#!/usr/bin/env bash

# Simple guard to check input args
[[ $# -eq 1 ]] || [[ $# -eq 2 ]] || {
    >&2 echo "Usage: ./build IMAGE [ACTION]"
    exit 1
}

# Extract current version from Cargo.toml & get current branch
patch_version="$(grep -Po '(?<=version = ").*(?=")' Cargo.toml | head -n1)"
major_version="$(echo "$patch_version" | 
    sed -E 's/([0-9]+)\.([0-9]+)\.([0-9]+)/\1/')"
minor_version="$(echo "$patch_version" |
    sed -E 's/([0-9]+).([0-9]+).([0-9]+)/\1.\2/')"
branch="$(git branch --show-current)"

if [[ "$branch" = "master" ]]; then
    tags=("$patch_version" "$minor_version" "$major_version" "latest")

elif [[ "$branch" = "develop" ]]; then
    tags=("$patch_version-dev" "$minor_version-dev" "$major_version-dev" "dev")

else
    tags=("$branch")

fi

# Run the actual build command
docker build -t "$1:$tags" .

if [[ "$2" = push ]]; then
    [[ "$branch" =~ ^develop|master$ ]] || {
        >&2 echo "You can only push from develop or master."
        exit 2
    }

    for tag in "${tags[@]}"; do
        # Create the tag
        docker tag "$1:$tags" "$1:$tag"

        # Push the tag
        docker push "$1:$tag"

        # Remove the tag again, if it's not the main tag
        [[ "$tag" != "$tags" ]] && docker rmi "$1:$tag"
    done

 elif [[ "$2" = run ]]; then
    docker run \
        --rm \
        --interactive \
        --tty \
        --publish 8000:8000 \
        "$1:$tags"
fi