run = {}

Editor_state = {}

-- called both in tests and real run
function run.initialize_globals()
  -- tests currently mostly clear their own state

  Font_height = 20
  Line_height = math.floor(Font_height*1.3)

  File_select_bar_value = nil

  -- blinking cursor
  Cursor_time = 0
end

-- called only for real run
function run.initialize(arg)
  log_new('run')
  -- maximizing on iOS breaks text rendering: https://github.com/deltadaedalus/vudu/issues/7
  -- no point second-guessing window dimensions on mobile
  App.screen.width, App.screen.height, App.screen.flags = App.screen.size()
  if Settings then
    run.load_settings()
  else
    run.initialize_default_settings()
  end

  if #arg > 0 and Editor_state.filename ~= absolutize(arg[1]) then
    Editor_state.filename = arg[1]
    load_from_disk(Editor_state)
    Text.redraw_all(Editor_state)
    Editor_state.screen_top1 = {line=1, pos=1}
    Editor_state.cursor1 = {line=1, pos=1}
  else
    load_from_disk(Editor_state)
    Text.redraw_all(Editor_state)
  end
  edit.check_locs(Editor_state)



  -- keep a few blank lines around: https://merveilles.town/@akkartik/110084833821965708
  love.window.setTitle('lines.love - '..Editor_state.filename)



  if #arg > 1 then
    print('ignoring commandline args after '..arg[1])
  end

  if rawget(_G, 'jit') then
    jit.off()
    jit.flush()
  end
end

function print_and_log(s)
  print(s)
  log(3, s)
end

function run.load_settings()
  Font_height = Settings.font_height
  Line_height = math.floor(Font_height*1.3)
  local font = love.graphics.newFont(Font_height)
  Editor_state = edit.initialize_state(Margin_top, 45 + Margin_left, App.screen.width-Margin_right, font, Font_height, Line_height)
  Editor_state.filename = Settings.filename
  Editor_state.screen_top1 = Settings.screen_top
  Editor_state.cursor1 = Settings.cursor
end

function run.initialize_default_settings()
  Font_height = 20
  Line_height = math.floor(Font_height*1.3)
  local font = love.graphics.newFont(Font_height)
  Editor_state = edit.initialize_state(Margin_top, 45 + Margin_left, App.screen.width-Margin_right, font, Font_height, Line_height)
  Settings = run.settings()
end

function run.draw()
  Editor_state.button_handlers = {}
  if App.run_tests == nil then
    run.draw_file_select_button()
  end
  edit.draw(Editor_state)
  if File_select_bar_value then
    run.draw_file_select_bar()
  end
end

function run.draw_file_select_button()
  button(Editor_state, 'open', {x=Menu_left, y=Menu_top, w=40,h=40, bg={r=1,g=0.7,b=1},
      icon = function(button_params)
        local x,y = button_params.x, button_params.y
        local w,h = button_params.w, button_params.h
        love.graphics.setColor(0.4,0.4,0.7)
        love.graphics.rectangle('line', x,y, w,h, 5,5)
      end,
      onpress1 = function()
        File_select_bar_value = ''
      end,
  })
end

function run.draw_file_select_bar()
  local h = Line_height+2
  local y = Menu_top+10
  love.graphics.setColor(0.9,0.9,0.9)
  love.graphics.rectangle('fill', Menu_left, y-10, App.screen.width-1, h+8)
  love.graphics.setColor(0.6,0.6,0.6)
  love.graphics.line(Menu_left, y-10, App.screen.width-1, y-10)
  App.color(Text_color)
  local prompt = 'open file: '
  love.graphics.print(prompt, 15, y-5)
  love.graphics.setColor(1,1,1)
  local text_start_x = Menu_left + Editor_state.font:getWidth(prompt)+20
  love.graphics.rectangle('fill', text_start_x-5, y-6, App.screen.width-text_start_x-20, h+2, 2,2)
  love.graphics.setColor(0.6,0.6,0.6)
  love.graphics.rectangle('line', text_start_x-5, y-6, App.screen.width-text_start_x-20, h+2, 2,2)
  App.color(Text_color)
  App.screen.print(File_select_bar_value, text_start_x,y-5)
  Text.draw_cursor(Editor_state, text_start_x+Editor_state.font:getWidth(File_select_bar_value),y-5)
end

function run.update(dt)
  Cursor_time = Cursor_time + dt
  edit.update(Editor_state, dt)
end

function run.quit()
  edit.quit(Editor_state)
end

function run.settings()
  if Settings == nil then Settings = {} end
  Settings.x, Settings.y, Settings.displayindex = App.screen.position()
  return {
    font_height=Editor_state.font_height,
    filename=absolutize(Editor_state.filename),
    screen_top=Editor_state.screen_top1, cursor=Editor_state.cursor1
  }
end

function absolutize(path)
  if is_relative_path(path) then
    return App.current_dir..path
  end
  return path
end

function run.mouse_press(x,y, mouse_button)
  Cursor_time = 0  -- ensure cursor is visible immediately after it moves
  if File_select_bar_value then return end
  love.keyboard.setTextInput(true)  -- bring up keyboard on touch screen
  return edit.mouse_press(Editor_state, x,y, mouse_button)
end

function run.mouse_release(x,y, mouse_button)
  Cursor_time = 0  -- ensure cursor is visible immediately after it moves
  if File_select_bar_value then return end
  return edit.mouse_release(Editor_state, x,y, mouse_button)
end

function run.text_input(t)
  Cursor_time = 0  -- ensure cursor is visible immediately after it moves
  if File_select_bar_value then
    File_select_bar_value = File_select_bar_value..t
    return
  end
  return edit.text_input(Editor_state, t)
end

function run.keychord_press(chord, key)
  Cursor_time = 0  -- ensure cursor is visible immediately after it moves
  if File_select_bar_value then
    if chord == 'escape' then
      File_select_bar_value = nil
    elseif chord == 'return' then
      run.switch_to_file(File_select_bar_value)
      File_select_bar_value = nil
    elseif chord == 'backspace' then
      local len = utf8.len(File_select_bar_value)
      local byte_offset = Text.offset(File_select_bar_value, len)
      File_select_bar_value = string.sub(File_select_bar_value, 1, byte_offset-1)
    end
    return
  elseif chord == 'C-w' then
    File_select_bar_value = ''
  end
  return edit.keychord_press(Editor_state, chord, key)
end

function run.switch_to_file(filename)
  -- first make sure to save edits on any existing file
  if Editor_state.next_save then
    save_to_disk(Editor_state)
  end
  -- handle people hitting enter without a filename
  if filename == '' then
    return
  end
  -- clear the slate for the new file
  Editor_state.filename = love.filesystem.getSourceBaseDirectory()..'/'..filename
  load_from_disk(Editor_state)
  Text.redraw_all(Editor_state)
  Editor_state.screen_top1 = {line=1, pos=1}
  Editor_state.cursor1 = {line=1, pos=1}
  love.window.setTitle('lines.love - '..Editor_state.filename)
end

function run.key_release(key, scancode)
  Cursor_time = 0  -- ensure cursor is visible immediately after it moves
  return edit.key_release(Editor_state, key, scancode)
end

function width(s)
  return love.graphics.getFont():getWidth(s)
end