/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file    screen.c
  * @brief   串口屏驱动实现（JC系列），使用 USART1
  ******************************************************************************
  */
/* USER CODE END Header */

#include "screen.h"
#include "cmsis_os2.h"
#include "main.h"
#include "usart.h"
#include "cmsis_os.h"
#include <string.h>
#include <stdint.h>
#include "gbk_text.h"
#include "elog.h"

/* 发送缓冲 */
static uint8_t txbuf[512];

/* =========================================================
   内部工具函数（替代 sprintf）
   ========================================================= */

/* 将字符串复制到发送缓冲区 */
static uint16_t buf_str(uint16_t p,const char *s)
{
    while(*s) txbuf[p++]=*s++;
    return p;
}

/* 将32位无符号整数转换为字符串并复制到发送缓冲区 */
static uint16_t buf_u32(uint16_t p,uint32_t v)
{
    char tmp[12];
    int i=0;
    if(v==0){ txbuf[p++]='0'; return p; }
    while(v){ tmp[i++]=v%10+'0'; v/=10; }
    while(i--) txbuf[p++]=tmp[i];
    return p;
}

/* 发送指定长度的数据 */
static void send_buf(uint16_t len)
{
    HAL_UART_Transmit(&huart1,txbuf,len,HAL_MAX_DELAY);
    osDelay(100);
}

/* =========================================================
   基础接口
   ========================================================= */

/* 发送数据缓冲区 */
int Screen_SendBuf(const uint8_t *buf,uint16_t len)
{
    if(!buf||!len) return -1;
    HAL_StatusTypeDef st=HAL_UART_Transmit(&huart1,(uint8_t*)buf,len,HAL_MAX_DELAY);
    osDelay(20);
    return (st==HAL_OK)?0:-2;
}

/* 发送命令字符串 */
int Screen_SendCmd(const char *cmd)
{
    if(!cmd) return -1;
    return Screen_SendBuf((uint8_t*)cmd,strlen(cmd));
}

/* 发送命令并等待确认（当前未实现超时机制） */
int Screen_SendCmdWaitOK(const char *cmd,uint32_t timeout_ms)
{
    (void)timeout_ms;
    return Screen_SendCmd(cmd);
}

/* =========================================================
   初始化
   ========================================================= */

/* 屏幕初始化函数 */
void Screen_Init(void)
{
    osDelay(1000);
    Screen_Clear(BG_COLOR);
    osDelay(200);
    Screen_SetBGColor(BG_COLOR);
    Screen_SetBrightness(0);
    osDelay(200);
    Screen_Box(0,0,127,127,TEXT_COLOR);
    Screen_DrawText24_GBK(5,1,text_device_name,text_device_name_LEN,TEXT_COLOR); 
    Screen_Line(0, 27, 127, 27, TEXT_COLOR);
}

/* =========================================================
   基础命令（全部保留）
   ========================================================= */

/* 清除指定图层 */
void Screen_Clear(uint8_t layer)
{
    uint16_t p=0;
    p=buf_str(p,"DIR(1);CLR(");
    p=buf_u32(p,layer);
    p=buf_str(p,");\r\n");
    send_buf(p);
}

/* 显示指定地址的图片 */
void Screen_DisplayImage(uint32_t addr)
{
    uint16_t p=0;
    p=buf_str(p,"DIR(1);FSIMG(");
    p=buf_u32(p,addr);
    p=buf_str(p,",0,0,128,128,0);\r\n");
    send_buf(p);
}

/* 设置屏幕亮度 */
void Screen_SetBrightness(uint8_t val)
{
    uint16_t p=0;
    p=buf_str(p,"BL(");
    p=buf_u32(p,val);
    p=buf_str(p,");\r\n");
    send_buf(p);
}

/* 设置屏幕旋转方向 */
void Screen_SetRotation(uint8_t dir)
{
    uint16_t p=0;
    p=buf_str(p,"DIR(");
    p=buf_u32(p,dir);
    p=buf_str(p,");\r\n");
    send_buf(p);
}

/* 设置串口波特率 */
void Screen_SetBaud(uint32_t baud)
{
    uint16_t p=0;
    p=buf_str(p,"BPS(");
    p=buf_u32(p,baud);
    p=buf_str(p,");\r\n");
    send_buf(p);
}

/* 在指定位置显示图片 */
void Screen_DisplayImageAtAddr(uint32_t addr,uint16_t x,uint16_t y,uint16_t w,uint16_t h,uint8_t mode)
{
    uint16_t p=0;
    p=buf_str(p,"FSIMG(");
    p=buf_u32(p,addr); txbuf[p++]=',';
    p=buf_u32(p,x); txbuf[p++]=',';
    p=buf_u32(p,y); txbuf[p++]=',';
    p=buf_u32(p,w); txbuf[p++]=',';
    p=buf_u32(p,h); txbuf[p++]=',';
    p=buf_u32(p,mode);
    p=buf_str(p,");\r\n");
    send_buf(p);
}

/* 通过索引显示图片 */
void Screen_DisplayImageByIndex(uint32_t index,uint16_t x,uint16_t y,uint16_t w,uint16_t h,uint8_t mode)
{
    Screen_DisplayImageAtAddr(index,x,y,w,h,mode);
}

/* 绘制单个像素点 */
void Screen_Pixel(uint16_t x,uint16_t y,uint8_t color)
{
    uint16_t p=0;
    p=buf_str(p,"PS(");
    p=buf_u32(p,x); txbuf[p++]=',';
    p=buf_u32(p,y); txbuf[p++]=',';
    p=buf_u32(p,color);
    p=buf_str(p,");\r\n");
    send_buf(p);
}

/* 绘制直线 */
void Screen_Line(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t y2,uint8_t color)
{
    uint16_t p=0;
    p=buf_str(p,"PL(");
    p=buf_u32(p,x1); txbuf[p++]=',';
    p=buf_u32(p,y1); txbuf[p++]=',';
    p=buf_u32(p,x2); txbuf[p++]=',';
    p=buf_u32(p,y2); txbuf[p++]=',';
    p=buf_u32(p,color);
    p=buf_str(p,");\r\n");
    send_buf(p);
}

/* 绘制矩形框 */
void Screen_Box(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t y2,uint8_t color)
{
    uint16_t p=0;
    p=buf_str(p,"BOX(");
    p=buf_u32(p,x1); txbuf[p++]=',';
    p=buf_u32(p,y1); txbuf[p++]=',';
    p=buf_u32(p,x2); txbuf[p++]=',';
    p=buf_u32(p,y2); txbuf[p++]=',';
    p=buf_u32(p,color);
    p=buf_str(p,");\r\n");
    send_buf(p);
}

/* 绘制填充矩形 */
void Screen_BoxFill(uint16_t x1,uint16_t y1,uint16_t x2,uint16_t y2,uint8_t color)
{
    uint16_t p=0;
    p=buf_str(p,"BOXF(");
    p=buf_u32(p,x1); txbuf[p++]=',';
    p=buf_u32(p,y1); txbuf[p++]=',';
    p=buf_u32(p,x2); txbuf[p++]=',';
    p=buf_u32(p,y2); txbuf[p++]=',';
    p=buf_u32(p,color);
    p=buf_str(p,");\r\n");
    send_buf(p);
}

/* 绘制圆形 */
void Screen_Circle(uint16_t x,uint16_t y,uint16_t r,uint8_t color)
{
    uint16_t p=0;
    p=buf_str(p,"CIR(");
    p=buf_u32(p,x); txbuf[p++]=',';
    p=buf_u32(p,y); txbuf[p++]=',';
    p=buf_u32(p,r); txbuf[p++]=',';
    p=buf_u32(p,color);
    p=buf_str(p,");\r\n");
    send_buf(p);
}

/* 绘制填充圆形 */
void Screen_CircleFill(uint16_t x,uint16_t y,uint16_t r,uint8_t color)
{
    uint16_t p=0;
    p=buf_str(p,"CIRF(");
    p=buf_u32(p,x); txbuf[p++]=',';
    p=buf_u32(p,y); txbuf[p++]=',';
    p=buf_u32(p,r); txbuf[p++]=',';
    p=buf_u32(p,color);
    p=buf_str(p,");\r\n");
    send_buf(p);
}

/* 设置背景颜色 */
void Screen_SetBGColor(uint8_t color)
{
    uint16_t p=0;
    p=buf_str(p,"SBC(");
    p=buf_u32(p,color);
    p=buf_str(p,");\r\n");
    send_buf(p);
}

/* =========================================================
   GBK核心（所有字号）
   ========================================================= */

/* 绘制GBK文本的核心函数 */
static void draw_gbk(const char *cmd,
                     uint16_t x,uint16_t y,
                     const uint8_t *gbk,uint16_t len,
                     uint8_t color,
                     uint8_t extra,
                     uint8_t has_extra)
{
    uint16_t p=0;

    p=buf_str(p,cmd);
    txbuf[p++]='(';
    p=buf_u32(p,x); txbuf[p++]=',';
    p=buf_u32(p,y); txbuf[p++]=',';
    txbuf[p++]='\'';

    memcpy(&txbuf[p],gbk,len);
    p+=len;

    txbuf[p++]='\'';
    txbuf[p++]=',';
    p=buf_u32(p,color);

    if(has_extra){
        txbuf[p++]=',';
        p=buf_u32(p,extra);
    }

    p=buf_str(p,");\r\n");
    send_buf(p);
}

/* 16号字体GBK文本绘制 */
void Screen_DrawText16_GBK(uint16_t x,uint16_t y,const uint8_t *g,uint16_t l,uint8_t c){draw_gbk("DC16",x,y,g,l,c,0,0);}
void Screen_DrawText16V_GBK(uint16_t x,uint16_t y,const uint8_t *g,uint16_t l,uint8_t c){draw_gbk("DCV16",x,y,g,l,c,0,0);}

/* 24号字体GBK文本绘制 */
void Screen_DrawText24_GBK(uint16_t x,uint16_t y,const uint8_t *g,uint16_t l,uint8_t c){draw_gbk("DC24",x,y,g,l,c,0,0);}
void Screen_DrawText24V_GBK(uint16_t x,uint16_t y,const uint8_t *g,uint16_t l,uint8_t c){draw_gbk("DCV24",x,y,g,l,c,0,0);}

/* 32号字体GBK文本绘制 */
void Screen_DrawText32_GBK(uint16_t x,uint16_t y,const uint8_t *g,uint16_t l,uint8_t c){draw_gbk("DC32",x,y,g,l,c,0,0);}
void Screen_DrawText32V_GBK(uint16_t x,uint16_t y,const uint8_t *g,uint16_t l,uint8_t c){draw_gbk("DCV32",x,y,g,l,c,0,0);}

/* 48号字体GBK文本绘制 */
void Screen_DrawText48_GBK(uint16_t x,uint16_t y,const uint8_t *g,uint16_t l,uint8_t c,uint8_t t)
{draw_gbk("DC48",x,y,g,l,c,t,1);}

/* =========================================================
   版本查询
   ========================================================= */

/* 查询屏幕版本信息 */
void Screen_Ver(void)
{
    uint16_t p=0;
    p=buf_str(p,"VER();\r\n");
    send_buf(p);
}

/**
 * @brief  清除内容区（保留标题和边框）
 * @note   假设屏幕分辨率 128x128，标题高度28像素，边框占1像素
 */
void Screen_ClearContent(void)
{
     elog_i("Screen", "Clearing screen content...");
    // 内容区域坐标：
    // 左上角 x=1, y=28（标题下方一行）
    // 右下角 x=126, y=127（屏幕右下角）
    Screen_BoxFill(1, 28, 126, 127, BG_COLOR);
}