// Preload: the only bridge between renderer and main. Everything the UI
// can do is enumerated here — the renderer has no direct node access.

const { contextBridge, ipcRenderer } = require('electron');

function call(channel, args) {
  return ipcRenderer.invoke(channel, args);
}

contextBridge.exposeInMainWorld('api', {
  login: (opts) => call('api:login', opts),
  logout: () => call('api:logout'),

  listOnuConfigs: (opts) => call('api:listOnuConfigs', opts),
  listFleet: (opts) => call('api:listFleet', opts),
  fetchStates: (opts) => call('api:fetchStates', opts),
  getOnuConfig: (opts) => call('api:getOnuConfig', opts),
  getOnuCpe: (opts) => call('api:getOnuCpe', opts),
  listOnuFirmware: () => call('api:listOnuFirmware'),
  uploadFirmware: () => call('api:uploadFirmware'),

  planUpgrade: (opts) => call('api:planUpgrade', opts),
  executePerOnu: (opts) => call('api:executePerOnu', opts),
  executeBulkTask: (opts) => call('api:executeBulkTask', opts),
  getTaskConfig: (opts) => call('api:getTaskConfig', opts),
  getUpgradeStatus: (opts) => call('api:getUpgradeStatus', opts),

  deleteOnus: (opts) => call('api:deleteOnus', opts),

  dashboardStats: (opts) => call('api:dashboardStats', opts),

  listOlts: (opts) => call('api:listOlts', opts),
  executeFloodChange: (opts) => call('api:executeFloodChange', opts),

  onFloodProgress: (handler) => {
    const fn = (_ev, payload) => handler(payload);
    ipcRenderer.on('olt-flood:progress', fn);
    return () => ipcRenderer.removeListener('olt-flood:progress', fn);
  },

  fetchFecHealth: (opts) => call('api:fetchFecHealth', opts),
  fetchOnuSnapshot: (opts) => call('api:fetchOnuSnapshot', opts),
  savePlanCsv: (opts) => call('api:savePlanCsv', opts),
  saveCsvFile: (opts) => call('api:saveCsvFile', opts),
  openCsvFile: () => call('api:openCsvFile'),

  // Streaming FEC pre-flight progress (one event per ONU resolved).
  onFecProgress: (handler) => {
    const fn = (_ev, payload) => handler(payload);
    ipcRenderer.on('fec:progress', fn);
    return () => ipcRenderer.removeListener('fec:progress', fn);
  },

  // Streaming verify-snapshot progress.
  onVerifyProgress: (handler) => {
    const fn = (_ev, payload) => handler(payload);
    ipcRenderer.on('verify:progress', fn);
    return () => ipcRenderer.removeListener('verify:progress', fn);
  },

  // Live progress events from the main process while executePerOnu runs.
  onUpgradeProgress: (handler) => {
    const fn = (_ev, payload) => handler(payload);
    ipcRenderer.on('upgrade:progress', fn);
    return () => ipcRenderer.removeListener('upgrade:progress', fn);
  },

  // Streaming state-fetch progress (Equipment ID population).
  onStatesProgress: (handler) => {
    const fn = (_ev, payload) => handler(payload);
    ipcRenderer.on('states:progress', fn);
    return () => ipcRenderer.removeListener('states:progress', fn);
  },

  // Streaming delete progress.
  onDeleteProgress: (handler) => {
    const fn = (_ev, payload) => handler(payload);
    ipcRenderer.on('delete:progress', fn);
    return () => ipcRenderer.removeListener('delete:progress', fn);
  },
});