class_name TestUIStrings
extends GdUnitTestSuite

# Tests for ticket #409: UI string loading system.
# Covers YAML parsing, autoload lookup, and fallback behavior.


# -- YAML parser: basic behavior --

func test_parse_simple_key_value() -> void:
	var yaml := "section:\n  key: value"
	var result := UIStrings._parse_yaml(yaml)
	assert_that(result.has("section.key")).is_true()
	assert_that(result["section.key"]).is_equal("value")

func test_parse_quoted_value() -> void:
	var yaml := "section:\n  key: \"hello world\""
	var result := UIStrings._parse_yaml(yaml)
	assert_that(result["section.key"]).is_equal("hello world")

func test_parse_multiple_sections() -> void:
	var yaml := "hud:\n  mode: Mode\ninteraction:\n  talk: Talk"
	var result := UIStrings._parse_yaml(yaml)
	assert_that(result.has("hud.mode")).is_true()
	assert_that(result.has("interaction.talk")).is_true()
	assert_that(result["hud.mode"]).is_equal("Mode")
	assert_that(result["interaction.talk"]).is_equal("Talk")

func test_parse_skips_comments() -> void:
	var yaml := "# comment\nsection:\n  key: value\n  # another comment"
	var result := UIStrings._parse_yaml(yaml)
	assert_that(result.size()).is_equal(1)

func test_parse_skips_empty_lines() -> void:
	var yaml := "section:\n\n  key: value\n\n"
	var result := UIStrings._parse_yaml(yaml)
	assert_that(result["section.key"]).is_equal("value")

func test_parse_empty_string() -> void:
	var result := UIStrings._parse_yaml("")
	assert_that(result.size()).is_equal(0)

func test_parse_value_with_colon() -> void:
	var yaml := "hud:\n  time: \"12:30\""
	var result := UIStrings._parse_yaml(yaml)
	assert_that(result["hud.time"]).is_equal("12:30")

func test_parse_multiple_keys_per_section() -> void:
	var yaml := "hud:\n  mode: Mode\n  time: Time\n  health: Health"
	var result := UIStrings._parse_yaml(yaml)
	assert_that(result.size()).is_equal(3)
	assert_that(result["hud.mode"]).is_equal("Mode")
	assert_that(result["hud.time"]).is_equal("Time")
	assert_that(result["hud.health"]).is_equal("Health")


# -- YAML parser: nested sections --

func test_parse_nested_sections() -> void:
	var yaml := "states:\n  unknown:\n    label: \"Unknown\"\n    description: \"No prior contact.\""
	var result := UIStrings._parse_yaml(yaml)
	assert_that(result.has("states.unknown.label")).is_true()
	assert_that(result["states.unknown.label"]).is_equal("Unknown")
	assert_that(result["states.unknown.description"]).is_equal("No prior contact.")

func test_parse_nested_multiple_subsections() -> void:
	var yaml := "states:\n  a:\n    x: \"1\"\n  b:\n    x: \"2\""
	var result := UIStrings._parse_yaml(yaml)
	assert_that(result["states.a.x"]).is_equal("1")
	assert_that(result["states.b.x"]).is_equal("2")

func test_parse_mixed_flat_and_nested() -> void:
	var yaml := "hud:\n  health: \"Condition\"\n  health_values:\n    full: \"Normal\"\n    critical: \"Critical\""
	var result := UIStrings._parse_yaml(yaml)
	assert_that(result["hud.health"]).is_equal("Condition")
	assert_that(result["hud.health_values.full"]).is_equal("Normal")
	assert_that(result["hud.health_values.critical"]).is_equal("Critical")

func test_parse_inline_comment_quoted() -> void:
	var yaml := "hud:\n  prefix: \"\"            # No prefix"
	var result := UIStrings._parse_yaml(yaml)
	assert_that(result.has("hud.prefix")).is_true()
	assert_that(result["hud.prefix"]).is_equal("")

func test_parse_inline_comment_unquoted() -> void:
	var yaml := "hud:\n  mode: Standard # default mode"
	var result := UIStrings._parse_yaml(yaml)
	assert_that(result["hud.mode"]).is_equal("Standard")

func test_parse_quoted_empty_string() -> void:
	var yaml := "section:\n  key: \"\""
	var result := UIStrings._parse_yaml(yaml)
	assert_that(result.has("section.key")).is_true()
	assert_that(result["section.key"]).is_equal("")


# -- Autoload: registration and file loading --

func test_autoload_registered() -> void:
	assert_that(UIStrings).is_not_null()

func test_autoload_loaded_strings() -> void:
	assert_that(UIStrings.has_key("hud.health")).is_true()

func test_get_text_returns_value() -> void:
	assert_that(UIStrings.get_text("hud.health")).is_equal("Condition")

func test_get_text_interaction_verb() -> void:
	assert_that(UIStrings.get_text("interaction_verbs.talk")).is_equal("Talk")

func test_get_text_missing_key_returns_key() -> void:
	var result := UIStrings.get_text("nonexistent.key")
	assert_that(result).is_equal("nonexistent.key")

func test_get_all_keys_not_empty() -> void:
	assert_that(UIStrings.get_all_keys().size()).is_greater(0)

func test_has_key_true_for_existing() -> void:
	assert_that(UIStrings.has_key("interaction_verbs.talk")).is_true()

func test_has_key_false_for_missing() -> void:
	assert_that(UIStrings.has_key("nonexistent.key")).is_false()

func test_nested_key_exists() -> void:
	assert_that(UIStrings.has_key("relationship_states.unknown.label")).is_true()

func test_nested_key_value() -> void:
	assert_that(UIStrings.get_text("relationship_states.unknown.label")).is_equal("Unknown")