/*******************************************************************************
 * mm_output.c - Copyright (c) 2014 www.mahonri.info.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
 * NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *------------------------------------------------------------------------------
 * @file mm_output.c
 * @author www.mahonri.info
 * @brief Stream output related functions.
 */

/*******************************************************************************
 * Compiler setup.
 */
#include <errno.h>      // errno, ENOMEM
#include <stdio.h>      // printf(), fprintf(), stdin, stderr
#include <unistd.h>     // isatty()
#include <stdint.h>     // uint8_t

#include <mm_output.h>
#include <mm_types.h>
   
/*******************************************************************************
 * @brief If the stream is mapped to a tty device (console), the I__prompt will be emitted to stdout.
 * @param I__stream   FILE pointer for output stream provided by the caller.
 *                    (Caller may specify 'stdout' or any other valid FILE * stream.)
 * @param I__prompt   String to be emitted to the stream..
 *                    If NULL is specified, nothing will be emitted to the stream..
 * @return 0 or error code, including:
 *    EINVAL The caller-specified stream is NULL.
 *    ENOMEM Insufficient memory for operation.
 * @description:  This function suppresses its output if the I__stream is mapped to
 *                a file, pipe, etc.  It only emits its output to stdout if the
 *                specified I__stream is mapped to a tty device (ie: text console).
 */
int MM_OutputPrompt(
      FILE       *I__stream,
      const char *I__prompt
      )
   {
   int rCode = MM_SUCCESS;

   if(NULL == I__stream)
      {
      rCode=EINVAL;
      goto CLEANUP;
      }
      
   if(isatty(fileno(I__stream)))
      printf("%s", I__prompt);

CLEANUP:

   return(rCode);
   }

char *MM_OutputBackgroundColor_ANSI256(
      char        I__buf[9+1],
      uint8_t     I__color
      )
   {
   snprintf(I__buf, 17+1, "\x1b[48;5;%hhum", I__color);
    return(I__buf);
   }

char *MM_OutputForegroundColor_ANSI256(
      char        I__buf[9+1],
      uint8_t     I__color
      )
   {
   snprintf(I__buf, 17+1, "\x1b[38;5;%hhum", I__color);
    return(I__buf);
   }

char *MM_OUTPUT_Intensity(
      char                  I__buf[5+1]
      MM_OUTPUT_INTENSITY_T I__level,
      )
   {
   int level[] = {2, 22, 1};
   snprintf(I__buf, 5+1, "\x1b[%dm", level[I__level]);
   return(I__buf);
   }

char *MM_OUTPUT_ForegroundColor(
      MM_OUTPUT_COLOR_T I__color,
      char         I__buf[5+1]
      )
   {
   snprintf(I__buf, 5+1, "\x1b[3%dm", I__color);
   return(I__buf);
   }

char *MM_OUTPUT_BackgroundColor(
      MM_OUTPUT_COLOR_T I__color,
      char         I__buf[5+1]
      )
   {
   snprintf(I__buf, 5+1, "\x1b[4%dm", I__color);
   return(I__buf);
   }