)", ge=0.0, le=1.0)
    y: float = Field(default=0.0, description="Top edge (0.0-1.0)", ge=0.0, le=1.0)
    width: float = Field(default=1.0, description="Width (0.0-1.0)", gt=0.0, le=1.0)
    height: float = Field(default=1.0, description="Height (0.0-1.0)", gt=0.0, le=1.0)


class KeyColorsSettingsSchema(BaseModel):
    """Settings for key colors extraction."""

    fps: int = Field(default=10, description="Extraction rate (1-60)", ge=1, le=60)
    interpolation_mode: str = Field(default="average", description="Color mode (average, median, dominant)")
    smoothing: float = Field(default=0.3, description="Temporal smoothing (0.0-1.0)", ge=0.0, le=1.0)
    pattern_template_id: str = Field(default="", description="Pattern template ID for rectangle layout")


class ExtractedColorResponse(BaseModel):
    """A single extracted color."""

    r: int = Field(description="Red (0-255)")
    g: int = Field(description="Green (0-255)")
    b: int = Field(description="Blue (0-255)")
    hex: str = Field(description="Hex color (#rrggbb)")


class KeyColorsResponse(BaseModel):
    """Extracted key colors for a target."""

    target_id: str = Field(description="Target ID")
    colors: Dict[str, ExtractedColorResponse] = Field(description="Rectangle name -> color")
    timestamp: Optional[datetime] = Field(None, description="Extraction timestamp")


class PictureTargetCreate(BaseModel):
    """Request to create a picture target."""

    name: str = Field(description="Target name", min_length=1, max_length=100)
    target_type: str = Field(default="led", description="Target type (led, key_colors)")
    device_id: str = Field(default="", description="LED device ID")
    picture_source_id: str = Field(default="", description="Picture source ID")
    settings: Optional[ProcessingSettings] = Field(None, description="Processing settings (for wled targets)")
    key_colors_settings: Optional[KeyColorsSettingsSchema] = Field(None, description="Key colors settings (for key_colors targets)")
    description: Optional[str] = Field(None, description="Optional description", max_length=500)


class PictureTargetUpdate(BaseModel):
    """Request to update a picture target."""

    name: Optional[str] = Field(None, description="Target name", min_length=1, max_length=100)
    device_id: Optional[str] = Field(None, description="WLED device ID")
    picture_source_id: Optional[str] = Field(None, description="Picture source ID")
    settings: Optional[ProcessingSettings] = Field(None, description="Processing settings (for wled targets)")
    key_colors_settings: Optional[KeyColorsSettingsSchema] = Field(None, description="Key colors settings (for key_colors targets)")
    description: Optional[str] = Field(None, description="Optional description", max_length=500)


class PictureTargetResponse(BaseModel):
    """Picture target response."""

    id: str = Field(description="Target ID")
    name: str = Field(description="Target name")
    target_type: str = Field(description="Target type")
    device_id: str = Field(default="", description="WLED device ID")
    picture_source_id: str = Field(default="", description="Picture source ID")
    settings: Optional[ProcessingSettings] = Field(None, description="Processing settings (wled)")
    key_colors_settings: Optional[KeyColorsSettingsSchema] = Field(None, description="Key colors settings (key_colors)")
    description: Optional[str] = Field(None, description="Description")
    created_at: datetime = Field(description="Creation timestamp")
    updated_at: datetime = Field(description="Last update timestamp")


class PictureTargetListResponse(BaseModel):
    """List of picture targets response."""

    targets: List[PictureTargetResponse] = Field(description="List of picture targets")
    count: int = Field(description="Number of targets")


class TargetProcessingState(BaseModel):
    """Processing state for a picture target."""

    target_id: str = Field(description="Target ID")
    device_id: Optional[str] = Field(None, description="Device ID")
    processing: bool = Field(description="Whether processing is active")
    fps_actual: Optional[float] = Field(None, description="Actual FPS achieved")
    fps_potential: Optional[float] = Field(None, description="Potential FPS (processing speed without throttle)")
    fps_target: int = Field(default=0, description="Target FPS")
    frames_skipped: Optional[int] = Field(None, description="Frames skipped (no screen change)")
    frames_keepalive: Optional[int] = Field(None, description="Keepalive frames sent during standby")
    fps_current: Optional[int] = Field(None, description="Frames sent in the last second")
    timing_extract_ms: Optional[float] = Field(None, description="Border extraction time (ms)")
    timing_map_leds_ms: Optional[float] = Field(None, description="LED mapping time (ms)")
    timing_smooth_ms: Optional[float] = Field(None, description="Smoothing time (ms)")
    timing_send_ms: Optional[float] = Field(None, description="DDP send time (ms)")
    timing_total_ms: Optional[float] = Field(None, description="Total processing time (ms)")
    timing_calc_colors_ms: Optional[float] = Field(None, description="Color calculation time (ms, KC targets)")
    timing_broadcast_ms: Optional[float] = Field(None, description="WebSocket broadcast time (ms, KC targets)")
    display_index: int = Field(default=0, description="Current display index")
    overlay_active: bool = Field(default=False, description="Whether visualization overlay is active")
    last_update: Optional[datetime] = Field(None, description="Last successful update")
    errors: List[str] = Field(default_factory=list, description="Recent errors")
    device_online: bool = Field(default=False, description="Whether device is reachable")
    device_latency_ms: Optional[float] = Field(None, description="Health check latency in ms")
    device_name: Optional[str] = Field(None, description="Device name reported by firmware")
    device_version: Optional[str] = Field(None, description="Firmware version")
    device_led_count: Optional[int] = Field(None, description="LED count reported by device")
    device_rgbw: Optional[bool] = Field(None, description="Whether device uses RGBW LEDs")
    device_led_type: Optional[str] = Field(None, description="LED chip type (e.g. WS2812B, SK6812 RGBW)")
    device_fps: Optional[int] = Field(None, description="Device-reported FPS (WLED internal refresh rate)")
    device_last_checked: Optional[datetime] = Field(None, description="Last health check time")
    device_error: Optional[str] = Field(None, description="Last health check error")


class TargetMetricsResponse(BaseModel):
    """Target metrics response."""

    target_id: str = Field(description="Target ID")
    device_id: Optional[str] = Field(None, description="Device ID")
    processing: bool = Field(description="Whether processing is active")
    fps_actual: Optional[float] = Field(None, description="Actual FPS")
    fps_target: int = Field(description="Target FPS")
    uptime_seconds: float = Field(description="Processing uptime in seconds")
    frames_processed: int = Field(description="Total frames processed")
    errors_count: int = Field(description="Total error count")
    last_error: Optional[str] = Field(None, description="Last error message")
    last_update: Optional[datetime] = Field(None, description="Last update timestamp")


class KCTestRectangleResponse(BaseModel):
    """A rectangle with its extracted color from a KC test."""

    name: str = Field(description="Rectangle name")
    x: float = Field(description="Left edge (0.0-1.0)")
    y: float = Field(description="Top edge (0.0-1.0)")
    width: float = Field(description="Width (0.0-1.0)")
    height: float = Field(description="Height (0.0-1.0)")
    color: ExtractedColorResponse = Field(description="Extracted color for this rectangle")


class KCTestResponse(BaseModel):
    """Response from testing a KC target."""

    image: str = Field(description="Base64 data URI of the captured frame")
    rectangles: List[KCTestRectangleResponse] = Field(description="Rectangles with extracted colors")
    interpolation_mode: str = Field(description="Color extraction mode used")
    pattern_template_name: str = Field(description="Pattern template name")