// 模拟 ComboBoxHelper 类
class ComboBoxHelper {
    static GetIsAutoComplete(target: any): boolean {
        // 模拟实现，实际使用时需根据业务逻辑修改
        return target.isAutoComplete || false;
    }

    RefreshSource(cbx: any, items: any[]) {
        // 模拟实现，实际使用时需根据业务逻辑修改
        cbx.itemsSource = items;
    }

    RegisteAutoComplete(cbx: any, items: any[]) {
        // 模拟实现，实际使用时需根据业务逻辑修改
        cbx.itemsSource = items;
    }
}

// 模拟 ItemsControl 类
class ItemsControl {
    items: any[] = [];
    itemsSource: any[] | null = null;
    isLoaded: boolean = false;
    isAutoComplete: boolean = false;

    constructor() {
        this.items = [];
    }

    addEventListener(event: string, callback: (event: any) => void) {
        // 模拟实现，实际使用时需根据业务逻辑修改
    }
}

// 模拟 Selector 类
class Selector extends ItemsControl {
    selectedIndex: number = -1;
    selectedItem: any = null;
}

// ItemsControlHelper 类
class ItemsControlHelper {
    private static ComboBoxHelperPropertyKey = Symbol('ComboBoxHelper');

    static GetComboBoxHelper(obj: any): ComboBoxHelper | null {
        return obj[this.ComboBoxHelperPropertyKey] as ComboBoxHelper;
    }

    static SetComboBoxHelper(obj: any, value: ComboBoxHelper) {
        obj[this.ComboBoxHelperPropertyKey] = value;
    }

    static AddItems(target: ItemsControl, items: any[]) {
        if (!items) return;

        for (const item of items) {
            if (this.isKeyValuePair(item)) {
                target.items.push(item);
            }
        }
    }

    static SetItems(target: ItemsControl, items: any[]) {
        if (!items) return;

        if (ComboBoxHelper.GetIsAutoComplete(target)) {
            const cbx = target as Selector;
            if (!cbx) return;

            if (cbx.itemsSource) {
                const helper = this.GetComboBoxHelper(cbx);
                if (helper) {
                    helper.RefreshSource(cbx, items);
                }
            } else {
                const helper = new ComboBoxHelper();
                this.SetComboBoxHelper(cbx, helper);
                if (cbx.isLoaded) {
                    helper.RegisteAutoComplete(cbx, items);
                } else {
                    cbx.addEventListener('loaded', () => {
                        helper.RegisteAutoComplete(cbx, items);
                    });
                }
            }
        } else {
            target.items = [];
            this.AddItems(target, items);
            const selector = target as Selector;
            if (selector) {
                selector.selectedIndex = 0;
            }
            // 模拟刷新操作
            target.itemsSource = [...target.items];
        }
    }

    static GetSelectedKey(target: Selector): string {
        let result = '';
        if (target.selectedItem) {
            if (this.isKeyValuePair(target.selectedItem)) {
                result = target.selectedItem.key;
            }
        }
        return result;
    }

    private static isKeyValuePair(obj: any): obj is { key: string; value: string } {
        return obj && typeof obj.key === 'string' && typeof obj.value === 'string';
    }
}

export { ItemsControlHelper, ItemsControl, Selector, ComboBoxHelper };