extends RefCounted
## Web export target: the preset exists, uses the non-threaded template (so it
## runs on plain static hosting without COOP/COEP headers), and the release
## scripts build and publish it.

func _preset() -> String:
	## Return the `[preset.N]` block whose name is Web plus its `.options` block.
	var lines := FileAccess.get_file_as_string("res://export_presets.cfg").split("\n")
	var sections := {}
	var current := ""
	var web_id := ""
	for line in lines:
		if line.begins_with("[") and line.ends_with("]"):
			current = line
			sections[current] = PackedStringArray()
			continue
		if sections.has(current):
			# PackedStringArray is a value type: mutate a local and write it back.
			var block: PackedStringArray = sections[current]
			block.append(line)
			sections[current] = block
			if line == 'name="Web"':
				web_id = current.trim_prefix("[").trim_suffix("]")
	if web_id == "":
		return ""
	var out: PackedStringArray = []
	out.append("[%s]" % web_id)
	out.append_array(sections.get("[%s]" % web_id, PackedStringArray()))
	var options := "[%s.options]" % web_id
	if sections.has(options):
		out.append(options)
		out.append_array(sections[options])
	return "\n".join(out)

func test_web_preset_exists() -> bool:
	var preset := _preset()
	var a := TestUtils.check(preset != "", "a Web export preset exists")
	var b := TestUtils.check(preset.contains('platform="Web"'), "preset targets the Web platform")
	var c := TestUtils.check(preset.contains('export_path="build/web/index.html"'), "preset writes build/web/index.html")
	return a and b and c

func test_web_preset_is_static_hosting_friendly() -> bool:
	var preset := _preset()
	return TestUtils.check(preset.contains("variant/thread_support=false"),
		"threads are disabled so no COOP/COEP headers are required")

func test_release_scripts_build_the_web_zip() -> bool:
	var build := FileAccess.get_file_as_string("res://tools/build_releases.sh")
	var a := TestUtils.check(build.contains('--export-release "Web"'), "build script exports Web")
	var b := TestUtils.check(build.contains("step-line-web-${VERSION}.zip"), "build script names the web zip")
	var publish := FileAccess.get_file_as_string("res://tools/publish_release.sh")
	var c := TestUtils.check(publish.contains("step-line-web-$VERSION.zip"), "publish script uploads the web zip")
	return a and b and c

func test_web_build_files_present_when_exported() -> bool:
	## Only asserts shape if a web build exists in build/web (created by the
	## release script); missing build output is not a test failure by itself.
	var index := "res://build/web/index.html"
	if not FileAccess.file_exists(index):
		return true
	var html := FileAccess.get_file_as_string(index)
	var a := TestUtils.check(html.contains("index.js"), "index.html loads index.js")
	var b := TestUtils.check(FileAccess.file_exists("res://build/web/index.wasm"), "wasm payload exists")
	var c := TestUtils.check(FileAccess.file_exists("res://build/web/index.pck"), "pck payload exists")
	return a and b and c