# Forgejo Deployment
# RFC 0040: Self-Hosted Core Services
# RFC 0049: Service Database Unification - CockroachDB backend
# ADR 0004: Set It and Forget It - auto-scaling via HPA
# ADR 0005: Full-stack self-hosting
#
# Spike 2026-01-19: Forgejo v9 works with CockroachDB after setting
# sql.defaults.serial_normalization = 'sql_sequence' to fix XORM SERIAL handling.
# Requires extended startup probes for initial 230-table migration.
#
# Integrated with Keycloak SSO
apiVersion: apps/v1
kind: Deployment
metadata:
  name: forgejo
  namespace: forgejo
  labels:
    app.kubernetes.io/name: forgejo
    app.kubernetes.io/part-of: core-services
spec:
  replicas: 1  # Single replica due to ReadWriteOnce storage; HA requires EFS or Redis queue
  selector:
    matchLabels:
      app: forgejo
  strategy:
    type: Recreate  # Required for single replica with RWO storage (LevelDB queue lock)
  template:
    metadata:
      labels:
        app: forgejo
        app.kubernetes.io/name: forgejo
      annotations:
        prometheus.io/scrape: "true"
        prometheus.io/port: "3000"
        prometheus.io/path: "/metrics"
    spec:
      serviceAccountName: forgejo
      terminationGracePeriodSeconds: 60

      # Spread pods across AZs for HA
      affinity:
        podAntiAffinity:
          preferredDuringSchedulingIgnoredDuringExecution:
            - weight: 100
              podAffinityTerm:
                labelSelector:
                  matchLabels:
                    app: forgejo
                topologyKey: topology.kubernetes.io/zone

      # Forgejo needs elevated permissions for initial setup (chown, su-exec)
      # After initial setup, consider using a custom image with pre-set permissions
      securityContext:
        fsGroup: 1000
        runAsUser: 0

      initContainers:
        # Wait for CockroachDB to be ready
        - name: wait-for-db
          image: postgres:16-alpine
          command:
            - /bin/sh
            - -c
            - |
              until pg_isready -h cockroachdb-public.cockroachdb.svc.cluster.local -p 26257; do
                echo "Waiting for CockroachDB..."
                sleep 5
              done
              echo "CockroachDB is ready!"
        # Fix ssh directory permissions for git user
        - name: fix-permissions
          image: alpine:3.19
          command:
            - /bin/sh
            - -c
            - |
              # Ensure ssh directory exists with correct permissions
              mkdir -p /data/git/.ssh
              chown -R 1000:1000 /data/git
              chmod 770 /data/git/.ssh
              echo "Permissions fixed"
          volumeMounts:
            - name: data
              mountPath: /data

      containers:
        - name: forgejo
          image: codeberg.org/forgejo/forgejo:9
          imagePullPolicy: IfNotPresent

          env:
            # Database configuration (CockroachDB)
            - name: FORGEJO__database__DB_TYPE
              value: "postgres"
            - name: FORGEJO__database__HOST
              value: "cockroachdb-public.cockroachdb.svc.cluster.local:26257"
            - name: FORGEJO__database__NAME
              valueFrom:
                secretKeyRef:
                  name: forgejo-cockroachdb
                  key: database
            - name: FORGEJO__database__USER
              valueFrom:
                secretKeyRef:
                  name: forgejo-cockroachdb
                  key: username
            - name: FORGEJO__database__PASSWD
              valueFrom:
                secretKeyRef:
                  name: forgejo-cockroachdb
                  key: password
            - name: FORGEJO__database__SSL_MODE
              value: "require"
            - name: FORGEJO__database__CHARSET
              value: "utf8"

            # Server configuration
            - name: FORGEJO__server__DOMAIN
              value: "git.beyondtheuniverse.superviber.com"
            - name: FORGEJO__server__ROOT_URL
              value: "https://git.beyondtheuniverse.superviber.com"
            - name: FORGEJO__server__SSH_DOMAIN
              value: "git.beyondtheuniverse.superviber.com"
            - name: FORGEJO__server__SSH_PORT
              value: "22"
            - name: FORGEJO__server__LFS_START_SERVER
              value: "true"
            - name: FORGEJO__server__OFFLINE_MODE
              value: "false"

            # Security settings
            - name: FORGEJO__security__INSTALL_LOCK
              value: "true"
            - name: FORGEJO__security__SECRET_KEY
              valueFrom:
                secretKeyRef:
                  name: forgejo-secrets
                  key: secret-key
            - name: FORGEJO__security__INTERNAL_TOKEN
              valueFrom:
                secretKeyRef:
                  name: forgejo-secrets
                  key: internal-token

            # OAuth2 configuration (Keycloak SSO)
            - name: FORGEJO__oauth2__ENABLED
              value: "true"
            - name: FORGEJO__oauth2__JWT_SECRET
              valueFrom:
                secretKeyRef:
                  name: forgejo-oauth
                  key: jwt-secret

            # Session configuration (for HA)
            - name: FORGEJO__session__PROVIDER
              value: "db"
            - name: FORGEJO__session__PROVIDER_CONFIG
              value: ""

            # Cache configuration
            - name: FORGEJO__cache__ENABLED
              value: "true"
            - name: FORGEJO__cache__ADAPTER
              value: "memory"

            # Queue configuration
            - name: FORGEJO__queue__TYPE
              value: "level"
            - name: FORGEJO__queue__DATADIR
              value: "/data/queues"

            # Repository settings
            - name: FORGEJO__repository__ROOT
              value: "/data/git/repositories"
            - name: FORGEJO__repository__DEFAULT_BRANCH
              value: "main"

            # LFS settings
            - name: FORGEJO__lfs__PATH
              value: "/data/lfs"

            # Logging
            - name: FORGEJO__log__MODE
              value: "console"
            - name: FORGEJO__log__LEVEL
              value: "Info"

            # Metrics
            - name: FORGEJO__metrics__ENABLED
              value: "true"
            - name: FORGEJO__metrics__TOKEN
              valueFrom:
                secretKeyRef:
                  name: forgejo-secrets
                  key: metrics-token

            # Service settings
            - name: FORGEJO__service__DISABLE_REGISTRATION
              value: "true"
            - name: FORGEJO__service__REQUIRE_SIGNIN_VIEW
              value: "false"

          ports:
            - name: http
              containerPort: 3000
              protocol: TCP
            - name: ssh
              containerPort: 22
              protocol: TCP

          resources:
            requests:
              cpu: 200m
              memory: 256Mi
            limits:
              cpu: 1000m
              memory: 1Gi

          # Forgejo needs CHOWN, SETGID, SETUID capabilities for initial setup
          securityContext:
            capabilities:
              add:
                - CHOWN
                - SETGID
                - SETUID
                - FOWNER

          volumeMounts:
            - name: data
              mountPath: /data

          # Health probes - extended for CockroachDB migration time
          startupProbe:
            httpGet:
              path: /api/healthz
              port: 3000
            initialDelaySeconds: 10
            periodSeconds: 10
            timeoutSeconds: 5
            failureThreshold: 60  # Allow up to 10 minutes for initial migration

          readinessProbe:
            httpGet:
              path: /api/healthz
              port: 3000
            initialDelaySeconds: 5
            periodSeconds: 10
            timeoutSeconds: 5
            failureThreshold: 3

          livenessProbe:
            httpGet:
              path: /api/healthz
              port: 3000
            initialDelaySeconds: 10
            periodSeconds: 30
            timeoutSeconds: 10
            failureThreshold: 3

      volumes:
        - name: data
          persistentVolumeClaim:
            claimName: forgejo-data