import { atom } from "jotai";
import { jotaiStore } from "../packages/excalidraw/jotai";
import { StorageType } from "./components/StorageSettingsDialog";

export type User = {
  id: number;
  githubId: number;
  login: string;
  name: string;
  avatarUrl: string;
};

export const userAtom = atom<User | null>(null);

const baseCurrentCanvasIdAtom = atom<string | null>(
  localStorage.getItem("excalidraw-current-canvas-id"),
);

export const currentCanvasIdAtom = atom(
  (get) => get(baseCurrentCanvasIdAtom),
  (get, set, newId: string | null) => {
    set(baseCurrentCanvasIdAtom, newId);
    if (newId) {
      localStorage.setItem("excalidraw-current-canvas-id", newId);
    } else {
      localStorage.removeItem("excalidraw-current-canvas-id");
    }
  },
);

// Storage Configuration
// -----------------------------------------------------------------------------

interface StorageConfig {
  type: StorageType;
  // Cloudflare KV
  kvUrl?: string;
  kvApiToken?: string;
  // AWS S3
  s3AccessKeyId?: string;
  s3SecretAccessKey?: string;
  s3Region?: string;
  s3BucketName?: string;
}

const STORAGE_CONFIG_LOCAL_STORAGE_KEY = "excalidraw-storage-config-type";
const STORAGE_CONFIG_SESSION_STORAGE_KEY =
  "excalidraw-storage-config-credentials";

const getInitialStorageConfig = (): StorageConfig => {
  const defaultConfig: StorageConfig = { type: "default" };

  try {
    const nonSensitive = localStorage.getItem(STORAGE_CONFIG_LOCAL_STORAGE_KEY);
    const sensitive = sessionStorage.getItem(
      STORAGE_CONFIG_SESSION_STORAGE_KEY,
    );

    const nonSensitiveConfig = nonSensitive ? JSON.parse(nonSensitive) : {};
    const sensitiveConfig = sensitive ? JSON.parse(sensitive) : {};

    return { ...defaultConfig, ...nonSensitiveConfig, ...sensitiveConfig };
  } catch (e) {
    console.error("Failed to load storage config", e);
    return defaultConfig;
  }
};

const baseStorageConfigAtom = atom<StorageConfig>(getInitialStorageConfig());

export const storageConfigAtom = atom(
  (get) => get(baseStorageConfigAtom),
  (get, set, newConfig: StorageConfig) => {
    const {
      type,
      kvUrl,
      kvApiToken,
      s3AccessKeyId,
      s3SecretAccessKey,
      s3Region,
      s3BucketName,
    } = newConfig;

    const nonSensitive = { type };
    const sensitive = {
      kvUrl,
      kvApiToken,
      s3AccessKeyId,
      s3SecretAccessKey,
      s3Region,
      s3BucketName,
    };

    try {
      localStorage.setItem(
        STORAGE_CONFIG_LOCAL_STORAGE_KEY,
        JSON.stringify(nonSensitive),
      );
      sessionStorage.setItem(
        STORAGE_CONFIG_SESSION_STORAGE_KEY,
        JSON.stringify(sensitive),
      );
    } catch (e) {
      console.error("Failed to save storage config", e);
    }

    set(baseStorageConfigAtom, newConfig);
  },
);

// Dialog States
// -----------------------------------------------------------------------------
export const createCanvasDialogAtom = atom({ isOpen: false });

export const renameCanvasDialogAtom = atom<{
  isOpen: boolean;
  canvasId: string | null;
  currentName: string | null;
}>({
  isOpen: false,
  canvasId: null,
  currentName: null,
});

export const saveAsDialogAtom = atom({ isOpen: false });

export const appJotaiStore = jotaiStore;