extends VBoxContainer

const Style := preload("res://scripts/ui/ui_style.gd")
var main: Control
var title: Label
var score_body: RichTextLabel
var timeline_body: RichTextLabel
var references: VBoxContainer
var report_dialog: Control
var report_button: Button
var current_attempt := {}
var status: Label
var starting_case := false

func _ready() -> void:
	set_anchors_preset(Control.PRESET_FULL_RECT); add_theme_constant_override("separation", 10)
	var toolbar := HBoxContainer.new(); toolbar.add_theme_constant_override("separation", 8); add_child(toolbar)
	title = Label.new(); title.size_flags_horizontal = Control.SIZE_EXPAND_FILL; Style.set_label(title, 30, Style.TEXT); toolbar.add_child(title)
	var smaller := Button.new(); smaller.text = "A-"; smaller.tooltip_text = "Decrease text size"; smaller.pressed.connect(_zoom.bind(-CCSService.TEXT_SCALE_STEP)); toolbar.add_child(smaller)
	var larger := Button.new(); larger.text = "A+"; larger.tooltip_text = "Increase text size"; larger.pressed.connect(_zoom.bind(CCSService.TEXT_SCALE_STEP)); toolbar.add_child(larger)
	var clear := Button.new(); clear.text = "Clear"; clear.tooltip_text = "Clear highlights"; clear.pressed.connect(_clear_highlights); toolbar.add_child(clear)
	report_button = Button.new(); report_button.text = "Report"; report_button.tooltip_text = "Report CCS case"; report_button.pressed.connect(_report); toolbar.add_child(report_button)
	var scroll := ScrollContainer.new(); scroll.size_flags_vertical = Control.SIZE_EXPAND_FILL; add_child(scroll)
	var content := VBoxContainer.new(); content.size_flags_horizontal = Control.SIZE_EXPAND_FILL; content.add_theme_constant_override("separation", 14); scroll.add_child(content)
	score_body = _study_label("score"); score_body.custom_minimum_size.y = 200; content.add_child(score_body)
	timeline_body = _study_label("timeline"); timeline_body.custom_minimum_size.y = 260; content.add_child(timeline_body)
	references = VBoxContainer.new(); content.add_child(references)
	CCSService.attempt_changed.connect(_refresh_loaded_attempt); CCSService.report_submitted.connect(_report_submitted)
	report_dialog = preload("res://scripts/ui/ccs_report_dialog.gd").new(); add_child(report_dialog)
	var row := HBoxContainer.new(); add_child(row)
	var cases := Button.new(); cases.text = "Another Case"; Style.style_primary_button(cases); cases.pressed.connect(_another_case); row.add_child(cases)
	var back := Button.new(); back.text = "Back to Step 3 Modes"; back.pressed.connect(func(): main.show_screen("selection", "step3")); row.add_child(back)
	status = Label.new(); Style.set_label(status, 14, Style.RED); row.add_child(status)
	CCSService.request_failed.connect(_request_failed)

func _study_label(region: String) -> RichTextLabel:
	var label := RichTextLabel.new(); label.bbcode_enabled = true; label.fit_content = true; label.selection_enabled = true; label.set_meta("ccs_region", region); label.gui_input.connect(_text_input.bind(label)); return label

func on_show(payload: Variant = null) -> void:
	starting_case = false
	if status != null: status.text = ""
	if typeof(payload) == TYPE_STRING: CCSService.load_attempt(str(payload)); return
	current_attempt = payload if typeof(payload) == TYPE_DICTIONARY else CCSService.attempt
	if current_attempt.is_empty(): return
	var score: Dictionary = current_attempt.get("score", {})
	title.text = "%s: %d%%" % [current_attempt.get("caseTitle", "Case review"), int(round(float(score.get("percent", 0))))]
	_render_text(); _render_references(); _apply_text_scale()

func _score_plain() -> String:
	var score: Dictionary = current_attempt.get("score", {})
	var lines: Array[String] = ["Case result: %d/%d points (%.0f%%)" % [score.get("earnedPoints", 0), score.get("possiblePoints", 0), score.get("percent", 0)]]
	var rating: Dictionary = current_attempt.get("rating", {})
	if bool(rating.get("rated", false)):
		lines.append("CCS ELO: %d  (%+d)" % [rating.get("userElo", 1000), rating.get("userEloDelta", 0)])
	else:
		lines.append("CCS ELO unchanged: this case was not rating-eligible.")
	for criterion in current_attempt.get("score", {}).get("criteria", []):
		var observed := str(criterion.get("observedAction", "Not performed"))
		if criterion.get("observedMinute", null) != null: observed += " at minute %d" % criterion.get("observedMinute", 0)
		lines.append("%s: %s  %s%d\nExpected: %s\nObserved: %s\n%s" % [criterion.get("title", criterion.get("criterionId", "Criterion")), str(criterion.get("status", "missed")).capitalize(), "+" if int(criterion.get("points", 0)) >= 0 else "", criterion.get("points", 0), criterion.get("expectedAction", ""), observed, criterion.get("rationale", "")])
	return "\n\n".join(lines)

func _timeline_plain() -> String:
	var lines: Array[String] = ["Case timeline"]
	for entry in current_attempt.get("chart", []): lines.append("T+%d [%s] %s" % [entry.get("simulatedMinute", 0), entry.get("category", "note"), entry.get("text", "")])
	return "\n\n".join(lines)

func _render_text() -> void:
	var id := str(current_attempt.get("id", ""))
	score_body.text = CCSService.highlighted_text(id, "score", _score_plain())
	timeline_body.text = CCSService.highlighted_text(id, "timeline", _timeline_plain())

func _render_references() -> void:
	for child in references.get_children(): child.queue_free()
	if current_attempt.get("references", []).is_empty(): return
	var heading := Label.new(); heading.text = "References"; Style.set_label(heading, int(round(19.0 * CCSService.text_scale)), Style.TEXT); references.add_child(heading)
	for reference in current_attempt.get("references", []):
		var link := LinkButton.new(); link.text = str(reference.get("title", reference.get("url", "Reference"))); link.pressed.connect(OS.shell_open.bind(str(reference.get("url", "")))); link.add_theme_font_size_override("font_size", int(round(16.0 * CCSService.text_scale))); references.add_child(link)

func _text_input(event: InputEvent, label: RichTextLabel) -> void:
	var mouse := event as InputEventMouseButton
	if mouse != null and mouse.button_index == MOUSE_BUTTON_LEFT and not mouse.pressed: call_deferred("_commit_selection", label)

func _commit_selection(label: RichTextLabel) -> void:
	if label.get_selected_text().strip_edges().is_empty(): return
	var start := label.get_selection_from(); var end := label.get_selection_to()
	CCSService.toggle_highlight(str(current_attempt.get("id", "")), str(label.get_meta("ccs_region", "")), mini(start,end), maxi(start,end)); label.deselect(); _render_text()

func _zoom(delta: float) -> void:
	CCSService.adjust_text_scale(delta); _apply_text_scale(); _render_references()

func _apply_text_scale() -> void:
	var font_size := int(round(18.0 * CCSService.text_scale))
	for label in [score_body, timeline_body]: label.add_theme_font_size_override("normal_font_size", font_size); label.add_theme_font_size_override("bold_font_size", font_size)

func _clear_highlights() -> void:
	CCSService.clear_highlights(str(current_attempt.get("id", ""))); _render_text()

func _report() -> void: report_dialog.show_for(str(current_attempt.get("id", "")))
func _report_submitted(_id: String) -> void: Style.style_chip(report_button, Style.RED); report_button.tooltip_text = "Report submitted; report another issue"
func _refresh_loaded_attempt() -> void:
	if not visible: return
	if starting_case and str(CCSService.attempt.get("state", "")) in ["active", "final_orders"]:
		starting_case = false; main.show_screen("ccs_player"); return
	if str(CCSService.attempt.get("state", "")) == "completed": on_show(CCSService.attempt)

func _another_case() -> void:
	if starting_case: return
	starting_case = true
	status.text = "Loading a random timed case..."
	CCSService.create_attempt("", "timed")

func _request_failed(message: String) -> void:
	if not visible or not starting_case: return
	starting_case = false
	status.text = message