#!/bin/bash
# Deploy Paper Dynasty Database API
# Usage: ./scripts/deploy.sh <dev|prod> [commit]
#
# Dev:  Force-updates the "dev" git tag → CI builds :dev Docker image
# Prod: Creates CalVer tag + force-updates "latest" and "production" git tags
#       → CI builds :<calver>, :latest, :production Docker images
set -euo pipefail

RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

REMOTE="origin"

usage() {
  echo "Usage: $0 <dev|prod> [commit]"
  echo ""
  echo "  dev  [commit]  Force-update 'dev' tag on HEAD or specified commit"
  echo "  prod [commit]  Create CalVer + 'latest' + 'production' tags on HEAD or specified commit"
  exit 1
}

[[ $# -lt 1 ]] && usage

ENV="$1"
COMMIT="${2:-HEAD}"

SHA=$(git rev-parse "$COMMIT" 2>/dev/null) || {
  echo -e "${RED}Invalid commit: $COMMIT${NC}"
  exit 1
}
SHA_SHORT="${SHA:0:7}"

git fetch --tags "$REMOTE"

if ! git branch -a --contains "$SHA" 2>/dev/null | grep -qE '(^|\s)(main|remotes/origin/main)$'; then
  echo -e "${RED}Commit $SHA_SHORT is not on main. Aborting.${NC}"
  exit 1
fi

case "$ENV" in
  dev)
    echo -e "${YELLOW}Deploying to dev...${NC}"
    echo -e "  Commit: ${SHA_SHORT}"

    git tag -f dev "$SHA"
    git push "$REMOTE" dev --force

    echo -e "${GREEN}Tagged ${SHA_SHORT} as 'dev' and pushed. CI will build :dev image.${NC}"
    ;;

  prod)
    echo -e "${YELLOW}Deploying to prod...${NC}"

    YEAR=$(date -u +%Y)
    MONTH=$(date -u +%-m)
    PREFIX="${YEAR}.${MONTH}."

    LAST_BUILD=$(git tag -l "${PREFIX}*" | sed "s/^${PREFIX}//" | sort -n | tail -1)
    BUILD=$((${LAST_BUILD:-0} + 1))
    CALVER="${PREFIX}${BUILD}"

    echo -e "  Commit:  ${SHA_SHORT}"
    echo -e "  Version: ${CALVER}"
    echo -e "  Tags:    ${CALVER}, latest, production"

    read -rp "Proceed? [y/N] " confirm
    [[ "$confirm" =~ ^[Yy]$ ]] || {
      echo "Aborted."
      exit 0
    }

    git tag "$CALVER" "$SHA"
    git tag -f latest "$SHA"
    git tag -f production "$SHA"

    git push "$REMOTE" "$CALVER"
    git push "$REMOTE" latest --force
    git push "$REMOTE" production --force

    echo -e "${GREEN}Tagged ${SHA_SHORT} as '${CALVER}', 'latest', 'production' and pushed.${NC}"
    echo -e "${GREEN}CI will build :${CALVER}, :latest, :production images.${NC}"
    ;;

  *)
    usage
    ;;
esac