import { botDatabase } from './database';
import { logger } from './logger';
import { GroupSettings, ReminderTime, reminderTimeToMinutes } from '../types/groups';

class GroupStateManager {
  async init(): Promise<void> {
    // Database is initialized separately
    logger.info('Group state manager initialized (using SQLite database)');
  }

  /**
   * Get group settings
   */
  async getGroup(groupId: number): Promise<GroupSettings | null> {
    return botDatabase.getGroup(groupId);
  }

  /**
   * Register a new group
   */
  async registerGroup(
    groupId: number,
    groupTitle: string,
    addedBy: number
  ): Promise<GroupSettings> {
    return botDatabase.registerGroup(groupId, groupTitle, addedBy);
  }

  /**
   * Remove a group
   */
  async removeGroup(groupId: number): Promise<void> {
    botDatabase.removeGroup(groupId);
  }

  /**
   * Save group settings
   */
  async saveGroup(settings: GroupSettings): Promise<void> {
    botDatabase.saveGroup(settings);
    logger.debug('Group settings saved', { groupId: settings.groupId });
  }

  /**
   * Update a group setting
   */
  async updateSetting(
    groupId: number,
    setting:
      | 'enabled'
      | 'drawAnnouncements'
      | 'reminders'
      | 'newJackpotAnnouncement'
      | 'ticketPurchaseAllowed'
      | 'reminder1Enabled'
      | 'reminder2Enabled'
      | 'reminder3Enabled',
    value: boolean
  ): Promise<GroupSettings | null> {
    return botDatabase.updateGroupSetting(groupId, setting, value);
  }

  /**
   * Update reminder time for a slot
   */
  async updateReminderTime(
    groupId: number,
    slot: 1 | 2 | 3,
    time: ReminderTime
  ): Promise<GroupSettings | null> {
    return botDatabase.updateReminderTime(groupId, slot, time);
  }

  /**
   * Update announcement delay
   */
  async updateAnnouncementDelay(
    groupId: number,
    seconds: number
  ): Promise<GroupSettings | null> {
    return botDatabase.updateAnnouncementDelay(groupId, seconds);
  }

  /**
   * Update new jackpot announcement delay
   */
  async updateNewJackpotDelay(
    groupId: number,
    minutes: number
  ): Promise<GroupSettings | null> {
    return botDatabase.updateNewJackpotDelay(groupId, minutes);
  }

  /**
   * Get groups with specific feature enabled
   */
  async getGroupsWithFeature(
    feature: 'enabled' | 'drawAnnouncements' | 'reminders' | 'newJackpotAnnouncement'
  ): Promise<GroupSettings[]> {
    if (feature === 'newJackpotAnnouncement') {
      const allGroups = await this.getAllGroups();
      return allGroups.filter(g => g.enabled && g.newJackpotAnnouncement);
    }
    return botDatabase.getGroupsWithFeature(feature as 'enabled' | 'drawAnnouncements' | 'reminders');
  }

  /**
   * Get all groups
   */
  async getAllGroups(): Promise<GroupSettings[]> {
    return botDatabase.getAllGroups();
  }

  /**
   * Get groups that need reminders for a specific draw time
   */
  async getGroupsNeedingReminders(drawTime: Date): Promise<Array<{
    settings: GroupSettings;
    reminderSlot: 1 | 2 | 3;
  }>> {
    const allGroups = await this.getGroupsWithFeature('reminders');
    const now = new Date();
    const minutesUntilDraw = (drawTime.getTime() - now.getTime()) / (1000 * 60);
    const results: Array<{ settings: GroupSettings; reminderSlot: 1 | 2 | 3 }> = [];

    for (const group of allGroups) {
      // Check each reminder slot
      if (group.reminder1Enabled) {
        const reminderMinutes = reminderTimeToMinutes(group.reminder1Time);
        if (Math.abs(minutesUntilDraw - reminderMinutes) < 1) {
          results.push({ settings: group, reminderSlot: 1 });
        }
      }

      if (group.reminder2Enabled) {
        const reminderMinutes = reminderTimeToMinutes(group.reminder2Time);
        if (Math.abs(minutesUntilDraw - reminderMinutes) < 1) {
          results.push({ settings: group, reminderSlot: 2 });
        }
      }

      if (group.reminder3Enabled) {
        const reminderMinutes = reminderTimeToMinutes(group.reminder3Time);
        if (Math.abs(minutesUntilDraw - reminderMinutes) < 1) {
          results.push({ settings: group, reminderSlot: 3 });
        }
      }
    }

    return results;
  }

  /**
   * Add time to a reminder
   */
  async addReminderTime(
    groupId: number,
    slot: 1 | 2 | 3,
    amount: number,
    unit: 'minutes' | 'hours' | 'days'
  ): Promise<GroupSettings | null> {
    const group = await this.getGroup(groupId);
    if (!group) return null;

    const timeKey = `reminder${slot}Time` as 'reminder1Time' | 'reminder2Time' | 'reminder3Time';
    const currentTime = group[timeKey];

    // Convert everything to minutes, add, then convert back
    let totalMinutes = reminderTimeToMinutes(currentTime);
    
    switch (unit) {
      case 'minutes': totalMinutes += amount; break;
      case 'hours': totalMinutes += amount * 60; break;
      case 'days': totalMinutes += amount * 24 * 60; break;
    }

    // Ensure minimum of 1 minute
    totalMinutes = Math.max(1, totalMinutes);

    // Convert back to best unit
    const newTime = this.minutesToReminderTime(totalMinutes);
    return this.updateReminderTime(groupId, slot, newTime);
  }

  /**
   * Remove time from a reminder
   */
  async removeReminderTime(
    groupId: number,
    slot: 1 | 2 | 3,
    amount: number,
    unit: 'minutes' | 'hours' | 'days'
  ): Promise<GroupSettings | null> {
    return this.addReminderTime(groupId, slot, -amount, unit);
  }

  /**
   * Convert total minutes to the best ReminderTime representation
   */
  private minutesToReminderTime(totalMinutes: number): ReminderTime {
    // Use days if evenly divisible and >= 1 day
    if (totalMinutes >= 1440 && totalMinutes % 1440 === 0) {
      return { value: totalMinutes / 1440, unit: 'days' };
    }
    // Use hours if evenly divisible and >= 1 hour
    if (totalMinutes >= 60 && totalMinutes % 60 === 0) {
      return { value: totalMinutes / 60, unit: 'hours' };
    }
    // Use minutes
    return { value: totalMinutes, unit: 'minutes' };
  }

  /**
   * Shutdown
   */
  async close(): Promise<void> {
    // Database close is handled separately
    logger.info('Group state manager closed');
  }
}

export const groupStateManager = new GroupStateManager();
export default groupStateManager;