export interface HostConfig {
  shortcuts: ShortcutAction[];
  restoreClipboard: boolean;
  clientLog: string | null;
  gameConfig: string | null;
  stashScroll: boolean;
  overlayKey: string;
  logKeys: boolean;
  windowTitle: string;
  language: string;
}

export interface ShortcutAction {
  shortcut: string;
  keepModKeys?: true;
  action:
    | {
        type: "copy-item";
        focusOverlay?: boolean;
        target: string;
      }
    | {
        type: "ocr-text";
        target: "heist-gems";
      }
    | {
        type: "trigger-event";
        target: string;
      }
    | {
        type: "stash-search";
        text: string;
      }
    | {
        type: "toggle-overlay";
      }
    | {
        type: "paste-in-chat";
        text: string;
        send: boolean;
      }
    | {
        type: "test-only";
      };
}

export type UpdateInfo =
  | {
      state: "initial" | "checking-for-update";
    }
  | {
      state: "update-available";
      version: string;
      noDownloadReason: "not-supported" | "disabled-by-flag" | null;
    }
  | {
      state: "update-downloaded";
      version: string;
    }
  | {
      state: "update-not-available" | "error";
      checkedAt: number;
    };

export interface HostState {
  contents: string | null;
  version: string;
  updater: UpdateInfo;
}

export type IpcEvent =
  // events that have meaning only in Overlay mode:
  | IpcOverlayAttached
  | IpcFocusChange
  | IpcVisibility
  | IpcFocusGame
  | IpcHideExclusiveWidget
  | IpcTrackArea
  // events used by any type of Client:
  | IpcSaveConfig
  | IpcUpdaterState
  | IpcGameLog
  | IpcClientIsActive
  | IpcLogEntry
  | IpcHostConfig
  | IpcWidgetAction
  | IpcItemText
  | IpcOcrText
  | IpcConfigChanged
  | IpcUserAction;

export type IpcEventPayload<
  Name extends IpcEvent["name"],
  T extends IpcEvent = IpcEvent
> = T extends { name: Name; payload: infer P } ? P : never;

type IpcOverlayAttached = Event<"MAIN->OVERLAY::overlay-attached">;

type IpcFocusChange = Event<
  "MAIN->OVERLAY::focus-change",
  {
    game: boolean;
    overlay: boolean;
    usingHotkey: boolean;
  }
>;

type IpcVisibility = Event<
  "MAIN->OVERLAY::visibility",
  {
    isVisible: boolean;
  }
>;

type IpcFocusGame = Event<"OVERLAY->MAIN::focus-game">;

type IpcHideExclusiveWidget = Event<"MAIN->OVERLAY::hide-exclusive-widget">;

type IpcTrackArea = Event<
  "OVERLAY->MAIN::track-area",
  {
    holdKey: string;
    closeThreshold: number;
    from: { x: number; y: number };
    area: { x: number; y: number; width: number; height: number };
    dpr: number;
  }
>;

type IpcHostConfig = Event<"CLIENT->MAIN::update-host-config", HostConfig>;

type IpcClientIsActive = Event<
  "CLIENT->MAIN::used-recently",
  {
    isOverlay: boolean;
  }
>;

type IpcSaveConfig = Event<
  "CLIENT->MAIN::save-config",
  {
    contents: string;
    isTemporary: boolean;
  }
>;

type IpcConfigChanged = Event<
  "MAIN->CLIENT::config-changed",
  {
    contents: string;
  }
>;

type IpcLogEntry = Event<
  "MAIN->CLIENT::log-entry",
  {
    message: string;
  }
>;

type IpcWidgetAction = Event<
  "MAIN->CLIENT::widget-action",
  {
    target: string;
  }
>;

type IpcItemText = Event<
  "MAIN->CLIENT::item-text",
  {
    target: string;
    clipboard: string;
    item?: unknown;
    position: { x: number; y: number };
    focusOverlay: boolean;
  }
>;

type IpcOcrText = Event<
  "MAIN->CLIENT::ocr-text",
  {
    target: string;
    pressTime: number;
    ocrTime: number;
    paragraphs: string[];
  }
>;

type IpcGameLog = Event<
  "MAIN->CLIENT::game-log",
  {
    lines: string[];
  }
>;

type IpcUpdaterState = Event<"MAIN->CLIENT::updater-state", UpdateInfo>;

// Hotkeyable actions are defined in `ShortcutAction`.
// Actions below are triggered by user interaction with the UI.
type IpcUserAction = Event<
  "CLIENT->MAIN::user-action",
  | {
      action: "check-for-update" | "update-and-restart" | "quit";
    }
  | {
      action: "stash-search";
      text: string;
    }
>;

interface Event<TName extends string, TPayload = undefined> {
  name: TName;
  payload: TPayload;
}