import { localState } from "$lib/helpers/localState.svelte";
import type { NodeInput } from "@nodes/types";
import type { SettingsType } from ".";

const themes = [
  "dark",
  "light",
  "catppuccin",
  "solarized",
  "high-contrast",
  "nord",
  "dracula",
];

export const AppSettingTypes = {
  theme: {
    type: "select",
    options: themes,
    label: "Theme",
    value: themes[0],
  },
  showGrid: {
    type: "boolean",
    label: "Show Grid",
    value: true,
  },
  centerCamera: {
    type: "boolean",
    label: "Center Camera",
    value: true,
  },
  nodeInterface: {
    title: "Node Interface",
    showNodeGrid: {
      type: "boolean",
      label: "Show Grid",
      value: true,
    },
    snapToGrid: {
      type: "boolean",
      label: "Snap to Grid",
      value: true,
    },
    showHelp: {
      type: "boolean",
      label: "Show Help",
      value: false,
    },
  },
  debug: {
    title: "Debug",
    amount: {
      type: "number",
      label: "Amount",
      value: 4,
    },
    wireframe: {
      type: "boolean",
      label: "Wireframe",
      value: false,
    },
    useWorker: {
      type: "boolean",
      label: "Execute runtime in worker",
      value: true,
    },
    showIndices: {
      type: "boolean",
      label: "Show Indices",
      value: false,
    },
    showPerformancePanel: {
      type: "boolean",
      label: "Show Performance Panel",
      value: false,
    },
    showBenchmarkPanel: {
      type: "boolean",
      label: "Show Benchmark Panel",
      value: false,
    },
    showVertices: {
      type: "boolean",
      label: "Show Vertices",
      value: false,
    },
    showStemLines: {
      type: "boolean",
      label: "Show Stem Lines",
      value: false,
    },
    stressTest: {
      title: "Stress Test",
      amount: {
        type: "integer",
        min: 2,
        max: 15,
        value: 4,
      },
      loadGrid: {
        type: "button",
        label: "Load Grid",
      },
      loadTree: {
        type: "button",
        label: "Load Tree",
      },
      lottaFaces: {
        type: "button",
        label: "Load 'lots of faces'",
      },
      lottaNodes: {
        type: "button",
        label: "Load 'lots of nodes'",
      },
      lottaNodesAndFaces: {
        type: "button",
        label: "Load 'lots of nodes and faces'",
      },
    },
  },
} as const satisfies SettingsType;

type IsInputDefinition<T> = T extends NodeInput ? T : never;
type HasTitle = { title: string };

type Widen<T> = T extends boolean
  ? boolean
  : T extends number
    ? number
    : T extends string
      ? string
      : T;

type ExtractSettingsValues<T> = {
  -readonly [K in keyof T]: T[K] extends HasTitle
    ? ExtractSettingsValues<Omit<T[K], "title">>
    : T[K] extends IsInputDefinition<T[K]>
      ? T[K] extends { value: infer V }
        ? Widen<V>
        : never
      : T[K] extends Record<string, any>
        ? ExtractSettingsValues<T[K]>
        : never;
};

function settingsToStore<T>(settings: T): ExtractSettingsValues<T> {
  const result = {} as any;
  for (const key in settings) {
    const value = settings[key];
    if (value && typeof value === "object") {
      if ("value" in value) {
        result[key] = value.value;
      } else {
        result[key] = settingsToStore(value);
      }
    }
  }
  return result;
}

export let appSettings = localState(
  "app-settings",
  settingsToStore(AppSettingTypes),
);

$effect.root(() => {
  $effect(() => {
    const theme = appSettings.theme;
    const classes = document.documentElement.classList;
    const newClassName = `theme-${theme}`;
    if (classes) {
      for (const className of classes) {
        if (className.startsWith("theme-") && className !== newClassName) {
          classes.remove(className);
        }
      }
    }
    document.documentElement.classList.add(newClassName);
  });
});