WindowID BuildWindowID;
ViewID BuildViewID;
BufferID BuildBufferID;

void InitBuildWindow() {
    Window *window = CreateWind();
    BuildWindowID = window->id;
    Buffer *buffer = CreateBuffer(SysAllocator, GetUniqueBufferName(ProjectFolder, "build"));
    buffer->special = true;
    buffer->no_history = true;
    BuildBufferID = buffer->id;
    View *view = CreateView(buffer->id);
    view->special = true;
    BuildViewID = view->id;
    window->active_view = view->id;
    window->secondary_window_style = true;
    window->draw_line_highlight = true;
    window->primary = false;
    window->visible = false;
    window->lose_visibility_on_escape = true;
    window->jump_history = false;
}

void LayoutBuildWindow(Rect2I *rect, int16_t wx, int16_t wy) {
    Unused(wx); Unused(wy);
    Window *window = GetWindow(BuildWindowID);
    Rect2I copy_rect = *rect;
    if (!window->visible) {
        rect = &copy_rect;
    }
    Int barsize = window->font->line_spacing * 10;
    window->document_rect = window->total_rect = CutBottom(rect, barsize);
}

BSet ExecBuild(String windows_cmd, String unix_cmd, String working_dir = ProjectFolder) {
    SaveAll();
    Scratch scratch;
    BSet build = GetBSet(BuildWindowID);
    BSet main = GetBSet(PrimaryWindowID);
    SelectRange(build.view, Range{});
    ResetBuffer(build.buffer);
    {
        ExecArgs args = ShellArgs(scratch, build.view->id, OS_WINDOWS ? windows_cmd : unix_cmd, working_dir);
        args.scroll_to_end = true;
        Exec(args);
    }
    main.window->active_goto_list = build.view->id;
    main.window->goto_list_pos = -1;
    build.window->visible = true;
    return build;
}

void CMD_Build1() {
    ExecBuild(Build1OnWindows, Build1OnUnix);
} RegisterCommand(CMD_Build1, "ctrl-b", "Run Build1OnWindows or OnUnix in working directory, output is printed in a popup console and a special build buffer");

void CMD_Build2() {
    ExecBuild(Build2OnWindows, Build2OnUnix);
} RegisterCommand(CMD_Build2, "alt-b", "Run Build2OnWindows or OnUnix in working directory, output is printed in a popup console and a special build buffer");

void CMD_Build3() {
    ExecBuild(Build3OnWindows, Build3OnUnix);
} RegisterCommand(CMD_Build3, "shift-b", "Run Build3OnWindows or OnUnix in working directory, output is printed in a popup console and a special build buffer");

void CMD_Build4() {
    ExecBuild(Build4OnWindows, Build4OnUnix);
} RegisterCommand(CMD_Build4, "ctrl-alt-b", "Run Build4OnWindows or OnUnix in working directory, output is printed in a popup console and a special build buffer");

void CMD_RunFile() {
    Scratch scratch;
    BSet primary = GetBSet(PrimaryWindowID);
    // @todo: this calls for language_cpp, language_c, language_python etc.
    String windows_command = "";
    String unix_command = "";
    if (EndsWith(primary.buffer->name, ".py")) {
        unix_command = windows_command = Format(scratch, "python %S", primary.buffer->name);
    } else {
        windows_command = Format(scratch, "cl %S -Fe:cfile.exe /Zi /FC /nologo /WX /W3 /wd4200 /wd4334 /diagnostics:column && cfile.exe && del cfile.*", primary.buffer->name);
        unix_command = Format(scratch, "bash <<EOF\nclang %S -o cfile.exe -g -Wall -Wno-missing-braces -Wno-writable-strings -Wno-writable-strings -fsanitize=address -fdiagnostics-absolute-paths -lm \n./cfile.exe \nrm cfile.exe\nEOF", primary.buffer->name);
    }
    ExecBuild(windows_command, unix_command, GetDirectory(primary.buffer));
} RegisterCommand(CMD_RunFile, "", "Run and build current file, currently only C/C++ supported");

void CMD_ShowBuildWindow() {
    BSet main = GetBSet(BuildWindowID);
    if (ActiveWindowID != BuildWindowID) {
        main.window->visible = true;
        NextActiveWindowID = BuildWindowID;
    } else {
        main.window->visible = false;
    }
} RegisterCommand(CMD_ShowBuildWindow, "ctrl-grave", "Toggles visibility of the build window");