#!/usr/bin/env bash

# package_dirs records directories of all installed packages. It is used
# to help clean unused packages.
package_dirs_file=/tmp/my-vim-package-dirs
[ -f $package_dirs_file ] && rm $package_dirs_file

package_dirs=()

update_package () {
    name=$1
    remote_url=$2

    load_type='start'
    [ $# -ge 3 ] && load_type=$3

    package_dir="$HOME/.vim/pack/vendor/$load_type/$name"
    echo "$package_dir" >> $package_dirs_file
    if [ ! -d $package_dir ]; then
        echo "$name : Installing ... "
        mkdir -p $package_dir
        git clone --depth 1 $remote_url $package_dir && echo "$name : Done" || echo "$name : FAIL"
    fi

    cd $package_dir
    git fetch origin > /dev/null

    UPSTREAM='@{u}'
    LOCAL=$(git rev-parse @)
    REMOTE=$(git rev-parse "$UPSTREAM")
    BASE=$(git merge-base @ "$UPSTREAM")
    UPDATED=0

    if [ $LOCAL != $REMOTE -a $LOCAL = $BASE ]; then
        echo "$name : Updating ... "
        git pull && echo "$name : Done" || echo "$name : FAIL"
        UPDATED=1
    else
        echo "$name : Up to date"
    fi

    git submodule update --init --recursive --depth 1

    if [ $UPDATED -eq 1 -a $# -ge 4 ]; then
        $4
    fi
}

clean () {
    if [ ! -f $package_dirs_file ]; then
        return
    fi

    while IFS= read -r line; do
        package_dirs+=("$line")
    done < $package_dirs_file

    for load_type in 'opt' 'start'; do
        for package_name in $(ls $HOME/.vim/pack/vendor/$load_type); do
            package_dir=$HOME/.vim/pack/vendor/$load_type/$package_name
            if [[ ! " ${package_dirs[*]} " =~ " ${package_dir} " ]]; then
                read -r -p "rm -rf $package_dir? [y/N]: " response
                response=${response,,}
                if [[ "$response" =~ ^(yes|y)$ ]]; then
                    rm -rf $package_dir
                fi
            fi
        done
    done

    rm $package_dirs_file
}

install_ycm () {
    opts=' --clangd-completer'

    if [ -f /usr/bin/go -o -f /usr/local/bin/go ]; then
        opts="$opts --go-completer"
    fi

    python3 ./install.py $opts
}

update_package 'YouCompleteMe' 'https://github.com/ycm-core/YouCompleteMe.git' 'start' 'install_ycm' &
update_package "nnn.vim" "https://github.com/mcchrish/nnn.vim.git" &
update_package 'vim-fugitive' 'https://github.com/tpope/vim-fugitive.git' &
update_package 'fzf' 'https://github.com/junegunn/fzf.git' &
update_package 'fzf.vim' 'https://github.com/junegunn/fzf.vim.git' &
update_package 'ultisnips' 'https://github.com/SirVer/ultisnips.git' &
update_package 'vim-snippets' 'https://github.com/honza/vim-snippets.git' &
update_package 'onedark.vim' 'https://github.com/joshdick/onedark.vim.git' 'opt' &
update_package undotree https://github.com/mbbill/undotree.git &
update_package ale https://github.com/dense-analysis/ale.git &
update_package vim-eunuch https://github.com/tpope/vim-eunuch.git &
update_package vim-sleuth https://github.com/tpope/vim-sleuth.git &
update_package tabular https://github.com/godlygeek/tabular.git &
update_package vim-rooter https://github.com/airblade/vim-rooter.git &
update_package vim-gutentags https://github.com/ludovicchabant/vim-gutentags.git &
update_package vim-airline https://github.com/vim-airline/vim-airline.git &
update_package vim-airline-themes https://github.com/vim-airline/vim-airline-themes.git &
update_package vim-easymotion https://github.com/easymotion/vim-easymotion.git &
update_package editorconfig-vim https://github.com/editorconfig/editorconfig-vim.git &
update_package vim-godot https://github.com/habamax/vim-godot.git &
update_package vim-ledger https://github.com/ledger/vim-ledger.git &
update_package vim-signify https://github.com/mhinz/vim-signify.git &
update_package vim-unimpaired https://github.com/tpope/vim-unimpaired.git &

wait 
vim '"+helptags ALL"' +q

clean