/**
 * console-mode.js - 共享模式/目标切换胶水代码（从 index.html 内联脚本抽取）
 *
 * 职责：
 * - 覆盖 app.js 中的 switchStageFlow，支持 BLE 阶段流程
 * - 提供 setConsoleMode / selectFlashTarget 等供 HTML onclick 调用
 * - 维护共享固件文件状态 (sharedFirmwareFiles) 并在 WiFi/BLE 间同步
 *
 * 依赖：app.js (通过 window.* 或 bare 引用) 提供 switchStageFlow、
 * handleFileSelect、clearFile、pickFileViaFSAPI、addLog、showToast、setActivePhase 等。
 */
window.connectionMode = window.connectionMode || 'wifi';
window.flashTarget = window.flashTarget || 'esp32';
window.sharedFirmwareFiles = window.sharedFirmwareFiles || {
  esp32: { file: null, handle: null },
  gd32: { file: null, handle: null }
};
(function () {
  var originalSwitchStageFlow = window.switchStageFlow;
  window.switchStageFlow = function (target) {
    if (target === 'ble') {
      window.currentOtaTarget = 'ble';
      var esp32El = document.getElementById('esp32Stages');
      var gd32El = document.getElementById('gd32Stages');
      var bleEl = document.getElementById('bleStages');
      if (esp32El) esp32El.style.display = 'none';
      if (gd32El) gd32El.style.display = 'none';
      if (bleEl) bleEl.style.display = '';
      return;
    }
    if (typeof originalSwitchStageFlow === 'function') {
      originalSwitchStageFlow(target);
    }
    var bleEl = document.getElementById('bleStages');
    if (bleEl) bleEl.style.display = 'none';
  };

  window.setConsoleMode = function (mode) {
      // ★ 刷写进行中禁止切换连接模式：setConsoleMode → syncBleFileFromSelectedTarget →
      //   notifyFileChange → updateFileInfo → finalizeFileInfo → setProgress(0) 会覆盖
      //   进行中的 WiFi/BLE 上传进度（与 selectFlashTarget 同样的守卫策略）。
      var bleBusy = window.bleOta && window.bleOta.isUploading && window.bleOta.isUploading();
      if (window.isUploading || bleBusy) {
        var active = bleBusy ? 'BLE' : ((window.activeUploadChip || 'OTA').toUpperCase());
        if (typeof addLog === 'function') addLog('W', 'OTA', active + ' 刷写进行中，无法切换连接模式');
        if (typeof showToast === 'function') showToast('当前有 ' + active + ' 任务在运行，请等待结束后再切换', 'error');
        return;
      }
    var isBle = mode === 'ble';
    window.connectionMode = isBle ? 'ble' : 'wifi';
    var wifiCards = document.getElementById('wifiModeCards');
    var bleCards = document.getElementById('bleModeCards');
    var wifiBtn = document.getElementById('modeWifiBtn');
    var bleBtn = document.getElementById('modeBleBtn');
    if (wifiCards) wifiCards.style.display = isBle ? 'none' : '';
    if (bleCards) bleCards.style.display = isBle ? '' : 'none';
    var headBtns = document.getElementById('bleHeadActions');
    if (headBtns) headBtns.style.display = isBle ? '' : 'none';
    if (wifiBtn) wifiBtn.className = isBle ? 'btn btn-outline' : 'btn btn-primary';
    if (bleBtn) bleBtn.className = isBle ? 'btn btn-primary' : 'btn btn-outline';
    applySharedModeUi();
    syncBleFileFromSelectedTarget();
    if (isBle) {
      window.switchStageFlow('ble');
      if (typeof setActivePhase === 'function') {
        setActivePhase(window.flashTarget === 'gd32' ? 'gd32Ota' : 'esp32Ota');
      }
      if (window.bleOta && typeof window.bleOta.refreshButtons === 'function') {
        window.bleOta.refreshButtons();
      }
    } else {
      window.switchStageFlow(window.flashTarget || (window.activePhase === 'esp32Ota' ? 'esp32' : 'gd32'));
    }
  };

  window.selectFlashTarget = function (target) {
      // OTA 上传进行中禁止切换目标：避免前端状态与后端 relay/upload 不同步导致卡死
      // ★ 兼容 BLE 模式：BLE 上传用 bleOta.state.uploading，window.isUploading 仅 WiFi 通道使用。
      var bleBusy = window.bleOta && window.bleOta.isUploading && window.bleOta.isUploading();
      if (window.isUploading || bleBusy) {
        var active = bleBusy ? 'BLE' : ((window.activeUploadChip || 'OTA').toUpperCase());
        if (typeof addLog === 'function') addLog('W', 'OTA', active + ' 刷写进行中，无法切换目标');
        if (typeof showToast === 'function') showToast('当前有 ' + active + ' 任务在运行，请等待结束后再切换', 'error');
        return;
      }
    window.flashTarget = target === 'gd32' ? 'gd32' : 'esp32';
    applySharedModeUi();
    syncBleFileFromSelectedTarget();
    if (window.connectionMode === 'ble') {
      window.switchStageFlow('ble');
      if (typeof setActivePhase === 'function') {
        setActivePhase(target === 'gd32' ? 'gd32Ota' : 'esp32Ota');
      }
    } else {
      window.switchStageFlow(window.flashTarget);
    }
    if (window.bleOta && typeof window.bleOta.refreshTargetUi === 'function') {
      window.bleOta.refreshTargetUi();
    }
  };

  window.handleSharedFileSelect = function (event, chip) {
    var file = event && event.target && event.target.files && event.target.files[0] ? event.target.files[0] : null;
    if (file) {
      window.sharedFirmwareFiles[chip] = { file: file, handle: null };
    }
    if (typeof window.handleFileSelect === 'function') {
      window.handleFileSelect(event, chip);
    }
    window.flashTarget = chip === 'gd32' ? 'gd32' : 'esp32';
    applySharedModeUi();
    setTimeout(syncBleFileFromSelectedTarget, 0);
  };

  window.pickSharedFirmware = function (chip) {
    window.flashTarget = chip === 'gd32' ? 'gd32' : 'esp32';
    applySharedModeUi();
    if (window.showOpenFilePicker && typeof window.pickFileViaFSAPI === 'function') {
      var nativePicker = window.showOpenFilePicker;
      var capturedHandle = null;
      window.showOpenFilePicker = function () {
        return nativePicker.apply(this, arguments).then(function (handles) {
          capturedHandle = handles && handles.length ? handles[0] : null;
          return handles;
        });
      };
      Promise.resolve(window.pickFileViaFSAPI(chip)).then(function () {
        window.showOpenFilePicker = nativePicker;
        if (!capturedHandle || typeof capturedHandle.getFile !== 'function') {
          syncBleFileFromSelectedTarget();
          return;
        }
        capturedHandle.getFile().then(function (file) {
          window.sharedFirmwareFiles[chip] = { file: file, handle: capturedHandle };
          syncBleFileFromSelectedTarget();
        }).catch(function () {
          syncBleFileFromSelectedTarget();
        });
      }).catch(function (err) {
        window.showOpenFilePicker = nativePicker;
        if (err && err.name !== 'AbortError' && typeof window.addLog === 'function') {
          window.addLog('W', '文件', 'FSAPI 选择失败: ' + err.message);
        }
      });
    } else {
      var input = document.getElementById(chip === 'gd32' ? 'fileInputGd32' : 'fileInputEsp32');
      if (input) input.click();
    }
  };

  window.clearSharedFirmware = function (chip) {
    window.sharedFirmwareFiles[chip] = { file: null, handle: null };
    if (typeof window.clearFile === 'function') {
      window.clearFile(chip);
    }
    if (window.connectionMode === 'ble' && window.flashTarget === chip && window.bleOta && typeof window.bleOta.clearFile === 'function') {
      window.bleOta.clearFile();
    }
  };

  window.setBleFirmwareInputFile = function (file) {
    var input = document.getElementById('firmwareFile');
    if (!input || !file || typeof window.DataTransfer !== 'function') {
      return;
    }
    try {
      var dt = new DataTransfer();
      dt.items.add(file);
      input.files = dt.files;
    } catch (err) {
      // Some browsers restrict assignment to file inputs; BLE state is still synced via notifyFileChange.
    }
  };

  window.syncBleFileFromSelectedTarget = function () {
    if (window.connectionMode !== 'ble' || !window.bleOta || typeof window.bleOta.notifyFileChange !== 'function') {
      return;
    }
    var isGd32 = window.flashTarget === 'gd32';
    var chip = isGd32 ? 'gd32' : 'esp32';
    var suffix = isGd32 ? 'Gd32' : 'Esp32';
    var stored = window.sharedFirmwareFiles[chip];
    if (stored && stored.handle && typeof stored.handle.getFile === 'function') {
      stored.handle.getFile().then(function (file) {
        stored.file = file;
        setBleFirmwareInputFile(file);
        window.bleOta.notifyFileChange(file, stored.handle);
      }).catch(function () {
        if (stored.file) {
          setBleFirmwareInputFile(stored.file);
          window.bleOta.notifyFileChange(stored.file, stored.handle);
        }
      });
      return;
    }
    if (stored && stored.file) {
      setBleFirmwareInputFile(stored.file);
      window.bleOta.notifyFileChange(stored.file, stored.handle || null);
      return;
    }
    var input = document.getElementById('fileInput' + suffix);
    var info = document.getElementById('fileInfo' + suffix);
    var hasInfo = info && info.classList.contains('show');
    var file = input && input.files && input.files[0] ? input.files[0] : null;
    if (file) {
      window.sharedFirmwareFiles[chip] = { file: file, handle: null };
      setBleFirmwareInputFile(file);
      window.bleOta.notifyFileChange(file, null);
      return;
    }
    if (!hasInfo) {
      return;
    }
    var nameEl = document.getElementById('fileName' + suffix);
    var typeEl = document.getElementById('fileType' + suffix);
    var sizeEl = document.getElementById('fileSize' + suffix);
    var bleInfo = document.getElementById('fileInfo');
    var bleName = document.getElementById('fileName');
    var bleType = document.getElementById('fileType');
    var bleSize = document.getElementById('fileSize');
    if (bleInfo) bleInfo.classList.add('show');
    if (bleName && nameEl) bleName.textContent = nameEl.textContent;
    if (bleType && typeEl) bleType.textContent = typeEl.textContent;
    if (bleSize && sizeEl) bleSize.textContent = sizeEl.textContent;
    var packetCount = document.getElementById('packetCount');
    var sentCount = document.getElementById('sentCount');
    if (packetCount) packetCount.textContent = '-';
    if (sentCount) sentCount.textContent = '0';
  };

  window.applySharedModeUi = function () {
    var isBle = window.connectionMode === 'ble';
    var isGd32 = window.flashTarget === 'gd32';
    var targetEsp32 = document.getElementById('targetEsp32Tab');
    var targetGd32 = document.getElementById('targetGd32Tab');
    if (targetEsp32) targetEsp32.className = isGd32 ? 'btn btn-outline' : 'btn btn-primary';
    if (targetGd32) targetGd32.className = isGd32 ? 'btn btn-primary' : 'btn btn-outline';
    var ids = {
      wifiEsp32UploadPane: !isGd32,
      wifiGd32UploadPane: isGd32,
      bleUploadPane: false,
      wifiEsp32ActionPane: !isBle && !isGd32,
      wifiGd32ActionPane: !isBle && isGd32,
      bleActionPane: isBle
    };
    Object.keys(ids).forEach(function (id) {
      var el = document.getElementById(id);
      if (el) el.style.display = ids[id] ? '' : 'none';
    });
    var hint = document.getElementById('readyHint');
    if (hint) {
      if (isBle) {
        hint.innerHTML = 'BLE 模式：连接设备 → 选择固件 → 一键刷写。';
      } else if (isGd32) {
        hint.innerHTML = 'WiFi 模式：上传 GD32 固件后自动执行 SPI OTA。';
      } else {
        hint.innerHTML = 'WiFi 模式：上传 ESP32 固件后自动执行 OTA 并重启。';
      }
    }
  };

  applySharedModeUi();
})();

// 暴露给 HTML onclick 调用的函数（ES Module 迁移：模块作用域不再自动成为全局变量）
window.setConsoleMode = setConsoleMode;
window.selectFlashTarget = selectFlashTarget;
window.handleSharedFileSelect = handleSharedFileSelect;
window.pickSharedFirmware = pickSharedFirmware;
window.clearSharedFirmware = clearSharedFirmware;
window.setBleFirmwareInputFile = setBleFirmwareInputFile;
window.syncBleFileFromSelectedTarget = syncBleFileFromSelectedTarget;
window.applySharedModeUi = applySharedModeUi;