const fs = require('fs');
const path = require('path');

const HOSTER_SETTINGS_DEFAULTS = {
  retries: 3,
  maxSpeedKbs: 0,       // 0 = unlimited
  parallelCount: 2,     // 1-10
  restartBelowKbs: 0,   // 0 = off
  timeIntervalSec: 0,   // delay between jobs
  maxSizeMb: 0          // 0 = unlimited
};

const DEFAULTS = {
  hosters: {
    'doodstream.com': { enabled: true, apiKey: '' },
    'voe.sx': { enabled: true, apiKey: '' },
    'vidmoly.me': { enabled: true, authType: 'login', username: '', password: '' },
    'byse.sx': { enabled: true, apiKey: '' }
  },
  hosterSettings: {
    'doodstream.com': { ...HOSTER_SETTINGS_DEFAULTS },
    'voe.sx': { ...HOSTER_SETTINGS_DEFAULTS },
    'vidmoly.me': { ...HOSTER_SETTINGS_DEFAULTS },
    'byse.sx': { ...HOSTER_SETTINGS_DEFAULTS }
  },
  globalSettings: {
    alwaysOnTop: false,
    shutdownAfterFinish: 'nothing' // nothing | sleep | shutdown | restart
  },
  history: []
};

const MAX_HISTORY = 100;

class ConfigStore {
  constructor(app) {
    const dir = app && app.isPackaged
      ? app.getPath('userData')
      : path.join(__dirname, '..');
    this.filePath = path.join(dir, 'electron-config.json');
  }

  load() {
    try {
      const raw = fs.readFileSync(this.filePath, 'utf-8');
      const data = JSON.parse(raw);
      // Merge with defaults so new hosters are always present
      const hosters = { ...DEFAULTS.hosters };
      for (const [name, val] of Object.entries(data.hosters || {})) {
        if (hosters[name]) {
          hosters[name] = { ...hosters[name], ...val };
        }
      }
      // Merge hoster settings with defaults
      const hosterSettings = {};
      for (const name of Object.keys(DEFAULTS.hosterSettings)) {
        hosterSettings[name] = {
          ...HOSTER_SETTINGS_DEFAULTS,
          ...(data.hosterSettings && data.hosterSettings[name] || {})
        };
      }
      const globalSettings = {
        ...DEFAULTS.globalSettings,
        ...(data.globalSettings || {})
      };
      return { hosters, hosterSettings, globalSettings, history: data.history || [] };
    } catch {
      return JSON.parse(JSON.stringify(DEFAULTS));
    }
  }

  save(config) {
    const current = this.load();
    // Update hosters credentials
    if (config.hosters) current.hosters = config.hosters;
    // Update hoster settings
    if (config.hosterSettings) current.hosterSettings = config.hosterSettings;
    // Update global settings
    if (config.globalSettings) current.globalSettings = config.globalSettings;
    fs.writeFileSync(this.filePath, JSON.stringify(current, null, 2), 'utf-8');
  }

  loadHistory() {
    const config = this.load();
    return config.history || [];
  }

  appendHistory(entry) {
    const config = this.load();
    config.history.push(entry);
    // Cap at MAX_HISTORY
    if (config.history.length > MAX_HISTORY) {
      config.history = config.history.slice(-MAX_HISTORY);
    }
    fs.writeFileSync(this.filePath, JSON.stringify(config, null, 2), 'utf-8');
  }

  clearHistory() {
    const config = this.load();
    config.history = [];
    fs.writeFileSync(this.filePath, JSON.stringify(config, null, 2), 'utf-8');
  }
}

module.exports = ConfigStore;