#!/bin/sh
# Amfora installer.
#
#   curl -fsSL https://amfora.solutionmax.net/get | sh            published image (default)
#   curl -fsSL https://amfora.solutionmax.net/get | sh -s -- --source   build the release tag yourself
#
# Keep execution inside main so a partial download cannot run a partial body.
main() {
    set -eu
    # Bumped by infra/update-versions.sh on every release, so a new install always
    # starts on the version the website announces.
    AMFORA_VERSION="2.2.0"
    IMAGE="ghcr.io/solutionmax/amfora:$AMFORA_VERSION"
    mode=image
    case "${1:-}" in
        ""|--docker|--image) ;;
        --source) mode=source ;;
        --help|-h)
            printf '%s\n' \
                "Amfora $AMFORA_VERSION installer" \
                '' \
                '  sh get            pull the published image and start it in ./amfora (Docker with Compose v2)' \
                '  sh get --source   clone the release tag and build it (also needs Git, Bash and Buildx 0.30+)' \
                '' \
                'Updating later: https://amfora.solutionmax.net/docs/#updating'
            return 0 ;;
        *) printf '%s\n' 'Unknown option. Use --help to see the choices.' >&2; return 2 ;;
    esac
    if [ "$#" -gt 1 ]; then
        printf '%s\n' 'Unexpected arguments. Use --help.' >&2
        return 2
    fi
    fail() { printf 'Amfora: %s\n' "$1" >&2; exit 1; }

    command -v docker >/dev/null 2>&1 || fail 'Install Docker first, then run this command again: https://docs.docker.com/engine/install/'
    docker info >/dev/null 2>&1 || fail 'Docker is not running or your account cannot access it.'
    docker compose version >/dev/null 2>&1 || fail 'Docker Compose v2 is required.'
    [ ! -e amfora ] && [ ! -L amfora ] || fail './amfora already exists. No files were changed. To update an existing installation see https://amfora.solutionmax.net/docs/#updating'
    if docker inspect amfora >/dev/null 2>&1 || docker volume inspect amfora_amfora_data >/dev/null 2>&1; then
        fail 'An Amfora container or data volume already exists. This installer only handles fresh installations.'
    fi

    if [ "$mode" = source ]; then
        for tool in git bash; do
            command -v "$tool" >/dev/null 2>&1 || fail "Install $tool first, then run this command again."
        done
        prune_help=$(docker buildx prune --help 2>/dev/null) || fail 'Docker Buildx 0.30 or later is required for --source.'
        for option in --max-used-space --reserved-space --min-free-space; do
            case "$prune_help" in *"$option"*) ;; *) fail 'Upgrade Docker Buildx to 0.30 or later.' ;; esac
        done
        export GIT_TERMINAL_PROMPT=0
        repo=https://github.com/Solutionmax/amfora.git
        printf 'Downloading Amfora %s into ./amfora...\n' "$AMFORA_VERSION"
        git clone --branch "v$AMFORA_VERSION" --depth 1 "$repo" amfora </dev/null ||
            fail 'Clone failed. Check your network connection and disk space; inspect any partial ./amfora directory before retrying.'
        cd amfora || fail 'Cannot enter the installation directory.'
        printf '%s\n' 'Building Amfora. The first build can take a while...'
        bash infra/build-docker.sh local </dev/null || fail 'Build failed; the application was not started. Source files remain in ./amfora.'
        AMFORA_IMAGE=amfora:local docker compose up -d </dev/null ||
            fail 'Startup failed. Review docker compose logs inside the amfora directory. No data was removed.'
    else
        mkdir amfora && cd amfora || fail 'Cannot create ./amfora here.'
        cat > docker-compose.yaml <<EOF
# Amfora $AMFORA_VERSION. Full reference with every option:
# https://github.com/Solutionmax/amfora/blob/v$AMFORA_VERSION/docker-compose.yaml
services:
  amfora:
    image: \${AMFORA_IMAGE:-$IMAGE}
    container_name: amfora
    environment:
      # The address people open, and the address the browser reaches storage on.
      # Change both to your HTTPS origins before you share links outside this machine.
      APP_URL: "http://localhost:5487"
      STORAGE_URL: "http://127.0.0.1:9379"
    ports:
      - "5487:5487"   # web interface
      - "9379:9379"   # bundled storage, the browser uploads and downloads here directly
    volumes:
      - amfora_data:/app/server
    restart: unless-stopped
    mem_limit: 4g
    cpus: 2.0
    security_opt:
      - no-new-privileges:true

volumes:
  amfora_data:
EOF
        printf 'Pulling %s...\n' "$IMAGE"
        docker compose pull </dev/null || fail 'Could not pull the image. Check your network connection; ./amfora/docker-compose.yaml is kept.'
        docker compose up -d </dev/null || fail 'Startup failed. Review docker compose logs inside the amfora directory. No data was removed.'
    fi
    printf '%s\n' '' "Amfora $AMFORA_VERSION is starting." \
        'Open http://localhost:5487 on this Docker host; the first account you create becomes the administrator.' \
        'For access from elsewhere set APP_URL and STORAGE_URL: https://amfora.solutionmax.net/docs/#deployment' \
        'Updating later: https://amfora.solutionmax.net/docs/#updating' \
        'Check startup with: cd amfora && docker compose logs --tail=100'
}
main "$@"