@tool
extends "res://addons/MetroidvaniaSystem/Database/SubEditor.gd"

enum { MODE_DRAW, MODE_ERASE, MODE_PICK }

var can_pick: bool
var super_use_cursor: bool
var whole_room: bool

func _editor_init() -> void:
    super_use_cursor = use_cursor

func _editor_enter():
    super()
    %Shortcuts.show()
    %ShortcutPick.visible = can_pick

func _editor_exit():
    super()
    %Shortcuts.hide()

func _editor_input(event: InputEvent):
    if event is InputEventMouseButton:
        if event.pressed:
            if event.button_index == MOUSE_BUTTON_LEFT:
                if can_pick and not whole_room and event.is_command_or_control_pressed():
                    paint(MODE_PICK)
                else:
                    paint(MODE_DRAW)
            elif event.button_index == MOUSE_BUTTON_RIGHT:
                paint(MODE_ERASE)
    
    elif event is InputEventMouseMotion:
        if whole_room:
            update_hovered_room()
        
        if event.button_mask & (MOUSE_BUTTON_MASK_LEFT | MOUSE_BUTTON_MASK_RIGHT):
            var erase := bool(event.button_mask & MOUSE_BUTTON_MASK_RIGHT)
            paint(MODE_ERASE if erase else MODE_DRAW)
    
    elif event is InputEventKey:
        if not event.echo and event.keycode == KEY_SHIFT:
            whole_room = event.pressed
            use_cursor = super_use_cursor and not whole_room
            if whole_room:
                update_hovered_room()
            else:
                highlighted_room.clear()
            
            editor.map_overlay.queue_redraw()

func update_hovered_room():
    var hr := highlighted_room
    highlighted_room = MetSys.map_data.get_whole_room(get_coords(get_cursor_pos()))
    if highlighted_room != hr:
        editor.map_overlay.queue_redraw()

func paint(mode: int):
    var coords_to_modify: Array[Vector3i]
    if whole_room:
        coords_to_modify = highlighted_room
    else:
        coords_to_modify.assign([get_coords(get_cursor_pos())])
    
    var modified: bool
    for coords in coords_to_modify:
        var cell_data := MetSys.map_data.get_cell_at(coords)
        if not cell_data:
            continue
        
        if modify_cell(cell_data, mode) or modify_coords(coords, mode):
            modified = true
    
    if modified:
        mark_modified()
        editor.map.queue_redraw()

func modify_cell(cell_data: MetroidvaniaSystem.MapData.CellData, mode: int) -> bool:
    return false

func modify_coords(coords: Vector3i, mode: int) -> bool:
    return false