stages:
  - build
  - migrate
  - deploy
  - seed

default:
  tags:
    - self-hosted-stg

variables:
  DOCKER_BUILDKIT: "1"

  IMAGE_TAG: "staging_${CI_COMMIT_SHORT_SHA}"
  IMAGE_NAME: "${CI_REGISTRY_IMAGE}:${IMAGE_TAG}"
  IMAGE_LATEST: "${CI_REGISTRY_IMAGE}:staging_latest"

  DEPLOY_DIR: "/opt/deploy/stg-lti-api"
  COMPOSE_FILE: "docker-compose.yaml"

# =========================
# BUILD (AUTO)
# =========================
build_staging:
  stage: build
  rules:
    - if: '$CI_COMMIT_BRANCH == "staging"'
      when: on_success
    - when: never
  script: |
    set -e
    docker info

    echo "$CI_REGISTRY_PASSWORD" | docker login -u "$CI_REGISTRY_USER" --password-stdin "$CI_REGISTRY"

    echo "✅ Build image: $IMAGE_NAME"
    docker build -t "$IMAGE_NAME" -f Dockerfile .

    echo "✅ Push image: $IMAGE_NAME"
    docker push "$IMAGE_NAME"

    echo "✅ Tag latest: $IMAGE_LATEST"
    docker tag "$IMAGE_NAME" "$IMAGE_LATEST"
    docker push "$IMAGE_LATEST"

# =========================
# MIGRATE (AUTO)
# =========================
migrate_staging:
  stage: migrate
  rules:
    - if: '$CI_COMMIT_BRANCH == "staging"'
      when: on_success
    - when: never
  needs:
    - job: build_staging
      artifacts: false
  script: |
    set -e
    echo "✅ Running migrations (staging) ..."

    cd "$DEPLOY_DIR"
    test -f "$COMPOSE_FILE" || (echo "❌ $COMPOSE_FILE not found in $DEPLOY_DIR" && exit 1)
    test -f .env || (echo "❌ .env not found in $DEPLOY_DIR" && exit 1)

    set -a
    . ./.env
    set +a

    test -n "$DB_HOST" || (echo "❌ DB_HOST empty" && exit 1)
    test -n "$DB_PORT" || (echo "❌ DB_PORT empty" && exit 1)
    test -n "$DB_USER" || (echo "❌ DB_USER empty" && exit 1)
    test -n "$DB_PASSWORD" || (echo "❌ DB_PASSWORD empty" && exit 1)
    test -n "$DB_NAME" || (echo "❌ DB_NAME empty" && exit 1)

    export DATABASE_URL="postgres://${DB_USER}:${DB_PASSWORD}@${DB_HOST}:${DB_PORT}/${DB_NAME}?sslmode=${DB_SSLMODE:-disable}"
    echo "✅ DATABASE_URL=$DATABASE_URL"

    echo "✅ Ensuring postgres & redis running ..."
    docker compose -f "$COMPOSE_FILE" up -d stg-postgres-lti stg-redis-lti || true

    COMPOSE_NETWORK_KEY="$(docker compose -f "$COMPOSE_FILE" config | awk '/networks:/ {getline; print $1}' | tr -d ':')"
    echo "✅ Compose network key: $COMPOSE_NETWORK_KEY"

    NETWORK_NAME="$(docker network ls --format '{{.Name}}' | grep "_${COMPOSE_NETWORK_KEY}$" | head -n 1)"
    test -n "$NETWORK_NAME" || (echo "❌ Cannot find docker network for compose ($COMPOSE_NETWORK_KEY)" && exit 1)

    echo "✅ Docker network detected: $NETWORK_NAME"

    echo "✅ Checking migrations from repo..."
    ls -lah "$CI_PROJECT_DIR/internal/database/migrations"

    echo "✅ Running migrations via migrate/migrate container"
    set +e
    out=$(docker run --rm \
      --network "$NETWORK_NAME" \
      -v "$CI_PROJECT_DIR/internal/database/migrations:/migrations:ro" \
      migrate/migrate:v4.15.2 \
      -path=/migrations -database "$DATABASE_URL" up 2>&1)
    code=$?
    set -e

    echo "$out"

    if echo "$out" | grep -qi "no change"; then
      echo "✅ No change (already up to date)"
      exit 0
    fi

    if [ $code -ne 0 ]; then
      echo "❌ Migration failed with exit code $code"
      exit $code
    fi

    echo "✅ Migration applied successfully"

# =========================
# DEPLOY (AUTO)
# =========================
deploy_staging:
  stage: deploy
  rules:
    - if: '$CI_COMMIT_BRANCH == "staging"'
      when: on_success
    - when: never
  needs:
    - job: migrate_staging
      artifacts: false
    - job: build_staging
      artifacts: false
  script: |
    set -e
    docker info
    echo "$CI_REGISTRY_PASSWORD" | docker login -u "$CI_REGISTRY_USER" --password-stdin "$CI_REGISTRY"

    cd "$DEPLOY_DIR"
    test -f "$COMPOSE_FILE" || (echo "❌ $COMPOSE_FILE not found in $DEPLOY_DIR" && exit 1)
    test -f .env || (echo "❌ .env not found in $DEPLOY_DIR" && exit 1)

    docker compose -f "$COMPOSE_FILE" pull
    docker compose -f "$COMPOSE_FILE" up -d --force-recreate
    docker image prune -f

# =========================
# SEED (MANUAL)
# =========================
seed_staging:
  stage: seed
  rules:
    - if: '$CI_COMMIT_BRANCH == "staging"'
      when: manual
    - when: never
  needs:
    - job: deploy_staging
      artifacts: false
  allow_failure: false
  script: |
    set -e
    cd "$DEPLOY_DIR"
    test -f "$COMPOSE_FILE" || (echo "❌ $COMPOSE_FILE not found" && exit 1)
    test -f .env || (echo "❌ .env not found" && exit 1)

    docker compose -f "$COMPOSE_FILE" pull seed || true
    docker compose -f "$COMPOSE_FILE" run --rm seed