extends Node3D
class_name Level

var level_instance_list: Array[LevelInstance]
var born_pos: Vector3

@onready var grid_block_material: Material = load("res://render/material/grid_block.tres") as Material
@onready var grid_block_link_material: Material = load("res://render/material/grid_block_link.tres") as Material


func init() -> void:
    grid_block_material.set_shader_parameter("is_link", false)
    grid_block_link_material.set_shader_parameter("is_link", true)
    grid_block_material.set_shader_parameter("is_target", true)
    grid_block_link_material.set_shader_parameter("is_target", true)


func get_level_instance_list() -> Array[LevelInstance]:
    if not level_instance_list:
        level_instance_list = []
        var rooms_node: Node3D       = %Levels as Node3D
        var level_character: GridMap = %LevelCharacter as GridMap
        for rooms_node_child in rooms_node.get_children():
            if not rooms_node_child is LevelArea:
                continue
            for rooms_node_child_child in rooms_node_child.get_children():
                if rooms_node_child_child is LevelInstance:
                    rooms_node_child_child.level_area_cfg = rooms_node_child.cfg
                    rooms_node_child_child.set_level_range_visible(false)
                    level_instance_list.append(rooms_node_child_child)
                    rooms_node_child_child.init_character_spots(level_character)

    return level_instance_list


func set_level_loading_rate(rate: float) -> void:
    grid_block_material.set_shader_parameter("focus_rate", rate)


func get_born_pos() -> Vector3:
    if not born_pos:
        var born_pos_node: Node3D = %BornPos as Node3D
        born_pos = born_pos_node.get_global_position()
    return born_pos


func set_player_position(pos: Vector3) -> void:
    grid_block_material.set_shader_parameter("target_position", pos)
    grid_block_link_material.set_shader_parameter("target_position", pos)