/**
 * VM Provisioner IPC Handler
 * Wires the Electron wizard to VMDiskProvisioner.
 * Add to src/main/index.js alongside the existing IPC handlers.
 */

const { ipcMain } = require('electron');
const { VMDiskProvisioner, DISK_PRESETS } = require('./vm-provisioner');
const fs = require('fs').promises;
const path = require('path');

function registerVMHandlers(mainWindow) {
  const provisioner = new VMDiskProvisioner();

  // --- Get disk presets for wizard UI ---
  ipcMain.handle('vm:get-presets', async () => {
    return DISK_PRESETS;
  });

  // --- Get current VM status ---
  ipcMain.handle('vm:get-status', async () => {
    try {
      const status = await provisioner.getStatus();
      // Also check for saved vmInfo from previous install
      try {
        const configPath = path.join(getInstallBase(), '.dashcaddy-config.json');
        const config = JSON.parse(await fs.readFile(configPath, 'utf8'));
        if (config.vmInfo) {
          status.vmInfo = config.vmInfo;
          status.diskSizeGB = config.vmInfo.diskSizeGB;
        }
      } catch {}
      return status;
    } catch (e) {
      return { platform: process.platform, running: false, error: e.message };
    }
  });

  // --- Provision the VM sandbox ---
  ipcMain.handle('vm:provision', async (event, opts) => {
    try {
      const result = await provisioner.provision({
        ...opts,
        onProgress: (msg, pct) => {
          mainWindow.webContents.send('vm:progress', { message: msg, percent: pct });
        },
      });

      // Save vmInfo for uninstall
      if (result.vmInfo) {
        try {
          const configPath = path.join(opts.installPath || getInstallBase(), '.dashcaddy-config.json');
          let config = {};
          try { config = JSON.parse(await fs.readFile(configPath, 'utf8')); } catch {}
          config.vmInfo = result.vmInfo;
          config.diskBudgetGB = opts.diskSizeGB;
          await fs.writeFile(configPath, JSON.stringify(config, null, 2));
        } catch {}
      }

      mainWindow.webContents.send('vm:complete', result);
      return result;
    } catch (error) {
      mainWindow.webContents.send('vm:error', { error: error.message });
      return { success: false, error: error.message };
    }
  });

  // --- Destroy the VM sandbox (uninstall) ---
  ipcMain.handle('vm:destroy', async (event, opts) => {
    try {
      // Load saved vmInfo
      let vmInfo = opts.vmInfo;
      if (!vmInfo) {
        try {
          const configPath = path.join(opts.installPath || getInstallBase(), '.dashcaddy-config.json');
          const config = JSON.parse(await fs.readFile(configPath, 'utf8'));
          vmInfo = config.vmInfo;
        } catch {}
      }

      if (!vmInfo) {
        return { success: false, error: 'No VM info found. Already uninstalled?' };
      }

      const result = await provisioner.destroy(vmInfo, {
        exportDataPath: opts.exportDataPath || null,
      });

      return result;
    } catch (error) {
      return { success: false, error: error.message };
    }
  });

  // --- Export data from VM (before uninstall) ---
  ipcMain.handle('vm:export-data', async (event, opts) => {
    try {
      const result = await provisioner._exportData(opts.vmInfo, opts.exportPath);
      return result;
    } catch (error) {
      return { success: false, error: error.message };
    }
  });
}

function getInstallBase() {
  const { getPlatformInfo } = require('../shared/platform-utils');
  return getPlatformInfo().defaultInstallPath;
}

module.exports = { registerVMHandlers };