resource "kubernetes_namespace" "gitea" {
  metadata {
    annotations = {
      name = "gitea"
    }

    labels = {
      name = "gitea"
    }

    name = "gitea"
  }
}

resource "kubernetes_secret" "gitea_mail_credentials" {
  metadata {
    name      = "gitea-mail-credentials"
    namespace = kubernetes_namespace.gitea.metadata[0].name
  }
  data = {
    username = var.smtp_username
    password = var.smtp_password
  }
  type = "Opaque"
}

resource "kubernetes_service_account" "gitea_service_account" {

  metadata {
    name      = "gitea-app-sa"
    namespace = kubernetes_namespace.gitea.metadata[0].name
  }

  automount_service_account_token = false
}

resource "kubernetes_service" "gitea_http" {
  metadata {
    name      = "http"
    namespace = kubernetes_namespace.gitea.metadata[0].name
  }
  spec {
    port {
      port        = 80
      target_port = "http"
    }
    selector = {
      app = "gitea"
    }
    cluster_ip = "None"
  }
}

resource "kubernetes_ingress_v1" "gitea_ingress" {
  metadata {
    name      = "gitea-ingress"
    namespace = kubernetes_namespace.gitea.metadata[0].name

    annotations = {
      "kubernetes.io/ingress.class"                         = "public"
      "cert-manager.io/cluster-issuer"                      = "letsencrypt-prod"
      "nginx.ingress.kubernetes.io/ssl-redirect"            = "true"
      "nginx.ingress.kubernetes.io/proxy-body-size"         = "8m"
      "nginx.ingress.kubernetes.io/proxy-request-buffering" = "on"
      "nginx.ingress.kubernetes.io/proxy-buffer-size"       = "32k"
      "nginx.ingress.kubernetes.io/proxy-buffers-number"    = "16"
    }
  }
  spec {
    tls {
      hosts       = [var.fqdn]
      secret_name = "gitea-tls"
    }
    rule {
      host = var.fqdn
      http {
        path {
          backend {
            service {
              name = "http"
              port {
                number = 80
              }
            }
          }
        }
      }
    }
  }
}

resource "kubernetes_deployment" "gitea" {

  depends_on = [module.gitea_database]

  metadata {
    name      = "gitea-app"
    namespace = kubernetes_namespace.gitea.metadata[0].name
  }
  spec {
    selector {
      match_labels = {
        app = "gitea"
      }
    }
    strategy {
      type = "Recreate"
    }
    template {
      metadata {
        labels = {
          app = "gitea"
        }
      }
      spec {
        service_account_name = kubernetes_service_account.gitea_service_account.metadata[0].name
        container {
          name              = "gitea"
          image             = "gitea/gitea:${var.tag}"
          image_pull_policy = "Always"

          resources {
            requests = {
              memory = "100Mi"
            }
            limits = {
              memory = "300Mi"
            }
          }

          liveness_probe {
            http_get {
              path = "/api/healthz"
              port = "http"
            }
            initial_delay_seconds = 200
            period_seconds        = 300
            success_threshold     = 1
            failure_threshold     = 5
          }

          readiness_probe {
            tcp_socket {
              port = "http"
            }
            initial_delay_seconds = 5
            period_seconds        = 10
            success_threshold     = 1
            failure_threshold     = 3
          }

          dynamic "env" {
            for_each = local.gitea_env_vars
            content {
              name  = env.key
              value = env.value
            }
          }
          security_context {
            allow_privilege_escalation = false
          }

          dynamic "env" {
            for_each = local.gitea_secrets
            content {
              name = env.key
              value_from {
                secret_key_ref {
                  key  = env.value.key
                  name = env.value.name
                }
              }
            }
          }

          port {
            container_port = 3000
            name           = "http"
          }
          port {
            container_port = 22
            name           = "ssh"
          }

          volume_mount {
            mount_path = "/data"
            name       = "persistent-storage"
          }
        }
        volume {
          name = "persistent-storage"
          host_path {
            path = local.gitea_path
          }
        }
      }
    }
  }
}

resource "kubernetes_role" "gitea_ssh_access" {
  metadata {
    name      = "gitea-ssh-access"
    namespace = kubernetes_namespace.gitea.metadata[0].name
  }
  rule {
    api_groups = [""]
    resources  = ["pods", "pods/log"]
    verbs      = ["get", "list"]
  }
  rule {
    api_groups = [""]
    resources  = ["pods/exec"]
    verbs      = ["create"]
  }
}

resource "kubernetes_role_binding" "gitea_ssh_access" {
  metadata {
    name      = "gitea-ssh-access"
    namespace = kubernetes_namespace.gitea.metadata[0].name
  }
  role_ref {
    api_group = "rbac.authorization.k8s.io"
    kind      = "Role"
    name      = kubernetes_role.gitea_ssh_access.metadata[0].name
  }
  subject {
    kind      = "ServiceAccount"
    name      = kubernetes_service_account.gitea_service_account.metadata[0].name
    namespace = kubernetes_namespace.gitea.metadata[0].name
  }
}

resource "kubernetes_secret" "gitea_access_token" {
  metadata {
    annotations = {
      "kubernetes.io/service-account.name" = kubernetes_service_account.gitea_service_account.metadata[0].name
    }
    name      = "git-token"
    namespace = kubernetes_namespace.gitea.metadata[0].name
  }

  type                           = "kubernetes.io/service-account-token"
  wait_for_service_account_token = true
}