register_comp("Speck_Editor", function(editor)
  editor.filepath = "res/speck/test.speck.lua"
  add_comp(editor, "Speck_System", editor.filepath)
end)

local PROPERTY_CUSTOM = {
  spawn_shape      = { "Point", "Circle", "Rectangle" },
  spawn_amount_min = { min = 1, max = 64, step = 1 },
  spawn_amount_max = { min = 1, max = 64, step = 1 },
  spawn_width      = { min = 0, max = 1024, step = 1 },
  spawn_height     = { min = 0, max = 1024, step = 1 },
  spawn_radius     = { min = 0, max = 1024, step = 1 },
  scale_curve      = {},
  scale_start_min  = { min = 0, max = 16 },
  scale_start_max  = { min = 0, max = 16 },
  forcex           = { min = -2048, max = 2048 },
  forcey           = { min = -2048, max = 2048 },
  damping          = { min = 0, max = 128 },
  initial_velx_max = { min = 0, max = 2048 },
  initial_velx_min = { min = 0, max = 2048 },
  initial_vely_max = { min = 0, max = 2048 },
  initial_vely_min = { min = 0, max = 2048 },
  spread           = { min = 0, max = 360 },
  lifetime_min     = { min = 0, max = 32 },
  lifetime_max     = { min = 0, max = 32 },
  interval         = { min = 0, max = 32, step = 0.01 },
  texture_path     = { is_file = true, directory = "res/img/" },
  gradient         = { is_file = true, directory = "res/img/" },
}

for key, _ in pairs(EASING_FUNCTIONS) do
  PROPERTY_CUSTOM.scale_curve[#PROPERTY_CUSTOM.scale_curve + 1] = key
end

local PROPERTY_TYPES = {
  ["number"] = function(props, name, value, custom)
    custom = custom or {}
    im.layout({ 0.5, 1 })
    im.text(name)
    im.text(tostring(value))
    im.layout()
    props[name] = im.slider(
      value, custom.min or 0, custom.max or 1, custom.step or 0.1)
  end,
  ["boolean"] = function(props, name, value)
    im.layout({ 0.25, 0.5, 1 })
    im.text(name)
    im.text(tostring(value))
    if im.button("Toggle") then
      props[name] = not value
    end
    im.layout()
  end,
  ["string"] = function(props, name, value, custom)
    if custom.is_file then
      im.layout({ 0.25, 0.8, 1 })
    else
      im.layout({ 0.5, 1 })
    end

    im.text(name)
    im.text(value)
    if custom.is_file then
      if im.button("Change") then

        lw.showFileDialog("openfile", function(files, _, _)
          if not files[1] or files[1] == "" then
            return
          end

          props[name] = trunc_filename_to_res(files[1])
        end, { defaultname = custom.directory or "", attachtowindow = true })
      end
    end
    im.layout()
  end,
}

local function save(editor)
  export_speck_sys(editor.speck_sys, editor.filepath)
end

local function speck_editor_ui_sys(editor)
  local system = editor.speck_sys

  im.begin_window("Speck Editor", 5, 5, 400, 1024, {})
  im.text("Properties:")
  for _, prop in ipairs(SPECK_EXPORTED_ARGS) do
    local func = PROPERTY_TYPES[type(system[prop])]
    if func then
      func(editor.speck_sys, prop, system[prop], PROPERTY_CUSTOM[prop])
    end
  end

  im.text("File:")
  if im.button("Open") then
    editor.filepath = lw.showFileDialog("savefile", function(files, _, _)
      if not files[1] or files[1] == "" then
        return
      end

      editor.filepath = trunc_filename_to_res(files[1])
      editor.speck_sys = load_speck_sys_non_cached(editor.filepath)
    end, { defaultname = "res/speck/", attachtowindow = true })
  end

  if im.button("Save as") then
    editor.filepath = lw.showFileDialog("savefile", function(files, _, _)
      if not files[1] or files[1] == "" then
        return
      end

      editor.filepath = trunc_filename_to_res(files[1])
      save(editor)
    end, { defaultname = "res/speck/", attachtowindow = true })
  end
  if im.button("Save") then
    save(editor)
  end

  im.end_window()
end

function start_speck_editor()
  local scn = new_scene()
  set_scene(scn)

  event_bind(scn.on_update, "Speck_System", speck_update_sys)

  event_bind(scn.on_draw, "Speck_System", speck_draw_sys)

  event_bind(scn.on_ui, "Speck_Editor", speck_editor_ui_sys)

  local editor = new_entity()
  add_comp(editor, "Position", 0, 0)
  add_comp(editor, "Speck_Editor")
  return scn
end