import { ChangeEvent, ReactNode } from 'react';
import { Plus, RefreshCw, Trash2 } from 'react-feather';

import { Link } from '@@/Link';
import { Icon } from '@@/Icon';
import { Select, Option } from '@@/form-components/Input/Select';
import { FormError } from '@@/form-components/FormError';
import { Widget, WidgetBody, WidgetTitle } from '@@/Widget';
import { Tooltip } from '@@/Tip/Tooltip';
import { Button } from '@@/buttons';

import { Annotations } from './Annotations';
import { Rule, ServicePorts } from './types';

import '../style.css';

const PathTypes: Record<string, string[]> = {
  nginx: ['ImplementationSpecific', 'Prefix', 'Exact'],
  traefik: ['Prefix', 'Exact'],
  other: ['Prefix', 'Exact'],
};
const PlaceholderAnnotations: Record<string, string[]> = {
  nginx: ['e.g. nginx.ingress.kubernetes.io/rewrite-target', '/$1'],
  traefik: ['e.g. traefik.ingress.kubernetes.io/router.tls', 'true'],
  other: ['e.g. app.kubernetes.io/name', 'examplename'],
};

interface Props {
  environmentID: number;
  rule: Rule;

  errors: Record<string, ReactNode>;
  isLoading: boolean;
  isEdit: boolean;
  namespace: string;

  servicePorts: ServicePorts;
  ingressClassOptions: Option<string>[];
  serviceOptions: Option<string>[];
  tlsOptions: Option<string>[];
  namespacesOptions: Option<string>[];

  removeIngressRoute: (hostIndex: number, pathIndex: number) => void;
  removeIngressHost: (hostIndex: number) => void;
  removeAnnotation: (index: number) => void;

  addNewIngressHost: (noHost?: boolean) => void;
  addNewIngressRoute: (hostIndex: number) => void;
  addNewAnnotation: (type?: 'rewrite' | 'regex' | 'ingressClass') => void;

  handleNamespaceChange: (val: string) => void;
  handleHostChange: (hostIndex: number, val: string) => void;
  handleTLSChange: (hostIndex: number, tls: string) => void;
  handleIngressChange: (
    key: 'IngressName' | 'IngressClassName',
    value: string
  ) => void;
  handleAnnotationChange: (
    index: number,
    key: 'Key' | 'Value',
    val: string
  ) => void;
  handlePathChange: (
    hostIndex: number,
    pathIndex: number,
    key: 'Route' | 'PathType' | 'ServiceName' | 'ServicePort',
    val: string
  ) => void;

  reloadTLSCerts: () => void;
}

export function IngressForm({
  environmentID,
  rule,
  isLoading,
  isEdit,
  servicePorts,
  tlsOptions,
  handleTLSChange,
  addNewIngressHost,
  serviceOptions,
  handleHostChange,
  handleIngressChange,
  handlePathChange,
  addNewIngressRoute,
  removeIngressRoute,
  removeIngressHost,
  addNewAnnotation,
  removeAnnotation,
  reloadTLSCerts,
  handleAnnotationChange,
  ingressClassOptions,
  errors,
  namespacesOptions,
  handleNamespaceChange,
  namespace,
}: Props) {
  if (isLoading) {
    return <div>Loading...</div>;
  }
  const hasNoHostRule = rule.Hosts?.some((host) => host.NoHost);
  const placeholderAnnotation =
    PlaceholderAnnotations[rule.IngressType || 'other'] ||
    PlaceholderAnnotations.other;
  const pathTypes = PathTypes[rule.IngressType || 'other'] || PathTypes.other;

  return (
    <Widget>
      <WidgetTitle icon="svg-route" title="Ingress" />
      <WidgetBody key={rule.Key + rule.Namespace}>
        <div className="row">
          <div className="form-horizontal">
            <div className="form-group">
              <label
                className="control-label text-muted col-sm-3 col-lg-2 required"
                htmlFor="namespace"
              >
                Namespace
              </label>
              <div className="col-sm-4">
                {isEdit ? (
                  namespace
                ) : (
                  <Select
                    name="namespaces"
                    options={namespacesOptions || []}
                    onChange={(e) => handleNamespaceChange(e.target.value)}
                    defaultValue={namespace}
                    disabled={isEdit}
                  />
                )}
              </div>
            </div>
          </div>
        </div>

        {namespace && (
          <div className="row">
            <div className="form-horizontal">
              <div className="form-group">
                <label
                  className="control-label text-muted col-sm-3 col-lg-2 required"
                  htmlFor="ingress_name"
                >
                  Ingress name
                </label>
                <div className="col-sm-4">
                  {isEdit ? (
                    rule.IngressName
                  ) : (
                    <input
                      name="ingress_name"
                      type="text"
                      className="form-control"
                      placeholder="Ingress name"
                      defaultValue={rule.IngressName}
                      onChange={(e: ChangeEvent<HTMLInputElement>) =>
                        handleIngressChange('IngressName', e.target.value)
                      }
                      disabled={isEdit}
                    />
                  )}
                  {errors.ingressName && !isEdit && (
                    <FormError className="mt-1 error-inline">
                      {errors.ingressName}
                    </FormError>
                  )}
                </div>
              </div>

              <div className="form-group" key={ingressClassOptions.toString()}>
                <label
                  className="control-label text-muted col-sm-3 col-lg-2 required"
                  htmlFor="ingress_class"
                >
                  Ingress class
                </label>
                <div className="col-sm-4">
                  <Select
                    name="ingress_class"
                    className="form-control"
                    placeholder="Ingress name"
                    defaultValue={rule.IngressClassName}
                    onChange={(e: ChangeEvent<HTMLSelectElement>) =>
                      handleIngressChange('IngressClassName', e.target.value)
                    }
                    options={ingressClassOptions}
                  />
                  {errors.className && (
                    <FormError className="mt-1 error-inline">
                      {errors.className}
                    </FormError>
                  )}
                </div>
              </div>
            </div>

            <div className="col-sm-12 px-0 text-muted !mb-0">
              <div className="mb-2">Annotations</div>
              <p className="vertical-center text-muted small">
                <Icon icon="info" mode="primary" feather />
                <span>
                  You can specify{' '}
                  <a
                    href="https://kubernetes.io/docs/concepts/overview/working-with-objects/annotations/"
                    target="_black"
                  >
                    annotations
                  </a>{' '}
                  for the object. See further Kubernetes documentation on{' '}
                  <a
                    href="https://kubernetes.io/docs/reference/labels-annotations-taints/"
                    target="_black"
                  >
                    well-known annotations
                  </a>
                  .
                </span>
              </p>
            </div>

            {rule?.Annotations && (
              <Annotations
                placeholder={placeholderAnnotation}
                annotations={rule.Annotations}
                handleAnnotationChange={handleAnnotationChange}
                removeAnnotation={removeAnnotation}
                errors={errors}
              />
            )}

            <div className="col-sm-12 p-0 anntation-actions">
              <Button
                className="btn btn-sm btn-light mb-2 !ml-0"
                onClick={() => addNewAnnotation()}
                icon={Plus}
                title="Use annotations to configure options for an ingress. Review Nginx or Traefik documentation to find the annotations supported by your choice of ingress type."
              >
                {' '}
                add annotation
              </Button>

              {rule.IngressType === 'nginx' && (
                <>
                  <Button
                    className="btn btn-sm btn-light mb-2 ml-2"
                    onClick={() => addNewAnnotation('rewrite')}
                    icon={Plus}
                    title="When the exposed URLs for your applications differ from the specified paths in the ingress, use the rewrite target annotation to denote the path to redirect to."
                    data-cy="add-rewrite-annotation"
                  >
                    {' '}
                    Add rewrite annotation
                  </Button>

                  <Button
                    className="btn btn-sm btn-light mb-2 ml-2"
                    onClick={() => addNewAnnotation('regex')}
                    icon={Plus}
                    title="When the exposed URLs for your applications differ from the specified paths in the ingress, use the rewrite target annotation to denote the path to redirect to."
                    data-cy="add-regex-annotation"
                  >
                    Add regular expression annotation
                  </Button>
                </>
              )}

              {rule.IngressType === 'custom' && (
                <Button
                  className="btn btn-sm btn-light mb-2 ml-2"
                  onClick={() => addNewAnnotation('ingressClass')}
                  icon={Plus}
                  data-cy="add-ingress-class-annotation"
                >
                  Add kubernetes.io/ingress.class annotation
                </Button>
              )}
            </div>

            <div className="col-sm-12 px-0 text-muted">Rules</div>
          </div>
        )}

        {namespace &&
          rule?.Hosts?.map((host, hostIndex) => (
            <div className="row mb-5 rule bordered" key={host.Key}>
              <div className="col-sm-12">
                <div className="row mt-5 rule-actions">
                  <div className="col-sm-3 p-0">
                    {!host.NoHost ? 'Rule' : 'Fallback rule'}
                  </div>
                  <div className="col-sm-9 p-0 text-right">
                    {!host.NoHost && (
                      <Button
                        className="btn btn-light btn-sm"
                        onClick={() => reloadTLSCerts()}
                        icon={RefreshCw}
                      >
                        Reload TLS secrets
                      </Button>
                    )}

                    <Button
                      className="btn btn-sm ml-2"
                      color="dangerlight"
                      type="button"
                      data-cy={`k8sAppCreate-rmHostButton_${hostIndex}`}
                      onClick={() => removeIngressHost(hostIndex)}
                      disabled={rule.Hosts.length === 1}
                      icon={Trash2}
                    >
                      Remove rule
                    </Button>
                  </div>
                </div>
                {!host.NoHost && (
                  <div className="row">
                    <div className="form-group !pl-0 col-sm-6 col-lg-4 !pr-2">
                      <div className="input-group input-group-sm">
                        <span className="input-group-addon required">
                          Hostname
                        </span>
                        <input
                          name={`ingress_host_${hostIndex}`}
                          type="text"
                          className="form-control form-control-sm"
                          placeholder="e.g. example.com"
                          defaultValue={host.Host}
                          onChange={(e: ChangeEvent<HTMLInputElement>) =>
                            handleHostChange(hostIndex, e.target.value)
                          }
                        />
                      </div>
                      {errors[`hosts[${hostIndex}].host`] && (
                        <FormError className="mt-1 !mb-0">
                          {errors[`hosts[${hostIndex}].host`]}
                        </FormError>
                      )}
                    </div>

                    <div className="form-group !pr-0 col-sm-6 col-lg-4 !pl-2">
                      <div className="input-group input-group-sm">
                        <span className="input-group-addon">TLS secret</span>
                        <Select
                          key={tlsOptions.toString() + host.Secret}
                          name={`ingress_tls_${hostIndex}`}
                          options={tlsOptions}
                          onChange={(e: ChangeEvent<HTMLSelectElement>) =>
                            handleTLSChange(hostIndex, e.target.value)
                          }
                          defaultValue={host.Secret}
                        />
                      </div>
                    </div>

                    <p className="vertical-center text-muted small whitespace-nowrap col-sm-12 !p-0">
                      <Icon icon="info" mode="primary" size="md" feather />
                      <span>
                        Add a secret via{' '}
                        <Link
                          to="kubernetes.configurations"
                          params={{ id: environmentID }}
                          className="text-primary"
                          target="_blank"
                        >
                          ConfigMaps &amp; Secrets
                        </Link>
                        {', '}
                        then select &apos;Reload TLS secrets&apos; above to
                        populate the dropdown with your changes.
                      </span>
                    </p>
                  </div>
                )}
                {host.NoHost && (
                  <p className="vertical-center text-muted small whitespace-nowrap col-sm-12 !p-0">
                    <Icon icon="info" mode="primary" size="md" feather />A
                    fallback rule has no host specified. This rule only applies
                    when an inbound request has a hostname that does not match
                    with any of your other rules.
                  </p>
                )}

                <div className="row">
                  <div className="col-sm-12 px-0 !mb-0 mt-2 text-muted">
                    Paths
                  </div>
                </div>
                {host.Paths.map((path, pathIndex) => (
                  <div
                    className="mt-5 !mb-5 row path"
                    key={`path_${path.Key}}`}
                  >
                    <div className="form-group !pl-0 col-sm-3 col-xl-2 !m-0">
                      <div className="input-group input-group-sm">
                        <span className="input-group-addon required">
                          Service
                        </span>
                        <Select
                          key={serviceOptions.toString() + path.ServiceName}
                          name={`ingress_service_${hostIndex}_${pathIndex}`}
                          options={serviceOptions}
                          onChange={(e: ChangeEvent<HTMLSelectElement>) =>
                            handlePathChange(
                              hostIndex,
                              pathIndex,
                              'ServiceName',
                              e.target.value
                            )
                          }
                          defaultValue={path.ServiceName}
                        />
                      </div>
                      {errors[
                        `hosts[${hostIndex}].paths[${pathIndex}].servicename`
                      ] && (
                        <FormError className="mt-1 !mb-0 error-inline">
                          {
                            errors[
                              `hosts[${hostIndex}].paths[${pathIndex}].servicename`
                            ]
                          }
                        </FormError>
                      )}
                    </div>

                    <div className="form-group !pl-0 col-sm-2 col-xl-2 !m-0">
                      {servicePorts && (
                        <>
                          <div className="input-group input-group-sm">
                            <span className="input-group-addon required">
                              Service port
                            </span>
                            <Select
                              key={servicePorts.toString() + path.ServicePort}
                              name={`ingress_servicePort_${hostIndex}_${pathIndex}`}
                              options={
                                path.ServiceName &&
                                servicePorts[path.ServiceName]
                                  ? servicePorts[path.ServiceName]
                                  : [
                                      {
                                        label: 'Select port',
                                        value: '',
                                      },
                                    ]
                              }
                              onChange={(e: ChangeEvent<HTMLSelectElement>) =>
                                handlePathChange(
                                  hostIndex,
                                  pathIndex,
                                  'ServicePort',
                                  e.target.value
                                )
                              }
                              defaultValue={path.ServicePort}
                            />
                          </div>
                          {errors[
                            `hosts[${hostIndex}].paths[${pathIndex}].serviceport`
                          ] && (
                            <FormError className="mt-1 !mb-0">
                              {
                                errors[
                                  `hosts[${hostIndex}].paths[${pathIndex}].serviceport`
                                ]
                              }
                            </FormError>
                          )}
                        </>
                      )}
                    </div>

                    <div className="form-group !pl-0 col-sm-3 col-xl-2 !m-0">
                      <div className="input-group input-group-sm">
                        <span className="input-group-addon required">
                          Path type
                        </span>
                        <Select
                          key={servicePorts.toString() + path.PathType}
                          name={`ingress_pathType_${hostIndex}_${pathIndex}`}
                          options={
                            pathTypes
                              ? pathTypes.map((type) => ({
                                  label: type,
                                  value: type,
                                }))
                              : []
                          }
                          onChange={(e: ChangeEvent<HTMLSelectElement>) =>
                            handlePathChange(
                              hostIndex,
                              pathIndex,
                              'PathType',
                              e.target.value
                            )
                          }
                          defaultValue={path.PathType}
                        />
                      </div>
                      {errors[
                        `hosts[${hostIndex}].paths[${pathIndex}].pathType`
                      ] && (
                        <FormError className="mt-1 !mb-0">
                          {
                            errors[
                              `hosts[${hostIndex}].paths[${pathIndex}].pathType`
                            ]
                          }
                        </FormError>
                      )}
                    </div>

                    <div className="form-group !pl-0 col-sm-3 col-xl-3 !m-0">
                      <div className="input-group input-group-sm">
                        <span className="input-group-addon required">Path</span>
                        <input
                          className="form-control"
                          name={`ingress_route_${hostIndex}-${pathIndex}`}
                          placeholder="/example"
                          data-pattern="/^(\/?[a-zA-Z0-9]+([a-zA-Z0-9-/_]*[a-zA-Z0-9])?|[a-zA-Z0-9]+)|(\/){1}$/"
                          data-cy={`k8sAppCreate-route_${hostIndex}-${pathIndex}`}
                          defaultValue={path.Route}
                          onChange={(e: ChangeEvent<HTMLInputElement>) =>
                            handlePathChange(
                              hostIndex,
                              pathIndex,
                              'Route',
                              e.target.value
                            )
                          }
                        />
                      </div>
                      {errors[
                        `hosts[${hostIndex}].paths[${pathIndex}].path`
                      ] && (
                        <FormError className="mt-1 !mb-0">
                          {
                            errors[
                              `hosts[${hostIndex}].paths[${pathIndex}].path`
                            ]
                          }
                        </FormError>
                      )}
                    </div>

                    <div className="form-group !pl-0 col-sm-1 !m-0">
                      <Button
                        className="btn btn-sm btn-only-icon !ml-0 vertical-center"
                        color="dangerlight"
                        type="button"
                        data-cy={`k8sAppCreate-rmPortButton_${hostIndex}-${pathIndex}`}
                        onClick={() => removeIngressRoute(hostIndex, pathIndex)}
                        disabled={host.Paths.length === 1}
                        icon={Trash2}
                      />
                    </div>
                  </div>
                ))}

                <div className="row mt-5">
                  <Button
                    className="btn btn-sm btn-light !ml-0"
                    type="button"
                    onClick={() => addNewIngressRoute(hostIndex)}
                    icon={Plus}
                  >
                    Add path
                  </Button>
                </div>
              </div>
            </div>
          ))}

        {namespace && (
          <div className="row p-0 rules-action">
            <div className="col-sm-12 p-0 vertical-center">
              <Button
                className="btn btn-sm btn-light !ml-0"
                type="button"
                onClick={() => addNewIngressHost()}
                icon={Plus}
              >
                Add new host
              </Button>

              <Button
                className="btn btn-sm btn-light ml-2"
                type="button"
                onClick={() => addNewIngressHost(true)}
                disabled={hasNoHostRule}
                icon={Plus}
              >
                Add fallback rule
              </Button>
              <Tooltip message="A fallback rule will be applied to all requests that do not match any of the defined hosts." />
            </div>
          </div>
        )}
      </WidgetBody>
    </Widget>
  );
}