extends SceneTree

var checks: int = 0
var failures: int = 0

func _initialize() -> void:
    call_deferred("run")

func check(value: bool, message: String) -> void:
    checks += 1
    if not value:
        failures += 1
        push_error(message)

func run() -> void:
    var scene = load("res://world/world.tscn").instantiate()
    var stage = scene.get_node("Stage")
    stage.owniverse.free()
    stage.set_script(load("res://tests/fixtures/ui_stage.gd"))
    root.add_child(scene)
    await process_frame
    await process_frame
    stage.stage_page_scroller.scroll_horizontal = stage.PAGE_WIDTH
    await process_frame
    stage.owniverse.state.amount.H = 1000.0
    stage.owniverse.state.amount.RD = 2.0
    stage.owniverse.refresh_item_amounts()
    stage._update_ui(0.0)
    var hydrogen = stage.owniverse_items.H
    var dwarf = stage.owniverse_items.RD
    check(hydrogen.description.text == "1 000", "Visible page updates immediately on navigation")
    check(dwarf.description.text == "", "Offscreen counters are not rendered")
    stage.owniverse.state.amount.H = 2000.0
    stage.owniverse.refresh_item_amounts()
    check(stage.owniverse.item_amounts_dirty and stage.owniverse.items_to_update.H == 1000.0, "Simulation invalidates without recalculating display sums")
    stage._update_ui(0.05)
    check(hydrogen.description.text == "1 000", "No refresh before interval")
    stage._update_ui(0.051)
    check(hydrogen.description.text == "2 000" and not stage.owniverse.item_amounts_dirty, "Latest state appears at interval")
    stage.item_activated(hydrogen)
    check(hydrogen.description.text == root.get_node("Global").format_number(stage.owniverse.state.amount.H), "Player production updates counter immediately")
    check(stage.owniverse.state.amount.H > 2000.0, "Production action actually executed")
    dwarf.visible = true
    stage.stage_page_scroller.scroll_horizontal = 2 * stage.PAGE_WIDTH
    await process_frame
    stage._update_ui(0.0)
    check(dwarf.description.text == "2", "Newly visible page receives cached latest values")
    stage.owniverse.state.time.year = 1234.5
    stage._update_ui(0.1)
    check(stage.date_time.text == "1 234.5", "Time uses throttled display with tenths")
    for entity in stage.owniverse.entities.values(): entity.free()
    stage.owniverse.free()
    scene.free()
    print("UI updates: %d checks, %d failures" % [checks, failures])
    quit(0 if failures == 0 else 1)