/*************************************************************************/
/*  test_theme.h                                                         */
/*************************************************************************/
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#ifndef TEST_THEME_H
#define TEST_THEME_H

#include "scene/resources/theme.h"
#include "tests/test_tools.h"

#include "thirdparty/doctest/doctest.h"

namespace TestTheme {

class Fixture {
public:
	struct DataEntry {
		Theme::DataType type;
		Variant value;
	} const valid_data[Theme::DATA_TYPE_MAX] = {
		{ Theme::DATA_TYPE_COLOR, Color() },
		{ Theme::DATA_TYPE_CONSTANT, 42 },
		{ Theme::DATA_TYPE_FONT, Ref<Font>(memnew(Font)) },
		{ Theme::DATA_TYPE_FONT_SIZE, 42 },
		{ Theme::DATA_TYPE_ICON, Ref<Texture>(memnew(ImageTexture)) },
		{ Theme::DATA_TYPE_STYLEBOX, Ref<StyleBox>(memnew(StyleBoxFlat)) },
	};

	const StringName valid_item_name = "valid_item_name";
	const StringName valid_type_name = "ValidTypeName";
};

TEST_CASE_FIXTURE(Fixture, "[Theme] Good theme type names") {
	StringName names[] = {
		"", // Empty name.
		"CapitalizedName",
		"snake_cased_name",
		"42",
		"_Underscore_",
	};

	SUBCASE("add_type") {
		for (const StringName &name : names) {
			Ref<Theme> theme = memnew(Theme);

			ErrorDetector ed;
			theme->add_type(name);
			CHECK_FALSE(ed.has_error);
		}
	}

	SUBCASE("set_theme_item") {
		for (const StringName &name : names) {
			for (const DataEntry &entry : valid_data) {
				Ref<Theme> theme = memnew(Theme);

				ErrorDetector ed;
				theme->set_theme_item(entry.type, valid_item_name, name, entry.value);
				CHECK_FALSE(ed.has_error);
			}
		}
	}

	SUBCASE("add_theme_item_type") {
		for (const StringName &name : names) {
			for (const DataEntry &entry : valid_data) {
				Ref<Theme> theme = memnew(Theme);

				ErrorDetector ed;
				theme->add_theme_item_type(entry.type, name);
				CHECK_FALSE(ed.has_error);
			}
		}
	}

	SUBCASE("set_type_variation") {
		for (const StringName &name : names) {
			Ref<Theme> theme = memnew(Theme);

			ErrorDetector ed;
			theme->set_type_variation(valid_type_name, name);
			CHECK(ed.has_error == (name == StringName()));
		}
		for (const StringName &name : names) {
			Ref<Theme> theme = memnew(Theme);

			ErrorDetector ed;
			theme->set_type_variation(name, valid_type_name);
			CHECK(ed.has_error == (name == StringName()));
		}
	}
}

TEST_CASE_FIXTURE(Fixture, "[Theme] Bad theme type names") {
	StringName names[] = {
		"With/Slash",
		"With Space",
		"With@various$symbols!",
		String::utf8("contains_汉字"),
	};

	SUBCASE("add_type") {
		for (const StringName &name : names) {
			Ref<Theme> theme = memnew(Theme);

			ErrorDetector ed;
			theme->add_type(name);
			CHECK(ed.has_error);
		}
	}

	SUBCASE("set_theme_item") {
		for (const StringName &name : names) {
			for (const DataEntry &entry : valid_data) {
				Ref<Theme> theme = memnew(Theme);

				ErrorDetector ed;
				theme->set_theme_item(entry.type, valid_item_name, name, entry.value);
				CHECK(ed.has_error);
			}
		}
	}

	SUBCASE("add_theme_item_type") {
		for (const StringName &name : names) {
			for (const DataEntry &entry : valid_data) {
				Ref<Theme> theme = memnew(Theme);

				ErrorDetector ed;
				theme->add_theme_item_type(entry.type, name);
				CHECK(ed.has_error);
			}
		}
	}

	SUBCASE("set_type_variation") {
		for (const StringName &name : names) {
			Ref<Theme> theme = memnew(Theme);

			ErrorDetector ed;
			theme->set_type_variation(valid_type_name, name);
			CHECK(ed.has_error);
		}
		for (const StringName &name : names) {
			Ref<Theme> theme = memnew(Theme);

			ErrorDetector ed;
			theme->set_type_variation(name, valid_type_name);
			CHECK(ed.has_error);
		}
	}
}

TEST_CASE_FIXTURE(Fixture, "[Theme] Good theme item names") {
	StringName names[] = {
		"CapitalizedName",
		"snake_cased_name",
		"42",
		"_Underscore_",
	};

	SUBCASE("set_theme_item") {
		for (const StringName &name : names) {
			for (const DataEntry &entry : valid_data) {
				Ref<Theme> theme = memnew(Theme);

				ErrorDetector ed;
				theme->set_theme_item(entry.type, name, valid_type_name, entry.value);
				CHECK_FALSE(ed.has_error);
				CHECK(theme->has_theme_item(entry.type, name, valid_type_name));
			}
		}
	}

	SUBCASE("rename_theme_item") {
		for (const StringName &name : names) {
			for (const DataEntry &entry : valid_data) {
				Ref<Theme> theme = memnew(Theme);
				theme->set_theme_item(entry.type, valid_item_name, valid_type_name, entry.value);

				ErrorDetector ed;
				theme->rename_theme_item(entry.type, valid_item_name, name, valid_type_name);
				CHECK_FALSE(ed.has_error);
				CHECK_FALSE(theme->has_theme_item(entry.type, valid_item_name, valid_type_name));
				CHECK(theme->has_theme_item(entry.type, name, valid_type_name));
			}
		}
	}
}

TEST_CASE_FIXTURE(Fixture, "[Theme] Bad theme item names") {
	StringName names[] = {
		"", // Empty name.
		"With/Slash",
		"With Space",
		"With@various$symbols!",
		String::utf8("contains_汉字"),
	};

	SUBCASE("set_theme_item") {
		for (const StringName &name : names) {
			for (const DataEntry &entry : valid_data) {
				Ref<Theme> theme = memnew(Theme);

				ErrorDetector ed;
				theme->set_theme_item(entry.type, name, valid_type_name, entry.value);
				CHECK(ed.has_error);
				CHECK_FALSE(theme->has_theme_item(entry.type, name, valid_type_name));
			}
		}
	}

	SUBCASE("rename_theme_item") {
		for (const StringName &name : names) {
			for (const DataEntry &entry : valid_data) {
				Ref<Theme> theme = memnew(Theme);
				theme->set_theme_item(entry.type, valid_item_name, valid_type_name, entry.value);

				ErrorDetector ed;
				theme->rename_theme_item(entry.type, valid_item_name, name, valid_type_name);
				CHECK(ed.has_error);
				CHECK(theme->has_theme_item(entry.type, valid_item_name, valid_type_name));
				CHECK_FALSE(theme->has_theme_item(entry.type, name, valid_type_name));
			}
		}
	}
}

} // namespace TestTheme

#endif // TEST_THEME_H