USING_SDL :: OS == .LINUX || OS == .MACOS;
USING_WINDOWS :: OS == .WINDOWS;

#if !USING_SDL && !USING_WINDOWS
  #assert false "Invalid configuration";

// The arena and fixed_arena suites live in modules/Basic/tests and arrive with LOAD_TESTS
// on the Basic import below.
#if COMPILE_TESTS {
  #load "test/testing.jai";
  #load "test/logger_tests.jai";
  #load "test/catalog_tests.jai";
  #load "test/ocr_tests.jai";
  #load "test/labels_tests.jai";
  #load "test/import_tests.jai";
}

#load "app/main.jai"; // entry point
#load "app/app_ui.jai";
#load "app/viewer.jai";
#load "app/ocr_ui.jai";
#load "app/catalog.jai";
#load "app/stats_ui.jai";
#load "app/background.jai";
#load "app/labels_ui.jai";
#load "app/import.jai";
#load "app/open_file.jai";
#load "app/segment_ui.jai";
#load "app/gpu_bench_ui.jai";          // the gpu-bench branch: the GPU Benchmark window
#load "../tools/gpu_bench/results.jai";  // its results files
#load "app/library_folders.jai";
#load "app/exit_shutdown.jai";
#load "app/screen_capture.jai";
#load "app/screen_record.jai";
#if OS == .WINDOWS  #load "app/screen_capture_win32.jai";
#if OS == .MACOS    #load "app/screen_capture_macos.jai";
#if OS == .WINDOWS  #load "app/screen_record_win32.jai";
#if OS == .MACOS    #load "app/screen_record_macos.jai";

#load "base/circle_buffer.jai";
#load "base/debug.jai";
#load "base/fonts.jai";
#load "base/log_queue.jai";
#load "base/logger.jai";
#load "base/prune_files.jai";

#load "ui/imgui.jai";
#load "ui/imgui_keyboard.jai";
#load "ui/imgui_theme.jai";
#load "ui/imgui_theme_file.jai";
#load "ui/imgui_theme_registry.jai";
#load "ui/imgui_theme_editor.jai";
#load "ui/imgui_toast.jai";
#load "ui/imgui_exit_overlay.jai";

#import "Atomics";
#import "Basic"()(MEMORY_DEBUGGER=false,ARENA_DEBUG=DEBUG,LOAD_TESTS=COMPILE_TESTS);
#import "Clipboard";
#import "String";
#import "Sort";
#import "Unicode";
#import "File";
#import "Random";   // the noise viewer_overwrite_and_delete writes
#import "Float16";  // label vectors are stored as 16-bit floats
#import "File_Utilities";
#import "Math";
#import "System";
#import "Thread";
#import "Hash_Table";
#import "Hash";   // fnv1a_hash, for the label list's hash
Default_Allocator :: #import "Default_Allocator";   // rpmalloc (modules/Default_Allocator), for thread_idle at the workers' waits
Shared_Channel :: #import "Shared_Memory_Channel";
#import "stb_image";
#import "stb_image_resize";
#import "Capture_File";   // the .mcap format, copied from D:\McapIndex\SnagitConverter
#import "Image_Decode";   // any image file to pixels: stb_image, and WIC on Windows
#import "Snagx";          // .snagx captures to .mcap, as SnagitConverter makes them
#import,dir "../modules/jaison/unicode_utils";   // is_valid_utf8
#import "OCR";
#import "Labels";
#import "Segment";
#import "Capture_Text";
#import "Base64";
#import "onnxruntime";
#if OS == .WINDOWS || OS == .MACOS  #import "Screen_Record";   // screen recording: Desktop Duplication or Windows.Graphics.Capture, to NVENC

// Basic's arenas import Secure_Memory at its defaults; this import adds its test suite.
using Secure_Memory :: #import "Secure_Memory"()(LOAD_TESTS=COMPILE_TESTS);

Graphics_Backend :: enum s32 {
  Unknown :: 0;
  DX11;
  Vulkan;
  OpenGL;
  Metal;
  DX12;
}

graphics_backend_from_string :: (name: string) -> Graphics_Backend {
  if name == {
    case "vulkan"; return .Vulkan;
    case "opengl"; return .OpenGL;
    case "metal";  return .Metal;
    case "direct3d11"; return .DX11;
    case "direct3d12"; return .DX12;
  }
  assert(false, "Unknown Graphics_Backend!");
  return .Unknown;
}

Memory_Usage :: struct {
  working_set: s64;
  virtual_memory: s64;
  peak_working_set: s64;
  peak_virtual_memory: s64;
}

perf: Perf;
Perf :: struct {
  backend: Graphics_Backend;
  renderer_name: string;
  adapter_name: string;         // e.g. "NVIDIA GeForce RTX 4070"; empty when the adapter could not be queried
  renderer_is_software: bool;
  time_to_first_frame_ms: float64;

  // See #WarpFirstStartup in graphics/DX11.jai. hw_device_ready_ms is measured from app.startup_time.
  started_on_warp: bool;
  startup_device_ms: float64;      // D3D11CreateDevice for the startup device
  startup_swap_chain_ms: float64;  // its swap chain and render target
  hw_device_create_ms: float64;
  hw_device_ready_ms: float64;
  hw_swap_ms: float64;

  memory_usage: Memory_Usage;

  frame_times: Circle_Buffer(Frame_Timing);
}

Frame_Timing :: struct {
  work:  float32; // seconds from the start of app_frame to just before Present (doesn't include vsync or swapchain waits)
  delta: float32; // io.DeltaTime: wall time since the previous frame, vsync wait included
}

PERF_FRAME_TIME_HISTORY :: 1024;

load_hardware_information :: () {
  { // Get CPU information:
    using cpu_info;
    physical_cpu_count     = get_number_of_processors(.ALL_PHYSICAL);
    logical_cpu_count      = get_number_of_processors(.ALL_LOGICAL);
    performance_cpu_count  = get_number_of_processors(.PERFORMANCE_PHYSICAL);
  }
  #if OS == .WINDOWS windows_get_cpu_information();
}

load_platform_information :: () {
  platform_load_platform_information();
}

cpu_info: CPU_Info;
CPU_Info :: struct {
  logical_cpu_count: s32;
  physical_cpu_count: s32;
  performance_cpu_count: s32;
}

CPUID_Type :: enum s32 {
  All         :: 0; // All Logical CPUs
  Performance :: 1;
  Efficiency  :: 2;

  // Top_Performance :: 64; // Typically two CPUs are marked with this value
}

platform: Platform; // Windows, MacOS, Linux

app: App;
App :: struct {
  frame_count: s64;
  startup_time: Apollo_Time;
  frame_time: Apollo_Time;

  win_scale: float32;
  minimized_to_tray: bool;
  was_minimized_to_tray: bool;   // as of the last frame; main.jai drops stale input when it changes
  vsync_on: bool = true;
  sleep_on_fast_frame: bool = false;
  should_exit: bool = false;

  show_debug_panel: bool = DEBUG;
  show_logger_panel: bool = DEBUG;
  show_frame_time_graph: bool = DEBUG;
  show_style_editor: bool;
  show_help_panel: bool;    // the Command Line window (base/debug.jai): -h, --help, or the Debug Panel
  help_panel_focus: bool;   // bring it forward next frame
  minimize_to_tray_this_frame: bool;
  restore_window_this_frame: bool;
  capture_region_this_frame: bool;   // the capture_region global hotkey fired: app/screen_capture.jai
  record_region_this_frame: bool;    // the record_region global hotkey fired: app/screen_record.jai
  is_master: bool; // Are we the first instance of this app launched?
  allow_multiple_instances: bool; // Skips the single-instance check, so a dev build can run beside an installed one.
  should_exit_early: bool;
  run_tests: bool;
  headless: bool;    // -headless (or a no_crash_dialog build): no message boxes on failures, and run_tests exits when done
  exit_code: s32;    // the process's exit code when the main loop ends
  library_folder: string;   // the .mcap folder the viewer shows: -library FOLDER, else [library] folder, else LIBRARY_FOLDER_DEFAULT
  scan_and_exit: bool;      // -scan: scan the library with the chosen OCR model once it has loaded, then exit (0, or 1 if any capture failed)
  stats_and_exit: bool;     // -stats: log the Statistics window's numbers once the catalog has loaded, then exit
  catalog_threads: s64;     // -catalog-threads N: workers loading the catalog at once, in place of all of the background group's (for measuring)
  cold_start: bool;
  no_catalog_cache: bool;   // -no-catalog-cache: read every capture from its file, as without the catalog cache (for measuring)
  launch_time: Apollo_Time; // monotonic, when main() started: the [startup] log lines count from it         // -cold: load the library as on a cold start, its files dropped from the system's file cache first
  start_search: string;     // -search QUERY: the search box's text at startup
  erase_and_exit: string;   // -erase ocr|labels|segments|all: erase that from the whole library once it has loaded, then exit
  record_and_exit: float64; // -record SECONDS: record the screen under the cursor that long, put it in the library, then exit (0, or 1 if it failed)
  #if OS == .WINDOWS  record_region: RECT;   // -record-region X Y W H: -record records that, on the virtual desktop, not the whole screen
  segment_and_exit: bool;   // -segment: segment the library folders set to segment once the catalog has loaded, then exit (0, or 1 if any image failed)
  import_source, import_dest: string;   // -import SOURCE DEST: import SOURCE into the library folder DEST (app/import.jai), then exit
  open_file: string;        // mcap.exe FILE: the file to show (app/open_file.jai); absolute, with / between its folders
  view_mode: bool;          // FILE was given while another instance runs: only it is shown, with Import (app/open_file.jai)
  open_import_dest: string; // -open-import DEST: FILE imported into the library folder DEST as its Import button does, then exit (0, or 1 if it failed)
  last_window_restore_time: Apollo_Time;

  imgui_context: *ImGui.ImGuiContext;

  write_channel: Shared_Channel.Write_Channel;
  read_channel: Shared_Channel.Read_Channel;
  read_channel_fatal_errors: s32;   // the first resets the queue, the second stops polling

  large_pages_allowed: bool;
  #if USING_WINDOWS {
    is_admin: bool;            // running with elevated privileges?
    ui_global_clear_color: [4]float : .[0.45, 0.55, 0.60, 1.00];
  } else #if USING_SDL {
    ui_global_clear_color: SDL_FColor = .{ r=0.45, g=0.55, b=0.60, a=1.0 };
  }

  program_data_dir: string;   // "<os program data>/<APP_FOLDER_NAME>"; see app_program_data_dir()
  machine_name: string;
  username: string;
  args: []string;
}

#if USING_SDL {
  // This uses SDL3 and SDL_GPU
  ImGui :: #import "imgui-sdl";

  #import "sdl3";
  #import "freetype";

  // Load the backend(s) you want. This *must* be #load because they might rely on other libraries.
  // In this case, sdl3_gpu3 relies on types from "sdl3", so by importing sdl3 and loading imgui, imgui
  // gets access to the types it needs.
  #load "backends/sdl3_gpu3.jai";
  #load "freetype/freetype.jai";

  #load "base/platform/sdl.jai";

  #load "base/platform/platform_posix.jai";
  #if OS == .LINUX {
    #load "base/platform/platform_linux.jai";
    POSIX :: #import "POSIX";
  }
  else #if OS == .MACOS {
    #load "base/platform/platform_macos.jai";
    #load "base/platform/macos_bindings.jai";
    #load "base/platform/macos_global_hotkeys.jai";
    POSIX :: #import "POSIX";
  }

  APP_TRAY_ICON_PATH :: "images/tray_icon.png";
}

#if USING_WINDOWS {
  // This uses Win32 API directly and DX11 for graphics
  ImGui :: #import "imgui-dx11-win32"()(DEBUG = DEBUG);

  #import "d3d11";
  #import "d3d_compiler";
  #import "dxgi";

  #import "Windows";
  #import "Windows_Utf8";

  #load "base/platform/platform_windows.jai";
  #load "base/platform/win32_bindings.jai";
  #load "base/platform/win32_gdi_bindings.jai";
  #load "graphics/DX11.jai";

  APP_TRAY_ICON_PATH :: "images/tray_icon.ico";
}

// The folder the app's data, logs and images live in: the executable's, or on macOS the one
// holding the .app when run from the bundle, so replacing the bundle leaves the data alone. Ends in
// a separator, as path_strip_filename does. Set by the first call, which the logger makes at startup.
app_install_directory :: () -> string {
  if !app_install_directory_path {
    directory := path_strip_filename(get_path_of_running_executable(,, temp));
    #if OS == .MACOS {
      BUNDLE_EXECUTABLE_FOLDER :: "/Contents/MacOS/";
      if ends_with(directory, tprint(".app%", BUNDLE_EXECUTABLE_FOLDER)) {
        directory = path_strip_filename(slice(directory, 0, directory.count - BUNDLE_EXECUTABLE_FOLDER.count));
        app_from_app_bundle = true;
      }
    }
    app_install_directory_path = copy_string(directory,, context.default_allocator);
  }
  return app_install_directory_path;
}

app_running_from_app_bundle :: () -> bool {
  app_install_directory();
  return app_from_app_bundle;
}

// The folder the models' folders (ocr-models, label-models, segment-models) are in: the bundle's
// Contents/Resources on macOS, else beside the executable. Ends in a separator.
app_resource_directory :: () -> string {
  directory := path_strip_filename(get_path_of_running_executable());
  #if OS == .MACOS  if app_running_from_app_bundle()  return tprint("%../Resources/", directory);
  return directory;
}

#scope_file
app_install_directory_path: string;
app_from_app_bundle: bool;
#scope_export

get_app_tray_icon_path :: () -> string {
  push_allocator(temp);
  icon_path := tprint("%1%2", app_install_directory(), APP_TRAY_ICON_PATH);
  log("icon_path: %", icon_path);
  return icon_path;
}

APP_LOG_DIRECTORY :: #run -> string {
  return tprint("logs/%", VERSION);
}
APP_USER_SETTINGS_FILE_NAME :: "settings.config";
APP_USER_SETTINGS_VERSION :: 1;
// A file at any version from this one through APP_USER_SETTINGS_VERSION is readable. Raise
// APP_USER_SETTINGS_VERSION when an action is added to [hotkeys] or [global_hotkeys]; see
// hotkeys_missing_lines.
APP_USER_SETTINGS_OLDEST_READABLE_VERSION :: 1;

APP_SHARED_MEMORY_CHANNEL_HEADER_SIZE :: 2;   // 1 byte for message-or-done, 1 byte for the checksum.
App_Shared_Memory_Tag :: enum u8 {
  Done :: 0;
  Bring_To_Front :: 1;
  Open_File :: 2;   // the path follows the header: show it (open_file_request)
  Show_Help :: 3;   // mcap --help while this one runs: come forward with the Command Line window
}

APP_SHARED_MEMORY_CHANNEL_BYTES :: 4096; // only one page?

APP_WINDOW_TITLE :: #run -> string {
  append_debug := ifx DEBUG then " (DEBUG)\0" else " (RELEASE)\0";
  git_info := ifx GIT_BRANCH != "master" && GIT_BRANCH != "main" then
    tprint(" %-%", GIT_BRANCH, GIT_HASH) else tprint(" %", GIT_HASH);
  return tprint("%1 %2%3%4", APP_NAME, VERSION,
    git_info, append_debug);
}

// The window's title, ending in a 0 for the OS: in view mode, the file's name first.
app_window_title :: () -> string {
  if !app.view_mode  return APP_WINDOW_TITLE;
  return tprint("% - % (view)\0", path_filename(app.open_file), APP_NAME);
}

APP_TRAY_TOOLTIP_TEXT :: #run -> string {
  return ifx DEBUG
      tprint("% % (DEBUG)\0", APP_NAME, VERSION)
    else
      tprint("% %\0", APP_NAME, VERSION);
}

#if OS == .LINUX {
  clipboard_set_text :: (text: string) {
    ImGui.SetClipboardText(temp_c_string(text));
  }
} else {
  clipboard_set_text :: (text: string) {
    os_clipboard_set_text(text);
  }
}