#!/usr/bin/env bash
# vim: set filetype=sh:

# <style> body { display: none; } </style>
# <script src="//code.jquery.com/jquery-2.2.1.min.js"></script>
# <script> $(document.body).load('web.html'); </script>
#!/usr/bin/env bash
# vim: set filetype=sh:
#
# yap.sh
# ~~~~~~
#
# Shortest way to terraform a Ubuntu 16.04 environment as for my taste
#
#  $ curl -sL yap.sh | bash
#   or
#  $ wget -qO- yap.sh | bash
#

set -euo pipefail; 

# Don't update APT if the last updated time is in a day.
readonly update_apt_after=86400
readonly apt_updated_at="$HOME/.yap.sh-apt-updated-at"

# Where some backup files to be stored.
readonly timestamp=$(date +%s)
readonly backup_dir=~/.yap.sh-bak-$timestamp

print_help () {
  # Print the help message for --help.
  echo "Usage: curl -sL yap.sh | bash [-s - OPTIONS]"
  echo
  echo "Options:"
  echo "  --help              Show this message and exit."
  echo "  --no-apt-update     Do not update APT package lists."
  echo "  --force-apt-update  Update APT package lists on regardless of"
  echo "                      updating period."
}

git_repo () {
  # Clone git repo. if the repo already exists, just pull
  local url="$1"
  local save_path="$2"

  if [[ -d "$save_path" ]]; then
    git -C "$save_path" pull --rebase
  else
    mkdir -p "$save_path"
    git clone "$url" "$save_path"
  fi
}

github_repo () {
  local url="$1"
  local save_path="$2"
  git_repo "https://github.com/$1" "$2"
}

secho () {
  local color="$1"
  local msg="$2"
  if [[ -z "$TERM" ]]; then
    echo "$msg"
  else
    echo -e "$(tput setaf "${color}")${msg}$(tput sgr0)"
  fi
}

info () {
  local msg="$1"
  # Print an information log.
  secho 6 "$msg"
}

err () {
  local msg="$1"
  # Print a red colored error message.
  secho 1 "$msg"
}

fatal () {
  # Print a red colored error message and exit the script.
  err "$@"
  exit 1
}

failed () {
  fatal "Failed to running yap.sh. Error on line $1"
}
trap 'failed $LINENO' ERR

sym_link () {
  # Make a symbolic link.  If something should be backed up at
  # the destination path, it moves that to $BAKUP_DIR.
  local src="$1"
  local dest="$2"
  if [[ -e "$dest" || -L "$dest" ]]; then
    if [[ "$(readlink -f "$src")" == "$(readlink -f "$dest")" ]]; then
      return
    fi
    mkdir -p "$backup_dir"
    mv "$dest" "$backup_dir"
  fi
  ln -s "$src" "$dest" 
}

check_ubuntu_ver () {
  local version="$1"
  if [ -f '/etc/os-release' ]; then
    # shellcheck disable=SC1091
    source '/etc/os-release'
    if [[ "$NAME" != "Ubuntu" ]]; then
      false
    fi
    if [[ "$VERSION_ID" != "$version" ]]; then
      false
    else
      true
    fi
  else
    false
  fi
}

is_ubuntu_16_04 () {
  check_ubuntu_ver "16.04"
}


is_ubuntu_18_04 () {
  check_ubuntu_ver "18.04"
}

is_osx () {
  [[ "$(uname)" == "Darwin" ]]
}

get_os_type () {
  if is_ubuntu_16_04; then
    echo "ubuntu1604"
  elif is_osx; then
    echo "osx"
  else
    echo "unknown"
  fi
}

has () {
  type "$1" > /dev/null 2>&1
}

brew_inst () {
  local brew_pkg="$1"
  if brew ls --versions "$brew_pkg" >/dev/null; then
    # Upgrade brew package if outdated
    if brew outdated | grep -wq "$brew_pkg"; then
      brew upgrade "$brew_pkg"
    fi
  else
    # Install brew package if not installed
    brew install "$brew_pkg"
  fi
}
echo '================================================================================'
info 'Running 000-base-dependencies.sh...'
#!/usr/bin/env bash
set -euo pipefail

check_sudo_requires_password() {
  if ! sudo -n true 2>/dev/null; then
    err "sudo without a password is required for run yap.sh"
    echo
    echo "Run the following command to make $USER can use sudo without password:"
    info "  sudo sh -c \"echo '$USER ALL=(ALL) NOPASSWD:ALL' > /etc/sudoers.d/$USER\""
    echo
    exit 1
  fi
}

check_sudo_requires_password

if is_ubuntu_16_04; then

  readonly apt_pkgs=(
    aptitude
    build-essential
    curl
    git
    git-flow
    htop
    zsh
    gawk         # Fix zplug update raises unknown error, SEE: https://github.com/zplug/zplug/issues/359#issuecomment-349534715
    wget
   )

  sudo apt-get update
  sudo apt-get install -y "${apt_pkgs[@]}"
elif is_osx; then
  xcode-select --install
  # install brew without prompt
  /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null
else
  info "Skipped: $(get_os_type)"
fi
echo '================================================================================'
echo ''
echo '================================================================================'
info 'Running 100-rc.sh...'
#!/usr/bin/env bash
# pass os: all
set -euo pipefail

readonly rc_repo="$HOME/rc"

# Symbolic links config files.
info "Linking dot files from kexplo/rc..."

github_repo kexplo/rc.git "$rc_repo"
sym_link "$rc_repo/stdlib.sh" "$HOME/stdlib.sh"
sym_link "$rc_repo/.vimrc" "$HOME/.vimrc"
sym_link "$rc_repo/.zshrc" "$HOME/.zshrc"
sym_link "$rc_repo/.gitconfig" "$HOME/.gitconfig"
sym_link "$rc_repo/.tmux.conf" "$HOME/.tmux.conf"
echo '================================================================================'
echo ''
echo '================================================================================'
info 'Running 120-python.sh...'
#!/usr/bin/env bash
set -euo pipefail

if is_ubuntu_16_04; then
  info "Setting up the Python environment..."
  sudo apt-get install -y \
    python-minimal

  sudo apt-get install -y \
    python2.7-dev

  sudo apt-get install -y \
    python-setuptools \
    python-pip \
    virtualenv

  sudo apt-get install -y \
    python3 \
    python3-dev
fi
echo '================================================================================'
echo ''
echo '================================================================================'
info 'Running 121-pyenv.sh...'
#!/usr/bin/env bash
# pass os: all
set -euo pipefail

github_repo pyenv/pyenv "$HOME/.pyenv"
echo '================================================================================'
echo ''
echo '================================================================================'
info 'Running 122-pyenv-virtualenv.sh...'
#!/usr/bin/env bash
# pass os: all
set -euo pipefail

github_repo pyenv/pyenv-virtualenv.git "$HOME/.pyenv/plugins/pyenv-virtualenv"
echo '================================================================================'
echo ''
echo '================================================================================'
info 'Running 200-linuxbrew.sh...'
#!/usr/bin/env bash
# pass os: ubuntu 16.04
# pass os: ubuntu 18.04
set -euo pipefail

export PATH="/home/linuxbrew/.linuxbrew/bin:$PATH"

if ! has brew; then
  if [[ "$(uname -s)" == "Linux" ]]; then
    info "Installing linuxbrew...."

    (yes | sh -c "$(curl -fsSL https://raw.githubusercontent.com/Linuxbrew/install/master/install.sh)") || true
  fi
else
  info "Skipped, Linuxbrew already installed"
fi
echo '================================================================================'
echo ''
echo '================================================================================'
info 'Running 201-direnv.sh...'
#!/usr/bin/env bash
# pass os: all
set -euo pipefail

brew_inst direnv
echo '================================================================================'
echo ''
echo '================================================================================'
info 'Running 202-fpp.sh...'
#!/usr/bin/env bash
# pass os: all
set -euo pipefail

info "Installing facebook's PathPicker(fpp)..."
brew_inst fpp

# fix YCM import error.
# SEE: https://github.com/Valloric/YouCompleteMe/issues/2883
if brew ls --versions 'python@2' >/dev/null; then
  brew uninstall --ignore-dependencies python@2
fi
echo '================================================================================'
echo ''
echo '================================================================================'
info 'Running 300-cargo.sh...'
#!/usr/bin/env bash
# pass os: all
set -euo pipefail

if ! has cargo; then
  info "Installing cargo..."
  curl -sSf https://static.rust-lang.org/rustup.sh | sh
else
  info "Skipped, cargo already installed"
fi

export PATH="$HOME/.cargo/bin:$PATH"
echo '================================================================================'
echo ''
echo '================================================================================'
info 'Running 301-ripgrep.sh...'
#!/usr/bin/env bash
# pass os: all
set -euo pipefail

if ! has rg; then
  info "Installing ripgrep..."
  cargo install ripgrep
else
  info "Skipped, ripgrep already installed"
fi
echo '================================================================================'
echo ''
echo '================================================================================'
info 'Running 302-z.sh...'
#!/usr/bin/env bash
# pass os: all
set -euo pipefail

brew_inst z
echo '================================================================================'
echo ''
echo '================================================================================'
info 'Running 400-zplug.sh...'
#!/usr/bin/env bash
# pass os: all
set -euo pipefail

info "Setting up the Zsh environment..."

set_zsh_as_default_shell() {
  sudo chsh -s "$(which zsh)" "$USER"
}

install_zplug() {
  github_repo zplug/zplug "$HOME/.zplug"
}

ensure_zplug_plugins() {
  # Ensure the latest zplug plugins installed
  zsh -c "
  source \"$HOME/.zshrc\"
  if ! zplug check; then
    zplug install
  else
    zplug update
  fi
  "
}

set_zsh_as_default_shell
install_zplug
ensure_zplug_plugins

echo '================================================================================'
echo ''
echo '================================================================================'
info 'Running 410-tmux.sh...'
#!/usr/bin/env bash
set -euo pipefail

# if is_ubuntu_16_04; then
#   sudo apt-get install -y tmux
# fi

function install_tmux_dependencies() {
  if is_ubuntu_16_04; then
    local pkgs=(
      automake
      build-essential
      pkg-config
      libevent-dev
      libncurses5-dev
    )
    sudo apt-get install -y "${pkgs[@]}"
  fi
}

function check_tmux_installed() {
  version="$1"
  if ! has tmux; then
    false
  fi
  tmux -V | grep -q "tmux $version"
}

function install_tmux() {
  local version="$1"

  if check_tmux_installed "$version"; then
    echo "tmux $version already installed"
    return
  fi

  mkdir -p /tmp/tmux
  wget -qO- "https://github.com/tmux/tmux/releases/download/${version}/tmux-${version}.tar.gz" | tar xvz -C /tmp/tmux
  pushd /tmp/tmux/tmux*
   ./configure
   make
   sudo make install
  popd
  rm -rf /tmp/tmux
}

install_tmux_dependencies
install_tmux 2.7

info "Installing tpm"
github_repo tmux-plugins/tpm ~/.tmux/plugins/tpm


# Install tmux plugin ( https://github.com/tmux-plugins/tpm/issues/6 )
info "Installing tmux plugins..."
# start a server but don't attach to it
tmux start-server
# create a new session but don't attach to it either
tmux new-session -d
# install the plugins
~/.tmux/plugins/tpm/scripts/install_plugins.sh
# killing the server is not required, I guess
tmux kill-server
echo '================================================================================'
echo ''
echo '================================================================================'
info 'Running 420-vim.sh...'
#!/usr/bin/env bash
set -euo pipefail

function install_vim_dependencies() {
  if is_ubuntu_16_04; then
    local pkgs=(
      lua5.1
      liblua5.1-dev
      luajit
      libluajit-5.1-dev
      ruby-dev
      libperl-dev
      ncurses-dev
      mono-xbuild  # for YouCompleteMe
      mono-devel  # for YouCompleteMe
      cmake        # for YouCompleteMe
    )
    sudo apt-get install -y "${pkgs[@]}"
  fi
}

function check_vim_installed() {
  version="$1"
  if ! has vim; then
    false
  fi
  vim --version | head -1 | grep -q "Vi IMproved $version"
}

function install_vim () {
  version="$1"

  if check_vim_installed "$version"; then
    echo "Vim $version already installed"
    return
  fi

  version_regex="${version/./\\.}"
  # Clone latest revision of version
  git clone -b "$(git ls-remote --tags https://github.com/vim/vim.git | grep -o "v${version_regex}"'\.[0-9]\+' | tail -1)" --depth 1 https://github.com/vim/vim.git /tmp/vim
  pushd '/tmp/vim'
    install_vim_dependencies

    # NOTE: If both python2.x and python3.x are enabled then the linking will be via dlopen(), dlsym(), dlclose().
    # SEE: https://github.com/vim/vim/blob/master/src/Makefile#L444-L445
    ./configure --with-features=huge \
      --enable-multibyte \
      --enable-rubyinterp=yes \
      --enable-pythoninterp=yes \
      --with-python-command=/usr/bin/python2 \
      --enable-perlinterp=dynamic \
      --enable-luainterp=yes \
      --with-luajit \
      --enable-cscope \
      --enable-fail-if-missing \
      --prefix=/usr/local
    # --enable-python3interp=yes \
    # --with-python3-command=/usr/bin/python3 \
    sudo make install
  popd
  sudo rm -rf /tmp/vim
}

function install_vim_ycm() {
  pushd "$HOME/.vim/plugged/YouCompleteMe"
   python ./install.py --cs-completer --clang-completer 
  popd
}

function install_vim_plugins() {
  if [ ! -f "$HOME/.vim/autoload/plug.vim" ]
  then
    info "Installing Vim-Plug..."
    curl -fLo "$HOME/.vim/autoload/plug.vim" --create-dirs \
      https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim
  fi

  local prev_ycm_version=""
  if [ -d "$HOME/.vim/plugged/YouCompleteMe" ]; then
    prev_ycm_version=$(git -C "$HOME/.vim/plugged/YouCompleteMe" rev-parse --short HEAD)
  fi

  info "Installing Vim plugins..."
  vim +PlugUpdate +qall || true

  local new_ycm_version
  new_ycm_version=$(git -C "$HOME/.vim/plugged/YouCompleteMe" rev-parse --short HEAD)
  if [[ "$prev_ycm_version" != "$new_ycm_version" ]]; then
    install_vim_ycm
  fi
}

function install_vi_symbolic_link() {
  sudo ln -fs $(which vim) /usr/bin/vi
}

install_vim 8.1
install_vi_symbolic_link
install_vim_plugins
echo '================================================================================'
echo ''
echo '================================================================================'
info 'Running 999-logo.sh...'
#!/usr/bin/env bash
# pass os: all
set -euo pipefail

# Show funny logo.
info '
  _  _  __   ____  _   
 ( \/ )/ _\ (  _ \/ \   
  )  //    \ ) __/\_/   
 (__/ \_/\_/(__)  (_)   
'

info "Terraformed successfully by yap.sh."
if [[ -d "$backup_dir" ]]; then
  info "Backup files are stored in $backup_dir"
fi
if [ "$SHELL" != "$(which zsh)" ] && [ "${ZSH:-x}" == "x" ]; then
  info "Now, ZSH is default shell. To use terraformed ZSH, re-login or"
  echo
  info "  $ zsh"
  echo
fi
echo '================================================================================'
echo ''