#!/bin/sh

if '[' '-n' "${ZSH_VERSION-}" ']'; then
  'emulate' 'sh' '-o' 'err_exit' '-o' 'no_unset'
else
  'set' '-ue'
fi

platform="$('command' 'uname' '-sm')"
platform="$('printf' '%s' "$platform" | 'command' 'tr' '[A-Z]' '[a-z]')"

case "$platform" in
  'darwin x86_64');;
  'freebsd amd64');;
  'linux aarch64');;
  'linux armv6l');;
  'linux armv7l');;
  'linux armv8l');;
  'linux x86_64');;
  *)
    >&2 'printf' '\033[33mz4h\033[0m: sorry, unsupported platform: \033[31m%s\033[0m\n' "$platform"
    'exit' '1'
  ;;
esac

if command -v 'curl' >'/dev/null' 2>&1; then
  fetch='command curl -fsSLo'
elif command -v 'wget' >'/dev/null' 2>&1; then
  fetch='command wget -O'
else
  >&2 'printf' '\033[33mz4h\033[0m: please install \033[32mcurl\033[0m or \033[32mwget\033[0m\n'
  'exit' '1'
fi

>&2 'printf' '\033[33mz4h\033[0m: platform \033[32m%s\033[0m is supported\n' "$platform"

rcs=''

for f in ~/'.zshenv' ~/'.zprofile' ~/'.zshrc' ~/'.zlogin' ~/'.zlogout'; do
  if '[' '-e' "$f" ']'; then
    rcs="$rcs ${f##*/}"
  fi
done

backup_dir=''

if '[' '-n' "$rcs" ']'; then
  backup_dir='zsh-backup'
  if command -v 'date' >'/dev/null' 2>&1; then
    backup_dir="$backup_dir/$('command' 'date' '+%Y-%m-%d-%H-%M-%S')"
  fi
  if [ '-e' "$HOME/$backup_dir" ]; then
    i='1'
    while '[' '-e' "$HOME/$backup_dir.$i" ]; do
      i="$((i+1))"
    done
    backup_dir="$backup_dir.$i"
  fi
  >&2 'printf' '\033[33mz4h\033[0m: \033[32mz4h\033[0m startup files already exist\n'
  >&2 'printf' '\n'
  for f in $rcs; do
    >&2 'printf' '    \033[4m~/%s\033[0m\n' "${f##*/}"
  done
  >&2 'printf' '\n'
  >&2 'printf' '  \033[1m(1)\033[0m  Move them to \033[4m~/%s\033[0m\n' "$backup_dir"
  >&2 'printf' '  \033[1m(2)\033[0m  Delete them.\n'
  >&2 'printf' '  \033[1m(q)\033[0m  Quit and do nothing.\n'
  >&2 'printf' '\n'
  while 'true'; do
    >&2 'printf' '\033[1mChoice [12q]:\033[0m '
    IFS='' 'read' '-r' 'choice'
    case "$choice" in
      '1')
        backup_dir="$HOME/$backup_dir"
        'break'
      ;;
      '2')
        backup_dir=''
        'break'
      ;;
      'q')
        'exit' '1'
      ;;
      *)
        >&2 'printf' '\033[33mz4h\033[0m: invalid choice: \033[31m%s\033[0m\n' "$choice"
      ;;
    esac
  done
fi

zshenv=
zshrc=

'trap' '"trap" "-" "INT" "TERM" "EXIT"; "command" "rm" "-f" "--" "$zshenv" "$zshrc" 2>/dev/null' \
  'INT' 'TERM' 'EXIT'

if command -v 'mktemp' >'/dev/null' 2>&1; then
  zshenv="$('command' 'mktemp' "$HOME"/.zshenv.XXXXXXXXXX)"
  zshrc="$('command' 'mktemp' "$HOME"/.zshrc.XXXXXXXXXX)"
else
  zshenv="$HOME"/.zshenv.tmp."$$"
  zshrc="$HOME"/.zshrc.tmp."$$"
fi

url='https://raw.githubusercontent.com/romkatv/zsh4humans/v3'

>&2 'printf' '\033[33mz4h\033[0m: fetching \033[4m~/.zshenv\033[0m from \033[1mromkatv/zsh4humans\033[0m\n'
if ! err="$($fetch "$zshenv" '--' "$url"/.zshenv 2>&1)"; then
  >&2 'printf' "%s\n" "$err"
  >&2 'printf' '\033[33mz4h\033[0m: failed to download \033[31m%s\033[0m\n' "$url"/.zshenv
  'exit' '1'
fi

>&2 'printf' '\033[33mz4h\033[0m: fetching \033[4m~/.zshrc\033[0m from \033[1mromkatv/zsh4humans\033[0m\n'
if ! err="$($fetch "$zshrc" '--' "$url"/.zshrc 2>&1)"; then
  >&2 'printf' "%s\n" "$err"
  >&2 'printf' '\033[33mz4h\033[0m: failed to download \033[31m%s\033[0m\n' "$url"/.zshrc
  'exit' '1'
fi

if '[' '-n' "$backup_dir" ']'; then
  'command' 'mkdir' '-p' '--' "$backup_dir"
  for f in $rcs; do
    'command' 'cp' '--' "$f" "$backup_dir"/
  done
fi

if '[' '-n' "$rcs" ']'; then
  'command' 'rm' '-f' '--' $rcs
fi

'command' 'mv' '--' "$zshenv" ~/'.zshenv'
'command' 'mv' '--' "$zshrc" ~/'.zshrc'

'trap' '-' 'INT' 'TERM' 'EXIT'

>&2 'printf' '\033[33mz4h\033[0m: bootstrapping \033[32mzsh\033[0m environment\n'
'export' ZDOTDIR="$HOME"
Z4H_BOOTSTRAPPING='1'
'set' '+ue'
'set' '--'
'.' ~/'.zshenv'