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

PROG="init_gitea"
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# shellcheck disable=SC1090
source "$SCRIPT_DIR/knoe_cfg.sh"

MODE="$(knoe_normalize_mode "${KNOE_MODE:-${DEPLOYMENT_MODE:-k3d}}")"
NAMESPACE="${GITEA_NAMESPACE:-}"
CFG_PATH=""
FORCE=0

usage() {
  cat <<EOF
Usage:
  $PROG [options] [deploy]

Options:
  --mode <k3d|k3s|k8s|local>   Deployment mode (default: ${MODE:-k3d})
  -n, --namespace <name>       Target namespace (default: gitea)
  -c, --config <knoe.cfg>     Path to knoe.cfg (defaults to detected)
  --force                      Delete existing release before deploy
  --help                       Show this help

Behavior:
  - Prefers Helm install/upgrade (gitea-charts/gitea).
  - Falls back to applying a generated Deployment/Service/Ingress manifest.
  - If a local registry is enabled, the image is mirrored there first.
EOF
}

die() { echo "[ERROR] $*" >&2; exit 2; }
log() { echo "[INFO] $*"; }
warn() { echo "[WARN] $*" >&2; }

while [[ $# -gt 0 ]]; do
  case "$1" in
    --mode) MODE="$(knoe_normalize_mode "${2:-}")"; shift 2 ;;
    --mode=*) MODE="$(knoe_normalize_mode "${1#*=}")"; shift 1 ;;
    -n|--namespace) NAMESPACE="${2:-}"; shift 2 ;;
    --namespace=*) NAMESPACE="${1#*=}"; shift 1 ;;
    -c|--config) CFG_PATH="${2:-}"; shift 2 ;;
    --config=*) CFG_PATH="${1#*=}"; shift 1 ;;
    --force) FORCE=1; shift ;;
    -h|--help) usage; exit 0 ;;
    *) break ;;
  esac
done

# Resolve config path and namespace defaults from knoe.cfg when present
if [[ -z "$CFG_PATH" && -n "${KNOE_CONF:-}" && -f "${KNOE_CONF}/knoe.cfg" ]]; then
  CFG_PATH="${KNOE_CONF}/knoe.cfg"
elif [[ -z "$CFG_PATH" && -f "$SCRIPT_DIR/../conf/knoe.cfg" ]]; then
  CFG_PATH="$SCRIPT_DIR/../conf/knoe.cfg"
fi

if [[ -z "$NAMESPACE" && -n "$CFG_PATH" ]]; then
  maybe_ns="$(_knoe_cfg_extract_key "$CFG_PATH" "GITOPS_NAMESPACE")"
  [[ -z "$maybe_ns" ]] && maybe_ns="$(_knoe_cfg_extract_key "$CFG_PATH" "GITEA_NAMESPACE")"
  NAMESPACE="$maybe_ns"
fi
NAMESPACE="${NAMESPACE:-gitea}"
export GITEA_NAMESPACE="$NAMESPACE"

case "$MODE" in
  k3d|k3s|k8s|local) ;;
  *) die "Unsupported mode '$MODE' (use k3d, k3s, k8s, or local)" ;;
esac
export KNOE_MODE="$MODE"

command -v kubectl >/dev/null || die "kubectl not found"
command -v helm >/dev/null || warn "helm not found — will use manifest fallback"

kubectl get ns "$NAMESPACE" >/dev/null 2>&1 || kubectl create namespace "$NAMESPACE" >/dev/null 2>&1

CHART_REPO="https://dl.gitea.com/charts"
CHART_NAME="gitea-charts/gitea"
RELEASE_NAME="gitea"
IMAGE_REPO_DEFAULT="gitea/gitea"
IMAGE_TAG="${GITEA_IMAGE_TAG:-1.22.3}"
IMAGE_REPO="$IMAGE_REPO_DEFAULT"

# Optional reset
if [[ "$FORCE" -eq 1 ]]; then
  warn "--force specified; removing existing Gitea resources in namespace $NAMESPACE"
  if command -v helm >/dev/null 2>&1; then
    helm uninstall "$RELEASE_NAME" -n "$NAMESPACE" >/dev/null 2>&1 || true
  fi
  kubectl -n "$NAMESPACE" delete deploy/gitea svc/gitea-http svc/gitea-ssh ingress/gitea >/dev/null 2>&1 || true
fi

# Mirror to local registry if enabled
if _knoe_local_registry_enabled && command -v docker >/dev/null; then
  HOST_REG="${LOCAL_REGISTRY:-${PROLE_LOCAL_REGISTRY:-}}"
  INTERNAL_REG="${LOCAL_REGISTRY_INTERNAL:-${PROLE_LOCAL_REGISTRY_INTERNAL:-}}"
  if [[ -n "$HOST_REG" ]]; then
    HOST_IMG="${HOST_REG}/${IMAGE_REPO_DEFAULT}"
    log "Pulling ${IMAGE_REPO_DEFAULT}:${IMAGE_TAG}"
    docker pull "${IMAGE_REPO_DEFAULT}:${IMAGE_TAG}" >/dev/null
    log "Tagging ${HOST_IMG}:${IMAGE_TAG}"
    docker tag "${IMAGE_REPO_DEFAULT}:${IMAGE_TAG}" "${HOST_IMG}:${IMAGE_TAG}"
    log "Pushing ${HOST_IMG}:${IMAGE_TAG}"
    docker push "${HOST_IMG}:${IMAGE_TAG}" >/dev/null || warn "Push to local registry failed; continuing with upstream image"
    if [[ -n "$INTERNAL_REG" ]]; then
      IMAGE_REPO="${INTERNAL_REG}/gitea/gitea"
    else
      IMAGE_REPO="${HOST_REG}/gitea/gitea"
    fi
  fi
fi

deploy_with_helm() {
  command -v helm >/dev/null 2>&1 || return 1

  helm repo add gitea-charts "$CHART_REPO" >/dev/null 2>&1 || true
  helm repo update >/dev/null 2>&1 || true

  # Minimal config: NodePort or ClusterIP + Ingress depending on environment.
  # Avoid heavy persistence defaults; users can override via values later.
  helm upgrade --install "$RELEASE_NAME" "$CHART_NAME" \
    -n "$NAMESPACE" \
    --set image.repository="$IMAGE_REPO" \
    --set image.tag="$IMAGE_TAG" \
    --set service.http.type=ClusterIP \
    --set service.ssh.type=ClusterIP \
    --set gitea.admin.username="${GITEA_ADMIN_USER:-gitea_admin}" \
    --set gitea.admin.password="${GITEA_ADMIN_PASSWORD:-gitea_admin}" \
    --set gitea.admin.email="${GITEA_ADMIN_EMAIL:-gitea_admin@example.local}" \
    --wait --timeout 10m
}

apply_manifest_fallback() {
  warn "Helm unavailable; applying fallback manifest"
  cat <<EOF | kubectl apply -n "$NAMESPACE" -f -
apiVersion: apps/v1
kind: Deployment
metadata:
  name: gitea
spec:
  replicas: 1
  selector:
    matchLabels:
      app: gitea
  template:
    metadata:
      labels:
        app: gitea
    spec:
      containers:
        - name: gitea
          image: ${IMAGE_REPO}:${IMAGE_TAG}
          ports:
            - name: http
              containerPort: 3000
            - name: ssh
              containerPort: 2222
          env:
            - name: GITEA__server__ROOT_URL
              value: "http://gitea.${NAMESPACE}.svc.cluster.local:3000"
---
apiVersion: v1
kind: Service
metadata:
  name: gitea-http
spec:
  selector:
    app: gitea
  ports:
    - name: http
      port: 3000
      targetPort: 3000
---
apiVersion: v1
kind: Service
metadata:
  name: gitea-ssh
spec:
  selector:
    app: gitea
  ports:
    - name: ssh
      port: 2222
      targetPort: 2222
EOF
}

ACTION="${1:-deploy}"
case "$ACTION" in
  deploy|"") ;;
  *) usage; die "Unknown action '$ACTION'" ;;
esac

log "Deploying Gitea to namespace '$NAMESPACE' (mode=$MODE)"
if deploy_with_helm; then
  log "Gitea deployed via Helm"
else
  apply_manifest_fallback
  log "Gitea deployed via manifest fallback"
fi

log "Waiting for deployment rollout..."
kubectl -n "$NAMESPACE" rollout status deploy/gitea --timeout=10m

log "Done. Service endpoints:"
kubectl -n "$NAMESPACE" get svc gitea-http gitea-ssh