#ifndef V2X_DISPLAY_H
#define V2X_DISPLAY_H

#include <stdint.h>
#include <stdbool.h>
#include "esp_err.h"

/* === Display-Konstanten (T-Dongle-C5) === */
#define DISP_W    80
#define DISP_H    160

/* === GPIO-Pins (T-Dongle-C5) === */
#define DISP_GPIO_CS   10
#define DISP_GPIO_DC    3
#define DISP_GPIO_RST   1
#define DISP_GPIO_BL    0
#define DISP_GPIO_SDA   2
#define DISP_GPIO_SCK   6

/* === Farben (16-bit RGB565) === */
#define DISP_COLOR_BLACK   0x0000
#define DISP_COLOR_WHITE   0xFFFF
#define DISP_COLOR_RED     0xF800
#define DISP_COLOR_GREEN   0x07E0
#define DISP_COLOR_BLUE    0x001F
#define DISP_COLOR_YELLOW  0xFFE0
#define DISP_COLOR_CYAN    0x07FF
#define DISP_COLOR_MAGENTA 0xF81F
#define DISP_COLOR_GRAY    0x7BEF

/* === Font-Optionen === */
#define FONT_6x8   0

/* === Msg-Type Erkennung === */
typedef enum {
    V2X_MSG_UNKNOWN = 0,
    V2X_MSG_BSM     = 1,
    V2X_MSG_CAM     = 2,
    V2X_MSG_DENM    = 3,
} v2x_msg_type_t;

/* === Frame-Info für Scroller === */
typedef struct {
    uint8_t  msg_type;
    int8_t   rssi;
    uint8_t  channel;
    uint8_t  bssid_last3[3];
} disp_frame_info_t;

/* === Frame-Info für SD === */
#define V2X_MAX_FRAME_LEN  512

typedef struct {
    uint64_t   timestamp_us;
    uint8_t    msg_type;
    float      frequency_mhz;
    int8_t     rssi_dbm;
    int8_t     noise_dbm;
    uint8_t    rate_index;
    uint16_t   frame_len;
    uint8_t    mac_addr[6];
    uint8_t    bssid[6];
    uint8_t    raw_data[V2X_MAX_FRAME_LEN];
    uint16_t   raw_len;
    uint8_t    channel;  /* channel field for CSV output */
} v2x_frame_t;

/* === SD-Konstanten === */
#define SD_CARD_MOUNT_POINT   "/sdcard"
#define SD_CSV_FILE           "/sdcard/v2x_frames.csv"
#define SD_LOG_FILE           "/sdcard/v2x_log.txt"
#define CSV_HEADER            "timestamp_us,msg_type,channel,frequency_mhz,rssi_dbm,noise_dbm,rate_index,frame_len,mac_addr,bssid,raw_hex"

/* === Statistik === */
#define RAW_HEX_BUF  512

typedef struct {
    uint64_t   total_frames;
    uint64_t   bsm_count;
    uint64_t   cam_count;
    uint64_t   denm_count;
    uint64_t   unknown_count;
    uint64_t   sd_write_errors;
    uint64_t   start_timestamp_us;
} v2x_stats_t;

/* === Globale Display-Status-Variablen === */
extern bool g_disp_initialized;
extern void *g_disp_panel;

/* === Globale V2X-Status-Variablen (für UI) === */
extern uint32_t g_v2x_frame_count;
extern int8_t   g_v2x_max_rssi;
extern uint32_t g_v2x_current_freq;
extern int      g_v2x_channel_idx;

/* === Display-Primärfunktionen === */
esp_err_t v2x_display_init(void);
esp_err_t v2x_display_clear(uint16_t color);
esp_err_t v2x_display_rect(int16_t x, int16_t y, int16_t w, int16_t h, uint16_t color, bool filled);
esp_err_t v2x_display_line(int16_t x0, int16_t y0, int16_t x1, int16_t y1, uint16_t color);
esp_err_t v2x_display_off(void);

/* === Display-Zeichnungsfunktionen === */
esp_err_t v2x_display_text(int16_t x, int16_t y, const char *text, uint16_t color, uint8_t font);
esp_err_t v2x_display_frame_count(uint32_t count);
esp_err_t v2x_display_storage_bar(int16_t x, int16_t y, int16_t w, int16_t h, float pct);
esp_err_t v2x_display_progress_bar(int16_t x, int16_t y, int16_t w, int16_t h, float progress,
                                    uint16_t fg_color, uint16_t bg_color);
esp_err_t v2x_display_rssi_gauge(int8_t rssi);
esp_err_t v2x_display_render_frame_line(int16_t x, int16_t y, const disp_frame_info_t *info,
                                        uint16_t bg_color);

/* === Scroller-Funktionen === */
void scroller_add_entry(uint8_t msg_type, int8_t rssi, uint8_t ch, const uint8_t *bssid);
void scroller_redraw(void);
void scroller_redraw_line(uint32_t entry_idx);

/* === SD-Funktionen === */
esp_err_t v2x_sd_init(void);
esp_err_t v2x_sd_write_frame(const v2x_frame_t *frame);
esp_err_t v2x_sd_dump_stats(void);
esp_err_t v2x_sd_reset_stats(void);
esp_err_t v2x_sd_log_write(const char *fmt, ...);
const v2x_stats_t* v2x_sd_get_stats(void);
void frame_to_csv_line(const v2x_frame_t *frame, char *out, size_t out_len);

/* === Display UI Task === */
void v2x_display_ui_task(void *pvParameters);

#endif /* V2X_DISPLAY_H */