const { SlashCommandBuilder, EmbedBuilder, PermissionFlagsBits } = require('discord.js');

module.exports = {
  data: new SlashCommandBuilder()
    .setName('activity-roles')
    .setDescription('Manage automatic role rewards for activity milestones')
    .setDefaultMemberPermissions(PermissionFlagsBits.Administrator)
    .addSubcommand(sub =>
      sub.setName('add')
        .setDescription('Add a role reward for an activity milestone')
        .addRoleOption(opt =>
          opt.setName('role')
            .setDescription('The role to award')
            .setRequired(true))
        .addStringOption(opt =>
          opt.setName('type')
            .setDescription('Type of activity milestone')
            .setRequired(true)
            .addChoices(
              { name: 'Messages - Total messages sent', value: 'messages' },
              { name: 'Voice Hours - Time in voice channels', value: 'voice_hours' },
              { name: 'Daily Streak - Consecutive daily claims', value: 'daily_streak' },
              { name: 'Reactions Given - Reactions added to messages', value: 'reactions_given' },
              { name: 'Reactions Received - Reactions on your messages', value: 'reactions_received' },
              { name: 'Commands Used - Bot commands used', value: 'commands_used' }
            ))
        .addIntegerOption(opt =>
          opt.setName('value')
            .setDescription('Milestone value (message count, hours, streak days, etc.)')
            .setRequired(true)
            .setMinValue(1))
        .addBooleanOption(opt =>
          opt.setName('stack')
            .setDescription('Keep previous milestone roles (true) or replace them (false)')
            .setRequired(false)))
    .addSubcommand(sub =>
      sub.setName('remove')
        .setDescription('Remove an activity role reward')
        .addRoleOption(opt =>
          opt.setName('role')
            .setDescription('The role to remove from rewards')
            .setRequired(true)))
    .addSubcommand(sub =>
      sub.setName('list')
        .setDescription('View all configured activity role rewards'))
    .addSubcommand(sub =>
      sub.setName('clear')
        .setDescription('Clear all role rewards for an activity type')
        .addStringOption(opt =>
          opt.setName('type')
            .setDescription('Type of activity to clear')
            .setRequired(true)
            .addChoices(
              { name: 'Message roles', value: 'messages' },
              { name: 'Voice hour roles', value: 'voice_hours' },
              { name: 'Daily streak roles', value: 'daily_streak' },
              { name: 'Reactions given roles', value: 'reactions_given' },
              { name: 'Reactions received roles', value: 'reactions_received' },
              { name: 'Commands used roles', value: 'commands_used' },
              { name: 'All activity roles', value: 'all' }
            ))),

  async execute(interaction, client, supabase) {
    if (!supabase) {
      return interaction.reply({
        content: '❌ Database not configured. Activity roles require Supabase.',
        ephemeral: true
      });
    }

    const guildId = interaction.guildId;
    const subcommand = interaction.options.getSubcommand();

    switch (subcommand) {
      case 'add':
        return handleAdd(interaction, supabase, guildId);
      case 'remove':
        return handleRemove(interaction, supabase, guildId);
      case 'list':
        return handleList(interaction, supabase, guildId);
      case 'clear':
        return handleClear(interaction, supabase, guildId);
    }
  }
};

const ACTIVITY_TYPES = ['messages', 'voice_hours', 'daily_streak', 'reactions_given', 'reactions_received', 'commands_used'];

async function handleAdd(interaction, supabase, guildId) {
  const role = interaction.options.getRole('role');
  const type = interaction.options.getString('type');
  const value = interaction.options.getInteger('value');
  const stack = interaction.options.getBoolean('stack') ?? true;

  if (role.managed) {
    return interaction.reply({
      content: '❌ Cannot use managed roles (bot roles, integration roles) as rewards.',
      ephemeral: true
    });
  }

  const botMember = interaction.guild.members.me;
  if (role.position >= botMember.roles.highest.position) {
    return interaction.reply({
      content: '❌ I cannot assign this role. It is higher than or equal to my highest role.',
      ephemeral: true
    });
  }

  try {
    const { error } = await supabase
      .from('activity_roles')
      .upsert({
        guild_id: guildId,
        role_id: role.id,
        milestone_type: type,
        milestone_value: value,
        stack_roles: stack,
        created_at: new Date().toISOString()
      }, { onConflict: 'guild_id,role_id' });

    if (error) throw error;

    const typeNames = {
      messages: 'Messages',
      voice_hours: 'Voice Hours',
      daily_streak: 'Daily Streak',
      reactions_given: 'Reactions Given',
      reactions_received: 'Reactions Received',
      commands_used: 'Commands Used'
    };

    const valueDisplay = type === 'voice_hours' ? `${value} hour(s)` : 
                        type === 'daily_streak' ? `${value} day(s)` : 
                        value.toLocaleString();

    return interaction.reply({
      content: `✅ ${role} will be awarded at **${valueDisplay} ${typeNames[type]}**.\nRole stacking: ${stack ? 'Enabled (keep previous roles)' : 'Disabled (replace previous roles)'}`,
      ephemeral: true
    });
  } catch (error) {
    console.error('Failed to add activity role:', error.message);
    return interaction.reply({
      content: '❌ Failed to add activity role reward. Please try again.',
      ephemeral: true
    });
  }
}

async function handleRemove(interaction, supabase, guildId) {
  const role = interaction.options.getRole('role');

  try {
    const { data, error } = await supabase
      .from('activity_roles')
      .delete()
      .eq('guild_id', guildId)
      .eq('role_id', role.id)
      .select();

    if (error) throw error;

    if (!data || data.length === 0) {
      return interaction.reply({
        content: `❌ ${role} is not configured as an activity role reward.`,
        ephemeral: true
      });
    }

    return interaction.reply({
      content: `✅ Removed ${role} from activity role rewards.`,
      ephemeral: true
    });
  } catch (error) {
    console.error('Failed to remove activity role:', error.message);
    return interaction.reply({
      content: '❌ Failed to remove activity role reward. Please try again.',
      ephemeral: true
    });
  }
}

async function handleList(interaction, supabase, guildId) {
  try {
    const { data: roles, error } = await supabase
      .from('activity_roles')
      .select('*')
      .eq('guild_id', guildId)
      .order('milestone_type')
      .order('milestone_value', { ascending: true });

    if (error) throw error;

    if (!roles || roles.length === 0) {
      return interaction.reply({
        content: '📋 No activity role rewards configured. Use `/activity-roles add` to create some!',
        ephemeral: true
      });
    }

    const messageRoles = roles.filter(r => r.milestone_type === 'messages');
    const voiceRoles = roles.filter(r => r.milestone_type === 'voice_hours');
    const streakRoles = roles.filter(r => r.milestone_type === 'daily_streak');
    const reactGivenRoles = roles.filter(r => r.milestone_type === 'reactions_given');
    const reactReceivedRoles = roles.filter(r => r.milestone_type === 'reactions_received');
    const commandRoles = roles.filter(r => r.milestone_type === 'commands_used');

    const formatRoles = (roleList, suffix) => {
      if (roleList.length === 0) return 'None configured';
      return roleList.map(r => {
        const stackIcon = r.stack_roles ? '📚' : '🔄';
        return `${stackIcon} <@&${r.role_id}> → ${r.milestone_value.toLocaleString()}${suffix}`;
      }).join('\n');
    };

    const embed = new EmbedBuilder()
      .setTitle('🎯 Activity Role Rewards')
      .setColor(0x10B981)
      .setDescription('Roles awarded automatically when users reach activity milestones.')
      .addFields(
        { name: '💬 Message Roles', value: formatRoles(messageRoles, ' messages'), inline: false },
        { name: '🎤 Voice Hour Roles', value: formatRoles(voiceRoles, ' hours'), inline: false },
        { name: '🔥 Daily Streak Roles', value: formatRoles(streakRoles, ' day streak'), inline: false }
      )
      .setFooter({ text: '📚 = Stack roles | 🔄 = Replace previous' })
      .setTimestamp();

    if (reactGivenRoles.length > 0 || reactReceivedRoles.length > 0 || commandRoles.length > 0) {
      embed.addFields(
        { name: '👍 Reactions Given Roles', value: formatRoles(reactGivenRoles, ' reactions'), inline: false },
        { name: '❤️ Reactions Received Roles', value: formatRoles(reactReceivedRoles, ' reactions'), inline: false },
        { name: '⚡ Command Usage Roles', value: formatRoles(commandRoles, ' commands'), inline: false }
      );
    }

    return interaction.reply({ embeds: [embed] });
  } catch (error) {
    console.error('Failed to list activity roles:', error.message);
    return interaction.reply({
      content: '❌ Failed to fetch activity role rewards. Please try again.',
      ephemeral: true
    });
  }
}

async function handleClear(interaction, supabase, guildId) {
  const type = interaction.options.getString('type');

  try {
    let query = supabase.from('activity_roles').delete().eq('guild_id', guildId);

    if (type !== 'all') {
      query = query.eq('milestone_type', type);
    }

    const { data, error } = await query.select();

    if (error) throw error;

    const count = data?.length || 0;
    const typeNames = {
      messages: 'message',
      voice_hours: 'voice hour',
      daily_streak: 'daily streak',
      reactions_given: 'reactions given',
      reactions_received: 'reactions received',
      commands_used: 'command usage',
      all: 'activity'
    };

    return interaction.reply({
      content: `✅ Cleared **${count}** ${typeNames[type]} role reward(s).`,
      ephemeral: true
    });
  } catch (error) {
    console.error('Failed to clear activity roles:', error.message);
    return interaction.reply({
      content: '❌ Failed to clear activity role rewards. Please try again.',
      ephemeral: true
    });
  }
}