class_name BattleFx
extends RefCounted
## Animationen und Töne des Kampfes aus den Spielereignissen.

var screen  # BattleScreen
var enabled := true


func _init(s) -> void:
    screen = s


func sfx(kind: String) -> void:
    screen.app.sfx.play(kind)


## Spielt die Ereignisse einer Aktion ab. centers: vorher gemerkte Positionen (für gestorbene Wesen).
func play_events(evs: Array, centers: Dictionary) -> void:
    var g: Game = screen.game
    var delay := 0.0
    for ev in evs:
        match ev.type:
            "attack":
                sfx("attack")
                var atk: CreatureView = screen.tiles.get(ev.attacker.uid)
                lunge(atk, center_of(ev.target, centers))
                flash_target(ev.target)
                delay = 0.12
            "damage":
                sfx("damage")
                popup("-%d" % ev.amount, Style.RED, center_of(ev.target, centers), delay)
            "heal":
                sfx("heal")
                popup("+%d" % ev.amount, Style.GREEN, center_of(ev.target, centers), delay)
            "buff":
                popup(ev.text, Style.GREEN, center_of(ev.target, centers), delay)
            "blocked":
                popup("Schild!", Style.BLUE, center_of(ev.target, centers), delay)
            "freeze":
                popup("Eis", Color("aaddff"), center_of(ev.target, centers), delay)
            "combo":
                sfx("combo")
                var where: Vector2 = screen.target_center({"kind": "creature", "uid": ev.uid})
                if where.x < 0:
                    where = screen.target_center({"kind": "player", "index": ev.player})
                popup("Feldkombo %s!" % ev.name, Style.GOLD, where + Vector2(0, -30), 0.1)
            "play":
                sfx("play")
            "spell":
                sfx("play")
                var caster: Game.Player = g.players[ev.player]
                popup(ev.card.name, Style.GOLD, screen.target_center({"kind": "player", "index": ev.player}), 0.0)
                if caster != screen.perspective:
                    screen.show_preview(ev.card, true)
                    screen.preview_timer = 1.6
            "trap_set":
                sfx("click")
                popup("Falle gelegt", Style.MUTED, screen.target_center({"kind": "player", "index": ev.player}), 0.0)
            "trap":
                sfx("combo")
                popup("Falle: %s!" % ev.card.name, Style.ORANGE, screen.target_center({"kind": "player", "index": ev.player}) + Vector2(0, -20), 0.0)
                screen.show_preview(ev.card, true)
                screen.preview_timer = 1.8
            "mulligan":
                if ev.count > 0:
                    popup("tauscht %d Karten" % ev.count, Style.MUTED, screen.target_center({"kind": "player", "index": ev.player}), 0.0)


func center_of(ref: Dictionary, centers: Dictionary) -> Vector2:
    var c: Vector2 = centers.get(screen.ref_key(ref), Vector2(-1, -1))
    if c.x < 0:
        c = screen.target_center(ref)
    return c


func popup(text: String, color: Color, at: Vector2, delay: float) -> void:
    if not enabled or at.x < 0:
        return
    var l := Label.new()
    l.text = text
    l.add_theme_font_size_override("font_size", 22)
    l.add_theme_font_override("font", Style.FONT_BOLD)
    l.add_theme_color_override("font_color", color)
    l.add_theme_color_override("font_outline_color", Color(0, 0, 0, 0.9))
    l.add_theme_constant_override("outline_size", 6)
    l.mouse_filter = Control.MOUSE_FILTER_IGNORE
    screen.fx_layer.add_child(l)
    l.reset_size()
    l.position = at - l.size / 2
    l.modulate.a = 0.0
    var tw: Tween = screen.create_tween()
    tw.tween_interval(delay)
    tw.tween_property(l, "modulate:a", 1.0, 0.08)
    tw.tween_property(l, "position:y", l.position.y - 44, 0.8).set_ease(Tween.EASE_OUT)
    tw.parallel().tween_property(l, "modulate:a", 0.0, 0.5).set_delay(0.35)
    tw.tween_callback(l.queue_free)


func lunge(tile: CreatureView, target: Vector2) -> void:
    if tile == null or not enabled or target.x < 0:
        return
    tile.busy = true
    var start := tile.slot
    var dest := start + (target - (start + tile.size / 2)) * 0.35
    var tw := tile.create_tween()
    tw.tween_property(tile, "position", dest, 0.12).set_ease(Tween.EASE_OUT)
    tw.tween_property(tile, "position", start, 0.15).set_ease(Tween.EASE_IN)
    tw.tween_callback(func():
        tile.busy = false
        tile.position = tile.slot)


func flash_target(ref: Dictionary) -> void:
    if not enabled:
        return
    if ref.kind == "creature":
        var tile: CreatureView = screen.tiles.get(ref.uid)
        if tile == null:
            return
        tile.flash = true
        tile.queue_redraw()
        var tw := tile.create_tween()
        tw.tween_interval(0.35)
        tw.tween_callback(func():
            tile.flash = false
            tile.queue_redraw())
    else:
        screen.flash_until[int(ref.index)] = Time.get_ticks_msec() + 350
        var tw: Tween = screen.create_tween()
        tw.tween_interval(0.37)
        tw.tween_callback(screen.refresh)


func pop_in(tile: CreatureView) -> void:
    if not enabled:
        return
    tile.scale = Vector2(0.2, 0.2)
    tile.modulate.a = 0.0
    var tw := tile.create_tween().set_parallel(true)
    tw.tween_property(tile, "scale", Vector2.ONE, 0.25).set_trans(Tween.TRANS_BACK).set_ease(Tween.EASE_OUT)
    tw.tween_property(tile, "modulate:a", 1.0, 0.15)


func fade_out(tile: CreatureView) -> void:
    tile.mouse_filter = Control.MOUSE_FILTER_IGNORE
    if not enabled:
        tile.queue_free()
        return
    var tw := tile.create_tween().set_parallel(true)
    tw.tween_property(tile, "modulate:a", 0.0, 0.3)
    tw.tween_property(tile, "scale", Vector2(0.6, 0.6), 0.3)
    tw.chain().tween_callback(tile.queue_free)


func move_to(tile: CreatureView, pos: Vector2) -> void:
    if enabled:
        screen.create_tween().tween_property(tile, "position", pos, 0.2)
    else:
        tile.position = pos