import { defineStore } from 'pinia';
import { MessageApi, MessageMockData } from '/@/utils/messageApi';

// 消息类型
export interface MessageItem {
    id: number;
    title: string;
    content: string;
    type: number;        // 1-系统通知，2-站内信，3-待办事项，4-公告通知
    senderId: number;
    senderName: string;
    receiverId: number;
    receiverName: string;
    status: number;      // 0-未读，1-已读，2-已删除
    priority: number;    // 0-普通，1-重要，2-紧急
    bizType?: string;
    bizId?: number;
    readTime?: string;
    createTime: string;
}

// 消息类型枚举
export const MessageType = {
    SYSTEM: 1,      // 系统通知
    LETTER: 2,      // 站内信
    TODO: 3,        // 待办事项
    NOTICE: 4       // 公告通知
};

// 消息类型标签（从字典读取）
import Session from '/@/utils/session';

const getDictLabel = (code: string, value: number): string => {
    const dicts = Session.get("dicts");
    if (!dicts) return '';
    const item = dicts[code]?.find((k: any) => k.value == value);
    return item?.name || '';
};

const getDictColor = (code: string, value: number): string => {
    const dicts = Session.get("dicts");
    if (!dicts) return '';
    const item = dicts[code]?.find((k: any) => k.value == value);
    return item?.color || '';
};

export const getMessageTypeLabel = (type: number) => getDictLabel('message_type', type);
export const getPriorityLabel = (priority: number) => getDictLabel('priority', priority);
export const getPriorityColor = (priority: number) => getDictColor('priority', priority);

// 是否使用Mock数据
const useMock = true;

/**
 * 消息通知 Store
 */
export const useMessageStore = defineStore('message', {
    state: () => ({
        // 未读消息数量
        unreadCount: 0,
        // 各类型未读数量
        unreadCountByType: {
            1: 0, // 系统通知
            2: 0, // 站内信
            3: 0, // 待办事项
            4: 0  // 公告通知
        } as Record<number, number>,
        // 最新未读消息（用于下拉预览）
        latestMessages: [] as MessageItem[],
        // 消息列表（完整分页列表）
        messageList: [] as MessageItem[],
        // 分页信息
        pagination: {
            pageNum: 1,
            pageSize: 10,
            total: 0
        },
        // 当前选中的消息类型筛选
        currentType: null as number | null,
        // 轮询定时器
        pollingTimer: null as any,
        // 是否正在加载
        loading: false
    }),
    
    getters: {
        // 是否有未读消息
        hasUnread: (state) => state.unreadCount > 0,
        // 获取某类型的未读数量
        getUnreadByType: (state) => (type: number) => state.unreadCountByType[type] || 0
    },
    
    actions: {
        /**
         * 获取未读消息数量
         */
        async fetchUnreadCount() {
            try {
                if (useMock) {
                    this.unreadCount = MessageMockData.unreadCount;
                    this.unreadCountByType = { ...MessageMockData.unreadCountByType };
                    return;
                }
                
                const count = await MessageApi.getUnreadCount() as number;
                this.unreadCount = count;
                
                const countByType = await MessageApi.getUnreadCountByType() as Record<number, number>;
                this.unreadCountByType = countByType;
            } catch (error) {
                console.error('获取未读消息数量失败:', error);
                // 使用Mock数据
                this.unreadCount = MessageMockData.unreadCount;
                this.unreadCountByType = { ...MessageMockData.unreadCountByType };
            }
        },
        
        /**
         * 获取最新未读消息（用于下拉预览）
         */
        async fetchLatestMessages(limit: number = 5) {
            try {
                if (useMock) {
                    this.latestMessages = MessageMockData.list
                        .filter(m => m.status === 0)
                        .slice(0, limit);
                    return;
                }
                
                const messages = await MessageApi.getLatestUnread(limit) as MessageItem[];
                this.latestMessages = messages;
            } catch (error) {
                console.error('获取最新消息失败:', error);
                this.latestMessages = MessageMockData.list
                    .filter(m => m.status === 0)
                    .slice(0, limit);
            }
        },
        
        /**
         * 获取消息列表（分页）
         */
        async fetchMessageList(params?: {
            pageNum?: number;
            pageSize?: number;
            type?: number;
            status?: number;
            title?: string;
        }) {
            this.loading = true;
            try {
                const queryParams = {
                    pageNum: params?.pageNum || this.pagination.pageNum,
                    pageSize: params?.pageSize || this.pagination.pageSize,
                    type: params?.type ?? this.currentType ?? undefined,
                    status: params?.status,
                    title: params?.title
                };
                
                if (useMock) {
                    let filteredList = [...MessageMockData.list];
                    if (queryParams.type) {
                        filteredList = filteredList.filter(m => m.type === queryParams.type);
                    }
                    if (queryParams.status !== undefined) {
                        filteredList = filteredList.filter(m => m.status === queryParams.status);
                    }
                    this.messageList = filteredList;
                    this.pagination.total = filteredList.length;
                    return;
                }
                
                const result = await MessageApi.getMessageList(queryParams) as any;
                this.messageList = result.list || [];
                this.pagination.total = result.total || 0;
                this.pagination.pageNum = queryParams.pageNum;
                this.pagination.pageSize = queryParams.pageSize;
            } catch (error) {
                console.error('获取消息列表失败:', error);
                let filteredList = [...MessageMockData.list];
                if (params?.type) {
                    filteredList = filteredList.filter(m => m.type === params.type);
                }
                this.messageList = filteredList;
                this.pagination.total = filteredList.length;
            } finally {
                this.loading = false;
            }
        },
        
        /**
         * 标记单条消息已读
         */
        async markAsRead(messageId: number) {
            try {
                if (!useMock) {
                    await MessageApi.markAsRead(messageId);
                }
                
                // 更新本地状态
                const message = this.messageList.find(m => m.id === messageId);
                if (message && message.status === 0) {
                    message.status = 1;
                    message.readTime = new Date().toLocaleString();
                    this.unreadCount = Math.max(0, this.unreadCount - 1);
                    if (this.unreadCountByType[message.type]) {
                        this.unreadCountByType[message.type]--;
                    }
                }
                
                // 更新最新消息列表
                this.latestMessages = this.latestMessages.filter(m => m.id !== messageId);
            } catch (error) {
                console.error('标记已读失败:', error);
            }
        },
        
        /**
         * 批量标记已读
         */
        async batchMarkAsRead(messageIds: number[]) {
            try {
                if (!useMock) {
                    await MessageApi.batchMarkAsRead(messageIds);
                }
                
                // 更新本地状态
                messageIds.forEach(id => {
                    const message = this.messageList.find(m => m.id === id);
                    if (message && message.status === 0) {
                        message.status = 1;
                        message.readTime = new Date().toLocaleString();
                        this.unreadCount = Math.max(0, this.unreadCount - 1);
                        if (this.unreadCountByType[message.type]) {
                            this.unreadCountByType[message.type]--;
                        }
                    }
                });
                
                // 更新最新消息列表
                this.latestMessages = this.latestMessages.filter(m => !messageIds.includes(m.id));
            } catch (error) {
                console.error('批量标记已读失败:', error);
            }
        },
        
        /**
         * 全部标记已读
         */
        async markAllAsRead(type?: number) {
            try {
                if (!useMock) {
                    await MessageApi.markAllAsRead(type);
                }
                
                // 更新本地状态
                this.messageList.forEach(message => {
                    if (message.status === 0 && (!type || message.type === type)) {
                        message.status = 1;
                        message.readTime = new Date().toLocaleString();
                    }
                });
                
                if (type) {
                    this.unreadCount = Math.max(0, this.unreadCount - (this.unreadCountByType[type] || 0));
                    this.unreadCountByType[type] = 0;
                } else {
                    this.unreadCount = 0;
                    Object.keys(this.unreadCountByType).forEach(key => {
                        this.unreadCountByType[Number(key)] = 0;
                    });
                }
                
                // 清空最新消息列表
                if (!type) {
                    this.latestMessages = [];
                } else {
                    this.latestMessages = this.latestMessages.filter(m => m.type !== type);
                }
            } catch (error) {
                console.error('全部标记已读失败:', error);
            }
        },
        
        /**
         * 删除消息
         */
        async deleteMessage(messageId: number) {
            try {
                if (!useMock) {
                    await MessageApi.deleteMessage(messageId);
                }
                
                // 从列表中移除
                const index = this.messageList.findIndex(m => m.id === messageId);
                if (index > -1) {
                    const message = this.messageList[index];
                    if (message.status === 0) {
                        this.unreadCount = Math.max(0, this.unreadCount - 1);
                        if (this.unreadCountByType[message.type]) {
                            this.unreadCountByType[message.type]--;
                        }
                    }
                    this.messageList.splice(index, 1);
                    this.pagination.total--;
                }
                
                // 从最新消息列表中移除
                this.latestMessages = this.latestMessages.filter(m => m.id !== messageId);
            } catch (error) {
                console.error('删除消息失败:', error);
            }
        },
        
        /**
         * 批量删除消息
         */
        async batchDeleteMessage(messageIds: number[]) {
            try {
                if (!useMock) {
                    await MessageApi.batchDeleteMessage(messageIds);
                }
                
                // 从列表中移除
                messageIds.forEach(id => {
                    const index = this.messageList.findIndex(m => m.id === id);
                    if (index > -1) {
                        const message = this.messageList[index];
                        if (message.status === 0) {
                            this.unreadCount = Math.max(0, this.unreadCount - 1);
                            if (this.unreadCountByType[message.type]) {
                                this.unreadCountByType[message.type]--;
                            }
                        }
                        this.messageList.splice(index, 1);
                        this.pagination.total--;
                    }
                });
                
                // 从最新消息列表中移除
                this.latestMessages = this.latestMessages.filter(m => !messageIds.includes(m.id));
            } catch (error) {
                console.error('批量删除消息失败:', error);
            }
        },
        
        /**
         * 设置当前筛选类型
         */
        setCurrentType(type: number | null) {
            this.currentType = type;
        },
        
        /**
         * 启动轮询（定时获取未读消息数量）
         * 注意：Mock模式下不启动轮询
         */
        startPolling(interval: number = 60000) {
            if (useMock) {
                // Mock模式下不需要轮询
                return;
            }
            this.stopPolling();
            this.fetchUnreadCount();
            this.pollingTimer = setInterval(() => {
                this.fetchUnreadCount();
            }, interval);
        },
        
        /**
         * 停止轮询
         */
        stopPolling() {
            if (this.pollingTimer) {
                clearInterval(this.pollingTimer);
                this.pollingTimer = null;
            }
        },
        
        /**
         * 初始化（登录后调用）
         */
        async init() {
            await this.fetchUnreadCount();
            await this.fetchLatestMessages();
            this.startPolling();
        },
        
        /**
         * 清理（登出时调用）
         */
        cleanup() {
            this.stopPolling();
            this.unreadCount = 0;
            this.unreadCountByType = { 1: 0, 2: 0, 3: 0, 4: 0 };
            this.latestMessages = [];
            this.messageList = [];
        }
    }
});