"use strict";

const conversions = require("webidl-conversions");
const utils = require("./utils.js");

const impl = utils.implSymbol;

function Storage() {
  throw new TypeError("Illegal constructor");
}

Object.defineProperty(Storage, "prototype", {
  value: Storage.prototype,
  writable: false,
  enumerable: false,
  configurable: false
});

Storage.prototype.key = function key(index) {
  if (!this || !module.exports.is(this)) {
    throw new TypeError("Illegal invocation");
  }

  if (arguments.length < 1) {
    throw new TypeError(
      "Failed to execute 'key' on 'Storage': 1 argument required, but only " + arguments.length + " present."
    );
  }
  const args = [];
  {
    let curArg = arguments[0];
    curArg = conversions["unsigned long"](curArg, { context: "Failed to execute 'key' on 'Storage': parameter 1" });
    args.push(curArg);
  }
  return this[impl].key(...args);
};

Storage.prototype.getItem = function getItem(key) {
  if (!this || !module.exports.is(this)) {
    throw new TypeError("Illegal invocation");
  }

  if (arguments.length < 1) {
    throw new TypeError(
      "Failed to execute 'getItem' on 'Storage': 1 argument required, but only " + arguments.length + " present."
    );
  }
  const args = [];
  {
    let curArg = arguments[0];
    curArg = conversions["DOMString"](curArg, { context: "Failed to execute 'getItem' on 'Storage': parameter 1" });
    args.push(curArg);
  }
  return this[impl].getItem(...args);
};

Storage.prototype.setItem = function setItem(key, value) {
  if (!this || !module.exports.is(this)) {
    throw new TypeError("Illegal invocation");
  }

  if (arguments.length < 2) {
    throw new TypeError(
      "Failed to execute 'setItem' on 'Storage': 2 arguments required, but only " + arguments.length + " present."
    );
  }
  const args = [];
  {
    let curArg = arguments[0];
    curArg = conversions["DOMString"](curArg, { context: "Failed to execute 'setItem' on 'Storage': parameter 1" });
    args.push(curArg);
  }
  {
    let curArg = arguments[1];
    curArg = conversions["DOMString"](curArg, { context: "Failed to execute 'setItem' on 'Storage': parameter 2" });
    args.push(curArg);
  }
  return this[impl].setItem(...args);
};

Storage.prototype.removeItem = function removeItem(key) {
  if (!this || !module.exports.is(this)) {
    throw new TypeError("Illegal invocation");
  }

  if (arguments.length < 1) {
    throw new TypeError(
      "Failed to execute 'removeItem' on 'Storage': 1 argument required, but only " + arguments.length + " present."
    );
  }
  const args = [];
  {
    let curArg = arguments[0];
    curArg = conversions["DOMString"](curArg, { context: "Failed to execute 'removeItem' on 'Storage': parameter 1" });
    args.push(curArg);
  }
  return this[impl].removeItem(...args);
};

Storage.prototype.clear = function clear() {
  if (!this || !module.exports.is(this)) {
    throw new TypeError("Illegal invocation");
  }

  return this[impl].clear();
};

Object.defineProperty(Storage.prototype, "length", {
  get() {
    if (!this || !module.exports.is(this)) {
      throw new TypeError("Illegal invocation");
    }

    return this[impl]["length"];
  },

  enumerable: true,
  configurable: true
});

Object.defineProperty(Storage.prototype, Symbol.toStringTag, {
  value: "Storage",
  writable: false,
  enumerable: false,
  configurable: true
});

const iface = {
  // When an interface-module that implements this interface as a mixin is loaded, it will append its own `.is()`
  // method into this array. It allows objects that directly implements *those* interfaces to be recognized as
  // implementing this mixin interface.
  _mixedIntoPredicates: [],
  is(obj) {
    if (obj) {
      if (utils.hasOwn(obj, impl) && obj[impl] instanceof Impl.implementation) {
        return true;
      }
      for (const isMixedInto of module.exports._mixedIntoPredicates) {
        if (isMixedInto(obj)) {
          return true;
        }
      }
    }
    return false;
  },
  isImpl(obj) {
    if (obj) {
      if (obj instanceof Impl.implementation) {
        return true;
      }

      const wrapper = utils.wrapperForImpl(obj);
      for (const isMixedInto of module.exports._mixedIntoPredicates) {
        if (isMixedInto(wrapper)) {
          return true;
        }
      }
    }
    return false;
  },
  convert(obj, { context = "The provided value" } = {}) {
    if (module.exports.is(obj)) {
      return utils.implForWrapper(obj);
    }
    throw new TypeError(`${context} is not of type 'Storage'.`);
  },

  create(constructorArgs, privateData) {
    let obj = Object.create(Storage.prototype);
    obj = this.setup(obj, constructorArgs, privateData);
    return obj;
  },
  createImpl(constructorArgs, privateData) {
    let obj = Object.create(Storage.prototype);
    obj = this.setup(obj, constructorArgs, privateData);
    return utils.implForWrapper(obj);
  },
  _internalSetup(obj) {},
  setup(obj, constructorArgs, privateData) {
    if (!privateData) privateData = {};

    privateData.wrapper = obj;

    this._internalSetup(obj);
    Object.defineProperty(obj, impl, {
      value: new Impl.implementation(constructorArgs, privateData),
      writable: false,
      enumerable: false,
      configurable: true
    });

    obj = new Proxy(obj, {
      get(target, P, receiver) {
        if (typeof P === "symbol") {
          return Reflect.get(target, P, receiver);
        }
        const desc = this.getOwnPropertyDescriptor(target, P);
        if (desc === undefined) {
          const parent = Object.getPrototypeOf(target);
          if (parent === null) {
            return undefined;
          }
          return Reflect.get(target, P, receiver);
        }
        if (!desc.get && !desc.set) {
          return desc.value;
        }
        const getter = desc.get;
        if (getter === undefined) {
          return undefined;
        }
        return Reflect.apply(getter, receiver, []);
      },

      has(target, P) {
        if (typeof P === "symbol") {
          return Reflect.has(target, P);
        }
        const desc = this.getOwnPropertyDescriptor(target, P);
        if (desc !== undefined) {
          return true;
        }
        const parent = Object.getPrototypeOf(target);
        if (parent !== null) {
          return Reflect.has(parent, P);
        }
        return false;
      },

      ownKeys(target) {
        const keys = new Set();

        for (const key of target[impl][utils.supportedPropertyNames]) {
          if (!(key in target)) {
            keys.add(`${key}`);
          }
        }

        for (const key of Reflect.ownKeys(target)) {
          keys.add(key);
        }
        return [...keys];
      },

      getOwnPropertyDescriptor(target, P) {
        if (typeof P === "symbol") {
          return Reflect.getOwnPropertyDescriptor(target, P);
        }
        let ignoreNamedProps = false;

        const namedValue = target[impl].getItem(P);

        if (namedValue !== null && !(P in target) && !ignoreNamedProps) {
          return {
            writable: true,
            enumerable: true,
            configurable: true,
            value: utils.tryWrapperForImpl(namedValue)
          };
        }

        return Reflect.getOwnPropertyDescriptor(target, P);
      },

      set(target, P, V, receiver) {
        if (typeof P === "symbol") {
          return Reflect.set(target, P, V, receiver);
        }
        if (target === receiver) {
          if (typeof P === "string" && !utils.isArrayIndexPropName(P)) {
            let namedValue = V;

            namedValue = conversions["DOMString"](namedValue, {
              context: "Failed to set the '" + P + "' property on 'Storage': The provided value"
            });

            target[impl].setItem(P, namedValue);

            return true;
          }
        }
        let ownDesc;

        if (ownDesc === undefined) {
          ownDesc = Reflect.getOwnPropertyDescriptor(target, P);
        }
        if (ownDesc === undefined) {
          const parent = Reflect.getPrototypeOf(target);
          if (parent !== null) {
            return Reflect.set(parent, P, V, receiver);
          }
          ownDesc = { writable: true, enumerable: true, configurable: true, value: undefined };
        }
        if (!ownDesc.writable) {
          return false;
        }
        if (!utils.isObject(receiver)) {
          return false;
        }
        const existingDesc = Reflect.getOwnPropertyDescriptor(receiver, P);
        let valueDesc;
        if (existingDesc !== undefined) {
          if (existingDesc.get || existingDesc.set) {
            return false;
          }
          if (!existingDesc.writable) {
            return false;
          }
          valueDesc = { value: V };
        } else {
          valueDesc = { writable: true, enumerable: true, configurable: true, value: V };
        }
        return Reflect.defineProperty(receiver, P, valueDesc);
      },

      defineProperty(target, P, desc) {
        if (typeof P === "symbol") {
          return Reflect.defineProperty(target, P, desc);
        }
        if (!utils.hasOwn(target, P)) {
          if (desc.get || desc.set) {
            return false;
          }

          let namedValue = desc.value;

          namedValue = conversions["DOMString"](namedValue, {
            context: "Failed to set the '" + P + "' property on 'Storage': The provided value"
          });

          target[impl].setItem(P, namedValue);

          return true;
        }
        return Reflect.defineProperty(target, P, desc);
      },

      deleteProperty(target, P) {
        if (typeof P === "symbol") {
          return Reflect.deleteProperty(target, P);
        }

        if (target[impl].getItem(P) !== null && !(P in target)) {
          target[impl].removeItem(P);
          return true;
        }

        return Reflect.deleteProperty(target, P);
      },

      preventExtensions() {
        return false;
      }
    });

    obj[impl][utils.wrapperSymbol] = obj;
    if (Impl.init) {
      Impl.init(obj[impl], privateData);
    }
    return obj;
  },
  interface: Storage,
  expose: {
    Window: { Storage }
  }
}; // iface
module.exports = iface;

const Impl = require("../webstorage/Storage-impl.js");
