/* Copyright 2023 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

export class SandboxSupportBase {
  constructor(win) {
    this.win = win;
    this.timeoutIds = new Map();
    this.commFun = null;
  }
  destroy() {
    this.commFun = null;
    for (const id of this.timeoutIds.values()) {
      this.win.clearTimeout(id);
    }
    this.timeoutIds = null;
  }
  exportValueToSandbox(val) {
    throw new Error("Not implemented");
  }
  importValueFromSandbox(val) {
    throw new Error("Not implemented");
  }
  createErrorForSandbox(errorMessage) {
    throw new Error("Not implemented");
  }
  callSandboxFunction(name, args) {
    try {
      args = this.exportValueToSandbox(args);
      this.commFun(name, args);
    } catch (e) {
      this.win.console.error(e);
    }
  }
  createSandboxExternals() {
    const externals = {
      setTimeout: (callbackId, nMilliseconds) => {
        if (typeof callbackId !== "number" || typeof nMilliseconds !== "number") {
          return;
        }
        if (callbackId === 0) {
          this.win.clearTimeout(this.timeoutIds.get(callbackId));
        }
        const id = this.win.setTimeout(() => {
          this.timeoutIds.delete(callbackId);
          this.callSandboxFunction("timeoutCb", {
            callbackId,
            interval: false
          });
        }, nMilliseconds);
        this.timeoutIds.set(callbackId, id);
      },
      clearTimeout: callbackId => {
        this.win.clearTimeout(this.timeoutIds.get(callbackId));
        this.timeoutIds.delete(callbackId);
      },
      setInterval: (callbackId, nMilliseconds) => {
        if (typeof callbackId !== "number" || typeof nMilliseconds !== "number") {
          return;
        }
        const id = this.win.setInterval(() => {
          this.callSandboxFunction("timeoutCb", {
            callbackId,
            interval: true
          });
        }, nMilliseconds);
        this.timeoutIds.set(callbackId, id);
      },
      clearInterval: callbackId => {
        this.win.clearInterval(this.timeoutIds.get(callbackId));
        this.timeoutIds.delete(callbackId);
      },
      alert: cMsg => {
        if (typeof cMsg !== "string") {
          return;
        }
        this.win.alert(cMsg);
      },
      confirm: cMsg => {
        if (typeof cMsg !== "string") {
          return false;
        }
        return this.win.confirm(cMsg);
      },
      prompt: (cQuestion, cDefault) => {
        if (typeof cQuestion !== "string" || typeof cDefault !== "string") {
          return null;
        }
        return this.win.prompt(cQuestion, cDefault);
      },
      parseURL: cUrl => {
        const url = new this.win.URL(cUrl);
        const props = ["hash", "host", "hostname", "href", "origin", "password", "pathname", "port", "protocol", "search", "searchParams", "username"];
        return Object.fromEntries(props.map(name => [name, url[name].toString()]));
      },
      send: data => {
        if (!data) {
          return;
        }
        const event = new this.win.CustomEvent("updatefromsandbox", {
          detail: this.importValueFromSandbox(data)
        });
        this.win.dispatchEvent(event);
      }
    };
    Object.setPrototypeOf(externals, null);
    return (name, args) => {
      try {
        const result = externals[name](...args);
        return this.exportValueToSandbox(result);
      } catch (error) {
        throw this.createErrorForSandbox(error?.toString() ?? "");
      }
    };
  }
}