import type { ComponentType } from 'react';

/**
 * Supported widget types for the dashboard.
 * clock/search/calendar/note: implemented in previous plans.
 * calculator/favorites/stopwatch: Phase 8 additions (der fruehere
 * Einzel-Schnellzugriffs-Typ wurde in quick-260916-iex entfernt — Favoriten
 * decken den Fall ab).
 */
export type WidgetType =
  | 'clock'
  | 'search'
  | 'calendar'
  | 'note'
  | 'calculator'
  | 'favorites'
  | 'stopwatch';

/**
 * Props contract that every widget component must accept.
 */
export interface WidgetProps {
  instanceId: string;
  config: Record<string, unknown>;
  isEditMode: boolean;
}

/**
 * Per-type size constraints for the react-grid-layout grid.
 * Values from UI-SPEC size table (D-06) and Phase-8 Grid-Constraints (D-01).
 */
export const WIDGET_CONSTRAINTS: Record<
  WidgetType,
  { minW: number; minH: number; defaultW: number; defaultH: number }
> = {
  // quick-260916-dyv: minW/minH = kleinste noch bedienbare Kachel je Typ im
  // 24-Spalten/20-px-Raster, aus dem Innenaufbau gerechnet (Suche: Auswahl 120 +
  // Eingabe + Knopf; Rechner: Anzeige 40 + Speicherzeile 28 + 5 Tastenreihen 28 =
  // 268 px -> 10 Zeilen; Stoppuhr: kompakte Bedienleiste). defaultW/defaultH =
  // altes 12-Spalten-Mass x2, unveraendert. Gespeicherte minW/minH werden in
  // dashboard-grid.tsx aus dieser Tabelle ueberschrieben.
  // Existing widgets
  clock: { minW: 2, minH: 2, defaultW: 4, defaultH: 4 },
  search: { minW: 6, minH: 2, defaultW: 12, defaultH: 4 },
  // quick-260916-htc: Monatsraster braucht Breite fuer 7 Spalten und Hoehe
  // fuer Nav-Zeile + Wochentagskopf + 6 Rasterzeilen + Naechste-Termine-Block.
  calendar: { minW: 6, minH: 8, defaultW: 8, defaultH: 12 },
  note: { minW: 4, minH: 4, defaultW: 6, defaultH: 8 },
  // Phase 8 new widgets (D-01)
  // minH 10, nicht 9 (260916-dyv, Browser-Messung des Orchestrators): der Rechner hat
  // SECHS Tastenreihen (%/CE/C/Loeschen, 1/x/x2/Wurzel/Division, 7-9, 4-6, 1-3, 0/Komma/=),
  // Inhalt 268 px; bei 9 Zeilen (244 px) fehlte die unterste Reihe um 25 px.
  calculator: { minW: 3, minH: 10, defaultW: 6, defaultH: 10 },
  favorites: { minW: 3, minH: 3, defaultW: 6, defaultH: 10 },
  stopwatch: { minW: 4, minH: 3, defaultW: 6, defaultH: 6 },
};

/**
 * Definition for a widget type in the catalog.
 */
export interface WidgetDefinition {
  type: WidgetType;
  nameKey: string;
  descriptionKey: string;
  /** Inline SVG icon as React component */
  icon: ComponentType<{ className?: string }>;
  minW: number;
  minH: number;
  defaultW: number;
  defaultH: number;
  /** Lazy-loaded widget component */
  component: ComponentType<WidgetProps>;
}

/**
 * Placeholder widget for types not yet implemented.
 * Renders the widget type name as a centered label.
 */
function PlaceholderWidget({ config }: WidgetProps) {
  const label = (config as Record<string, string>).__widgetType ?? 'Widget';
  return (
    <div className="flex h-full items-center justify-center text-muted-foreground text-sm">
      {label}
    </div>
  );
}

// --- Icon components (inline SVG, established project pattern) ---

function ClockIcon({ className }: { className?: string }) {
  return (
    <svg
      xmlns="http://www.w3.org/2000/svg"
      width="24"
      height="24"
      viewBox="0 0 24 24"
      fill="none"
      stroke="currentColor"
      strokeWidth="2"
      strokeLinecap="round"
      strokeLinejoin="round"
      className={className}
    >
      <circle cx="12" cy="12" r="10" />
      <polyline points="12 6 12 12 16 14" />
    </svg>
  );
}

function SearchIcon({ className }: { className?: string }) {
  return (
    <svg
      xmlns="http://www.w3.org/2000/svg"
      width="24"
      height="24"
      viewBox="0 0 24 24"
      fill="none"
      stroke="currentColor"
      strokeWidth="2"
      strokeLinecap="round"
      strokeLinejoin="round"
      className={className}
    >
      <circle cx="11" cy="11" r="8" />
      <line x1="21" y1="21" x2="16.65" y2="16.65" />
    </svg>
  );
}

function CalendarIcon({ className }: { className?: string }) {
  return (
    <svg
      xmlns="http://www.w3.org/2000/svg"
      width="24"
      height="24"
      viewBox="0 0 24 24"
      fill="none"
      stroke="currentColor"
      strokeWidth="2"
      strokeLinecap="round"
      strokeLinejoin="round"
      className={className}
    >
      <rect x="3" y="4" width="18" height="18" rx="2" ry="2" />
      <line x1="16" y1="2" x2="16" y2="6" />
      <line x1="8" y1="2" x2="8" y2="6" />
      <line x1="3" y1="10" x2="21" y2="10" />
    </svg>
  );
}

function NoteIcon({ className }: { className?: string }) {
  return (
    <svg
      xmlns="http://www.w3.org/2000/svg"
      width="24"
      height="24"
      viewBox="0 0 24 24"
      fill="none"
      stroke="currentColor"
      strokeWidth="2"
      strokeLinecap="round"
      strokeLinejoin="round"
      className={className}
    >
      <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z" />
      <polyline points="14 2 14 8 20 8" />
      <line x1="16" y1="13" x2="8" y2="13" />
      <line x1="16" y1="17" x2="8" y2="17" />
      <polyline points="10 9 9 9 8 9" />
    </svg>
  );
}

function CalculatorIcon({ className }: { className?: string }) {
  return (
    <svg
      xmlns="http://www.w3.org/2000/svg"
      width="24"
      height="24"
      viewBox="0 0 24 24"
      fill="none"
      stroke="currentColor"
      strokeWidth="2"
      strokeLinecap="round"
      strokeLinejoin="round"
      className={className}
    >
      <rect x="4" y="2" width="16" height="20" rx="2" />
      <line x1="8" y1="6" x2="16" y2="6" />
      <line x1="8" y1="10" x2="8" y2="10" />
      <line x1="12" y1="10" x2="12" y2="10" />
      <line x1="16" y1="10" x2="16" y2="10" />
      <line x1="8" y1="14" x2="8" y2="14" />
      <line x1="12" y1="14" x2="12" y2="14" />
      <line x1="16" y1="14" x2="16" y2="18" />
      <line x1="8" y1="18" x2="8" y2="18" />
      <line x1="12" y1="18" x2="12" y2="18" />
    </svg>
  );
}

function FavoritesIcon({ className }: { className?: string }) {
  return (
    <svg
      xmlns="http://www.w3.org/2000/svg"
      width="24"
      height="24"
      viewBox="0 0 24 24"
      fill="none"
      stroke="currentColor"
      strokeWidth="2"
      strokeLinecap="round"
      strokeLinejoin="round"
      className={className}
    >
      <polygon points="12 2 15.09 8.26 22 9.27 17 14.14 18.18 21.02 12 17.77 5.82 21.02 7 14.14 2 9.27 8.91 8.26 12 2" />
    </svg>
  );
}

function StopwatchIcon({ className }: { className?: string }) {
  return (
    <svg
      xmlns="http://www.w3.org/2000/svg"
      width="24"
      height="24"
      viewBox="0 0 24 24"
      fill="none"
      stroke="currentColor"
      strokeWidth="2"
      strokeLinecap="round"
      strokeLinejoin="round"
      className={className}
    >
      <circle cx="12" cy="13" r="8" />
      <polyline points="12 9 12 13 14 15" />
      <line x1="9" y1="2" x2="15" y2="2" />
      <line x1="12" y1="2" x2="12" y2="4" />
    </svg>
  );
}

/**
 * Registry of all widget types. Used by the widget catalog modal
 * and the grid renderer to look up components and constraints.
 */
export const WIDGET_REGISTRY: Record<WidgetType, WidgetDefinition> = {
  clock: {
    type: 'clock',
    nameKey: 'clock.name',
    descriptionKey: 'clock.description',
    icon: ClockIcon,
    ...WIDGET_CONSTRAINTS.clock,
    component: PlaceholderWidget, // Replaced via wireClockWidget()
  },
  search: {
    type: 'search',
    nameKey: 'search.name',
    descriptionKey: 'search.description',
    icon: SearchIcon,
    ...WIDGET_CONSTRAINTS.search,
    component: PlaceholderWidget, // Replaced via wireSearchWidget()
  },
  calendar: {
    type: 'calendar',
    nameKey: 'calendar.name',
    descriptionKey: 'calendar.description',
    icon: CalendarIcon,
    ...WIDGET_CONSTRAINTS.calendar,
    component: PlaceholderWidget, // Replaced via wireCalendarWidget()
  },
  note: {
    type: 'note',
    nameKey: 'note.name',
    descriptionKey: 'note.description',
    icon: NoteIcon,
    ...WIDGET_CONSTRAINTS.note,
    component: PlaceholderWidget, // Replaced via wireNoteWidget()
  },
  calculator: {
    type: 'calculator',
    nameKey: 'calculator.name',
    descriptionKey: 'calculator.description',
    icon: CalculatorIcon,
    ...WIDGET_CONSTRAINTS.calculator,
    component: PlaceholderWidget, // Replaced via wireCalculatorWidget()
  },
  favorites: {
    type: 'favorites',
    nameKey: 'favorites.name',
    descriptionKey: 'favorites.description',
    icon: FavoritesIcon,
    ...WIDGET_CONSTRAINTS.favorites,
    component: PlaceholderWidget, // Replaced via wireFavoritesWidget()
  },
  stopwatch: {
    type: 'stopwatch',
    nameKey: 'stopwatch.name',
    descriptionKey: 'stopwatch.description',
    icon: StopwatchIcon,
    ...WIDGET_CONSTRAINTS.stopwatch,
    component: PlaceholderWidget, // Replaced via wireStopwatchWidget()
  },
};

// Wire actual widget components lazily to avoid circular deps
// (imports are deferred so widget-registry can be imported by tests without
// pulling in the entire React tree)

let clockWired = false;
export function wireClockWidget(component: ComponentType<WidgetProps>) {
  if (!clockWired) {
    WIDGET_REGISTRY.clock.component = component;
    clockWired = true;
  }
}

let searchWired = false;
export function wireSearchWidget(component: ComponentType<WidgetProps>) {
  if (!searchWired) {
    WIDGET_REGISTRY.search.component = component;
    searchWired = true;
  }
}

let calendarWired = false;
export function wireCalendarWidget(component: ComponentType<WidgetProps>) {
  if (!calendarWired) {
    WIDGET_REGISTRY.calendar.component = component;
    calendarWired = true;
  }
}

let noteWired = false;
export function wireNoteWidget(component: ComponentType<WidgetProps>) {
  if (!noteWired) {
    WIDGET_REGISTRY.note.component = component;
    noteWired = true;
  }
}

let calculatorWired = false;
export function wireCalculatorWidget(component: ComponentType<WidgetProps>) {
  if (!calculatorWired) {
    WIDGET_REGISTRY.calculator.component = component;
    calculatorWired = true;
  }
}

let favoritesWired = false;
export function wireFavoritesWidget(component: ComponentType<WidgetProps>) {
  if (!favoritesWired) {
    WIDGET_REGISTRY.favorites.component = component;
    favoritesWired = true;
  }
}

let stopwatchWired = false;
export function wireStopwatchWidget(component: ComponentType<WidgetProps>) {
  if (!stopwatchWired) {
    WIDGET_REGISTRY.stopwatch.component = component;
    stopwatchWired = true;
  }
}