/**
 * app.js - ESP32 OTA 中继控制台入口（WiFi OTA 通道）
 *
 * 薄入口：import 所有 ota/* + common/* 模块，将 HTML onclick 引用的函数
 * 显式挂载到 window 对象，保留原有内联事件处理器兼容。
 *
 * 模块通过 window.* 共享状态，模块间依赖通过 import 解耦。
 * 此入口只负责挂载 + 顶层副作用（拖拽区绑定、SPI 输入监听、启动轮询）。
 */
import { formatBytes, formatTime, formatUptime, escapeHtml } from './common/utils.js';
import { showToast } from './common/toast.js';
import { addLog, clearLogs, setLogFilter, toggleAutoScroll } from './common/log.js';
import {
  updateConnectionUi, updateHealthUi, updateHeapAndTaskStatusUi,
  testConnection, refreshSystemStatusNow, diagnoseNetwork, systemStatusUrl
} from './common/connection.js';
import {
  scheduleStatusPoll, startPolling, pausePollingForUpload,
  resumePollingAfterUpload, pollStatus, pollLogs, setStatusPollIntervalMs
} from './common/polling.js';

import {
  OtaSessionState, otaSessionState, otaSessionTarget, otaFailReason,
  otaSessionActive, otaSessionTerminated, otaSessionTransition,
  otaSessionReset, clearOtaSessionResiduals,
  stopUploadWaitHeartbeat, startUploadWaitHeartbeat
} from './ota/session.js';
import {
  toggleCollapse, switchStageFlow, updateEsp32StagesFromPhase,
  updateEsp32StagesError, cleanupAfterOtaFailure, setActivePhase,
  markPhaseDone, setProgress, resetProgress, esp32PhaseLabels
} from './ota/progress.js';
import {
  updateStagesFromRelayState, updateSystemStatusUi
} from './ota/stages.js';
import {
  handleFileSelect, pickFileViaFSAPI, setupDropZone,
  parseIntelHex, isIntelHexText, convertHexFileToBin,
  processFile, clearFile, resumePersistedFirmwareWithGesture
} from './ota/file-handle.js';
import { startUpload, verifyEsp32Firmware, restartEsp32 } from './ota/upload-esp32.js';
import {
  triggerGd32Relay, markGd32OtaUiComplete, stopRelayProgressWatch,
  startRelayProgressWatch, emitRelayProgress, ensureRelayProgressComplete
} from './ota/upload-gd32.js';

// ==================== 工具函数 ====================
function formatPercent(value) {
  if (!Number.isFinite(value)) return '--';
  return value.toFixed(1).replace(/\.0$/, '') + '%';
}
function getEspIp() {
  var el = document.getElementById('espIp');
  var ip = el && el.value ? el.value.trim() : '';
  if (!ip) {
    try { ip = (localStorage.getItem('dcu_esp_ip') || '').trim(); } catch (_) {}
  }
  if (!ip) ip = '192.168.31.127';
  try { localStorage.setItem('dcu_esp_ip', ip); } catch (_) {}
  return ip;
}
function getBaseUrl() {
  return 'http://' + getEspIp();
}
function updateUploadButtonLabel() {
  var esp32Btn = document.getElementById('uploadEsp32Btn');
  var gd32Btn = document.getElementById('uploadGd32Btn');
  /* 仅 XHR 上传期禁用（isUploading）。校验/中继/重启期允许按钮恢复可点，
   * startUpload 用 otaSessionActive() 拒绝并发会话。 */
  var xhrBusy = !!window.isUploading;
  if (esp32Btn) esp32Btn.disabled = !window.esp32File || xhrBusy;
  if (gd32Btn) gd32Btn.disabled = !window.gd32File || xhrBusy;
}
function resetStageFlow() {
  ['s1', 's2', 's3', 's4', 's5', 's6'].forEach(function (id) {
    var el = document.getElementById(id);
    if (el) el.className = 'stage-node';
  });
  ['sd1', 'sd2', 'sd3', 'sd4', 'sd5', 'sd6'].forEach(function (id) {
    var el = document.getElementById(id);
    if (el) el.textContent = '';
  });
  var statusBar = document.getElementById('stageStatusBar');
  if (statusBar) statusBar.className = 'stage-status-bar';
  var statusText = document.getElementById('stageStatusText');
  if (statusText) statusText.textContent = '待机';
}
function applyDisconnectedRuntimeState() {
  document.getElementById('pillIP').textContent = '--';
  document.getElementById('pillRSSI').textContent = '--';
  // ★ 状态机守卫：会话活跃时不重置进度/阶段，避免覆盖进行中的 OTA 进度
  if (otaSessionActive()) return;
  // FAILED 态：保留失败进度显示，只清连接胶囊（让用户看到失败原因）
  if (otaSessionState === OtaSessionState.FAILED) return;
  resetProgress();
  resetStageFlow();
}
function applyRebootingRuntimeState() {
  var pc = document.getElementById('pillConn');
  var pct = document.getElementById('pillConnTxt');
  if (pc) pc.className = 'pill processing';
  if (pct) {
    var elapsed = Math.round((Date.now() - window.rebootStartTime) / 1000);
    pct.textContent = '重启中 ' + elapsed + 's';
  }
  var bc = document.getElementById('bConn');
  if (bc) bc.textContent = '重启中';
  if (bc) bc.className = 'v warn';
}
function applyUploadingRuntimeState() {
  // ★ 状态机守卫：会话已失败/完成时，绝不重新应用"上传中"运行时态，
  //   防止网络抖动后的轮询错误分支把 UI 拉回"上传中"。
  if (otaSessionState === OtaSessionState.FAILED ||
      otaSessionState === OtaSessionState.DONE) {
    return;
  }
  var pc = document.getElementById('pillConn');
  var pct = document.getElementById('pillConnTxt');
  if (pc) pc.className = 'pill processing';
  if (pct) pct.textContent = '上传中';
  var bc = document.getElementById('bConn');
  if (bc) bc.textContent = '上传中';
  if (bc) bc.className = 'v warn';
}
/** 设备忙：只更新顶栏连接胶囊 + 系统状态徽章，不写下方重复文案。 */
function applyDeviceBusyRuntimeState(pillText, statusText, badgeText) {
  var pc = document.getElementById('pillConn');
  var pct = document.getElementById('pillConnTxt');
  if (pc) pc.className = 'pill processing';
  if (pct) pct.textContent = pillText || '设备忙';
  var bc = document.getElementById('bConn');
  if (bc) bc.textContent = badgeText || '设备忙';
  if (bc) bc.className = 'v warn';
}

// ==================== 挂载 ota/* 函数到 window（供其他模块通过 window.* 调用） ====================
window.OtaSessionState = OtaSessionState;
window.otaSessionActive = otaSessionActive;
window.otaSessionTerminated = otaSessionTerminated;
window.otaSessionTransition = otaSessionTransition;
window.otaSessionReset = otaSessionReset;
window.clearOtaSessionResiduals = clearOtaSessionResiduals;
window.stopUploadWaitHeartbeat = stopUploadWaitHeartbeat;
window.startUploadWaitHeartbeat = startUploadWaitHeartbeat;

window.toggleCollapse = toggleCollapse;
window.switchStageFlow = switchStageFlow;
window.updateEsp32StagesFromPhase = updateEsp32StagesFromPhase;
window.updateEsp32StagesError = updateEsp32StagesError;
window.cleanupAfterOtaFailure = cleanupAfterOtaFailure;
window.setActivePhase = setActivePhase;
window.markPhaseDone = markPhaseDone;
window.setProgress = setProgress;
window.resetProgress = resetProgress;

window.updateStagesFromRelayState = updateStagesFromRelayState;
window.updateSystemStatusUi = updateSystemStatusUi;

window.handleFileSelect = handleFileSelect;
window.pickFileViaFSAPI = pickFileViaFSAPI;
window.resumePersistedFirmwareWithGesture = resumePersistedFirmwareWithGesture;
window.parseIntelHex = parseIntelHex;
window.isIntelHexText = isIntelHexText;
window.convertHexFileToBin = convertHexFileToBin;
window.processFile = processFile;
window.clearFile = clearFile;

window.startUpload = startUpload;
window.verifyEsp32Firmware = verifyEsp32Firmware;
window.restartEsp32 = restartEsp32;

window.triggerGd32Relay = triggerGd32Relay;
window.markGd32OtaUiComplete = markGd32OtaUiComplete;
window.stopRelayProgressWatch = stopRelayProgressWatch;
window.startRelayProgressWatch = startRelayProgressWatch;
window.emitRelayProgress = emitRelayProgress;
window.ensureRelayProgressComplete = ensureRelayProgressComplete;

// ==================== 挂载 common/* 函数到 window（供 polling.js 等通过 window.* 调用） ====================
window.formatBytes = formatBytes;
window.formatTime = formatTime;
window.formatUptime = formatUptime;
window.escapeHtml = escapeHtml;
window.formatPercent = formatPercent;
window.showToast = showToast;
window.addLog = addLog;
window.clearLogs = clearLogs;
window.setLogFilter = setLogFilter;
window.toggleAutoScroll = toggleAutoScroll;
window.updateConnectionUi = updateConnectionUi;
window.updateHealthUi = updateHealthUi;
window.updateHeapAndTaskStatusUi = updateHeapAndTaskStatusUi;
window.testConnection = testConnection;
window.refreshSystemStatusNow = refreshSystemStatusNow;
window.systemStatusUrl = systemStatusUrl;
window.scheduleStatusPoll = scheduleStatusPoll;
window.setStatusPollIntervalMs = setStatusPollIntervalMs;
window.startPolling = startPolling;
window.pausePollingForUpload = pausePollingForUpload;
window.resumePollingAfterUpload = resumePollingAfterUpload;
window.pollStatus = pollStatus;
window.pollLogs = pollLogs;
window.diagnoseNetwork = diagnoseNetwork;

// ==================== 挂载本入口的辅助函数到 window ====================
window.getEspIp = getEspIp;
window.getBaseUrl = getBaseUrl;
window.updateUploadButtonLabel = updateUploadButtonLabel;
window.resetStageFlow = resetStageFlow;
window.applyDisconnectedRuntimeState = applyDisconnectedRuntimeState;
window.applyRebootingRuntimeState = applyRebootingRuntimeState;
window.applyUploadingRuntimeState = applyUploadingRuntimeState;
window.applyDeviceBusyRuntimeState = applyDeviceBusyRuntimeState;

// ==================== data-action 事件委托（替代 HTML 内联 onclick） ====================
// 处理函数分散在 app.js / ota/console-mode.js / ble_ota.js 三个入口，均挂载在
// window 上；委托在点击时才解引用，天然规避模块加载顺序问题。
document.addEventListener('click', function (ev) {
  var target = ev.target.closest('[data-action]');
  if (!target) return;
  var arg = target.getAttribute('data-arg');
  switch (target.getAttribute('data-action')) {
    case 'set-console-mode': if (window.setConsoleMode) window.setConsoleMode(arg); break;
    case 'test-connection': testConnection(); break;
    case 'select-flash-target': if (window.selectFlashTarget) window.selectFlashTarget(arg); break;
    case 'pick-shared-firmware': if (window.pickSharedFirmware) window.pickSharedFirmware(arg); break;
    case 'clear-shared-firmware': if (window.clearSharedFirmware) window.clearSharedFirmware(arg); break;
    case 'ble-pick-file': var fi = document.getElementById('firmwareFile'); if (fi) fi.click(); break;
    case 'ble-clear-file': if (window.bleOta) window.bleOta.clearFile(); break;
    case 'start-upload': startUpload(arg); break;
    case 'restart-esp32': restartEsp32(); break;
    case 'refresh-system-status': refreshSystemStatusNow(ev); break;
  }
});

// 共享固件文件选择（原内联 onchange="handleSharedFileSelect(event, chip)"）
['esp32', 'gd32'].forEach(function (chip) {
  var input = document.getElementById(chip === 'esp32' ? 'fileInputEsp32' : 'fileInputGd32');
  if (input) {
    input.addEventListener('change', function (ev) {
      if (window.handleSharedFileSelect) window.handleSharedFileSelect(ev, chip);
    });
  }
});

// BLE 上传区拖拽（原内联 ondragover/ondragleave/ondrop）
var bleZone = document.getElementById('uploadZone');
if (bleZone) {
  bleZone.addEventListener('dragover', function (ev) {
    ev.preventDefault();
    bleZone.classList.add('dragover');
  });
  bleZone.addEventListener('dragleave', function () {
    bleZone.classList.remove('dragover');
  });
  bleZone.addEventListener('drop', function (ev) {
    ev.preventDefault();
    bleZone.classList.remove('dragover');
    var f = ev.dataTransfer.files[0];
    if (f && window.bleOta) window.bleOta.notifyFileChange(f, null);
  });
}

// ==================== 顶层副作用（原 app.js 末尾的初始化） ====================
setupDropZone('uploadZoneEsp32', 'esp32');
setupDropZone('uploadZoneGd32', 'gd32');

// 启动轮询（必须在所有模块加载完成、window.OtaSessionState 已挂载后调用，
//   否则 polling.js 的 scheduleStatusPoll 会因 window.OtaSessionState 未定义而抛 TypeError）
startPolling();

// IP 输入变化时清零失败计数并立即刷新状态
var ipInput = document.getElementById('espIp');
if (ipInput) {
  try {
    var savedIp = localStorage.getItem('dcu_esp_ip');
    if (savedIp && savedIp.trim()) ipInput.value = savedIp.trim();
  } catch (_) {}
  ipInput.addEventListener('change', function () {
    try { localStorage.setItem('dcu_esp_ip', ipInput.value.trim() || '192.168.31.127'); } catch (_) {}
    window.consecutivePollFailures = 0;
    addLog('I', '系统', 'IP 已修改，重新启动轮询...');
    if (!window.statusPollInFlight) {
      scheduleStatusPoll(0);
    }
  });
}

// 初始化按钮状态与提示
setTimeout(function () {
  updateUploadButtonLabel();
  addLog('I', '系统', '控制台初始化完成，等待固件文件...');
}, 500);