#!/usr/bin/env bash

if ! go version &>/dev/null; then
    echo "Please install Golang and rerun this script"
    exit 1 
fi

go_version=$(go version | cut -d' ' -f3)
go_version_major=$(echo "${go_version:2}" | cut -d'.' -f1)
go_version_minor=$(echo "${go_version:2}" | cut -d'.' -f2)

# install_dep.sh installs to /tmp/gopath/bin
# add it to path just in case
PATH=/tmp/gopath/bin:$PATH

if [ "$go_version_major" -gt 1 ]; then
    # good to go - future proof ;)
    echo "Building & installing ..."
    make install
elif [ "$go_version_major" -eq 1 ] && [ "$go_version_minor" -ge 11 ]; then
    # good to go - we have go modules
    echo "Building & installing ..."
    make install
elif dep version &>/dev/null; then
    if ! dep init; then
        echo "\`dep init\` failed - bootstraping GOPATH ..."
        export GOPATH=$(mktemp /tmp/gopath-XXX)
        project_path=$GOPATH/src/github.com/curusarn/resh
        mkdir -p "$project_path"
        cp -rf . "$project_path"
        cd "$project_path"
        if ! dep init; then
            echo "Unexpected ERROR while running \`dep init\`!"
            echo "Try running \`make install\`"
            exit 3
        fi
        echo "Succesfuly bootstraped GOPATH"
    fi
    echo "Building & installing ..."
    make install
else
    echo "Please update your Golang to version >= 1.11 OR install dep and rerun this script"
    echo "If you have trouble installing dep you can run \`./install_dep.sh\` in this directory"
    exit 2
fi