extends CanvasLayer
class_name Tutorial

const STEP_SCENE = preload("res://gui/game/tutorial/step_gui/step_gui.tscn")

signal succeded

var indicators : Array[InGameIndicator]
var player : Player
var region : Region
var game_gui : GameGui

var success = false

@onready var steps : Array[Step] = [
    Step.new(
        "MOVE_WITH_RIGHT_CLICK_OR_WASD",
        (func ():
            return player.global_position.distance_to(region.data.player_spawn) > 30)
    ),
    Step.new(
        "CHANGE_ZOOM_WITH_Z_X",
        (func ():
            return GameInfo.settings_data.zoom != 1.),
        (func (): GameInfo.game_data.player_data.inventory.add_item(Detector.new()))
    ),
    Step.new(
        "SELECT_ITEM_WITH_SCROLL_CLICK_OR_NUMBER",
        (func ():
            return player.data.inventory.current_item_ind != player.data.inventory.tools.size())
    ),
    Step.new(
        "LEFT_CLICK_TO_USE_ITEMS",
        (func ():
            return player.instruction is Player.ItemActionInstruction)
    ),
    Step.new(
        "USE_YOUR_DETECTOR_TO_FIND_THE_BATTERY",
        (func ():
            return player.position.distance_to(Vector2.ZERO) < 600)
    ),
    Step.new(
        "RECHARGE_IN_THE_RECHARGE_STATION",
        (func ():
            return region and region.data and not region.data.in_passing_day_animation and region.data.day != 1),
        (func (): 
            game_gui.show_energy()
            game_gui.show_help()
            game_gui.help.display_energy_tutorial()
            await game_gui.help.tutorial_passed
            GameInfo.game_data.player_data.inventory.add_item(Pickaxe.new()))
    ),
    Step.new(
        "DIG_A_TALION_VEIN_WITH_SHOVEL",
        (func ():
            for e in region.entity_container.get_children():
                if e is ItemObject and e.item is Seed:
                    return true
            return false)
    ),
    Step.new(
        "TAKE_A_SEED_BY_CLICKING_ON_IT",
        (func ():
            return player.data.inventory.seeds.find_custom(
                func(i:Item): return i is Seed
            ) != -1)
    ),
    Step.new(
        "DROP_SEED_WITH_KEY",
        (func ():
            return (
                Input.is_action_pressed("drop"))
            )
    ),
    Step.new(
        "PLANT_SEED_IN_FERTILE_ZONE",
        (func ():
            for e in region.entity_container.get_children():
                if e is Plant:
                    game_gui.help.display_plant_info_tutorial(e.card_info())
                    return true
            return false)
    ),
    Step.new(
        "WAIT_FOR_THE_PLANT_MATURATION",
        (func ():
            return region and region.data and not region.data.in_passing_day_animation and region.data.get_score() != 0),
        (func (): GameInfo.game_data.player_data.inventory.add_item(Fork.new()))
    ),
    Step.new(
        "HARVEST_A_MATURE_PLANT",
        (func ():
            for e in region.entity_container.get_children():
                if e is Plant and e.harvested:
                    return true
            return false)
    ),
    Step.new(
        "TAKE_HARVESTED_SEEDS",
        (func ():
            for s in player.data.inventory.seeds:
                if s is Seed and len(s.plant_mutations) > 0:
                    game_gui.help.display_mutations_tutorial(s.card_info())
                    return true
            return false),
        (func (): 
            await game_gui.help.tutorial_passed
            game_gui.show_progress_bar()
            game_gui.help.display_plant_point_tutorial())
    ),
    Step.new(
        "HAVE_3_PLANT_POINTS_SIMULTANEOUSLY",
        (func (): return region.data.get_score() >= 3)
    ),
]

func _ready():
    setup_gui()
    show()

    game_gui.show_energy(false)
    game_gui.show_progress_bar(false)
    game_gui.show_help(false)

func setup_gui():
    for s in %Steps.get_children():
        s.queue_free()

    for s in steps:
        var new_step = STEP_SCENE.instantiate() as TutorialStepGui
        new_step.suceeded = false
        new_step.text = s.get_text()
        %Steps.add_child(new_step)
    

func _process(_d):
    if success:
        hide()
    elif region and region.data and not success:
        var all_success = true
        for i in len(steps):
            var step := steps[i]
            var step_gui := %Steps.get_children()[i] as TutorialStepGui
            step_gui.visible = i == 0 or steps[i-1].succeeded
            if step_gui.visible:
                var old_succeeded = step.succeeded
                step.update_succeeded()
                if old_succeeded != step.succeeded: # Put a delay so two state don't collide
                    return
                step_gui.suceeded = step.succeeded
                if not step.succeeded:
                    game_gui.objective_text = step.text
                    all_success = false
        if all_success:
            finish_tutorial()

func finish_tutorial():
    region.data.state = RegionData.State.SUCCEEDED
    region.data.update()
    succeded.emit()
    success = true
    SteamConnection.unlock_achievement(SteamConnection.ACH_FINISH_TUTORIAL)

class Step:

    var text : String : get = get_text
    var is_step_over_callable : Callable
    var on_succeeded : Callable
    var succeeded = false

    func _init(
        _text : String = "",
        _is_step_over_callable : Callable = (func():return false),
        _on_succeeded : Callable = (func():return false)
    ):
        text = _text
        is_step_over_callable = _is_step_over_callable
        on_succeeded = _on_succeeded

    func get_text() -> String:
        return text

    func update_succeeded() -> bool:
        if not succeeded:
            succeeded = is_step_over_callable.call()
            if succeeded:
                on_succeeded.call()
        return succeeded