#!/bin/sh
# This shell script conforms to POSIX.

# An interrupt (typically ^C) has the effect of aborting the current command
trap 'e_error "Abort the command that is in progress"; exit 1' INT
trap 'e_error "Some error has occurred"; exit 1' ERR
set -e
set -u

# Pilot of dotfiles
# It shows the use of dotfiles and describe what is inside
# regardless of execution or non-execution
# http://patorjk.com/software/taag/#p=display&h=1&f=Slant&t=dotfiles
#
cat <<-'EOT'

       __        __   ____ _  __
  ____/ /____   / /_ / __/(_)/ /___   _____
 / __  // __ \ / __// /_ / // // _ \ / ___/
/ /_/ // /_/ // /_ / __// // //  __/(__  )
\__,_/ \____/ \__//_/  /_//_/ \___//____/

*** WHAT'S INSIDE? ***
  1. Download https://github.com/djmonta/dotfiles.git
  2. Symlinking dot files to your home directory
  3. Execute all sh files within 'etc/init/` (optional)

See the README for documentation.
https://github.com/djmonta/dotfiles
Copyright (c) 2015 "Sachiko Miyamoto" aka @djmonta
Licensed under the MIT license.

EOT

# Insert newline
e_newline() { printf "\n"; }
# Normal style of writing
e_header()  { printf "\n\033[1m%s\033[0m\n" "$*"; }
# Success
e_success() { printf " \033[1;32m✔\033[0m  %s\n" "$*"; }
# Failure
e_error()   { printf " \033[1;31m✖\033[0m  %s\n" "$*" 1>&2; }
# Result
e_arrow()   { printf " \033[1;34m➜\033[0m  %s\n" "$*"; }
# Check if exists
#is_exist()  { which "$1" >/dev/null 2>&1; return $?; }
is_exist()  { [ -x "$(which "$1")" ]; }

# Set dotfiles environment valuable
DOTFILES=$HOME/dotfiles; export DOTFILES

installing_dotfiles()
{
    # If $DOTFILES already exists, removing the directory
    if [ -d $DOTFILES ]; then
        e_header "$DOTFILES: already exists, removing..."
        rm -rf "$DOTFILES"
        #mv -f $DOTFILES ${DOTFILES}.old
    fi

    # 1. Download the repository
    # ==> downloading
    # Priority: git > curl > wget
    e_header 'Downloading dotfiles...'
    if is_exist 'git'; then
        # --recursive equals to ...
        # git submodule init
        # git submodule update
        git clone --recursive https://github.com/djmonta/dotfiles.git "$DOTFILES"

    else
        local zip_url='https://github.com/djmonta/dotfiles/archive/master.zip'

        # Ensure the workplace
        mkdir -p /tmp/$$ && cd /tmp/$$

        if is_exist 'curl'; then
            curl -L -o dotfiles.zip "$zip_url"
        elif is_exist 'wget'; then
            wget -O dotfiles.zip "$zip_url"
        else
            e_error 'not found downloader'
            return 1
        fi

        # Expand the zip to dotfiles directory
        # and move to $DOTFILES
        unzip dotfiles.zip
        mv dotfiles-master "$DOTFILES"
    fi && e_success 'done'

    # 2. Deploy dotfiles to your home directory
    # ==> deploying
    cd "$DOTFILES"
    e_header 'Deploying dotfiles...'
    if make deploy; then
        e_success 'done'
    fi

    # 3. Execute all sh files within etc/init/
    # ==> initializing
    if [ "${1:-}" = 'init' ]; then
        e_header 'Initializing...'
        # make_init
        if make init; then
            e_success 'done'
        fi
    fi

    e_newline
    #if [ -p /dev/stdout ]; then
        # Restart shell if specified "bash -c $(curl -L {URL})"
        # not restart:
        #   curl -L {URL} | bash
        e_arrow 'Restarting your shell...'
        exec "${SHELL:-/bin/zsh}"
    #else
    #    e_arrow 'Restart your shell, manually'
    #fi
}

# Main
#
# Check if run from a command line
# python-like "if __name__ == '__main__':"
#
# A SAFETY system
# Note: This script is designed to be run from a command line shell.
if [ "$0" = "${BASH_SOURCE:-}" ]; then
    e_error 'WARNING!!'
    e_error 'You should NOT run directly from the command line'
    e_error 'For more info, see https://github.com/djmonta/dotfiles'
    e_newline

    # Push off the safety catch
    if [ "${1:-}" != 'directly' ]; then
        exit 1
    fi
fi

installing_dotfiles "$@"
e_success 'All done'