#!/bin/sh
# Dash installer — curl -fsSL https://raw.githubusercontent.com/Dvorinka/Dash/main/install.sh | sh
# Creates ./dash, writes a compose file, pulls the image, starts on :3000.
set -eu

DIR="${DASH_DIR:-dash}"
PORT="${DASH_PORT:-3000}"
IMAGE="ghcr.io/dvorinka/dash:latest"
DATA_HINT=""

info() { printf '  %s\n' "$1"; }
fail() { printf 'error: %s\n' "$1" >&2; exit 1; }

command -v docker >/dev/null 2>&1 || fail "docker not found — install Docker first: https://docs.docker.com/engine/install"
docker info >/dev/null 2>&1 || fail "docker daemon not reachable — start it, or run with sudo/root"

mkdir -p "$DIR/data"
cd "$DIR"

# compose.yml with a bind mount (data dir visible next to the file) or, when
# Docker Desktop file sharing forbids it, a named volume.
write_compose() {
    if [ "$1" = "named" ]; then
        cat > compose.yml <<EOF
# Generated by Dash install.sh - safe to edit.
services:
  dash:
    image: $IMAGE
    ports:
      - "$PORT:3000"
    volumes:
      - dash-data:/data
    restart: unless-stopped

volumes:
  dash-data:
EOF
    else
        cat > compose.yml <<EOF
# Generated by Dash install.sh - safe to edit.
services:
  dash:
    image: $IMAGE
    ports:
      - "$PORT:3000"
    volumes:
      - ./data:/data
    restart: unless-stopped
EOF
    fi
}

if docker compose version >/dev/null 2>&1; then
    write_compose bind
    docker compose pull
    if up_out=$(docker compose up -d --remove-orphans 2>&1); then
        DATA_HINT="$(pwd)/data"
    elif printf '%s' "$up_out" | grep -qi "not shared\|mounts denied"; then
        info "Host path not shareable - retrying with a named volume"
        write_compose named
        docker compose up -d --remove-orphans
        DATA_HINT="the 'dash-data' docker volume (docker volume ls | grep dash-data)"
    else
        printf '%s\n' "$up_out" >&2
        exit 1
    fi
else
    # No compose plugin — named volume keeps docker run free of host-path rules.
    info "Compose plugin absent; using docker run"
    docker rm -f dash >/dev/null 2>&1 || true
    docker pull "$IMAGE"
    docker run -d --name dash --restart unless-stopped \
        -p "$PORT:3000" -v dash-data:/data "$IMAGE"
    DATA_HINT="docker volume 'dash-data'"
fi

info ""
info "Dash is up: http://localhost:$PORT"
info "Data lives in $DATA_HINT — back it up to back up everything."
info "Upgrade later: docker compose pull && docker compose up -d   (or: docker pull $IMAGE && docker restart dash)"