/**
 * 设置菜单管理器
 */
import * as d3 from 'd3';
import { AdminManager } from './adminManager';
import { showDialog, showAlertDialog } from '../ui/dialog';
import { TextAnalysisAPI } from '../api/GLTR_API';
import { tr } from '../lang/i18n-lite';
import type { ThemeManager } from '../ui/theme';
import type { LanguageManager } from '../ui/language';
import { createSettingsDropdown } from '../ui/settingsDropdown';
import { getTokenRenderStyle, setTokenRenderStyle, type TokenRenderStyle } from './tokenRenderStyle';

export type SettingsMenuCallbacks = {
    onMinimapToggle?: (enabled: boolean) => void;
    onThemeChange?: () => void;
    onLanguageToggle?: () => void;
};

export class SettingsMenuManager {
    private settingsBtn: d3.Selection<Element, unknown, HTMLElement, any>;
    private settingsMenu: d3.Selection<Element, unknown, HTMLElement, any>;
    private adminModeBtn: d3.Selection<Element, unknown, HTMLElement, any>;
    private modelManageBtn: d3.Selection<Element, unknown, HTMLElement, any>;
    private tokenRenderStyleDropdown: { updateCurrent: (v: TokenRenderStyle) => void } | null = null;
    private minimapToggle: d3.Selection<HTMLInputElement, unknown, HTMLElement, any>;
    private themeDropdownContainer: d3.Selection<Element, unknown, HTMLElement, any>;
    private adminManager: AdminManager;
    private api: TextAnalysisAPI;
    private onAdminStateChange?: () => void;
    private callbacks: SettingsMenuCallbacks;
    private themeManager?: ThemeManager;
    private languageManager?: LanguageManager;

    constructor(
        settingsBtnSelector: string,
        settingsMenuSelector: string,
        adminModeBtnSelector: string,
        adminManager: AdminManager,
        api: TextAnalysisAPI,
        onAdminStateChange?: () => void,
        callbacks?: SettingsMenuCallbacks,
        themeManager?: ThemeManager,
        languageManager?: LanguageManager
    ) {
        this.settingsBtn = d3.select(settingsBtnSelector);
        this.settingsMenu = d3.select(settingsMenuSelector);
        this.adminModeBtn = d3.select(adminModeBtnSelector);
        this.modelManageBtn = d3.select('#model_manage_btn');
        this.tokenRenderStyleDropdown = this.initTokenRenderStyleDropdown();
        this.minimapToggle = d3.select<HTMLInputElement, any>('#enable_minimap_toggle');
        this.themeDropdownContainer = d3.select('#theme_dropdown');
        this.adminManager = adminManager;
        this.api = api;
        this.onAdminStateChange = onAdminStateChange;
        this.callbacks = callbacks || {};
        this.themeManager = themeManager;
        this.languageManager = languageManager;

        this.initialize();
    }

    private initialize(): void {
        // 点击齿轮按钮切换菜单
        this.settingsBtn.on('click', (event: MouseEvent) => {
            event.stopPropagation();
            this.toggleMenu();
        });

        // 点击页面其他区域关闭菜单
        d3.select('body').on('click.settings-menu', () => {
            this.closeMenu();
        });

        // 阻止菜单内部点击关闭菜单
        this.settingsMenu.on('click', (event: MouseEvent) => {
            event.stopPropagation();
        });

        // Minimap toggle
        this.minimapToggle.on('change', () => {
            const enabled = (this.minimapToggle.node() as HTMLInputElement)?.checked || false;
            if (this.callbacks.onMinimapToggle) {
                this.callbacks.onMinimapToggle(enabled);
            }
        });

        // Language dropdown - 由 languageManager 初始化，这里只需要确保容器存在
        // 语言切换逻辑在 language.ts 中处理

        // Theme dropdown - 由 themeManager 初始化，这里只需要确保容器存在
        // 主题切换逻辑在 theme.ts 中处理

        // 管理员模式入口（录入 token / 退出）
        this.adminModeBtn.on('click', () => {
            this.closeMenu();
            this.handleAdminModeClick();
        });

        // 模型管理入口（仅管理员模式可见）
        this.modelManageBtn.on('click', () => {
            this.closeMenu();
            this.handleModelManageClick();
        });

        // 初始化 UI 状态
        this.applyAdminUiState();
    }

    private initTokenRenderStyleDropdown(): { updateCurrent: (v: TokenRenderStyle) => void } {
        const container = d3.select('#token_render_style_dropdown');
        const options: Array<{ value: TokenRenderStyle; label: string }> = [
            { value: 'density', label: 'Density' },
            { value: 'classic', label: 'Classic' },
        ];
        const dropdown = createSettingsDropdown<TokenRenderStyle>({
            container,
            classPrefix: 'token-render-style',
            options: options.map((o) => ({ value: o.value, html: `<span>${o.label}</span>` })),
            dataAttr: 'data-style',
            bodyClickNamespace: 'token-render-style-dropdown',
            onSelect: (v) => {
                setTokenRenderStyle(v);
                dropdown.updateCurrent(v);
                window.dispatchEvent(new CustomEvent('token-render-style-change'));
            },
        });
        dropdown.updateCurrent(getTokenRenderStyle());
        return dropdown;
    }

    private closeMenu(): void {
        this.settingsMenu.style('display', 'none');
    }

    private toggleMenu(): void {
        const cur = this.settingsMenu.style('display');
        this.settingsMenu.style('display', cur === 'none' || cur === '' ? 'block' : 'none');
    }

    /**
     * 根据管理员模式更新菜单项文案
     */
    public applyAdminUiState(): void {
        const isAdmin = this.adminManager.isInAdminMode();

        this.adminModeBtn.text(isAdmin ? 'Exit' : 'Enter');
        this.adminModeBtn.classed('active', isAdmin);

        // 显示/隐藏所有带 data-admin-only 的菜单项
        this.settingsMenu.selectAll<HTMLElement, unknown>('.settings-menu-item[data-admin-only]')
            .style('display', isAdmin ? null : 'none');
        this.tokenRenderStyleDropdown?.updateCurrent(getTokenRenderStyle());

        // 通知外部更新 UI
        if (this.onAdminStateChange) {
            this.onAdminStateChange();
        }
    }

    /**
     * 设置 minimap 的初始状态
     */
    public setMinimapEnabled(enabled: boolean): void {
        const checkbox = this.minimapToggle.node() as HTMLInputElement | null;
        if (checkbox) {
            checkbox.checked = enabled;
        }
    }

    private handleAdminModeClick(): void {
        if (this.adminManager.isInAdminMode()) {
            this.adminManager.clearAdminTokenAndNotify();
            // 刷新页面以让 demoManager 等基于配置的模块重新初始化
            window.location.reload();
            return;
        }

        showDialog({
            title: 'Admin Mode',
            content: (dialog) => {
                const container = dialog.append('div').attr('class', 'dialog-form-container');
                container.append('label')
                    .attr('class', 'dialog-label')
                    .text('Please enter admin token:');

                const input = container.append('input')
                    .attr('type', 'password')
                    .attr('class', 'dialog-input')
                    .attr('placeholder', 'INFORADAR_ADMIN_TOKEN');

                return {
                    getValue: () => (input.node() as HTMLInputElement | null)?.value?.trim() || '',
                    validate: () => ((input.node() as HTMLInputElement | null)?.value?.trim() || '').length > 0,
                    focus: () => {
                        const n = input.node() as HTMLInputElement | null;
                        if (n) n.focus();
                    }
                };
            },
            onConfirm: async (token: string) => {
                const { success, message } = await this.adminManager.setAdminTokenAndNotify(token);
                if (!success) {
                    showAlertDialog(tr('Error'), message || 'Admin token verification failed.');
                    return;
                }

                // 注入到 API，随后刷新页面以启用文件夹操作等（初始化期配置）
                this.api.setAdminToken(this.adminManager.getAdminToken());
                window.location.reload();
            },
            onCancel: () => {},
            confirmText: 'Enter',
            cancelText: tr('Cancel'),
            width: 'clamp(300px, 90vw, 420px)'
        });
    }

    private async handleModelManageClick(): Promise<void> {
        try {
            // 获取可用模型和当前模型
            const [availableModelsResp, currentModelResp] = await Promise.all([
                this.api.getAvailableModels(),
                this.api.getCurrentModel()
            ]);

            if (!availableModelsResp.success || !currentModelResp.success) {
                showAlertDialog(tr('Error'), 'Failed to load model management information');
                return;
            }

            let models = availableModelsResp.models;
            let currentModel = currentModelResp.model;
            let deviceType = currentModelResp.device_type;
            let currentUseInt8 = currentModelResp.use_int8;
            let currentUseBfloat16 = currentModelResp.use_bfloat16;
            let isLoading = currentModelResp.loading;

            let pollId: number | null = null;
            let setConfirmBtnState: (enabled: boolean, queuing?: boolean) => void = () => {};
            // 显示模型管理弹窗
            showDialog({
                title: 'Model Management',
                loadingConfirmText: 'Applying...',
                content: (dialog, setConfirmButtonState) => {
                    setConfirmBtnState = setConfirmButtonState ?? (() => {});
                    const container = dialog.append('div').attr('class', 'dialog-form-container');
                    
                    // 显示当前模型和设备信息
                    const deviceInfo = container.append('div')
                        .attr('class', 'device-info')
                        .style('margin-bottom', '12px')
                        .style('padding', '8px')
                        .style('background-color', 'var(--panel-bg)')
                        .style('border-radius', '4px')
                        .style('font-size', '12px');
                    
                    // 标题行：包含当前模型和刷新按钮
                    const titleRow = deviceInfo.append('div')
                        .style('display', 'flex')
                        .style('justify-content', 'space-between')
                        .style('align-items', 'center')
                        .style('margin-bottom', '6px');
                    
                    const modelTitle = titleRow.append('div')
                        .style('font-weight', 'bold')
                        .style('color', 'var(--primary-color, #2196F3)');
                    
                    const refreshBtn = titleRow.append('button')
                        .attr('class', 'refresh-btn')
                        .attr('title', 'Refresh')
                        .text('↻');
                    
                    // 请求发出时隐藏文字（用透明度保留占位，避免布局重排导致整窗闪）
                    const hideDisplay = () => {
                        deviceInfo.style('opacity', '0');
                    };
                    
                    // 请求返回后重绘并显示
                    const updateDisplay = () => {
                        modelTitle.text(`Current Model: ${currentModel}${isLoading ? ' (Loading...)' : ''}`);
                        deviceInfo.select('.device-type').text(`Device Type: ${deviceType.toUpperCase()}`);
                        const currentQuantization = currentUseInt8 ? 'INT8' : 
                                                  currentUseBfloat16 ? 'bfloat16' : 
                                                  deviceType === 'cpu' ? 'float32' : 'float16';
                        deviceInfo.select('.quantization').text(`Current Quantization: ${currentQuantization}`);
                        deviceInfo.style('opacity', '1');
                    };
                    
                    deviceInfo.append('div').attr('class', 'device-type');
                    deviceInfo.append('div').attr('class', 'quantization');
                    updateDisplay();
                    
                    // 拉取当前模型并更新显示（轮询与刷新共用）；只有收到成功响应才恢复文字
                    const fetchAndUpdate = async () => {
                        hideDisplay();
                        try {
                            const resp = await this.api.getCurrentModel();
                            if (resp.success) {
                                currentModel = resp.model;
                                deviceType = resp.device_type;
                                currentUseInt8 = resp.use_int8;
                                currentUseBfloat16 = resp.use_bfloat16;
                                isLoading = resp.loading;
                                updateDisplay();
                            }
                        } catch {
                            // 未收到或失败不恢复，保持隐藏
                        }
                    };
                    
                    // 刷新按钮点击事件
                    refreshBtn.on('click', async () => {
                        refreshBtn.property('disabled', true).text('…');
                        await fetchAndUpdate();
                        refreshBtn.property('disabled', false).text('↻');
                    });
                    
                    // 2s 一次后台轮询，弹窗关闭后清除
                    const overlay = deviceInfo.node()?.closest('.dialog-overlay');
                    const pollMs = 2000;
                    pollId = window.setInterval(async () => {
                        if (!overlay?.isConnected) {
                            if (pollId != null) window.clearInterval(pollId);
                            pollId = null;
                            return;
                        }
                        await fetchAndUpdate();
                    }, pollMs);
                    
                    container.append('label')
                        .attr('class', 'dialog-label')
                        .style('margin-top', '12px')
                        .text('Select model:');

                    // 创建模型列表
                    const modelList = container.append('div')
                        .attr('class', 'model-list')
                        .style('max-height', '200px')
                        .style('overflow-y', 'auto')
                        .style('margin-top', '8px');

                    let selectedModel = currentModel;

                    models.forEach(model => {
                        const modelItem = modelList.append('div')
                            .attr('class', 'model-item')
                            .style('padding', '8px 12px')
                            .style('margin', '4px 0')
                            .style('border', '1px solid var(--border-color, #ddd)')
                            .style('border-radius', '4px')
                            .style('cursor', 'pointer')
                            .style('transition', 'background-color 0.2s')
                            .classed('current-model', model === currentModel);

                        // 如果是当前模型，显示标记
                        if (model === currentModel) {
                            modelItem.style('background-color', 'var(--bg-hover, #f0f0f0)')
                                .style('font-weight', 'bold');
                        }

                        modelItem.append('span').text(model);

                        // 点击选择模型
                        modelItem.on('click', function() {
                            selectedModel = model;
                            // 更新选中样式
                            modelList.selectAll('.model-item')
                                .style('background-color', null)
                                .style('font-weight', null);
                            d3.select(this)
                                .style('background-color', 'var(--bg-hover, #f0f0f0)')
                                .style('font-weight', 'bold');
                        });

                        // 鼠标悬停效果
                        modelItem.on('mouseenter', function() {
                            if (model !== selectedModel) {
                                d3.select(this).style('background-color', 'var(--bg-hover-light, #f8f8f8)');
                            }
                        }).on('mouseleave', function() {
                            if (model !== selectedModel) {
                                d3.select(this).style('background-color', null);
                            }
                        });
                    });

                    // 量化选项
                    container.append('label')
                        .attr('class', 'dialog-label')
                        .style('margin-top', '16px')
                        .text('Quantization Options:');
                    
                    const quantizationOptions = container.append('div')
                        .attr('class', 'quantization-options')
                        .style('margin-top', '8px')
                        .style('padding', '8px')
                        .style('border', '1px solid var(--border-color, #ddd)')
                        .style('border-radius', '4px');
                    
                    // INT8 选项
                    const int8Option = quantizationOptions.append('div')
                        .style('margin-bottom', '8px');
                    
                    const int8Checkbox = int8Option.append('input')
                        .attr('type', 'checkbox')
                        .attr('id', 'use_int8_checkbox')
                        .property('checked', currentUseInt8)
                        .property('disabled', deviceType === 'mps');
                    
                    const int8LabelText = deviceType === 'mps'
                        ? 'Use INT8 Quantization (not supported on MPS)'
                        : 'Use INT8 Quantization';
                    int8Option.append('label')
                        .attr('for', 'use_int8_checkbox')
                        .style('margin-left', '6px')
                        .style('cursor', deviceType === 'mps' ? 'not-allowed' : 'pointer')
                        .style('color', deviceType === 'mps' ? 'var(--text-disabled, #999)' : null)
                        .text(int8LabelText);
                    
                    // bfloat16 选项
                    const bfloat16Option = quantizationOptions.append('div');
                    
                    const bfloat16Checkbox = bfloat16Option.append('input')
                        .attr('type', 'checkbox')
                        .attr('id', 'use_bfloat16_checkbox')
                        .property('checked', currentUseBfloat16)
                        .property('disabled', deviceType !== 'cpu');
                    
                    const bfloat16LabelText = deviceType !== 'cpu'
                        ? 'Use bfloat16 (CPU only)'
                        : 'Use bfloat16';
                    bfloat16Option.append('label')
                        .attr('for', 'use_bfloat16_checkbox')
                        .style('margin-left', '6px')
                        .style('cursor', deviceType !== 'cpu' ? 'not-allowed' : 'pointer')
                        .style('color', deviceType !== 'cpu' ? 'var(--text-disabled, #999)' : null)
                        .text(bfloat16LabelText);
                    
                    // 互斥逻辑
                    int8Checkbox.on('change', function() {
                        if ((this as HTMLInputElement).checked) {
                            bfloat16Checkbox.property('checked', false);
                        }
                    });
                    
                    bfloat16Checkbox.on('change', function() {
                        if ((this as HTMLInputElement).checked) {
                            int8Checkbox.property('checked', false);
                        }
                    });

                    return {
                        getValue: () => ({
                            model: selectedModel,
                            use_int8: (int8Checkbox.node() as HTMLInputElement)?.checked || false,
                            use_bfloat16: (bfloat16Checkbox.node() as HTMLInputElement)?.checked || false
                        }),
                        validate: () => {
                            // 如果正在加载，禁用确认按钮
                            if (isLoading) return false;
                            
                            const useInt8 = (int8Checkbox.node() as HTMLInputElement)?.checked || false;
                            const useBfloat16 = (bfloat16Checkbox.node() as HTMLInputElement)?.checked || false;
                            return selectedModel !== currentModel || 
                                   useInt8 !== currentUseInt8 || 
                                   useBfloat16 !== currentUseBfloat16;
                        },
                        focus: () => {}
                    };
                },
                onConfirm: async (params: { model: string, use_int8: boolean, use_bfloat16: boolean }) => {
                    setConfirmBtnState(false, true);
                    try {
                        const result = await this.api.switchModel(
                            params.model,
                            params.use_int8,
                            params.use_bfloat16
                        );
                        setConfirmBtnState(true, false);
                        if (result.success) {
                            showAlertDialog(
                                tr('Success'),
                                result.message || 'Model settings applied. The selected model will be used for the next analysis.'
                            );
                        } else {
                            showAlertDialog(tr('Error'), result.message || 'Failed to apply model settings');
                        }
                    } catch (error: any) {
                        setConfirmBtnState(true, false);
                        showAlertDialog(tr('Error'), 'Failed to apply model settings: ' + error.message);
                    }
                    return false; // 保持弹窗打开
                },
                onCancel: () => {
                    if (pollId != null) {
                        window.clearInterval(pollId);
                        pollId = null;
                    }
                },
                confirmText: 'Apply',
                cancelText: tr('Exit'),
                width: 'clamp(400px, 90vw, 500px)'
            });

        } catch (error) {
            console.error('Failed to load models:', error);
            showAlertDialog(tr('Error'), 'Failed to load model management information');
        }
    }
}