#include <stm32h747xx.h>
#include <stdint.h>
#include <stdbool.h>

#ifndef DISPLAY_H
#define DISPLAY_H

typedef enum {
  DSI_VIDEO_NON_BURST_PULSES = 0,
  DSI_VIDEO_NON_BURST_EVENTS = 1,
  DSI_VIDEO_BURST = 2,
} dsi_video_mode_t;

typedef struct {
  uint16_t active_width;
  uint16_t active_height;
  uint16_t h_back_porch;
  uint16_t h_front_porch;
  uint16_t v_back_porch;
  uint16_t v_front_porch;

  // ?
  /* uint16_t h_sync_lane_byte_cycles; */

  uint16_t h_sync;
  uint16_t v_sync;
  bool h_sync_pol;
  bool v_sync_pol;
  bool not_data_enable_pol;
  bool pixel_clock_pol;

  dsi_video_mode_t video_mode;

  uint8_t channel;
} display_config_t;

typedef enum {
  CODING_16_BIT_1 = 0,
  CODING_16_BIT_2 = 1,
  CODING_16_BIT_3 = 2,
  CODING_18_BIT_1 = 3,
  CODING_18_BIT_2 = 4,
  CODING_24_BIT = 5,
} dsi_color_coding_t;

typedef enum {
  LTDC_ARGB8888 = 0,
  LTDC_RGB888 = 1,
  LTDC_RGB565 = 2,
  LTDC_ARGB1555 = 3,
  LTDC_ARGB4444 = 4,
  LTDC_L8 = 5,
  LTDC_AL44 = 6,
  LTDC_AL88 = 7,
} ltdc_layer_pixel_format_t;

typedef struct {
  uint8_t channel;
  bool color_loosely_packed;
  dsi_color_coding_t color_coding;
  dsi_color_coding_t wrapper_color_coding;
  uint8_t lp_size;
  uint8_t vlp_size;
} dsi_config_t;

typedef enum {
  DSI_MODE_ADAPTED_COMMAND,
  DSI_MODE_VIDEO,
} dsi_mode_t;

typedef struct {
  uint8_t divn;
  uint8_t idf;
  uint8_t odf;
  uint8_t eckdiv;
} dsi_pll_config_t;

typedef struct {
  bool crc_reception_enable;
  bool ecc_reception_enable;
  bool bta_enable;
  bool eotp_reception_enable;
  bool eotp_transmission_enable;
} dsi_flow_config_t;

typedef struct {
  uint8_t data_lanes;
  bool auto_clock_lane_control;
  uint8_t clock_control;

  uint8_t clock_hs2lp;
  uint8_t clock_lp2hs;

  uint8_t data_hs2lp;
  uint8_t data_lp2hs;
  uint8_t max_read_time;

  uint8_t stop_wait_time;

  uint8_t unit_interval;
} dsi_phy_config_t;


typedef struct {
  DSI_TypeDef* dsi;
  LTDC_TypeDef* ltdc;
  LTDC_Layer_TypeDef* layer;
  display_config_t config;
} display_t;

void display_init(display_t *display, DSI_TypeDef *dsi, LTDC_TypeDef* ltdc, LTDC_Layer_TypeDef* layer, display_config_t display_config);
void display_start(display_t* display);

void display_setup(display_t *display, uint32_t dsi_khz, uint32_t ltdc_khz,
                   dsi_mode_t mode,
                   dsi_pll_config_t pll, dsi_phy_config_t phy,
                   dsi_flow_config_t flow, dsi_config_t dsi_config);

void display_command_mode(display_t* display);
void display_video_mode(display_t* display);

void display_dsi_short_write(display_t* display, uint8_t lsb, uint8_t msb, uint8_t discriminant);
void display_dsi_long_write(display_t* display, uint8_t cmd, uint8_t* data, uint16_t len, uint8_t discriminant);
void display_dsi_read(display_t* display, uint8_t* buffer);

void display_set_command_mode_transmission_kind(display_t* display, bool low_power);

// Layer calls
void display_layer_setup(display_t *display, void* buffer, ltdc_layer_pixel_format_t pixel_format);
void display_set_framebuffer(display_t* display, void* buffer);
void display_refresh(display_t* display);
void display_reload(display_t *display);

#endif // DISPLAY_H