const apiEndpoint = '/api/channel/list';
const rowsPerPage = 10;
//算法配置窗口部分控件
const searchEndpoint = '/api/channel/select';
const canvas = document.getElementById('myCanvas');
const ctx = canvas.getContext('2d');
const backgroundCanvas = document.getElementById('backgroundCanvas');
const backgroundCtx = backgroundCanvas.getContext('2d');
const img = new Image();
const tbody = document.getElementById('schedule-body');//布防计划

let currentPage = 1;
let channelData = [];
let channelData_bak = [];
let areaData = ["请选择"];
let currentEditingRow = null;
let cid_schedule = "-1";
let m_polygon = "";
let check_area = 0;
let draw_status = false;    //是否是绘制状态，处于绘制状态才能开始绘制
let b_img = false;      //有没有加载图片成功，如果没有初始化的时候就不绘制线条了。
let points = [];



document.addEventListener('DOMContentLoaded', function () {
      fetchChannelData(); //初始化页面元素数据

      document.getElementById('searchButton').addEventListener('click', function () {
        performSearch();
      });
      //新增通道
      document.getElementById('saveButton').addEventListener('click', function () {
        addChannel(1);
      });
      //修改通道
      document.getElementById('saveButton_cc').addEventListener('click', function () {
        addChannel(2);
      });
      //算法配置
      document.getElementById('cancelButton_mx').addEventListener('click', function () {
        close_mx_model();
      });
      //保存算法配置
      document.getElementById('saveButton_mx').addEventListener('click', function () {
        save_mx_model();
      });
      //开始绘制区域按钮
      document.getElementById('but_hzqy').addEventListener('click', function () {
        startDraw();
      });
});

//添加和修改通道  1--新增，2--修改
function addChannel(itype) {
    let area;
    let cName;
    let Rtsp;
    let cid;
    if(itype ==1){
        const saveButton = document.getElementById('saveButton');
        const CNameInput = document.getElementById('CNameInput');
        const RTSPInput = document.getElementById('RTSPInput');
        area = document.getElementById('areaSelect_M').value;
        cName = CNameInput.value.trim();
        Rtsp = RTSPInput.value.trim();
        cid = -1
    }
    else if(itype ==2){
        const saveButton = document.getElementById('saveButton_cc');
        const CNameInput = document.getElementById('CNameInput_cc');
        const RTSPInput = document.getElementById('RTSPInput_cc');
        area = document.getElementById('areaSelect_CC').value;
        cName = CNameInput.value.trim();
        Rtsp = RTSPInput.value.trim();
        cid = currentEditingRow.cells[0].innerText;
    }

    if(area === "请选择"){
        alert('请选择所属区域');
    }
    else{
        if (cName && Rtsp) {
            saveButton.disabled = true;
            //发送视频链接接口
            const url = '/api/channel/add';
            const data = {"area":area,"cName":cName,"Rtsp":Rtsp,"cid":cid};
            // 发送 POST 请求
            fetch(url, {
                method: 'POST', // 指定请求方法为 POST
                headers: {
                    'Content-Type': 'application/json' // 设置请求头，告诉服务器请求体的数据类型为 JSON
                },
                body: JSON.stringify(data) // 将 JavaScript 对象转换为 JSON 字符串
            })
            .then(response => response.json()) // 将响应解析为 JSON
            .then(data => {
                const istatus = data.status;
                if(istatus === 0){
                    alert(data.msg); // 使用 Modal 显示消息
                    // 启用保存按钮
                    saveButton.disabled = false;
                    return;
                }
                else{
                    // 启用保存按钮
                    saveButton.disabled = false;
                    //刷新列表
                    fetchChannelData();
                    if(itype ==1){
                        //添加通道成功
                        $('#channelModal').modal('hide');
                        alert("添加通道成功！"); // 使用 Modal 显示消息
                    }
                    else if(itype==2){
                        //修改通道成功
                        currentEditingRow = null;
                        $('#ChangeC').modal('hide');
                        alert("修改通道成功！"); // 使用 Modal 显示消息
                    }
                }
            })
            .catch((error) => {
                alert(`Error: ${error.message}`); // 使用 Modal 显示错误信息
                // 启用保存按钮
                saveButton.disabled = false;
                return;
            });
        } else {
            alert('通道名称和RTSP地址不能为空');
        }
    }
}

async function fetchChannelData() { //刷新通道数据
  try {
    const response = await fetch(apiEndpoint);
    channelData = await response.json();
    channelData_bak = channelData;
    renderTable();          //读取通道list接口，刷新表格
    renderPagination();     //刷新分页元素
    renderAreaOptions();    //所属区域下来框
  } catch (error) {
    console.error('Error fetching channel data:', error);
  }
}

//关键字查询数据
async function performSearch() {
  try {
    const area = document.getElementById('areaSelect').value;
    const channelName = document.getElementById('channelNameInput').value;
    if(area === "请选择" && channelName===""){
        channelData  =  channelData_bak;
    }
    else if(area === "请选择"){
        channelData = [];
        channelData_bak.forEach((channel) => {
            if(channelName === channel.channel_name){
                channelData.push(channel);
            }
        });
    }
    else if(channelName === ""){
        channelData = [];
        channelData_bak.forEach((channel) => {
            if(area === channel.area_name){
                channelData.push(channel);
            }
        });
    }
    else{
        channelData = [];
        channelData_bak.forEach((channel) => {
            if(area === channel.area_name && channelName === channel.channel_name){
                channelData.push(channel);
            }
        });
    }
    // 渲染表格和分页控件
    currentPage = 1; // 重置当前页为第一页
    renderTable();
    renderPagination();
  } catch (error) {
    console.error('Error performing search:', error);
  }
}

//刷新表单页面数据
function renderTable() {
  const tableBody = document.getElementById('table-body');
  tableBody.innerHTML = '';

  const start = (currentPage - 1) * rowsPerPage;
  const end = start + rowsPerPage;
  const pageData = channelData.slice(start, end);
  const surplus_count = rowsPerPage - pageData.length;
  let area_name = "";
  pageData.forEach((channel) => {
    if(area_name!==channel.area_name){ //这里要求区域名称一样的要在一起
        area_name = channel.area_name;
        areaData.push(area_name);
    }
    const row = document.createElement('tr');
    row.innerHTML = `
      <td>${channel.ID}</td>
      <td>${channel.area_name}</td>
      <td>${channel.channel_name}</td>
      <td>${channel.ulr}</td>
      <td>${channel.model_name}</td>
      <td>
          <button class="btn btn-primary btn-sm modify-btn">修改</button>
          <button class="btn btn-secondary btn-sm algorithm-btn">算法</button>
          <button class="btn btn-danger btn-sm delete-btn">删除</button>
      </td>
    `;
    tableBody.appendChild(row);
    row.querySelector('.modify-btn').addEventListener('click', () => modifyChannel(row));
    row.querySelector('.algorithm-btn').addEventListener('click', () => configureAlgorithm(row));
    row.querySelector('.delete-btn').addEventListener('click', () => deleteChannel(row));
    });
}

//修改通道信息
function modifyChannel(row) {
//    const cid = row.cells[0].innerText;
    const areaName = row.cells[1].innerText;
    const channelName = row.cells[2].innerText;
    const url = row.cells[3].innerText;

    const area = document.getElementById('areaSelect_CC');
    const CName = document.getElementById('CNameInput_cc');
    const RTSP = document.getElementById('RTSPInput_cc');

    for(let i=0;i< area.options.length;i++){
        if(area.options[i].value === areaName){
            area.options[i].selected = true;
            break;
        }
    }
    CName.value = channelName;
    RTSP.value = url;

    currentEditingRow = row;
    $('#ChangeC').modal('show');
}

//算法配置 -- 点击算法按钮
function configureAlgorithm(row) {
    //获取当前行信息
    currentEditingRow = row;
    const cid = row.cells[0].innerText;
    //清除数据，若需要的话
    ctx.clearRect(0, 0, canvas.width, canvas.height); //清除左侧绘画和画线信息
    tbody.innerHTML = '';   //清空布防控件数据
    points = [];            //清空绘制检测区域
    draw_status = false;
    b_img = false;
    document.getElementById('but_hzqy').textContent = "绘制区域";
    //开始初始化算法管理模块
    show_channel_img(cid);              //显示一帧图片 -- 获取不到图片就是黑画面
    show_channel_model_schedule(cid);   //显示结构化数据
    //显示窗口
    $('#MX_M').modal('show');
}

//获取一帧图片
function show_channel_img(cid){
    const data = {"cid":cid};
    fetch('/api/channel/img', {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json'
        },
        body: JSON.stringify(data)
    })
    .then(response => response.json())
    .then(data => {
        if (data.image) {
            b_img = true;
            img.src = 'data:image/jpeg;base64,' + data.image;
        } else {
            console.error('Error:', data.error);
        }
    })
    .catch(error => console.error('Error:', error));
}

//图片加载事项
img.onload = () => {  //清除、画图和画线应该分开
    // 设置画布宽高
    backgroundCanvas.width = canvas.width = img.width;
    backgroundCanvas.height = canvas.height = img.height;
    // 将图片绘制到背景画布上
    backgroundCtx.drawImage(img, 0, 0, img.width, img.height);
    // 将背景画布的内容复制到前台画布上
    ctx.drawImage(backgroundCanvas, 0, 0, canvas.width, canvas.height);  //绘制画面
};

//开始和重新绘制
function startDraw(){
    if(!document.getElementById('zdjc').checked){
        alert("请先选择指定区域！");
        return;
    }
    let but = document.getElementById('but_hzqy');
    if(!draw_status){//开始绘制
        if(points.length >0){
            if (confirm('开始绘制将清除未提交保存的绘制数据，是否继续？')) {
                draw_status = true;
                points = [];
                //按钮文字调整为结束绘制
                but.textContent = '结 束 绘 制';
                // 清除前台画布
                ctx.clearRect(0, 0, canvas.width, canvas.height);
                // 将背景画布的内容复制到前台画布上
                ctx.drawImage(backgroundCanvas, 0, 0, canvas.width, canvas.height);
            }
        }
        else{
            draw_status = true;
            but.textContent = '结束绘制';
        }
    }
    else{//结束绘制
        draw_status = false;
        but.textContent = '绘制区域';
    }
}

//单选按钮点击事件处理
function handleRadioClick(event) {
    const selectedRadio = event.target;
    console.log('Selected Radio:', selectedRadio.id);
    // 根据选中的单选按钮执行相应操作
    if (selectedRadio.id === 'qjjc') {
        console.log("points.length",points.length);
        // 处理全画面生效的逻辑
        if(points.length>0){
            if (!confirm('已经绘制了检测区域，确认要切换到全画面生效吗？')) {
                document.getElementById('zdjc').checked = true;
            }
        }
        console.log('全画面生效');
    } else if (selectedRadio.id === 'zdjc') {
        // 处理指定区域的逻辑
        console.log('指定区域');
    }
}

// 鼠标点击事件处理--动态绘图
canvas.addEventListener('click', (event) => {
    if(draw_status){
        const rect = canvas.getBoundingClientRect();
        const scaleX = canvas.width / rect.width;
        const scaleY = canvas.height / rect.height;

        // 获取鼠标相对于canvas的位置
        const x = (event.clientX - rect.left) * scaleX;
        const y = (event.clientY - rect.top) * scaleY;

        points.push({ x, y });
        //绘制线条
        drawLines();
    }
});

//初始化读取该视频通道与算法配置的相关信息  --- 这里用GET会更加贴切一些
function show_channel_model_schedule(cid){
    //发送视频链接接口
    const url = '/api/channel/C2M';
    const data = {"cid":cid};
    // 发送 POST 请求
    fetch(url, {
        method: 'POST', // 指定请求方法为 POST
        headers: {
            'Content-Type': 'application/json' // 设置请求头，告诉服务器请求体的数据类型为 JSON
        },
        body: JSON.stringify(data) // 将 JavaScript 对象转换为 JSON 字符串
    })
    .then(response => response.json()) // 将响应解析为 JSON
    .then(data => {
        const m_datas = data.m_datas;
        const c2m_data = data.c2m_data;
        const schedule = data.schedule;
        //console.log("m_datas--",m_datas);
        //console.log("c2m_data--",c2m_data);
        //console.log("schedule--",schedule);
        //配置算法下拉清单
        select_datas = ["请选择"];
        m_datas.forEach(option => {
            select_datas.push(option.model_name);
        });
        set_select_data("model_select",select_datas);
        select_str = currentEditingRow.cells[4].innerText;
        //检测区域
        if(c2m_data.length >0){
            model_id =  c2m_data[0].model_id;
            model_name = currentEditingRow.cells[4].innerText;
            set_select_selct("model_select",model_name);
            check_area = c2m_data[0].check_area
            if( check_area == 0){ //全画面生效
                document.getElementById('qjjc').checked = true;
                m_polygon = "";
            }
            else{//指定区域
                document.getElementById('zdjc').checked = true;
                m_polygon = c2m_data[0].polygon;
                if(m_polygon !== ""){   //指定区域了，一般是会有数据的。
                    const coords = parseCoordStr(m_polygon);
                    points = coords;
                    drawLines();
                }
            }
            console.log("m_polygon",m_polygon);
            //阈值
            document.getElementById('zxyz').value = c2m_data[0].conf_thres
            document.getElementById('iouyz').value = c2m_data[0].iou_thres
        }


        const days = ['一', '二', '三', '四', '五', '六','日'];
        const num_days=['0','1','2','3','4','5','6']
        days.forEach((day, dayIndex) => {
            const row = document.createElement('tr');
            const dayCell = document.createElement('th');
            dayCell.textContent = day;
            row.appendChild(dayCell);
            num_day = num_days[dayIndex]
            for (let hour = 0; hour < 24; hour++) {
                const cell = document.createElement('td');
                if(schedule.length >0){
                    const status = schedule.find(item => item.day === num_day && item.hour === hour);
                    if (status && status.status === 1) {
                        cell.classList.add('blocked');
                    } else {
                        cell.classList.add('allowed');
                    }
                }
                else{
                    cell.classList.add('blocked');
                }
                row.appendChild(cell);

                cell.addEventListener('click', () => {
                    if (cell.classList.contains('blocked')) {
                        cell.classList.remove('blocked');
                        cell.classList.add('allowed');
                        // Update status in the database
                        //updateStatus(day, hour, 0);
                    } else {
                        cell.classList.remove('allowed');
                        cell.classList.add('blocked');
                        // Update status in the database
                        //updateStatus(day, hour, 1);
                    }
                });
            }
            tbody.appendChild(row);
        });
    })
    .catch((error) => {
        alert(`Error: ${error.message}`); // 使用 Modal 显示错误信息
        return;
    });
}

// 将字符串转换为数组
function parseCoordStr(str) {
    return str.match(/\(([^)]+)\)/g).map(pair => {
        const [x, y] = pair.replace(/[()]/g, '').split(',').map(Number);
        return { x, y };
    });
}

// 绘制区域，各点连接
function drawLines() {
    if(b_img){
        // 清除前台画布
        ctx.clearRect(0, 0, canvas.width, canvas.height);
        // 将背景画布的内容复制到前台画布上
        ctx.drawImage(backgroundCanvas, 0, 0, canvas.width, canvas.height);

        // 绘制点和线
        ctx.strokeStyle = 'red';
        ctx.lineWidth = 2;

        if (points.length > 0) {
            ctx.beginPath();
            ctx.moveTo(points[0].x, points[0].y);

            for (let i = 1; i < points.length; i++) {
                ctx.lineTo(points[i].x, points[i].y);
            }

            // 连接最后一个点到起点
            ctx.lineTo(points[0].x, points[0].y);
            ctx.stroke();
        }

        points.forEach(point => {
            ctx.beginPath();
            ctx.arc(point.x, point.y, 5, 0, Math.PI * 2);
            ctx.fillStyle = 'red';
            ctx.fill();
        });
    }
}

//关闭算法配置窗口
function close_mx_model(){
    if (confirm('确定退出窗口吗？未保存的修改将丢失！')) {
        $('#MX_M').modal('hide');
    }
}

//保存算法配置窗口数据
function save_mx_model(){
    //?
    currentEditingRow =null;
}

//删除通道
function deleteChannel(row) {
    if (confirm('确定删除此区域吗？')) {
        cid = row.cells[0].innerText;
        //发送视频链接接口
        const url = '/api/channel/del';
        const data = {"cid":cid};
        // 发送 POST 请求
        fetch(url, {
            method: 'POST', // 指定请求方法为 POST
            headers: {
                'Content-Type': 'application/json' // 设置请求头，告诉服务器请求体的数据类型为 JSON
            },
            body: JSON.stringify(data) // 将 JavaScript 对象转换为 JSON 字符串
        })
        .then(response => response.json()) // 将响应解析为 JSON
        .then(data => {
            const istatus = data.status;
            if(istatus === 0){
                alert(data.msg); // 使用 Modal 显示消息
                // 启用保存按钮
                saveButton.disabled = false;
                return;
            }
            else{
                // 启用保存按钮
                saveButton.disabled = false;
                //刷新列表
                row.remove();
                alert("删除通道成功！");
            }
        })
        .catch((error) => {
            alert(`Error: ${error.message}`); // 使用 Modal 显示错误信息
            // 启用保存按钮
            saveButton.disabled = false;
            return;
        });

    }
}

//刷新分页标签
function renderPagination() {
  const pagination = document.getElementById('pagination');
  pagination.innerHTML = '';

  const totalPages = Math.ceil(channelData.length / rowsPerPage);
  for (let i = 1; i <= totalPages; i++) {
    const pageItem = document.createElement('li');
    pageItem.className = 'page-item' + (i === currentPage ? ' active' : '');
    pageItem.innerHTML = `<a class="page-link" href="#">${i}</a>`;
    pageItem.addEventListener('click', (event) => {
      event.preventDefault();
      currentPage = i;
      renderTable();
      renderPagination();
    });
    pagination.appendChild(pageItem);
  }
}

//刷新区域下拉控件
function renderAreaOptions() {
    const areaSelect = document.getElementById('areaSelect');
    const areaSelect_M = document.getElementById('areaSelect_M')
    const areaSelect_CC = document.getElementById('areaSelect_CC')
    areaData.forEach(option => {
      const optionElement = document.createElement('option');
      optionElement.textContent = option;
      areaSelect.appendChild(optionElement);

      const optionElement_m = document.createElement('option');
      optionElement_m.textContent = option;
      areaSelect_M.appendChild(optionElement_m);

      const optionElement_cc = document.createElement('option');
      optionElement_cc.textContent = option;
      areaSelect_CC.appendChild(optionElement_cc);
    });
}