package game

import clay "../clay-odin"
import rl "vendor:raylib"

ui_memory: [^]u8
ui_arena: clay.Arena
ui_render_commands: clay.ClayArray(clay.RenderCommand)

ui_error_handler :: proc "c" (data: clay.ErrorData) {
	_ = data
}

init_ui :: proc() {
	ui_register_font()

	min_size := clay.MinMemorySize()
	ui_memory = make([^]u8, min_size)
	ui_arena = clay.CreateArenaWithCapacityAndMemory(uint(min_size), ui_memory)
	clay.Initialize(ui_arena, {f32(SCREEN_W), f32(SCREEN_H)}, {handler = ui_error_handler})
	clay.SetMeasureTextFunction(measure_text, nil)

}

destroy_ui :: proc() {
	free(ui_memory)
}

ui_prepare_frame :: proc(world: ^World, dt: f32) {
	mouse := rl.GetMousePosition()
	clay.SetLayoutDimensions({f32(SCREEN_W), f32(SCREEN_H)})
	clay.SetPointerState({mouse.x, mouse.y}, rl.IsMouseButtonDown(.LEFT))
	clay.UpdateScrollContainers(false, {}, dt)

	clay.BeginLayout()
	build_hud(world)
	ui_render_commands = clay.EndLayout(dt)
}

render_ui :: proc() {
	clay_raylib_render(&ui_render_commands)
}