module ChannelStats

# File lib/channel_stats.rb, line 46
def busiest_hour(network:, channel:, store: RabbotDb)
  hour_key = store.get_plugin_json(
    plugin: PLUGIN,
    key: "hour_counts",
    network: network,
    channel: channel,
    default: {}
  )
  return nil if hour_key.empty?

  hour, count = hour_key.max_by { |_hour, value| value }
  { hour: hour.to_i, count: count }
end

# File lib/channel_stats.rb, line 79
def format_stats_report(top_nicks:, busiest_hour: nil)
  lines = top_nicks.map.with_index(1) { |entry, index| "#{index}. #{entry[:nick]} — #{entry[:count]} msgs" }
  if busiest_hour
    lines << "Busiest hour: #{busiest_hour[:hour].to_s.rjust(2, '0')}:00 UTC (#{busiest_hour[:count]} msgs)"
  end
  lines.join("\n")
end

# File lib/channel_stats.rb, line 11
def increment(network:, channel:, nick:, store: RabbotDb)
  counts = load(network: network, channel: channel, store: store)
  key = nick.to_s
  counts[key] = counts.fetch(key, 0) + 1
  save(network: network, channel: channel, counts: counts, store: store)
end

# File lib/channel_stats.rb, line 18
def load(network:, channel:, store: RabbotDb)
  data = store.get_plugin_json(
    plugin: PLUGIN,
    key: KEY,
    network: network,
    channel: channel,
    default: {}
  )
  data.is_a?(Hash) ? data : {}
end

# File lib/channel_stats.rb, line 60
def record_hour(network:, channel:, at: Time.now, store: RabbotDb)
  hour = at.utc.hour
  counts = store.get_plugin_json(
    plugin: PLUGIN,
    key: "hour_counts",
    network: network,
    channel: channel,
    default: {}
  )
  counts[hour.to_s] = counts.fetch(hour.to_s, 0) + 1
  store.set_plugin_json(
    plugin: PLUGIN,
    key: "hour_counts",
    network: network,
    channel: channel,
    value: counts
  )
end

# File lib/channel_stats.rb, line 29
def save(network:, channel:, counts:, store: RabbotDb)
  store.set_plugin_json(
    plugin: PLUGIN,
    key: KEY,
    network: network,
    channel: channel,
    value: counts
  )
end

# File lib/channel_stats.rb, line 39
def top_nicks(network:, channel:, limit: 5, store: RabbotDb)
  load(network: network, channel: channel, store: store)
    .sort_by { |nick, count| [-count, nick.downcase] }
    .first(limit)
    .map { |nick, count| { nick: nick, count: count } }
end