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

var {
  SingletonEventManager,
} = ExtensionUtils;

extensions.registerSchemaAPI("runtime", "addon_parent", context => {
  let {extension} = context;
  return {
    runtime: {
      onStartup: new SingletonEventManager(context, "runtime.onStartup", fire => {
        if (context.incognito) {
          // This event should not fire if we are operating in a private profile.
          return () => {};
        }
        let listener = () => {
          if (extension.startupReason === "APP_STARTUP") {
            fire();
          }
        };
        extension.on("startup", listener);
        return () => {
          extension.off("startup", listener);
        };
      }).api(),

      onInstalled: new SingletonEventManager(context, "runtime.onInstalled", fire => {
        let listener = () => {
          switch (extension.startupReason) {
            case "APP_STARTUP":
              if (Extension.browserUpdated) {
                fire({reason: "browser_update"});
              }
              break;
            case "ADDON_INSTALL":
              fire({reason: "install"});
              break;
            case "ADDON_UPGRADE":
              fire({reason: "update"});
              break;
          }
        };
        extension.on("startup", listener);
        return () => {
          extension.off("startup", listener);
        };
      }).api(),

      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();
          });
        }
      },

      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;
      },

      getBrowserInfo: function() {
        const {name, vendor, version, appBuildID} = Services.appinfo;
        const info = {name, vendor, version, buildID: appBuildID};
        return Promise.resolve(info);
      },

      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();
      },
    },
  };
});