const SJZ_GOV = { lng: 116.21693, lat: 39.90446 }; // 石景山区演示落点（可后续替换更精确POI）

function randn() {
  // 简单正态近似
  let u = 0, v = 0;
  while (u === 0) u = Math.random();
  while (v === 0) v = Math.random();
  return Math.sqrt(-2.0 * Math.log(u)) * Math.cos(2.0 * Math.PI * v);
}

export function makePoints(n = 200) {
  // 做“带簇”的分布，更像真实路口
  const clusters = [
    { dx: 0.00, dy: 0.00, w: 0.45 },
    { dx: 0.03, dy: 0.01, w: 0.25 },
    { dx: -0.02, dy: 0.02, w: 0.18 },
    { dx: 0.01, dy: -0.03, w: 0.12 },
  ];

  function pickCluster() {
    const r = Math.random();
    let acc = 0;
    for (const c of clusters) { acc += c.w; if (r <= acc) return c; }
    return clusters[0];
  }

  const pts = [];
  for (let i = 0; i < n; i++) {
    const c = pickCluster();
    const lng = SJZ_GOV.lng + c.dx + randn() * 0.008;
    const lat = SJZ_GOV.lat + c.dy + randn() * 0.006;
    const statusRoll = Math.random();
    const status = statusRoll < 0.78 ? "normal" : (statusRoll < 0.92 ? "busy" : "alarm");

    pts.push({
      id: `JUNC_${String(i + 1).padStart(3, "0")}`,
      name: `路口-${i + 1}`,
      lng: Number(lng.toFixed(6)),
      lat: Number(lat.toFixed(6)),
      status,
      updatedAt: Date.now() - Math.floor(Math.random() * 120000),
    });
  }
  return pts;
}

// ====== 干路监控 mock 数据 ======

// 模拟 API 请求获取树形数据
export function menuData(tabId) {
  return new Promise(resolve => {
    // 模拟网络延迟 500ms
    setTimeout(() => {
      if (tabId === 'arterial') {
        resolve([
          {
            id: 'm1', label: '主控中心', isOpen: true,
            children: [
              {
                id: 'm1-1', label: '北京市交警总队', isOpen: true,
                children: [
                  {
                    id: 'c1', label: '石景山区', isOpen: true,
                    children: [
                      { id: 'l1', label: 'xxx 绿波带1' },
                      { id: 'l2', label: 'xxx 绿波带2' },
                      { id: 'l3', label: 'xxx 绿波带3' },
                      { id: 'l4', label: 'xxx 绿波带4' }
                    ]
                  },
                  {
                    id: 'c2', label: '丰台区', isOpen: false,
                    children: [{ id: 'l5', label: '丰台绿波带1' }]
                  },
                  {
                    id: 'c3', label: '门头沟区', isOpen: false,
                    children: [{ id: 'l6', label: '门头沟绿波带1' }]
                  },
                  {
                    id: 'c4', label: '石景山区', isOpen: true,
                    children: [
                      { id: 'l1', label: 'xxx 绿波带1' },
                      { id: 'l2', label: 'xxx 绿波带2' },
                      { id: 'l3', label: 'xxx 绿波带3' },
                      { id: 'l4', label: 'xxx 绿波带4' }
                    ]
                  },
                  {
                    id: 'c5', label: '丰台区', isOpen: false,
                    children: [{ id: 'l5', label: '丰台绿波带1' }]
                  },
                  {
                    id: 'c6', label: '门头沟区', isOpen: false,
                    children: [{ id: 'l6', label: '门头沟绿波带1' }]
                  },
                  {
                    id: 'c7', label: '石景山区', isOpen: true,
                    children: [
                      { id: 'l1', label: 'xxx 绿波带1' },
                      { id: 'l2', label: 'xxx 绿波带2' },
                      { id: 'l3', label: 'xxx 绿波带3' },
                      { id: 'l4', label: 'xxx 绿波带4' }
                    ]
                  },
                  {
                    id: 'c8', label: '丰台区', isOpen: false,
                    children: [{ id: 'l5', label: '丰台绿波带1' }]
                  },
                  {
                    id: 'c9', label: '门头沟区', isOpen: false,
                    children: [{ id: 'l6', label: '门头沟绿波带1' }]
                  }

                ]
              }
            ]
          }
        ]);
      } else {
        resolve([
          {
            id: 'other1', label: `${tabId} 控制台`, isOpen: true,
            children: [
              { id: 'o-c1', label: '测试节点 A' },
              { id: 'o-c2', label: '测试节点 B' }
            ]
          }
        ]);
      }
    }, 500);
  });
}

// ====== 交通时序图 mock 数据 ======

const trafficIntersections = [
  '段祺瑞执政府', '剪子巷', '宽街', '北河沿',
  '锣鼓巷', '东板桥胡同', '地安门', '北海后门', '郭沫若故居'
];

const trafficDistances = [0, 300, 600, 900, 1200, 1500, 1800, 2100, 2400];

export function makeTrafficTimeSpaceData(opts = {}) {
  const {
    speed = 15,
    cycle = 120,
    band = 40,
    totalTime = 1800,
    maxDistance = 2400,
    dists = trafficDistances
  } = opts;

  const waveData = [];
  const greenData = [];

  for (let t = 0; t <= totalTime; t += cycle) {
    const downStart = t + cycle / 2;

    waveData.push({
      yBottom: 0, yTop: maxDistance,
      xBL: t, xBR: t + band,
      xTL: t + maxDistance / speed, xTR: t + maxDistance / speed + band,
      label: Math.round(speed * 3.6) + 'km/h', direction: 'up'
    });

    waveData.push({
      yBottom: maxDistance, yTop: 0,
      xBL: downStart, xBR: downStart + band,
      xTL: downStart + maxDistance / speed, xTR: downStart + maxDistance / speed + band,
      label: Math.round(speed * 0.9 * 3.6) + 'km/h', direction: 'down'
    });

    dists.forEach(y => {
      greenData.push({ y, start: t + y / speed, end: t + y / speed + band });
      greenData.push({ y, start: downStart + (maxDistance - y) / speed, end: downStart + (maxDistance - y) / speed + band });
    });
  }

  return {
    intersections: trafficIntersections,
    distances: trafficDistances,
    waveData,
    greenData
  };
}


/**
 * 模拟获取交通配时方案数据的 API 请求
 */
export function fetchSignalTimingData(id) {
  console.log('id', id);
  return new Promise((resolve) => {
    // 模拟 500ms 的网络请求延迟
    setTimeout(() => {
      resolve({
        code: 200,
        message: 'success',
        data: {
          cycleLength: 140,
          currentTime: 67,
          // [轨道(1上,0下), 开始时间, 结束时间, 相位名称, 时长, 颜色类型, 图标类型]
          phaseData: [
            // 单轨道 P1-P4
            [0, 0, 27, 'P1', 27, 'green', 'UP'],
            [0, 27, 30, '', null, 'stripe', null],
            [0, 30, 32, '', null, 'yellow', null],
            [0, 32, 35, '', null, 'red', null],
            [0, 35, 62, 'P2', 27, 'green', 'TURN_LEFT'],
            [0, 62, 65, '', null, 'stripe', null],
            [0, 65, 67, '', null, 'yellow', null],
            [0, 67, 70, '', null, 'red', null],
            [0, 70, 97, 'P3', 27, 'green', 'DOWN'],
            [0, 97, 100, '', null, 'stripe', null],
            [0, 100, 102, '', null, 'yellow', null],
            [0, 102, 105, '', null, 'red', null],
            [0, 105, 132, 'P4', 27, 'green', 'TURN_RIGHT'],
            [0, 132, 135, '', null, 'stripe', null],
            [0, 135, 137, '', null, 'yellow', null],
            [0, 137, 140, '', null, 'red', null],
          ]
        }
      });
    }, 500);
  });
}

/**
 * 模拟获取路口信号相位与流量监控图数据的 API 请求
 */
export function getIntersectionData(id) {
  console.log('id', id);
  return new Promise((resolve) => {
    // 模拟 500ms 的网络延迟
    setTimeout(() => {
      resolve({
        // 信号灯当前相位与倒计时状态
        signals: {
          ns: { phaseName: '相位3', time: 38, isGreen: true },  // 南北向
          ew: { phaseName: '相位7', time: 38, isGreen: false }  // 东西向
        },
        // 交叉路口四个方向的静态配置 (N北, S南, E东, W西)
        armsConfig: {
          N: {
            cameraType: 1, // 1: 枪机, 2: 球机, 0: 无摄像头
            // 车道指示标，从左到右(从中心黄线到路沿)排列。支持: 'U'调头, 'L'左转, 'S'直行, 'R'右转, null无
            lanes: ['U', 'L', 'S', 'R'] 
          },
          S: {
            cameraType: 1,
            lanes: [null, 'L', 'S', 'R'] // 最内侧车道无指示标
          },
          E: {
            cameraType: 2,
            lanes: [null, 'L', 'S', null]
          },
          W: {
            cameraType: 0,
            lanes: ['U', 'L', 'S', null]
          }
        }
      });
    }, 500);
  });
}

// ====== 首页 mock 数据 ======

export function makeHomeData() {
  // 这里做“看起来真”的波动
  const onlineTotal = 1000;
  const online = 960 + Math.floor(Math.random() * 35);
  const offline = onlineTotal - online;

  const alarms = [
    { id: "A001", title: "通讯中断", time: "16:28:28", loc: "中关村大街-科学南路路口", level: "high" },
    { id: "A002", title: "降级黄闪", time: "16:28:28", loc: "中关村大街-科学南路路口", level: "mid" },
    { id: "A003", title: "信号机离线", time: "16:18:02", loc: "阜石路-石景山路路口", level: "mid" },
    { id: "A004", title: "检测器异常", time: "16:11:09", loc: "鲁谷路-政达路路口", level: "low" },
  ];

  const duty = Array.from({ length: 5 }).map((_, idx) => ({
    id: `D${idx + 1}`,
    name: idx === 0 ? "测试" : ["张飞", "关将", "刘备", "孙权"][idx - 1],
    executor: idx === 0 ? "测试" : ["张飞", "关将", "刘备", "孙权"][idx - 1],
    level: idx === 2 ? "二级" : "一级",
    status: idx === 2 ? "进行中" : "未开始",
  }));

  return {
    header: {
      title: "交通信号控制平台",
      timeText: new Date().toLocaleTimeString(),
      dateText: new Date().toLocaleDateString(),
      weatherText: "晴 32/17℃",
    },
    online: { online, offline, total: onlineTotal, rate: Math.round((online / onlineTotal) * 100) },
    alarms,
    duty,
    device: { normal: 998, fault: 0 },
  };
}