#!/bin/bash

# Script to pretty print the output of the github-mcp-server
# log.
#
# It uses colored output when running on a terminal.

# show script help
show_help() {
  cat <<EOF
Usage: $(basename "$0") [file]

If [file] is provided, input is read from that file.
If no argument is given, input is read from stdin.

Options:
  -h, --help      Show this help message and exit
EOF
}

# choose color for stdin or stdout if we are printing to
# an actual terminal
color(){
  io="$1"
  if [[ "$io" == "stdin" ]]; then
    color="\033[0;32m" # green
  else
    color="\033[0;36m" # cyan
  fi
  if [ ! $is_terminal = "1" ]; then
    color=""
  fi
  echo -e "${color}[$io]"
}

# reset code if we are printing to an actual terminal
reset(){
  if [ ! $is_terminal = "1" ]; then
    return
  fi
  echo -e "\033[0m"
}


# Handle -h or --help
if [[ "$1" == "-h" || "$1" == "--help" ]]; then
  show_help
  exit 0
fi

# Determine input source
if [[ -n "$1" ]]; then
  if [[ ! -r "$1" ]]; then
    echo "Error: File '$1' not found or not readable." >&2
    exit 1
  fi
  input="$1"
else
  input="/dev/stdin"
fi

# check if we are in a terminal for showing colors
if test -t 1; then
  is_terminal="1"
else
  is_terminal="0"
fi

# Processs each log line, print whether is stdin or stdout, using different
# colors if we output to a terminal, and pretty print json data using jq
sed -nE 's/^.*\[(stdin|stdout)\]:.* ([0-9]+) bytes: (.*)\\n"$/\1 \2 \3/p' $input |
while read -r io bytes json; do
  # Unescape the JSON string safely
  unescaped=$(echo "$json" | awk '{ print "echo -e \"" $0 "\" | jq ." }' | bash)
  echo  "$(color $io)($bytes bytes):$(reset)"
  echo "$unescaped" | jq .
  echo
done