// 批次 2V0-g: the 40250 font path (CGraphicText → CGraphicFontTexture → CGraphicDib) over the GDI
// emulation in platform/Win32Gdi.cpp, and the code-page conversions CGraphicTextInstance runs text through.
//
// Needs a system Tahoma (macOS ships /System/Library/Fonts/Supplemental/Tahoma.ttf); exit 77 (ctest
// SKIP) without one, unless MT_ASSETS_STRICT=1.
#include "EterLib/StdAfx.h"
#include "EterLib/GrpText.h"
#include "EterLib/GrpTextInstance.h"
#include "EterLib/Util.h"
#include "EterLib/ResourceManager.h"
#include "../src/platform/EterLib/UIRenderCommands.h"
#include "../src/platform/UserInterface/UserInterface.h"

#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <string>

#include <unistd.h>

static int g_failures = 0;
#define CHECK(cond)                                                    \
	do {                                                               \
		if (!(cond)) {                                                 \
			std::fprintf(stderr, "%s:%d: CHECK(%s)\n", __FILE__, __LINE__, #cond); \
			++g_failures;                                              \
		}                                                              \
	} while (0)

static void code_pages()
{
	// CP949 "굴림" (B1BC B8B2) → U+AD74 U+B9BC, and back.
	const char gulim[] = "\xb1\xbc\xb8\xb2";
	WCHAR wide[8] = {};
	CHECK(MultiByteToWideChar(949, 0, gulim, -1, nullptr, 0) == 3);
	CHECK(MultiByteToWideChar(949, 0, gulim, -1, wide, 8) == 3);
	CHECK(wide[0] == 0xAD74 && wide[1] == 0xB9BC && wide[2] == 0);
	char narrow[8] = {};
	CHECK(WideCharToMultiByte(949, 0, wide, -1, narrow, sizeof(narrow), nullptr, nullptr) == 5);
	CHECK(std::string(narrow) == gulim);

	// UTF-8 and the Windows size rules: a too-small buffer answers 0.
	CHECK(MultiByteToWideChar(CP_UTF8, 0, "\xea\xb5\xb4", 3, wide, 8) == 1 && wide[0] == 0xAD74);
	CHECK(MultiByteToWideChar(CP_UTF8, 0, "abc", 3, wide, 2) == 0);
	// CP1252 0x80 is the euro sign.
	CHECK(MultiByteToWideChar(1252, 0, "\x80", 1, wide, 8) == 1 && wide[0] == 0x20AC);

	// 40250 Util.cpp face table.
	CHECK(SetDefaultCodePage(949) && std::string(GetDefaultFontFace()) == "GulimChe");
	CHECK(GetCharsetFromCodePage(949) == HANGUL_CHARSET);
	CHECK(SetDefaultCodePage(1252) && std::string(GetDefaultFontFace()) == "Arial");
	CHECK(GetDefaultCodePage() == 1252);
}

static int glyph_quads(float* min_x, float* max_x)
{
	int count = 0;
	*min_x = 1e9f;
	*max_x = -1e9f;
	for (const auto& command : UIRenderCommands())
	{
		if (command.kind != UIRenderCommand::Image || command.text.rfind("mem:", 0) != 0)
			continue;
		++count;
		for (float x : command.qx)
		{
			*min_x = std::fmin(*min_x, x);
			*max_x = std::fmax(*max_x, x);
		}
	}
	return count;
}

int main()
{
	const char* strict = std::getenv("MT_ASSETS_STRICT");
	const bool is_strict = strict && std::string(strict) == "1";

	PackSingletons();
	CResourceManager resource_manager; // CResource::Release queues the resource here
	code_pages();

	if (access("/System/Library/Fonts/Supplemental/Tahoma.ttf", 0) != 0)
	{
		std::fprintf(stderr, "port_text_test: no system Tahoma\n");
		return g_failures ? 1 : (is_strict ? 1 : 77);
	}

	// Not in any pack: CResource::Load falls through to OnLoad(0, NULL), as for every 40250 .fnt.
	CGraphicText* text = new CGraphicText("Tahoma:12.fnt");
	text->AddReference();
	text->Load();
	CHECK(!text->IsEmpty());

	CGraphicTextInstance instance;
	instance.SetTextPointer(text);
	instance.SetValue("Hello");
	instance.Update();
	int width = 0, height = 0;
	instance.GetTextSize(&width, &height);
	// GDI lays a 12-pixel LOGFONT cell out as Tahoma's win ascent + descent at 10 ppem: 12 rows.
	CHECK(height == 12);
	CHECK(width > 20 && width < 40);
	CHECK(instance.PixelPositionToCharacterPosition(0) == 0);
	CHECK(instance.PixelPositionToCharacterPosition(width - 1) == 4);
	CHECK(instance.PixelPositionToCharacterPosition(width + 5) == -1);

	UIRenderSetSize(800, 600);
	UIRenderBeginFrame();
	instance.SetPosition(100.0f, 50.0f);
	instance.Render();
	float left = 0, right = 0;
	CHECK(glyph_quads(&left, &right) == 5);
	CHECK(std::fabs(left - 100.0f) <= 1.5f);

	// Centred: the text straddles the position.
	instance.SetHorizonalAlign(CGraphicTextInstance::HORIZONTAL_ALIGN_CENTER);
	instance.Update();
	UIRenderBeginFrame();
	instance.Render();
	CHECK(glyph_quads(&left, &right) == 5);
	CHECK(left < 100.0f && right > 100.0f && std::fabs((left + right) * 0.5f - 100.0f) <= 2.0f);

	// The glyph page has ink.
	bool inked = false;
	for (const auto& command : UIRenderCommands())
	{
		UIMemoryTexture page;
		if (command.text.rfind("mem:", 0) == 0 && UIRenderMemoryTexture(command.text, &page))
			for (std::uint32_t argb : page.argb)
				inked |= (argb >> 24) != 0;
	}
	CHECK(inked);

	instance.Destroy();
	text->Release();

	if (g_failures)
	{
		std::fprintf(stderr, "%d check(s) failed\n", g_failures);
		return 1;
	}
	std::printf("port_text_test: ok\n");
	return 0;
}