"use strict";

var _to_array = require("./_to_array.cjs");
var _to_property_key = require("./_to_property_key.cjs");
var _type_of = require("./_type_of.cjs");

exports._ = exports._decorate = _decorate;
function _decorate(decorators, factory, superClass) {
    var r = factory(function initialize(O) {
        _initializeInstanceElements(O, decorated.elements);
    }, superClass);
    var decorated = _decorateClass(_coalesceClassElements(r.d.map(_createElementDescriptor)), decorators);
    _initializeClassElements(r.F, decorated.elements);

    return _runClassFinishers(r.F, decorated.finishers);
}

function _createElementDescriptor(def) {
    var key = _to_property_key._(def.key);
    var descriptor;

    if (def.kind === "method") {
        descriptor = { value: def.value, writable: true, configurable: true, enumerable: false };
        Object.defineProperty(def.value, "name", { value: _type_of._(key) === "symbol" ? "" : key, configurable: true });
    } else if (def.kind === "get") descriptor = { get: def.value, configurable: true, enumerable: false };
    else if (def.kind === "set") descriptor = { set: def.value, configurable: true, enumerable: false };
    else if (def.kind === "field") descriptor = { configurable: true, writable: true, enumerable: true };

    var element = { kind: def.kind === "field" ? "field" : "method", key: key, placement: def.static ? "static" : def.kind === "field" ? "own" : "prototype", descriptor: descriptor };

    if (def.decorators) element.decorators = def.decorators;

    if (def.kind === "field") element.initializer = def.value;

    return element;
}
function _coalesceGetterSetter(element, other) {
    if (element.descriptor.get !== undefined) other.descriptor.get = element.descriptor.get;
    else other.descriptor.set = element.descriptor.set;
}
function _coalesceClassElements(elements) {
    var newElements = [];
    var isSameElement = function isSameElement(other) {
        return other.kind === "method" && other.key === element.key && other.placement === element.placement;
    };

    for (var i = 0; i < elements.length; i++) {
        var element = elements[i];
        var other;

        if (element.kind === "method" && (other = newElements.find(isSameElement))) {
            if (_isDataDescriptor(element.descriptor) || _isDataDescriptor(other.descriptor)) {
                if (_hasDecorators(element) || _hasDecorators(other)) {
                    throw new ReferenceError("Duplicated methods (" + element.key + ") can't be decorated.");
                }
                other.descriptor = element.descriptor;
            } else {
                if (_hasDecorators(element)) {
                    if (_hasDecorators(other)) {
                        throw new ReferenceError("Decorators can't be placed on different accessors with for " + "the same property (" + element.key + ").");
                    }
                    other.decorators = element.decorators;
                }
                _coalesceGetterSetter(element, other);
            }
        } else {
            newElements.push(element);
        }
    }

    return newElements;
}
function _hasDecorators(element) {
    return element.decorators && element.decorators.length;
}
function _isDataDescriptor(desc) {
    return desc !== undefined && !(desc.value === undefined && desc.writable === undefined);
}
function _initializeClassElements(F, elements) {
    var proto = F.prototype;
    ["method", "field"].forEach(function(kind) {
        elements.forEach(function(element) {
            var placement = element.placement;
            if (element.kind === kind && (placement === "static" || placement === "prototype")) {
                var receiver = placement === "static" ? F : proto;
                _defineClassElement(receiver, element);
            }
        });
    });
}
function _initializeInstanceElements(O, elements) {
    ["method", "field"].forEach(function(kind) {
        elements.forEach(function(element) {
            if (element.kind === kind && element.placement === "own") _defineClassElement(O, element);
        });
    });
}
function _defineClassElement(receiver, element) {
    var descriptor = element.descriptor;
    if (element.kind === "field") {
        var initializer = element.initializer;
        descriptor = { enumerable: descriptor.enumerable, writable: descriptor.writable, configurable: descriptor.configurable, value: initializer === void 0 ? void 0 : initializer.call(receiver) };
    }
    Object.defineProperty(receiver, element.key, descriptor);
}
function _decorateClass(elements, decorators) {
    var newElements = [];
    var finishers = [];
    var placements = { static: [], prototype: [], own: [] };
    elements.forEach(function(element) {
        _addElementPlacement(element, placements);
    });
    elements.forEach(function(element) {
        if (!_hasDecorators(element)) return newElements.push(element);
        var elementFinishersExtras = _decorateElement(element, placements);
        newElements.push(elementFinishersExtras.element);
        newElements.push.apply(newElements, elementFinishersExtras.extras);
        finishers.push.apply(finishers, elementFinishersExtras.finishers);
    });
    if (!decorators) return { elements: newElements, finishers: finishers };
    var result = _decorateConstructor(newElements, decorators);
    finishers.push.apply(finishers, result.finishers);
    result.finishers = finishers;

    return result;
}
function _addElementPlacement(element, placements, silent) {
    var keys = placements[element.placement];
    if (!silent && keys.indexOf(element.key) !== -1) throw new TypeError("Duplicated element (" + element.key + ")");
    keys.push(element.key);
}
function _decorateElement(element, placements) {
    var extras = [];
    var finishers = [];
    for (var decorators = element.decorators, i = decorators.length - 1; i >= 0; i--) {
        var keys = placements[element.placement];
        keys.splice(keys.indexOf(element.key), 1);
        var elementObject = _fromElementDescriptor(element);
        var elementFinisherExtras = _toElementFinisherExtras((0, decorators[i])(elementObject) || elementObject);
        element = elementFinisherExtras.element;
        _addElementPlacement(element, placements);
        if (elementFinisherExtras.finisher) finishers.push(elementFinisherExtras.finisher);
        var newExtras = elementFinisherExtras.extras;
        if (newExtras) {
            for (var j = 0; j < newExtras.length; j++) _addElementPlacement(newExtras[j], placements);
            extras.push.apply(extras, newExtras);
        }
    }

    return { element: element, finishers: finishers, extras: extras };
}
function _decorateConstructor(elements, decorators) {
    var finishers = [];
    for (var i = decorators.length - 1; i >= 0; i--) {
        var obj = _fromClassDescriptor(elements);
        var elementsAndFinisher = _toClassDescriptor((0, decorators[i])(obj) || obj);
        if (elementsAndFinisher.finisher !== undefined) finishers.push(elementsAndFinisher.finisher);
        if (elementsAndFinisher.elements !== undefined) {
            elements = elementsAndFinisher.elements;
            for (var j = 0; j < elements.length - 1; j++) {
                for (var k = j + 1; k < elements.length; k++) {
                    if (elements[j].key === elements[k].key && elements[j].placement === elements[k].placement) {
                        throw new TypeError("Duplicated element (" + elements[j].key + ")");
                    }
                }
            }
        }
    }

    return { elements: elements, finishers: finishers };
}
function _fromElementDescriptor(element) {
    var obj = { kind: element.kind, key: element.key, placement: element.placement, descriptor: element.descriptor };
    var desc = { value: "Descriptor", configurable: true };
    Object.defineProperty(obj, Symbol.toStringTag, desc);
    if (element.kind === "field") obj.initializer = element.initializer;

    return obj;
}
function _toElementDescriptors(elementObjects) {
    if (elementObjects === undefined) return;

    return _to_array._(elementObjects).map(function(elementObject) {
        var element = _toElementDescriptor(elementObject);
        _disallowProperty(elementObject, "finisher", "An element descriptor");
        _disallowProperty(elementObject, "extras", "An element descriptor");

        return element;
    });
}
function _toElementDescriptor(elementObject) {
    var kind = String(elementObject.kind);
    if (kind !== "method" && kind !== "field") {
        throw new TypeError("An element descriptor's .kind property must be either \"method\" or" + " \"field\", but a decorator created an element descriptor with" + " .kind \"" + kind + "\"");
    }
    var key = _to_property_key._(elementObject.key);
    var placement = String(elementObject.placement);
    if (placement !== "static" && placement !== "prototype" && placement !== "own") {
        throw new TypeError(
            "An element descriptor's .placement property must be one of \"static\","
                + " \"prototype\" or \"own\", but a decorator created an element descriptor"
                + " with .placement \""
                + placement
                + "\""
        );
    }
    var descriptor = elementObject.descriptor;
    _disallowProperty(elementObject, "elements", "An element descriptor");
    var element = { kind: kind, key: key, placement: placement, descriptor: Object.assign({}, descriptor) };
    if (kind !== "field") _disallowProperty(elementObject, "initializer", "A method descriptor");
    else {
        _disallowProperty(descriptor, "get", "The property descriptor of a field descriptor");
        _disallowProperty(descriptor, "set", "The property descriptor of a field descriptor");
        _disallowProperty(descriptor, "value", "The property descriptor of a field descriptor");
        element.initializer = elementObject.initializer;
    }

    return element;
}
function _toElementFinisherExtras(elementObject) {
    var element = _toElementDescriptor(elementObject);
    var finisher = _optionalCallableProperty(elementObject, "finisher");
    var extras = _toElementDescriptors(elementObject.extras);

    return { element: element, finisher: finisher, extras: extras };
}
function _fromClassDescriptor(elements) {
    var obj = { kind: "class", elements: elements.map(_fromElementDescriptor) };
    var desc = { value: "Descriptor", configurable: true };
    Object.defineProperty(obj, Symbol.toStringTag, desc);

    return obj;
}
function _toClassDescriptor(obj) {
    var kind = String(obj.kind);
    if (kind !== "class") {
        throw new TypeError("A class descriptor's .kind property must be \"class\", but a decorator" + " created a class descriptor with .kind \"" + kind + "\"");
    }
    _disallowProperty(obj, "key", "A class descriptor");
    _disallowProperty(obj, "placement", "A class descriptor");
    _disallowProperty(obj, "descriptor", "A class descriptor");
    _disallowProperty(obj, "initializer", "A class descriptor");
    _disallowProperty(obj, "extras", "A class descriptor");
    var finisher = _optionalCallableProperty(obj, "finisher");
    var elements = _toElementDescriptors(obj.elements);

    return { elements: elements, finisher: finisher };
}
function _disallowProperty(obj, name, objectType) {
    if (obj[name] !== undefined) throw new TypeError(objectType + " can't have a ." + name + " property.");
}
function _optionalCallableProperty(obj, name) {
    var value = obj[name];
    if (value !== undefined && typeof value !== "function") {
        throw new TypeError("Expected '" + name + "' to be a function");
    }

    return value;
}
function _runClassFinishers(constructor, finishers) {
    for (var i = 0; i < finishers.length; i++) {
        var newConstructor = (0, finishers[i])(constructor);
        if (newConstructor !== undefined) {
            if (typeof newConstructor !== "function") throw new TypeError("Finishers must return a constructor.");
            constructor = newConstructor;
        }
    }

    return constructor;
}