"use strict";

var {classes: Cc, interfaces: Ci, utils: Cu} = Components;

Cu.import("resource://gre/modules/XPCOMUtils.jsm");

Cu.import("resource://gre/modules/ExtensionUtils.jsm");

XPCOMUtils.defineLazyModuleGetter(this, "AddonManager",
                                  "resource://gre/modules/AddonManager.jsm");
XPCOMUtils.defineLazyModuleGetter(this, "ExtensionManagement",
                                  "resource://gre/modules/ExtensionManagement.jsm");

var {
  EventManager,
  SingletonEventManager,
  ignoreEvent,
} = ExtensionUtils;

XPCOMUtils.defineLazyModuleGetter(this, "NativeApp",
                                  "resource://gre/modules/NativeMessaging.jsm");

extensions.registerSchemaAPI("runtime", "addon_parent", context => {
  let {extension} = context;
  return {
    runtime: {
      onStartup: new EventManager(context, "runtime.onStartup", fire => {
        extension.onStartup = fire;
        return () => {
          extension.onStartup = null;
        };
      }).api(),

      onInstalled: ignoreEvent(context, "runtime.onInstalled"),

      onUpdateAvailable: new SingletonEventManager(context, "runtime.onUpdateAvailable", fire => {
        let instanceID = extension.addonData.instanceID;
        AddonManager.addUpgradeListener(instanceID, upgrade => {
          extension.upgrade = upgrade;
          let details = {
            version: upgrade.version,
          };
          context.runSafe(fire, details);
        });
        return () => {
          AddonManager.removeUpgradeListener(instanceID);
        };
      }).api(),

      reload: () => {
        if (extension.upgrade) {
          // If there is a pending update, install it now.
          extension.upgrade.install();
        } else {
          // Otherwise, reload the current extension.
          AddonManager.getAddonByID(extension.id, addon => {
            addon.reload();
          });
        }
      },

      connectNative(application) {
        let app = new NativeApp(extension, context, application);
        return app.portAPI();
      },

      sendNativeMessage(application, message) {
        let app = new NativeApp(extension, context, application);
        return app.sendMessage(message);
      },

      get lastError() {
        // TODO(robwu): Figure out how to make sure that errors in the parent
        // process are propagated to the child process.
        // lastError should not be accessed from the parent.
        return context.lastError;
      },

      getPlatformInfo: function() {
        return Promise.resolve(ExtensionUtils.PlatformInfo);
      },

      openOptionsPage: function() {
        if (!extension.manifest.options_ui) {
          return Promise.reject({message: "No `options_ui` declared"});
        }

        return openOptionsPage(extension).then(() => {});
      },

      setUninstallURL: function(url) {
        if (url.length == 0) {
          return Promise.resolve();
        }

        let uri;
        try {
          uri = NetUtil.newURI(url);
        } catch (e) {
          return Promise.reject({message: `Invalid URL: ${JSON.stringify(url)}`});
        }

        if (uri.scheme != "http" && uri.scheme != "https") {
          return Promise.reject({message: "url must have the scheme http or https"});
        }

        extension.uninstallURL = url;
        return Promise.resolve();
      },
    },
  };
});