import {
  ArrowDown,
  ArrowUp,
  BatteryCharging,
  Bed,
  Check,
  CircleCheck,
  CircleHelp,
  CloudDrizzle,
  CloudFog,
  CloudLightning,
  CloudRain,
  CloudSnow,
  Cloudy,
  DoorOpen,
  Droplets,
  Fan,
  Flame,
  House,
  Lightbulb,
  type LucideIcon,
  Moon,
  Music,
  Plug,
  Snowflake,
  Sun,
  SunSnow,
  Thermometer,
  ThermometerSun,
  TriangleAlert,
  Umbrella,
  Volume2,
  VolumeX,
  Wind,
  Zap,
} from "lucide-react"

/**
 * The icons a tile may be drawn with, by name.
 *
 * Curated rather than lucide's `dynamicIconImports`: the panel has to offer
 * these in a list, and the dynamic map makes the bundler emit a lazy chunk per
 * icon — some fifteen hundred of them — so a wall panel would fetch one request
 * per tile over its LAN before it could draw anything. A few dozen weather,
 * room and status glyphs cover what a dashboard says, and the map is cheap to
 * extend.
 */
export const ICONS: Record<string, LucideIcon> = {
  sun: Sun,
  moon: Moon,
  cloudy: Cloudy,
  "cloud-rain": CloudRain,
  "cloud-drizzle": CloudDrizzle,
  "cloud-snow": CloudSnow,
  "cloud-lightning": CloudLightning,
  "cloud-fog": CloudFog,
  wind: Wind,
  umbrella: Umbrella,
  snowflake: Snowflake,
  droplets: Droplets,
  thermometer: Thermometer,
  "thermometer-sun": ThermometerSun,
  flame: Flame,
  fan: Fan,
  "sun-snow": SunSnow,
  "door-open": DoorOpen,
  house: House,
  bed: Bed,
  lightbulb: Lightbulb,
  plug: Plug,
  music: Music,
  "volume-2": Volume2,
  "volume-x": VolumeX,
  zap: Zap,
  "battery-charging": BatteryCharging,
  "arrow-up": ArrowUp,
  "arrow-down": ArrowDown,
  "triangle-alert": TriangleAlert,
  check: Check,
  "circle-check": CircleCheck,
}

export const ICON_NAMES = Object.keys(ICONS)

/**
 * A tile's glyph, or the neutral placeholder for a name nothing maps to.
 *
 * A flow author names an icon by guess as often as by picking one from the
 * panel, so a name outside {@link ICONS} is a typo, not "no icon" — unlike an
 * empty name, which stays undrawn rather than warning. The warning is what
 * makes the typo findable; the placeholder is what makes it visible.
 */
export function resolveIcon(name: string): LucideIcon | null {
  if (!name) return null
  const icon = ICONS[name]
  if (icon) return icon
  warnOnce(
    `Dashboard: unknown icon "${name}", expected one of: ${ICON_NAMES.join(", ")}`,
  )
  return CircleHelp
}

/**
 * Two letters off a title, so a rail of four reads as four different things.
 *
 * The fallback wherever a glyph is drawn from a name that may be empty: the
 * rail in all three looks, and the panels dialog showing what the rail will
 * draw.
 */
export function initials(label: string): string {
  const words = label.split(/[\s_-]+/).filter(Boolean)
  if (words.length === 0) return "?"
  if (words.length === 1) return words[0].slice(0, 2).toUpperCase()
  return (words[0][0] + words[1][0]).toUpperCase()
}

/**
 * What an icon may be tinted, by name.
 *
 * Literal classes so Tailwind's scanner sees them. No terracotta: that is the
 * one affordance a view gets, and a panel is many tiles.
 */
export const ICON_COLORS: Record<string, string> = {
  default: "text-foreground",
  muted: "text-muted-foreground",
  primary: "text-primary",
  success: "text-status-success",
  danger: "text-destructive",
}

/** A tile's tint, or the widget's own default for a name nothing maps to. */
export function resolveIconColor(name: string): string {
  const color = ICON_COLORS[name]
  if (color) return color
  if (name) {
    warnOnce(
      `Dashboard: unknown icon color "${name}", expected one of: ${Object.keys(ICON_COLORS).join(", ")}`,
    )
  }
  return ICON_COLORS.default
}

/**
 * Both lookups sit in a render, and a bound widget renders as often as its
 * value arrives — so a typo would otherwise be a warning a second, for as long
 * as the panel is open.
 */
const warned = new Set<string>()

function warnOnce(message: string) {
  if (warned.has(message)) return
  warned.add(message)
  console.warn(message)
}