// SPDX-License-Identifier: Apache-2.0
#include <lvgl.h>
#include <tactility/lvgl_fonts.h>
#include <tactility/check.h>

// The preprocessor definitions that are used below are defined in the CMakeLists.txt from this module.
extern const lv_font_t TT_LVGL_TEXT_FONT_SMALL_SYMBOL;
extern const lv_font_t TT_LVGL_TEXT_FONT_DEFAULT_SYMBOL;
extern const lv_font_t TT_LVGL_TEXT_FONT_LARGE_SYMBOL;

extern const lv_font_t TT_LVGL_LAUNCHER_FONT_ICON_SYMBOL;
extern const lv_font_t TT_LVGL_STATUSBAR_FONT_ICON_SYMBOL;
extern const lv_font_t TT_LVGL_SHARED_FONT_ICON_SYMBOL;

// All compiled-in Montserrat fonts for runtime switching (extern from lvgl lib)
#ifdef CONFIG_LV_FONT_MONTSERRAT_14
extern const lv_font_t lv_font_montserrat_14;
#endif
#ifdef CONFIG_LV_FONT_MONTSERRAT_16
extern const lv_font_t lv_font_montserrat_16;
#endif
#ifdef CONFIG_LV_FONT_MONTSERRAT_18
extern const lv_font_t lv_font_montserrat_18;
#endif
#ifdef CONFIG_LV_FONT_MONTSERRAT_20
extern const lv_font_t lv_font_montserrat_20;
#endif
#ifdef CONFIG_LV_FONT_MONTSERRAT_24
extern const lv_font_t lv_font_montserrat_24;
#endif
#ifdef CONFIG_LV_FONT_MONTSERRAT_26
extern const lv_font_t lv_font_montserrat_26;
#endif
#ifdef CONFIG_LV_FONT_MONTSERRAT_28
extern const lv_font_t lv_font_montserrat_28;
#endif
#ifdef CONFIG_LV_FONT_MONTSERRAT_30
extern const lv_font_t lv_font_montserrat_30;
#endif

// Runtime font size override - 0 = use compile-time default, otherwise explicit point size
static uint8_t g_runtime_font_size = 0;

void lvgl_set_runtime_font_size(uint8_t font_size) {
    g_runtime_font_size = font_size;
}

uint8_t lvgl_get_runtime_font_size() {
    return g_runtime_font_size;
}

static const lv_font_t* get_font_for_size(uint8_t size) {
    // Map requested size to closest available compiled font
    if (size == 0) return NULL; // use compile-time
#ifdef CONFIG_LV_FONT_MONTSERRAT_14
    if (size <= 14) return &lv_font_montserrat_14;
#endif
#ifdef CONFIG_LV_FONT_MONTSERRAT_16
    if (size <= 16) return &lv_font_montserrat_16;
#endif
#ifdef CONFIG_LV_FONT_MONTSERRAT_18
    if (size <= 18) return &lv_font_montserrat_18;
#endif
#ifdef CONFIG_LV_FONT_MONTSERRAT_20
    if (size <= 20) return &lv_font_montserrat_20;
#endif
#ifdef CONFIG_LV_FONT_MONTSERRAT_24
    if (size <= 24) return &lv_font_montserrat_24;
#endif
#ifdef CONFIG_LV_FONT_MONTSERRAT_26
    if (size <= 26) return &lv_font_montserrat_26;
#endif
#ifdef CONFIG_LV_FONT_MONTSERRAT_28
    if (size <= 28) return &lv_font_montserrat_28;
#endif
#ifdef CONFIG_LV_FONT_MONTSERRAT_30
    return &lv_font_montserrat_30;
#else
    return NULL;
#endif
}

uint32_t lvgl_get_text_font_height(enum LvglFontSize font_size) {
    if (g_runtime_font_size != 0) {
        // Scale heights: small = runtime-4, default = runtime, large = runtime+6
        switch (font_size) {
            case FONT_SIZE_SMALL: return g_runtime_font_size > 4 ? g_runtime_font_size - 4 : g_runtime_font_size;
            case FONT_SIZE_DEFAULT: return g_runtime_font_size;
            case FONT_SIZE_LARGE: return g_runtime_font_size + 6;
            default: check(false);
        }
    }
    switch (font_size) {
        case FONT_SIZE_SMALL: return TT_LVGL_TEXT_FONT_SMALL_SIZE;
        case FONT_SIZE_DEFAULT: return TT_LVGL_TEXT_FONT_DEFAULT_SIZE;
        case FONT_SIZE_LARGE: return TT_LVGL_TEXT_FONT_LARGE_SIZE;
        default: check(false);
    }
}

const lv_font_t* lvgl_get_text_font(enum LvglFontSize font_size) {
    if (g_runtime_font_size != 0) {
        uint8_t target_size;
        switch (font_size) {
            case FONT_SIZE_SMALL: target_size = g_runtime_font_size > 4 ? g_runtime_font_size - 4 : g_runtime_font_size; break;
            case FONT_SIZE_DEFAULT: target_size = g_runtime_font_size; break;
            case FONT_SIZE_LARGE: target_size = g_runtime_font_size + 6; break;
            default: check(false); return &TT_LVGL_TEXT_FONT_DEFAULT_SYMBOL;
        }
        const lv_font_t* f = get_font_for_size(target_size);
        if (f != NULL) return f;
    }
    switch (font_size) {
        case FONT_SIZE_SMALL: return &TT_LVGL_TEXT_FONT_SMALL_SYMBOL;
        case FONT_SIZE_DEFAULT: return &TT_LVGL_TEXT_FONT_DEFAULT_SYMBOL;
        case FONT_SIZE_LARGE: return &TT_LVGL_TEXT_FONT_LARGE_SYMBOL;
        default: check(false); return &TT_LVGL_TEXT_FONT_DEFAULT_SYMBOL;
    }
}

uint32_t lvgl_get_shared_icon_font_height() { return TT_LVGL_SHARED_FONT_ICON_SIZE; }
const lv_font_t* lvgl_get_shared_icon_font() { return &TT_LVGL_SHARED_FONT_ICON_SYMBOL; }
uint32_t lvgl_get_launcher_icon_font_height() { return TT_LVGL_LAUNCHER_FONT_ICON_SIZE; }
const lv_font_t* lvgl_get_launcher_icon_font() { return &TT_LVGL_LAUNCHER_FONT_ICON_SYMBOL; }
uint32_t lvgl_get_statusbar_icon_font_height() { return TT_LVGL_STATUSBAR_FONT_ICON_SIZE; }
const lv_font_t* lvgl_get_statusbar_icon_font() { return &TT_LVGL_STATUSBAR_FONT_ICON_SYMBOL; }