#!/usr/bin/env bash
set -euo pipefail

########################################
# Config (edit these)
########################################
REGISTRY="git.sneakygeek.net"
NAMESPACE="sneakygeek"
IMAGE_NAME="sneakyscan"

# A helpful pointer/reference for your repo URL. Not used by docker commands,
# but kept for clarity and future automation if you want to clone/build elsewhere.
GIT_REPO_URL="https://git.sneakygeek.net/sneakygeek/sneakyscan.git"

# If you prefer to override the tag manually sometimes:
# export DOCKER_TAG=my-custom-tag
########################################

# Colors
BOLD='\033[1m'; DIM='\033[2m'; GREEN='\033[32m'; YELLOW='\033[33m'; RED='\033[31m'; NC='\033[0m'

# Helpers
confirm() {
  # Usage: confirm "Question?" default_yes|default_no
  local prompt response default
  if [[ "${2:-default_no}" == "default_yes" ]]; then
    prompt=" [Y/n] "
    default="y"
  else
    prompt=" [y/N] "
    default="n"
  fi
  read -r -p "$1$prompt" response || true
  response="${response:-$default}"
  [[ "$response" =~ ^[Yy]$ ]]
}

docker_tag_sanitize() {
  # Docker tag must be <=128 chars, allowed: [A-Za-z0-9_.-], usually lowercase for sanity
  local raw="$1"
  local lower="${raw,,}"
  local safe
  safe="$(printf '%s' "$lower" | tr -c 'a-z0-9_.-' '-')"
  printf '%.128s' "$safe"
}

detect_git_tag() {
  if git rev-parse --is-inside-work-tree >/dev/null 2>&1; then
    # Branch name or fallback to describe if detached
    local ref
    ref="$(git rev-parse --abbrev-ref HEAD 2>/dev/null || true)"
    if [[ "$ref" == "HEAD" || -z "$ref" ]]; then
      # detached HEAD → use nearest tag or short commit
      ref="$(git describe --tags --always --dirty 2>/dev/null || git rev-parse --short HEAD 2>/dev/null || echo 'detached')"
    fi
    docker_tag_sanitize "$ref"
  else
    # Not a git repo → default to "latest" unless DOCKER_TAG is set
    echo "latest"
  fi
}

main() {
  local image_repo="${REGISTRY}/${NAMESPACE}/${IMAGE_NAME}"
  local tag latest_tag push_it push_latest

  # Determine tag
  if [[ -n "${DOCKER_TAG:-}" ]]; then
    tag="$(docker_tag_sanitize "$DOCKER_TAG")"
  else
    tag="$(detect_git_tag)"
  fi

  echo -e "${BOLD}Image:${NC} ${image_repo}"
  echo -e "${BOLD}Tag:  ${NC} ${GREEN}${tag}${NC}"
  echo -e "${DIM}(git: $(git rev-parse --abbrev-ref HEAD 2>/dev/null || echo 'n/a'), repo: ${GIT_REPO_URL})${NC}"

  # Build
  echo -e "\n${BOLD}==> Building ${image_repo}:${tag}${NC}"
  docker build -t "${image_repo}:${tag}" .

  # Ask about :latest
  if confirm "Also tag as :latest?" default_no; then
    latest_tag="latest"
    echo -e "${BOLD}Tagging:${NC} ${image_repo}:${latest_tag}"
    docker tag "${image_repo}:${tag}" "${image_repo}:${latest_tag}"
    push_latest="yes"
  else
    push_latest="no"
  fi

  # Ask about pushing
  if confirm "Push the built image(s) now?" default_yes; then
    echo -e "\n${BOLD}==> Pushing ${image_repo}:${tag}${NC}"
    docker push "${image_repo}:${tag}"
    if [[ "$push_latest" == "yes" ]]; then
      echo -e "${BOLD}==> Pushing ${image_repo}:latest${NC}"
      docker push "${image_repo}:latest"
    fi
    echo -e "${GREEN}Done.${NC}"
  else
    echo -e "${YELLOW}Skipping push. Local images created:${NC}"
    echo "  - ${image_repo}:${tag}"
    [[ "$push_latest" == "yes" ]] && echo "  - ${image_repo}:latest"
  fi
}

main "$@"