# ─────────────────────────────────────────────────────────────────────────────
# Docker stack deploy pipeline — mirrors .gitea/workflows/deploy.yml
#
# Triggered on pushes to main when files under apps/*.tfvars change.
# Two jobs run in sequence:
#   deploy-docker   — loops over added/modified tfvars and applies each app
#   destroy-docker  — loops over deleted tfvars, recovers content from git
#                     history, destroys each app and removes its workspace
#
# Both jobs process all changed files sequentially (GitLab CI does not support
# dynamic matrix jobs natively). A failure in one app is recorded but processing
# continues for the remaining apps (fail-fast: false equivalent).
#
# Key difference from Gitea: deleted tfvars content is recovered via
#   git show $CI_COMMIT_BEFORE_SHA:$TFVARS
# instead of checking out the previous commit.
# ─────────────────────────────────────────────────────────────────────────────

# ─── Shared template: OpenTofu + gopass setup ────────────────────────────────
.deploy_base:
  image: ubuntu:22.04
  variables:
    # Full clone so git show $CI_COMMIT_BEFORE_SHA works for deleted files
    GIT_DEPTH: "0"
  before_script:
    - apt-get update -qq && apt-get install -y -qq curl git jq gnupg
    - |
      curl -fsSL https://get.opentofu.org/install-opentofu.sh \
        | sh -s -- --install-method=standalone --opentofu-version=$TOFU_VERSION
    - |
      curl -fsSL https://github.com/gopasspw/gopass/releases/latest/download/gopass-linux-amd64.tar.gz \
        | tar xz
      mv gopass /usr/local/bin/
    - |
      echo "$GOPASS_GPG_KEY" | gpg --batch --import
      gopass clone "$GOPASS_STORE_REPO"

# ─── Deploy / Update ─────────────────────────────────────────────────────────
deploy-docker:
  extends: .deploy_base
  stage: deploy
  rules:
    - if: '$CI_COMMIT_BRANCH == "main" && $CI_PIPELINE_SOURCE == "push"'
      changes:
        - apps/*.tfvars
  script:
    - |
      ADDED_MODIFIED=$(git diff --name-only --diff-filter=ACM \
        "$CI_COMMIT_BEFORE_SHA" "$CI_COMMIT_SHA" -- 'apps/*.tfvars')

      if [ -z "$ADDED_MODIFIED" ]; then
        echo "No Docker tfvars files added or modified. Nothing to deploy."
        exit 0
      fi

      echo "Files to deploy: $ADDED_MODIFIED"
      FAILED=0

      for TFVARS in $ADDED_MODIFIED; do
        APP=$(basename "$TFVARS" .tfvars)
        echo ""
        echo "══════════════════════════════════════════"
        echo "  Deploying: $APP"
        echo "══════════════════════════════════════════"

        if ! (
          set -e

          # ── Fetch SSH key from gopass ──
          gopass show -o "infra/ssh-keys/$APP" > /tmp/deploy_key
          chmod 600 /tmp/deploy_key

          # ── Fetch app secrets from gopass ──
          DB_PASSWORD=$(gopass show -o "apps/$APP/db_password")
          GIT_TOKEN=$(gopass show -o "apps/$APP/git_token" 2>/dev/null || echo "")

          # ── tofu init with SeaweedFS backend ──
          export AWS_ACCESS_KEY_ID="$SEAWEED_ACCESS_KEY"
          export AWS_SECRET_ACCESS_KEY="$SEAWEED_SECRET_KEY"

          tofu init \
            -backend-config="bucket=tofu-state" \
            -backend-config="key=apps/$APP.tfstate" \
            -backend-config="endpoint=$SEAWEED_S3_ENDPOINT" \
            -backend-config="region=us-east-1" \
            -backend-config="force_path_style=true" \
            -reconfigure

          # ── Workspace ──
          tofu workspace select "$APP" 2>/dev/null || tofu workspace new "$APP"

          # ── Apply ──
          tofu apply -auto-approve \
            -var-file="$TFVARS" \
            -var="ssh_key_path=/tmp/deploy_key" \
            -var="db_password=$DB_PASSWORD" \
            -var="openresty_git_token=$GIT_TOKEN"

          rm -f /tmp/deploy_key
          echo "  Deployed: $APP"
        ); then
          echo "ERROR: Deployment of $APP failed — continuing with remaining apps"
          FAILED=1
          rm -f /tmp/deploy_key
        fi
      done

      if [ $FAILED -ne 0 ]; then
        echo ""
        echo "One or more deployments failed. See logs above for details."
        exit 1
      fi
  after_script:
    # Safety cleanup in case the job was interrupted
    - rm -f /tmp/deploy_key

# ─── Destroy (tfvars file deleted) ───────────────────────────────────────────
destroy-docker:
  extends: .deploy_base
  stage: destroy
  rules:
    - if: '$CI_COMMIT_BRANCH == "main" && $CI_PIPELINE_SOURCE == "push"'
      changes:
        - apps/*.tfvars
  script:
    - |
      DELETED=$(git diff --name-only --diff-filter=D \
        "$CI_COMMIT_BEFORE_SHA" "$CI_COMMIT_SHA" -- 'apps/*.tfvars')

      if [ -z "$DELETED" ]; then
        echo "No Docker tfvars files deleted. Nothing to destroy."
        exit 0
      fi

      echo "Files to destroy: $DELETED"
      FAILED=0

      for TFVARS in $DELETED; do
        APP=$(basename "$TFVARS" .tfvars)
        echo ""
        echo "══════════════════════════════════════════"
        echo "  Destroying: $APP"
        echo "══════════════════════════════════════════"

        if ! (
          set -e

          # ── Recover deleted tfvars from git history ──
          # No need to check out the previous commit — git show reads it directly.
          git show "$CI_COMMIT_BEFORE_SHA:$TFVARS" > /tmp/${APP}.tfvars

          # ── Fetch SSH key from gopass ──
          gopass show -o "infra/ssh-keys/$APP" > /tmp/deploy_key
          chmod 600 /tmp/deploy_key

          # ── Fetch app secrets from gopass ──
          DB_PASSWORD=$(gopass show -o "apps/$APP/db_password")
          GIT_TOKEN=$(gopass show -o "apps/$APP/git_token" 2>/dev/null || echo "")

          # ── tofu init ──
          export AWS_ACCESS_KEY_ID="$SEAWEED_ACCESS_KEY"
          export AWS_SECRET_ACCESS_KEY="$SEAWEED_SECRET_KEY"

          tofu init \
            -backend-config="bucket=tofu-state" \
            -backend-config="key=apps/$APP.tfstate" \
            -backend-config="endpoint=$SEAWEED_S3_ENDPOINT" \
            -backend-config="region=us-east-1" \
            -backend-config="force_path_style=true" \
            -reconfigure

          # ── Select existing workspace ──
          tofu workspace select "$APP"

          # ── Destroy ──
          tofu destroy -auto-approve \
            -var-file="/tmp/${APP}.tfvars" \
            -var="ssh_key_path=/tmp/deploy_key" \
            -var="db_password=$DB_PASSWORD" \
            -var="openresty_git_token=$GIT_TOKEN"

          # ── Remove workspace ──
          tofu workspace select default
          tofu workspace delete "$APP"

          rm -f /tmp/${APP}.tfvars /tmp/deploy_key
          echo "  Destroyed: $APP"
        ); then
          echo "ERROR: Destroy of $APP failed — continuing with remaining apps"
          FAILED=1
          rm -f /tmp/${APP}.tfvars /tmp/deploy_key
        fi
      done

      if [ $FAILED -ne 0 ]; then
        echo ""
        echo "One or more destroy operations failed. See logs above for details."
        exit 1
      fi
  after_script:
    # Safety cleanup in case the job was interrupted
    - rm -f /tmp/deploy_key /tmp/*.tfvars