export default {
  namespaced: true,
  state: {
    // 打印机配置对象
    printerConfig: {
      connected: false,           // 是否已连接
      deviceId: '',               // 蓝牙设备ID
      deviceName: '',             // 蓝牙设备名称
      model: '',                  // 打印机型号
      paperWidth: 100,            // 纸张宽度(mm) - 统一默认值
      paperHeight: 100,           // 纸张高度(mm) - 统一默认值
      serviceId: '',              // 蓝牙服务ID
      writeCharId: '',            // 蓝牙特征值ID
      lastUpdated: new Date().toISOString()
    }
  },
  mutations: {
    // 设置打印机配置（合并更新）
    SET_PRINTER_CONFIG(state, config) {
      state.printerConfig = { ...state.printerConfig, ...config };
      state.printerConfig.lastUpdated = new Date().toISOString();
    },
    // 清除打印机配置
    CLEAR_PRINTER_CONFIG(state) {
      state.printerConfig = {
        connected: false,
        deviceId: '',
        deviceName: '',
        model: '',
        paperWidth: 100,
        paperHeight: 100,
        serviceId: '',
        writeCharId: '',
        lastUpdated: new Date().toISOString()
      };
    }
  },
  actions: {
    // 初始化打印机配置（从本地存储加载）
    async initPrinterConfig({ commit }) {
      try {
        const printerConfig = uni.getStorageSync('printerConfig');
        if (printerConfig) {
          commit('SET_PRINTER_CONFIG', printerConfig);
        } else {
          // 创建默认配置
          const defaultConfig = {
            connected: false,
            deviceId: '',
            deviceName: '',
            model: '',
            paperWidth: 100,
            paperHeight: 100,
            serviceId: '',
            writeCharId: '',
            lastUpdated: new Date().toISOString()
          };
          uni.setStorageSync('printerConfig', defaultConfig);
          commit('SET_PRINTER_CONFIG', defaultConfig);
        }
        return true;
      } catch (error) {
        console.error('初始化打印机配置失败:', error);
        return false;
      }
    },

    // 保存打印机配置到本地存储
    async savePrinterConfig({ commit, state }, config) {
      try {
        if (config) {
          commit('SET_PRINTER_CONFIG', config);
        }
        uni.setStorageSync('printerConfig', state.printerConfig);
        return true;
      } catch (error) {
        console.error('保存打印机配置失败:', error);
        return false;
      }
    },

    // 连接打印机（更新连接状态并保存）
    async connectPrinter({ commit, dispatch }, device) {
      try {
        const config = {
          connected: true,
          deviceId: device.deviceId,
          deviceName: device.name || device.localName,
          lastUpdated: new Date().toISOString()
        };
        await dispatch('savePrinterConfig', config);
        return true;
      } catch (error) {
        console.error('连接打印机失败:', error);
        return false;
      }
    },

    // 断开打印机连接
    async disconnectPrinter({ commit, dispatch }) {
      try {
        commit('SET_PRINTER_CONFIG', {
          connected: false    // ✅ 只更新连接状态
        });
        await dispatch('savePrinterConfig');
        return true;
      } catch (error) {
        console.error('断开打印机失败:', error);
        return false;
      }
    },

    // 清除打印机配置（重置并删除本地存储）
    async clearPrinterConfig({ commit }) {
      try {
        commit('CLEAR_PRINTER_CONFIG');
        uni.removeStorageSync('printerConfig');
        return true;
      } catch (error) {
        console.error('清除打印机配置失败:', error);
        return false;
      }
    },

    // 更新纸张尺寸
    async updatePaperSize({ dispatch }, { width, height }) {
      try {
        await dispatch('savePrinterConfig', {
          paperWidth: width,
          paperHeight: height,
          lastUpdated: new Date().toISOString()
        });
        return true;
      } catch (error) {
        console.error('更新纸张尺寸失败:', error);
        return false;
      }
    }
  },
  getters: {
    // 连接状态
    isPrinterConnected: state => state.printerConfig.connected,

    // 设备信息
    deviceId: state => state.printerConfig.deviceId,
    deviceName: state => state.printerConfig.deviceName,
    printerModel: state => state.printerConfig.model,

    // 服务配置
    serviceId: state => state.printerConfig.serviceId,
    writeCharId: state => state.printerConfig.writeCharId,

    // 纸张尺寸
    paperWidth: state => state.printerConfig.paperWidth,
    paperHeight: state => state.printerConfig.paperHeight,
    paperSize: state => `${state.printerConfig.paperWidth}×${state.printerConfig.paperHeight}mm`,

    // 完整配置
    savedConfig: state => state.printerConfig,

    // 配置是否为空
    hasSavedConfig: state => !!state.printerConfig.deviceId
  }
}