// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
// SPDX-License-Identifier: CC-BY-NC-ND-4.0

#pragma once

#include "common/heap_array.h"
#include "common/small_string.h"
#include "common/types.h"

#include <ctime>
#include <functional>
#include <optional>
#include <string>
#include <string_view>

class Error;

namespace Host {
/// Returns true if the specified resource file exists.
bool ResourceFileExists(std::string_view filename, bool allow_override);

/// Reads a file from the resources directory of the application.
/// This may be outside of the "normal" filesystem on platforms such as Mac.
std::optional<DynamicHeapArray<u8>> ReadResourceFile(std::string_view filename, bool allow_override,
                                                     Error* error = nullptr);

/// Reads a resource file file from the resources directory as a string.
std::optional<std::string> ReadResourceFileToString(std::string_view filename, bool allow_override,
                                                    Error* error = nullptr);

/// Returns the modified time of a resource.
std::optional<std::time_t> GetResourceFileTimestamp(std::string_view filename, bool allow_override);

/// Reads a potentially-compressed file from the resources directory of the application.
std::optional<DynamicHeapArray<u8>> ReadCompressedResourceFile(std::string_view filename, bool allow_override,
                                                               Error* error = nullptr);

/// Reports a fatal error on the main thread. This does not assume that the main window exists,
/// unlike ReportErrorAsync(), and will exit the application after the popup is closed.
void ReportFatalError(std::string_view title, std::string_view message);

/// Displays an asynchronous error on the UI thread, i.e. doesn't block the caller.
void ReportErrorAsync(std::string_view title, std::string_view message);

/// Displays a synchronous confirmation on the UI thread, i.e. blocks the caller.
bool ConfirmMessage(std::string_view title, std::string_view message);

/// Displays an asynchronous confirmation on the UI thread, but does not block the caller.
/// The callback may be executed on a different thread. Use RunOnCPUThread() in the callback to ensure safety.
using ConfirmMessageAsyncCallback = std::function<void(bool)>;
void ConfirmMessageAsync(std::string_view title, std::string_view message, ConfirmMessageAsyncCallback callback);

/// Returns the user agent to use for HTTP requests.
std::string GetHTTPUserAgent();

/// Opens a URL, using the default application.
void OpenURL(std::string_view url);

/// Returns the current contents of the clipboard as UTF-8 text, if any.
std::string GetClipboardText();

/// Copies the provided UTF-8 text to the host's clipboard, if present.
bool CopyTextToClipboard(std::string_view text);

/// Returns a localized version of the specified string within the specified context.
/// The pointer is guaranteed to be valid until the next language change.
const char* TranslateToCString(std::string_view context, std::string_view msg, std::string_view disambiguation = {});

/// Returns a localized version of the specified string within the specified context.
/// The view is guaranteed to be valid until the next language change.
/// NOTE: When passing this to fmt, positional arguments should be used in the base string, as
/// not all locales follow the same word ordering.
std::string_view TranslateToStringView(std::string_view context, std::string_view msg,
                                       std::string_view disambiguation = {});

/// Returns a localized version of the specified string within the specified context.
std::string TranslateToString(std::string_view context, std::string_view msg, std::string_view disambiguation = {});

/// Returns a localized version of the specified string within the specified context, adjusting for plurals using %n.
std::string TranslatePluralToString(const char* context, const char* msg, const char* disambiguation, int count);
SmallString TranslatePluralToSmallString(const char* context, const char* msg, const char* disambiguation, int count);

/// Clears the translation cache. All previously used strings should be considered invalid.
void ClearTranslationCache();

namespace Internal {
/// Implementation to retrieve a translated string.
s32 GetTranslatedStringImpl(std::string_view context, std::string_view msg, std::string_view disambiguation, char* tbuf,
                            size_t tbuf_space);
} // namespace Internal
} // namespace Host

// Helper macros for retrieving translated strings.
#define TRANSLATE(context, msg) Host::TranslateToCString(context, msg)
#define TRANSLATE_SV(context, msg) Host::TranslateToStringView(context, msg)
#define TRANSLATE_STR(context, msg) Host::TranslateToString(context, msg)
#define TRANSLATE_FS(context, msg) fmt::runtime(Host::TranslateToStringView(context, msg))
#define TRANSLATE_DISAMBIG(context, msg, disambiguation) Host::TranslateToCString(context, msg, disambiguation)
#define TRANSLATE_DISAMBIG_SV(context, msg, disambiguation) Host::TranslateToStringView(context, msg, disambiguation)
#define TRANSLATE_DISAMBIG_STR(context, msg, disambiguation) Host::TranslateToString(context, msg, disambiguation)
#define TRANSLATE_DISAMBIG_FS(context, msg, disambiguation)                                                            \
  fmt::runtime(Host::TranslateToStringView(context, msg, disambiguation))
#define TRANSLATE_PLURAL_STR(context, msg, disambiguation, count)                                                      \
  Host::TranslatePluralToString(context, msg, disambiguation, count)
#define TRANSLATE_PLURAL_SSTR(context, msg, disambiguation, count)                                                     \
  Host::TranslatePluralToSmallString(context, msg, disambiguation, count)
#define TRANSLATE_PLURAL_FS(context, msg, disambiguation, count)                                                       \
  fmt::runtime(Host::TranslatePluralToSmallString(context, msg, disambiguation, count).view())

// Does not translate the string at runtime, but allows the UI to in its own way.
#define TRANSLATE_NOOP(context, msg) msg
#define TRANSLATE_DISAMBIG_NOOP(context, msg, disambiguation) msg