class Chamomile::List

# File lib/chamomile/components/list.rb, line 35
def initialize(items:, width: 80, height: 24, delegate: nil, key_map: DEFAULT_KEY_MAP)
  @id = self.class.next_id
  @all_items = items.dup
  @filtered_items = @all_items.dup
  @width = width
  @height = height
  @delegate = delegate
  @key_map = key_map
  @title = ""
  @cursor = 0
  @show_title = true
  @show_filter = true
  @show_status_bar = true
  @show_pagination = true
  @show_help = true
  @filtering_enabled = true
  @filter_state = FILTER_UNFILTERED
  @infinite_scroll = false
  @spinner_visible = false
  @status_message = nil

  @paginator = Paginator.new(per_page: items_per_page)
  @filter_input = TextInput.new(prompt: "/ ")
  @spinner = Spinner.new
  @help = Help.new(width: width)
  @help_bindings = [
    { key: "/", desc: "filter" },
    { key: "esc", desc: "clear" },
    { key: "q", desc: "quit" },
    { key: "?", desc: "more" },
  ]

  recalculate
end

# File lib/chamomile/components/list.rb, line 17
def self.next_id
  @id_mutex.synchronize do
    if Process.pid != @id_pid
      @id_pid = Process.pid
      @next_id = 0
      @id_mutex = Mutex.new
    end
    @next_id += 1
    "#{@id_pid}-lst-#{@next_id}"
  end
end

# File lib/chamomile/components/list.rb, line 130
def cursor_down
  @cursor = if @infinite_scroll && @cursor >= filtered_count - 1 && filtered_count.positive?
              0
            else
              (@cursor + 1).clamp(0, [filtered_count - 1, 0].max)
            end
  update_paginator_page
end

# File lib/chamomile/components/list.rb, line 121
def cursor_up
  @cursor = if @infinite_scroll && @cursor.zero? && filtered_count.positive?
              filtered_count - 1
            else
              (@cursor - 1).clamp(0, [filtered_count - 1, 0].max)
            end
  update_paginator_page
end

# File lib/chamomile/components/list.rb, line 161
def filter_value
  @filter_input.value
end

# File lib/chamomile/components/list.rb, line 114
def global_index
  return nil if @filtered_items.empty?

  item = selected_item
  @all_items.index(item)
end

# File lib/chamomile/components/list.rb, line 144
def goto_end
  @cursor = [filtered_count - 1, 0].max
  update_paginator_page
end

# File lib/chamomile/components/list.rb, line 139
def goto_start
  @cursor = 0
  update_paginator_page
end

# File lib/chamomile/components/list.rb, line 215
def handle(msg)
  case msg
  when Chamomile::KeyEvent
    handle_key(msg)
  when SpinnerTickMsg
    @spinner.update(msg)
    nil
  when FilterMatchesMsg
    @filtered_items = msg.matches
    @cursor = @cursor.clamp(0, [filtered_count - 1, 0].max)
    recalculate
    nil
  when ListStatusTimeoutMsg
    @status_message = nil if msg.id == @id
    nil
  end
end

# File lib/chamomile/components/list.rb, line 110
def index
  @cursor
end

# File lib/chamomile/components/list.rb, line 88
def insert_item(index, item)
  index = index.clamp(0, @all_items.length)
  @all_items.insert(index, item)
  apply_filter
  recalculate
end

# File lib/chamomile/components/list.rb, line 70
def items
  @filtered_items
end

# File lib/chamomile/components/list.rb, line 74
def items=(new_items)
  @all_items = new_items.dup
  apply_filter
  recalculate
end

# File lib/chamomile/components/list.rb, line 192
def new_status_message(text, lifetime: 1.0)
  @status_message = text
  captured_id = @id
  -> {
    sleep(lifetime)
    ListStatusTimeoutMsg.new(id: captured_id)
  }
end

# File lib/chamomile/components/list.rb, line 155
def next_page
  @paginator.next_page
  @cursor = @paginator.page * items_per_page
  @cursor = @cursor.clamp(0, [filtered_count - 1, 0].max)
end

# File lib/chamomile/components/list.rb, line 149
def prev_page
  @paginator.prev_page
  @cursor = @paginator.page * items_per_page
  @cursor = @cursor.clamp(0, [filtered_count - 1, 0].max)
end

# File lib/chamomile/components/list.rb, line 95
def remove_item(index)
  return nil if index.negative? || index >= @all_items.length

  removed = @all_items.delete_at(index)
  apply_filter
  recalculate
  removed
end

# File lib/chamomile/components/list.rb, line 165
def reset_filter
  @filter_input.value = ""
  @filter_state = FILTER_UNFILTERED
  @filter_input.blur
  @filtered_items = @all_items.dup
  @cursor = 0
  recalculate
end

# File lib/chamomile/components/list.rb, line 104
def selected_item
  return nil if @filtered_items.empty?

  @filtered_items[@cursor]
end

# File lib/chamomile/components/list.rb, line 174
def set_filter_text(text)
  if text.nil? || text.empty?
    reset_filter
    return
  end

  @filter_input.value = text
  @filter_state = FILTER_APPLIED
  @filter_input.blur
  apply_filter
  recalculate
end

# File lib/chamomile/components/list.rb, line 80
def set_item(index, item)
  return if index.negative? || index >= @all_items.length

  @all_items[index] = item
  apply_filter
  recalculate
end

# File lib/chamomile/components/list.rb, line 211
def spinner_visible?
  @spinner_visible
end

# File lib/chamomile/components/list.rb, line 201
def start_spinner
  @spinner_visible = true
  @spinner.tick_cmd
end

# File lib/chamomile/components/list.rb, line 206
def stop_spinner
  @spinner_visible = false
  nil
end

# File lib/chamomile/components/list.rb, line 235
def view
  sections = []

  sections << render_title if @show_title && !@title.empty?
  sections << render_filter if @show_filter && @filter_state != FILTER_UNFILTERED
  sections << render_status_bar if @show_status_bar
  sections << render_items
  sections << @paginator.view if @show_pagination && @paginator.total_pages > 1
  sections << render_help if @show_help

  sections.compact.reject(&:empty?).join("\n")
end

# File lib/chamomile/components/list.rb, line 187
def visible_items
  start, length = @paginator.slice_bounds(filtered_count)
  @filtered_items[start, length] || []
end