#include <stdlib.h>
#include <sys/cdefs.h>
#include "sdkconfig.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "esp_lcd_panel_interface.h"
#include "esp_lcd_panel_io.h"
#include "hub75.h"
#include "esp_lcd_panel_ops.h"
#include "esp_lcd_panel_commands.h"
#include "driver/gpio.h"
#include "esp_log.h"
#include "esp_check.h"

static const char *TAG = "lcd_panel.hub75";

static esp_err_t panel_hub75_del(esp_lcd_panel_t *panel);
static esp_err_t panel_hub75_reset(esp_lcd_panel_t *panel);
static esp_err_t panel_hub75_init(esp_lcd_panel_t *panel);
static esp_err_t panel_hub75_draw_bitmap(esp_lcd_panel_t *panel, int x_start, int y_start, int x_end, int y_end, const void *color_data);
static esp_err_t panel_hub75_invert_color(esp_lcd_panel_t *panel, bool invert_color_data);
static esp_err_t panel_hub75_mirror(esp_lcd_panel_t *panel, bool mirror_x, bool mirror_y);
static esp_err_t panel_hub75_swap_xy(esp_lcd_panel_t *panel, bool swap_axes);
static esp_err_t panel_hub75_set_gap(esp_lcd_panel_t *panel, int x_gap, int y_gap);
static esp_err_t panel_hub75_disp_on_off(esp_lcd_panel_t *panel, bool off);

typedef struct {
    esp_lcd_panel_t base;
    esp_lcd_panel_io_handle_t io;

    int line_addr_num;          /* 行地址GPIO数量 */
    int line_addr_gpio_num[5];  /* 行地址GPIO */ 
    int lat_gpio_num;           /* 行数据锁存GPIO   下降沿 */
    int oe_gpio_num;            /* 使能显示GPIO     低电平*/
} hub75_panel_t;

esp_err_t esp_lcd_new_panel_hub75(const esp_lcd_panel_io_handle_t io, const hub75_panel_config_t *panel_dev_config, esp_lcd_panel_handle_t *ret_panel)
{
    int i;
    esp_err_t ret = ESP_OK;
    hub75_panel_t *hub75 = NULL;
    ESP_GOTO_ON_FALSE(io && panel_dev_config && ret_panel, ESP_ERR_INVALID_ARG, err, TAG, "invalid argument");
    hub75 = calloc(1, sizeof(hub75_panel_t));
    ESP_GOTO_ON_FALSE(hub75, ESP_ERR_NO_MEM, err, TAG, "no mem for hub75 panel");

    /* gpio初始化 */
    gpio_config_t io_conf = {
        .mode = GPIO_MODE_OUTPUT,
        .pin_bit_mask = (1ULL << panel_dev_config->lat_gpio_num) | (1ULL << panel_dev_config->oe_gpio_num),
    };
    for (i = 0; i < panel_dev_config->line_addr_num; i++)
        io_conf.pin_bit_mask |= (1ULL << panel_dev_config->line_addr_gpio_num[i]);
    ESP_GOTO_ON_ERROR(gpio_config(&io_conf), err, TAG, "configure GPIO for hub75 failed");

    hub75->line_addr_num = panel_dev_config->line_addr_num;
    for (i = 0; i < panel_dev_config->line_addr_num; i++)
        hub75->line_addr_gpio_num[i] = panel_dev_config->line_addr_gpio_num[i];
    hub75->lat_gpio_num = panel_dev_config->lat_gpio_num;
    hub75->oe_gpio_num = panel_dev_config->oe_gpio_num;


    hub75->io = io;
    hub75->base.del = panel_hub75_del;
    hub75->base.reset = panel_hub75_reset;
    hub75->base.init = panel_hub75_init;
    hub75->base.draw_bitmap = panel_hub75_draw_bitmap;

    hub75->base.invert_color = panel_hub75_invert_color;
    hub75->base.set_gap = panel_hub75_set_gap;
    hub75->base.mirror = panel_hub75_mirror;
    hub75->base.swap_xy = panel_hub75_swap_xy;
    hub75->base.disp_on_off = panel_hub75_disp_on_off;
    *ret_panel = &(hub75->base);
    ESP_LOGD(TAG, "new hub75 panel @%p", hub75);

    return ESP_OK;

err:
    if (hub75) {
        panel_hub75_del(&(hub75->base));
    }
    return ret;
}

static esp_err_t panel_hub75_del(esp_lcd_panel_t *panel)
{
    int i;
    hub75_panel_t *hub75 = __containerof(panel, hub75_panel_t, base);
    
    /* 恢复gpio原始状态 */
    for (i = 0; i < hub75->line_addr_num; i++)
        gpio_reset_pin(hub75->line_addr_gpio_num[i]);
    gpio_reset_pin(hub75->lat_gpio_num);
    gpio_reset_pin(hub75->oe_gpio_num);

    ESP_LOGD(TAG, "del hub75 panel @%p", hub75);
    free(hub75);
    return ESP_OK;
}

static esp_err_t panel_hub75_reset(esp_lcd_panel_t *panel)
{
    return ESP_OK;
}

static esp_err_t panel_hub75_init(esp_lcd_panel_t *panel)
{
    return ESP_OK;
}



static esp_err_t panel_hub75_draw_bitmap(esp_lcd_panel_t *panel, int x_start, int y_start, int x_end, int y_end, const void *color_data)
{
    hub75_panel_t *hub75 = __containerof(panel, hub75_panel_t, base);
    assert((x_start < x_end) && (y_start < y_end) && "start position must be smaller than end position");
    esp_lcd_panel_io_handle_t io = hub75->io;
    
    /* 很重要，在这里进行一行数据的组织和发送 */

  //  esp_lcd_panel_io_tx_color(io, LCD_CMD_RAMWR, color_data, len);

    return ESP_OK;
}

static esp_err_t panel_hub75_invert_color(esp_lcd_panel_t *panel, bool invert_color_data)
{
    return ESP_OK;
}

static esp_err_t panel_hub75_mirror(esp_lcd_panel_t *panel, bool mirror_x, bool mirror_y)
{
    return ESP_OK;
}

static esp_err_t panel_hub75_swap_xy(esp_lcd_panel_t *panel, bool swap_axes)
{
    return ESP_OK;
}

static esp_err_t panel_hub75_set_gap(esp_lcd_panel_t *panel, int x_gap, int y_gap)
{
    return ESP_OK;
}

static esp_err_t panel_hub75_disp_on_off(esp_lcd_panel_t *panel, bool on_off)
{
    return ESP_OK;
}