import {
  mergeContents,
  MergeResults,
} from "@expo/config-plugins/build/utils/generateCode";
import {
  type ConfigPlugin,
  createRunOncePlugin,
  withAppDelegate,
  withInfoPlist,
  withEntitlementsPlist,
} from "expo/config-plugins";

/**
 * Apply react-native-siri-shortcut configuration for Expo SDK 44 projects.
 */
const withReactNativeSiriShortcut: ConfigPlugin<void | string[]> = (
  config,
  activityTypes,
) => {
  withSiriShortcutAppDelegate(config);
  withSiriEntitlements(config);

  const items = activityTypes || [];

  if (!Array.isArray(items) || !items.length) {
    return config;
  }

  withInfoPlist(config, (config) => {
    config.modResults.NSUserActivityTypes = items;
    return config;
  });

  return config;
};

export function addSiriShortcutAppDelegateImport(src: string): MergeResults {
  return mergeContents({
    tag: "react-native-siri-shortcut",
    src,
    newSrc: "#import <RNSiriShortcuts/RNSiriShortcuts.h>",
    anchor: /#import "AppDelegate\.h"/,
    offset: 1,
    comment: "//",
  });
}

export function addSiriShortcutAppDelegateInit(src: string): MergeResults {
  return mergeContents({
    tag: "react-native-siri-shortcut-delegate",
    src,
    newSrc:
      "  [RNSSSiriShortcuts application:application continueUserActivity:userActivity restorationHandler:restorationHandler];",
    anchor:
      /  return \[super application:application continueUserActivity:userActivity restorationHandler:restorationHandler\] \|\| result;/,
    offset: -1,
    comment: "//",
  });
}

/** Append the siri entitlement on iOS */
const withSiriEntitlements: ConfigPlugin = (config) => {
  return withEntitlementsPlist(config, (config) => {
    config.modResults["com.apple.developer.siri"] = true;
    return config;
  });
};

const withSiriShortcutAppDelegate: ConfigPlugin = (config) => {
  return withAppDelegate(config, (config) => {
    if (["objc", "objcpp"].includes(config.modResults.language)) {
      try {
        config.modResults.contents = addSiriShortcutAppDelegateImport(
          config.modResults.contents,
        ).contents;
        config.modResults.contents = addSiriShortcutAppDelegateInit(
          config.modResults.contents,
        ).contents;
      } catch (error: any) {
        if (error.code === "ERR_NO_MATCH") {
          throw new Error(
            `Cannot add Siri Shortcut to the project's AppDelegate because it's malformed. Please report this with a copy of your project AppDelegate.`,
          );
        }
        throw error;
      }
    } else {
      throw new Error(
        "Cannot setup Siri Shortcut because the AppDelegate is not Objective C",
      );
    }
    return config;
  });
};

const pkg = {
  // Prevent this plugin from being run more than once.
  // This pattern enables users to safely migrate off of this
  // out-of-tree `@config-plugins/react-native-siri-shortcut` to a future
  // upstream plugin in `react-native-siri-shortcut`
  name: "react-native-siri-shortcut",
  // Indicates that this plugin is dangerously linked to a module,
  // and might not work with the latest version of that module.
  version: "UNVERSIONED",
};

export default createRunOncePlugin(
  withReactNativeSiriShortcut,
  pkg.name,
  pkg.version,
);