//
// Created by rov on 12/27/25.
//

#include "gui.h"

#include <float.h>
#include "dcimgui.h"
#include "dcimgui_impl_sdl3.h"
#include "dcimgui_impl_sdlrenderer3.h"

#include "window.h"
#include "config.h"

void Gui_Init(Gui_t *gui) {
    ImGui_CreateContext(NULL);

    ImGuiIO *io = ImGui_GetIO();
    io->ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;

    ImGui_StyleColorsLight(NULL);

    SDL_Window *window = Window_GetWindow();
    SDL_Renderer *renderer = Window_GetRenderer();

    cImGui_ImplSDL3_InitForSDLRenderer(window, renderer);
    cImGui_ImplSDLRenderer3_Init(renderer);

    gui->isPreferencesDialogOpen = false;
    gui->statusBarText = "Welcome to Tibia!";
}

void Gui_ProcessEvent(const SDL_Event *event) {
    cImGui_ImplSDL3_ProcessEvent(event);
}

void Gui_StartRender() {
    cImGui_ImplSDLRenderer3_NewFrame();
    cImGui_ImplSDL3_NewFrame();
    ImGui_NewFrame();
}

void Gui_Render(Gui_t *gui, ConfigParams_t *configParams) {
    Gui_RenderMainMenu(gui);
    Gui_RenderStatusBar(gui);
    Gui_RenderPreferences_Dialog(gui, configParams);
}

void Gui_FinishRender() {
    SDL_Renderer *renderer = Window_GetRenderer();

    ImGui_Render();
    cImGui_ImplSDLRenderer3_RenderDrawData(ImGui_GetDrawData(), renderer);
}

void Gui_Shutdown() {
    cImGui_ImplSDLRenderer3_Shutdown();
    cImGui_ImplSDL3_Shutdown();
    ImGui_DestroyContext(NULL);
}

void Gui_RenderMainMenu(Gui_t *gui) {
    if (!ImGui_BeginMainMenuBar()) {
        return;
    }

    if (ImGui_BeginMenu("File")) {
        if (ImGui_MenuItem("Preferences")) {
            gui->isPreferencesDialogOpen = true;
        }

        ImGui_Separator();

        if (ImGui_MenuItem("Bye Bye")) {
        }

        ImGui_EndMenu();
    }

    if (ImGui_BeginMenu("Game")) {
        if (ImGui_MenuItem("New Game")) {
        }

        if (ImGui_MenuItem("Journey Onward")) {
        }

        if (ImGui_MenuItem("End Game")) {
        }

        ImGui_EndMenu();
    }

    if (ImGui_BeginMenu("Info")) {
        if (ImGui_MenuItem("Change Data")) {
        }

        if (ImGui_MenuItem("Userlist")) {
        }

        if (ImGui_MenuItem("Comments")) {
        }

        ImGui_EndMenu();
    }

    const char *label = "Help";

    // 1. Calculate text size
    const float textWidth = ImGui_CalcTextSize(label).x;

    // 2. Add the internal padding ImGui adds to menus (Style.FramePadding.x * 2)
    const float menuWidth = textWidth + ImGui_GetStyle()->FramePadding.x * 2.0f + 2;

    // 3. Set Cursor (Window Width - Menu Width)
    ImGui_SetCursorPosX(ImGui_GetWindowWidth() - menuWidth);

    // 4. Draw the menu
    if (ImGui_BeginMenu(label)) {
        if (ImGui_MenuItem("Version")) {
        }
        ImGui_EndMenu();
    }

    ImGui_EndMainMenuBar();
}

void Gui_RenderStatusBar(const Gui_t* gui) {
    const ImGuiViewport *viewport = ImGui_GetMainViewport();

    const float height = ImGui_GetFrameHeight();
    const ImVec2 position = {viewport->Pos.x, viewport->Pos.y + viewport->Size.y - height};
    const ImVec2 size = {viewport->Size.x, height};

    ImGui_SetNextWindowPosEx(position, ImGuiCond_Always, (ImVec2){0.0f, 0.0f});
    ImGui_SetNextWindowSize(size, ImGuiCond_Always);

    // Remove rounding, borders and reduce padding
    ImGui_PushStyleVar(ImGuiStyleVar_WindowRounding, 0.0f);
    ImGui_PushStyleVar(ImGuiStyleVar_WindowBorderSize, 0.0f);
    ImGui_PushStyleVarImVec2(ImGuiStyleVar_WindowPadding, (ImVec2){8.0f, 2.0f});

    // Set background and text colors
    ImGui_PushStyleColorImVec4(ImGuiCol_WindowBg, (ImVec4){0.85f, 0.85f, 0.85f, 1.0f});
    ImGui_PushStyleColorImVec4(ImGuiCol_Text, (ImVec4){0.0f, 0.0f, 0.0f, 1.0f});

    const ImGuiWindowFlags windowFlags = ImGuiWindowFlags_NoDecoration | ImGuiWindowFlags_NoMove |
                                         ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoSavedSettings |
                                         ImGuiWindowFlags_NoBringToFrontOnFocus | ImGuiWindowFlags_NoNav;

    if (ImGui_Begin("StatusBar", NULL, windowFlags)) {
        ImGui_Text(gui->statusBarText);
    }

    ImGui_End();

    ImGui_PopStyleColorEx(2);
    ImGui_PopStyleVarEx(3);
}

void Gui_RenderPreferences_Dialog(Gui_t *gui, ConfigParams_t *configParams) {
    if (!gui->isPreferencesDialogOpen) {
        return;
    }

    // Set the dialog position to the center of the screen, and let it grow as necessary
    const ImGuiViewport *viewport = ImGui_GetMainViewport();
    const ImVec2 viewportCenter = {
        viewport->Pos.x + viewport->Size.x * 0.5f, viewport->Pos.y + viewport->Size.y * 0.5f
    };
    ImGui_SetNextWindowPosEx(viewportCenter, ImGuiCond_Appearing, (ImVec2){0.5f, 0.5f});
    ImGui_SetNextWindowSize((ImVec2){450, 0}, ImGuiCond_Always);

    if (!ImGui_Begin("Preferences", &gui->isPreferencesDialogOpen,
                     ImGuiWindowFlags_NoResize | ImGuiWindowFlags_NoCollapse)) {
        ImGui_End();
        SDL_LogError(SDL_LOG_CATEGORY_CUSTOM, "Gui_RenderPreferences_Dialog: couldn't render.");
    }

    ImGui_Text("Server Data:");

    if (ImGui_BeginTable("ServerTable", 2, ImGuiTableFlags_SizingFixedFit)) {
        ImGui_TableSetupColumnEx("Label", ImGuiTableColumnFlags_WidthFixed, 180.0f, 0);
        ImGui_TableSetupColumn("Input", ImGuiTableColumnFlags_WidthStretch);

        // Server Address
        ImGui_TableNextRow();
        ImGui_TableSetColumnIndex(0);
        ImGui_AlignTextToFramePadding();
        ImGui_Text("Tibia-Server Address:");
        ImGui_TableSetColumnIndex(1);
        ImGui_SetNextItemWidth(-FLT_MIN);
        ImGui_InputText("##Address", configParams->serverAddress, IM_ARRAYSIZE(configParams->serverAddress), 0);

        // Server Address
        ImGui_TableNextRow();
        ImGui_TableSetColumnIndex(0);
        ImGui_AlignTextToFramePadding();
        ImGui_Text("Tibia-Server Portnumber:");
        ImGui_TableSetColumnIndex(1);
        ImGui_SetNextItemWidth(-FLT_MIN);
        ImGui_InputScalar("##Port", ImGuiDataType_U16, &configParams->serverPort);

        ImGui_EndTable();
    }

    ImGui_Spacing();
    ImGui_Separator();
    ImGui_Spacing();

    if (ImGui_BeginTable("BottomSplit", 2, ImGuiTableFlags_BordersInnerV)) {
        ImGui_TableSetupColumn("PlayerData", ImGuiTableColumnFlags_WidthStretch);
        ImGui_TableSetupColumnEx("Actions", ImGuiTableColumnFlags_WidthFixed, 100.0f, 0);

        ImGui_TableNextRow();

        // Player Data
        ImGui_TableSetColumnIndex(0);
        ImGui_Text("Player Data:");

        if (ImGui_BeginTable("PlayerDataTable", 2, ImGuiTableFlags_SizingFixedFit)) {
            ImGui_TableSetupColumnEx("Label", ImGuiTableColumnFlags_WidthFixed, 120.0f, 0);
            ImGui_TableSetupColumn("Input", ImGuiTableColumnFlags_WidthStretch);

            // Player Name
            ImGui_TableNextRow();
            ImGui_TableSetColumnIndex(0);
            ImGui_AlignTextToFramePadding();
            ImGui_Text("Player Name:");

            ImGui_TableSetColumnIndex(1);
            ImGui_SetNextItemWidth(-FLT_MIN);
            ImGui_InputText("##PName", configParams->lastAccount, IM_ARRAYSIZE(configParams->lastAccount), 0);

            // Player Password
            ImGui_TableNextRow();
            ImGui_TableSetColumnIndex(0);
            ImGui_AlignTextToFramePadding();
            ImGui_Text("Player Password:");

            ImGui_TableSetColumnIndex(1);
            ImGui_SetNextItemWidth(-FLT_MIN);
            ImGui_InputText("##PPass", configParams->lastPassword, IM_ARRAYSIZE(configParams->lastPassword),
                            ImGuiInputTextFlags_Password);

            ImGui_EndTable();
        }

        // Buttons
        ImGui_TableSetColumnIndex(1);

        ImGui_Dummy((ImVec2){0.0f, 2.25f});

        if (ImGui_ButtonEx("Cancel", (ImVec2){-FLT_MIN, 0})) {
            gui->isPreferencesDialogOpen = false;
        }

        ImGui_Dummy((ImVec2){0.0f, 10.0f});

        if (ImGui_ButtonEx("Save", (ImVec2){-FLT_MIN, 0})) {
            Config_Save_Settings(configParams);
            gui->isPreferencesDialogOpen = false;
        }

        ImGui_EndTable();
    }

    ImGui_End();
}