'use strict';

/**
 * @description сравнение элементов двух массивов. Элементы сравниваются через оператор ===
 * @param {Object[]} arr1
 * @param {Object[]} arr2
 * @returns {boolean}
 */
function arrayElementsEquals(arr1, arr2) {
    if (arr1 === arr2) {
        return true;
    }
    if (arr1.length !== arr2.length) {
        return false;
    }
    for (let e of arr1) {
        if (!arr2.includes(e)) {
            return false;
        }
    }

    return true;
}

function containsKeysExtension(instance, keys) {
    for (let key of keys) {
        if (!instance.hasOwnProperty(key)) {
            return false;
        }
    }

    return true;
}

function hasKeysExtension(instance, keys) {
    let instanceKeys = Array.from(Object.keys(instance));

    return arrayElementsEquals(instanceKeys, keys);
}

function containValuesExtension(instance, values) {
    let instanceValues = Array.from(Object.values(instance));
    for (let value of values) {
        if (!instanceValues.includes(value)) {
            return false;
        }
    }

    return true;
}

function hasValueTypeExtension(instance, key, expectedType) {
    let objectForCheckType = instance[key];

    switch (typeof objectForCheckType) {
        case 'number':
            return expectedType === Number;
        case 'function':
            return expectedType === Function;
        case 'string':
            return expectedType === String;
        case 'object':
            return expectedType === Array;
        default:
            return false;
    }
}

function hasLengthExtension(instance, expectedLength) {
    return instance.length === expectedLength;
}

function hasValuesExtension(instance, values) {
    let instanceValues = Array.from(Object.values(instance));

    return arrayElementsEquals(instanceValues, values);
}

function hasWordsCountExtension(instance, expectedWordsCount) {
    let wordsCount = instance.split(' ').length;

    return wordsCount === expectedWordsCount;
}

/**
 * Проверяет, верно ли, что у функции expectedParamsCount параметров
 * @param {Function} instance
 * @param {Number} expectedParamsCount
 * @returns {Boolean}
 */
function hasParamsCountExtension(instance, expectedParamsCount) {
    return instance.length === expectedParamsCount;
}

function initObjectExtensions() {
    Object.defineProperty(Object.prototype, 'check', {
        get() {
            const instance = this;

            return {
                containsKeys(keys) {
                    return containsKeysExtension(instance, keys);
                },
                hasKeys(keys) {
                    return hasKeysExtension(instance, keys);
                },
                containsValues(values) {
                    return containValuesExtension(instance, values);
                },
                hasValues(values) {
                    return hasValuesExtension(instance, values);
                },
                hasValueType(key, expectedType) {
                    return hasValueTypeExtension(instance, key, expectedType);
                },
                not: {
                    containsKeys(keys) {
                        return !containsKeysExtension(instance, keys);
                    },
                    hasKeys(keys) {
                        return !hasKeysExtension(instance, keys);
                    },
                    containsValues(values) {
                        return !containValuesExtension(instance, values);
                    },
                    hasValues(values) {
                        return !hasValuesExtension(instance, values);
                    },
                    hasValueType(key, expectedType) {
                        return !hasValueTypeExtension(instance, key, expectedType);
                    }
                }
            };
        }
    });

}

function initStringExtensions() {
    Object.defineProperty(String.prototype, 'check', {
        get() {
            const instance = this;

            return {
                hasLength(expectedLength) {
                    return hasLengthExtension(instance, expectedLength);
                },
                hasWordsCount(expectedCount) {
                    return hasWordsCountExtension(instance, expectedCount);
                },
                not: {
                    hasLength(expectedLength) {
                        return !hasLengthExtension(instance, expectedLength);
                    },
                    hasWordsCount(expectedCount) {
                        return !hasWordsCountExtension(instance, expectedCount);
                    }
                }
            };
        }
    });
}


function initArrayExtensions() {
    Object.defineProperty(Array.prototype, 'check', {
        get() {
            const instance = this;

            return {
                containsKeys(keys) {
                    return containsKeysExtension(instance, keys);
                },
                hasKeys(keys) {
                    return hasKeysExtension(instance, keys);
                },
                containsValues(values) {
                    return containValuesExtension(instance, values);
                },
                hasValues(values) {
                    return hasValuesExtension(instance, values);
                },
                hasLength(expectedLength) {
                    return hasLengthExtension(instance, expectedLength);
                },
                hasValueType(key, expectedType) {
                    return hasValueTypeExtension(instance, key, expectedType);
                },
                not: {
                    containsKeys(keys) {
                        return !containsKeysExtension(instance, keys);
                    },
                    hasKeys(keys) {
                        return !hasKeysExtension(instance, keys);
                    },
                    containsValues(values) {
                        return !containValuesExtension(instance, values);
                    },
                    hasValues(values) {
                        return !hasValuesExtension(instance, values);
                    },
                    hasLength(expectedLength) {
                        return !hasLengthExtension(instance, expectedLength);
                    },
                    hasValueType(key, expectedType) {
                        return !hasValueTypeExtension(instance, key, expectedType);
                    }
                }
            };
        }
    });
}

function initFunctionExtensions() {
    Object.defineProperty(Function.prototype, 'check', {
        get() {
            const instance = this;

            return {
                hasParamsCount(paramsCount) {
                    return hasParamsCountExtension(instance, paramsCount);
                },
                not: {
                    hasParamsCount(paramsCount) {
                        return !hasParamsCountExtension(instance, paramsCount);
                    }
                }
            };
        }
    });
}

function wrap(instance) {
    const isNull = (instance === null);
    const typeOfInstance = typeof instance;

    return {
        containsKeys(keys) {
            return !isNull && typeOfInstance === 'object'
                ? instance.check.containsKeys(keys)
                : false;
        },
        isNull() {
            return isNull;
        },
        hasKeys(keys) {
            return !isNull && typeOfInstance === 'object'
                ? instance.check.hasKeys(keys)
                : false;
        },
        containsValues(values) {
            return !isNull && typeOfInstance === 'object'
                ? instance.check.containsValues(values)
                : false;
        },
        hasValues(values) {
            return !isNull && typeOfInstance === 'object'
                ? instance.check.hasValues(values)
                : false;
        },
        hasValueType(key, type) {
            return !isNull && typeOfInstance === 'object'
                ? instance.check.hasValueType(key, type)
                : false;
        },
        hasLength(expectedLength) {
            return !isNull && (typeOfInstance === 'object' || typeOfInstance === 'string')
                ? instance.check.hasLength(expectedLength)
                : false;
        },
        hasParamsCount(expectedCount) {
            return !isNull && (typeOfInstance === 'function')
                ? instance.check.hasParamsCount(expectedCount)
                : false;
        },
        hasWordsCount(expectedCount) {
            return !isNull && (typeOfInstance === 'string')
                ? instance.check.hasWordsCount(expectedCount)
                : false;
        },
        not: {
            containsKeys(keys) {
                return !isNull && typeOfInstance === 'object'
                    ? !instance.check.containsKeys(keys)
                    : false;
            },
            isNull() {
                return isNull;
            },
            hasKeys(keys) {
                return !isNull && typeOfInstance === 'object'
                    ? !instance.check.hasKeys(keys)
                    : false;
            },
            containsValues(values) {
                return !isNull && typeOfInstance === 'object'
                    ? !instance.check.containsValues(values)
                    : false;
            },
            hasValues(values) {
                return !isNull && typeOfInstance === 'object'
                    ? !instance.check.hasValues(values)
                    : false;
            },
            hasValueType(key, type) {
                return !isNull && typeOfInstance === 'object'
                    ? !instance.check.hasValueType(key, type)
                    : false;
            },
            hasLength(expectedLength) {
                return !isNull && (typeOfInstance === 'object' || typeOfInstance === 'string')
                    ? !instance.check.hasLength(expectedLength)
                    : false;
            },
            hasParamsCount(expectedCount) {
                return !isNull && (typeOfInstance === 'function')
                    ? !instance.check.hasParamsCount(expectedCount)
                    : false;
            },
            hasWordsCount(expectedCount) {
                return !isNull && (typeOfInstance === 'string')
                    ? !instance.check.hasWordsCount(expectedCount)
                    : false;
            }
        },
        check: {
            containsKeys(keys) {
                return !isNull && typeOfInstance === 'object'
                    ? instance.check.containsKeys(keys)
                    : false;
            },
            isNull() {
                return isNull;
            },
            hasKeys(keys) {
                return !isNull && typeOfInstance === 'object'
                    ? instance.check.hasKeys(keys)
                    : false;
            },
            containsValues(values) {
                return !isNull && typeOfInstance === 'object'
                    ? instance.check.containsValues(values)
                    : false;
            },
            hasValues(values) {
                return !isNull && typeOfInstance === 'object'
                    ? instance.check.hasValues(values)
                    : false;
            },
            hasValueType(key, type) {
                return !isNull && typeOfInstance === 'object'
                    ? instance.check.hasValueType(key, type)
                    : false;
            },
            hasLength(expectedLength) {
                return !isNull && (typeOfInstance === 'object' || typeOfInstance === 'string')
                    ? instance.check.hasLength(expectedLength)
                    : false;
            },
            hasParamsCount(expectedCount) {
                return !isNull && (typeOfInstance === 'function')
                    ? instance.check.hasParamsCount(expectedCount)
                    : false;
            },
            hasWordsCount(expectedCount) {
                return !isNull && (typeOfInstance === 'string')
                    ? instance.check.hasWordsCount(expectedCount)
                    : false;
            },
            not: {
                containsKeys(keys) {
                    return !isNull && typeOfInstance === 'object'
                        ? !instance.check.containsKeys(keys)
                        : false;
                },
                isNull() {
                    return isNull;
                },
                hasKeys(keys) {
                    return !isNull && typeOfInstance === 'object'
                        ? !instance.check.hasKeys(keys)
                        : false;
                },
                containsValues(values) {
                    return !isNull && typeOfInstance === 'object'
                        ? !instance.check.containsValues(values)
                        : false;
                },
                hasValues(values) {
                    return !isNull && typeOfInstance === 'object'
                        ? !instance.check.hasValues(values)
                        : false;
                },
                hasValueType(key, type) {
                    return !isNull && typeOfInstance === 'object'
                        ? !instance.check.hasValueType(key, type)
                        : false;
                },
                hasLength(expectedLength) {
                    return !isNull && (typeOfInstance === 'object' || typeOfInstance === 'string')
                        ? !instance.check.hasLength(expectedLength)
                        : false;
                },
                hasParamsCount(expectedCount) {
                    return !isNull && (typeOfInstance === 'function')
                        ? !instance.check.hasParamsCount(expectedCount)
                        : false;
                },
                hasWordsCount(expectedCount) {
                    return !isNull && (typeOfInstance === 'string')
                        ? !instance.check.hasWordsCount(expectedCount)
                        : false;
                }
            }
        }
    };
}

exports.init = function () {
    initObjectExtensions();
    initArrayExtensions();
    initStringExtensions();
    initFunctionExtensions();
};

exports.wrap = wrap;