import { zodResolver } from "@hookform/resolvers/zod";
import { catalogApi, catalogKeys, inventoryApi, inventoryKeys } from "@metis/resources/client";
import type { CatalogItemDTO, ResourceDTO } from "@metis/resources/common";
import { Button } from "@repo/shadcn-ui/components/button";
import { ContextHelp } from "@repo/shadcn-ui/components/context-help";
import { FormActions } from "@repo/shadcn-ui/components/form-dialog";
import { Input } from "@repo/shadcn-ui/components/input";
import { Label } from "@repo/shadcn-ui/components/label";
import { SelectWithAction } from "@repo/shadcn-ui/components/select-with-action";
import { Textarea } from "@repo/shadcn-ui/components/textarea";
import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
import { useEffect, useId, useRef, useState } from "react";
import { useForm } from "react-hook-form";
import { useTranslation } from "react-i18next";

import type { CompanyDTO, WorkProfileDTO } from "../../common";
import {
  CERTIFICATE_STATE_TRANSITIONS,
  type CertificateConfigurationDTO,
  type CertificateConfigurationInput,
  CertificateConfigurationInputSchema,
} from "../../common/certificate-configurations";
import { profileApi, profileKeys } from "../profiles/work-profile-api";

import { certificateApi, certificateKeys } from "./certificate-api";
import { CertificateFeedback } from "./certificate-feedback";
import { CertificateQuickEditor } from "./certificate-quick-editor";

export function CertificateConfigurationForm({
  company,
  csrfToken,
  configuration,
  initialProfileId = "",
  onSaved,
}: {
  company: CompanyDTO;
  csrfToken: string;
  configuration?: CertificateConfigurationDTO | undefined;
  initialProfileId?: string;
  onSaved: () => void;
}) {
  const { t } = useTranslation("companies");
  const prefix = useId();
  const client = useQueryClient();
  const mounted = useRef(true);
  useEffect(() => {
    mounted.current = true;
    return () => {
      mounted.current = false;
    };
  }, []);
  const [quick, setQuick] = useState<"profile" | "certificate">();
  const profiles = useQuery({
    queryKey: profileKeys.company(company.id),
    queryFn: () => profileApi.get(company.id),
  });
  const resources = useQuery({
    queryKey: inventoryKeys.company(company.id),
    queryFn: () => inventoryApi.get(company.id),
  });
  const catalog = useQuery({
    queryKey: catalogKeys.scope(company.id),
    queryFn: () => catalogApi.get(company.id),
  });
  const form = useForm<CertificateConfigurationInput>({
    resolver: zodResolver(CertificateConfigurationInputSchema),
    defaultValues: certificateDefaults(configuration, initialProfileId),
  });
  const values = form.watch();
  const ready = [profiles.data, resources.data, catalog.data].every(Boolean);
  const fixed = Boolean(configuration || initialProfileId);
  const states = certificateStates(configuration);
  const mutation = useMutation({
    mutationFn: (input: CertificateConfigurationInput) =>
      certificateApi.save(company.id, input, csrfToken, configuration?.id),
    onSuccess: async () => {
      await client.invalidateQueries({ queryKey: certificateKeys.company(company.id) });
      if (mounted.current) {
        onSaved();
      }
    },
  });
  return (
    <>
      <form className="space-y-5" onSubmit={form.handleSubmit((input) => mutation.mutate(input))}>
        <fieldset className="space-y-4" disabled={mutation.isPending}>
          <div className="grid gap-4 sm:grid-cols-2">
            <div className="space-y-2">
              <Label htmlFor={`${prefix}-profile`}>{t("mail.profile")}</Label>
              <SelectWithAction
                action={
                  fixed
                    ? undefined
                    : { label: t("profiles.new"), onClick: () => setQuick("profile") }
                }
                disabled={fixed || !ready}
                id={`${prefix}-profile`}
                label={t("mail.profile")}
                onValueChange={(id) => form.setValue("profileId", id)}
                options={certificateProfiles(values.profileId, profiles.data?.profiles)}
                placeholder={t("mail.choose")}
                required
                value={values.profileId}
              />
            </div>
            <div className="space-y-2">
              <Label htmlFor={`${prefix}-resource`}>{t("certificates.resource")}</Label>
              <SelectWithAction
                action={
                  configuration
                    ? undefined
                    : {
                        label: t("certificates.newResource"),
                        onClick: () => setQuick("certificate"),
                      }
                }
                disabled={!!configuration || !ready}
                id={`${prefix}-resource`}
                label={t("certificates.resource")}
                onValueChange={(id) => form.setValue("resourceId", id)}
                options={certificateOptions(
                  values.resourceId,
                  resources.data?.resources,
                  catalog.data?.items
                )}
                placeholder={t("mail.choose")}
                required
                value={values.resourceId}
              />
            </div>
            <div className="space-y-2">
              <Label htmlFor={`${prefix}-state`}>{t("mail.state")}</Label>
              <SelectWithAction
                id={`${prefix}-state`}
                label={t("mail.state")}
                onValueChange={(value) => {
                  const parsed = CertificateConfigurationInputSchema.shape.state.safeParse(value);
                  if (parsed.success) {
                    form.setValue("state", parsed.data);
                  }
                }}
                options={states.map((value) => ({ value, label: t(`mail.${value}`) }))}
                placeholder={t("mail.choose")}
                required
                value={values.state}
              />
            </div>
          </div>
          <div className="space-y-2">
            <Label htmlFor={`${prefix}-location`}>{t("certificates.location")}</Label>
            <Input
              id={`${prefix}-location`}
              maxLength={255}
              onChange={(event) => form.setValue("location", event.target.value || null)}
              value={values.location ?? ""}
            />
          </div>
          <div className="space-y-2">
            <Label htmlFor={`${prefix}-notes`}>{t("mail.notes")}</Label>
            <Textarea
              id={`${prefix}-notes`}
              maxLength={4000}
              onChange={(event) => form.setValue("notes", event.target.value || null)}
              rows={3}
              value={values.notes ?? ""}
            />
          </div>
        </fieldset>
        {configuration && (
          <p className="text-sm text-muted-foreground">{t("certificates.fixed")}</p>
        )}
        {Object.keys(form.formState.errors).length > 0 && (
          <p className="text-sm text-destructive" role="alert">
            {t("certificates.errors.INVALID_REQUEST")}
          </p>
        )}
        <CertificateFeedback
          error={mutation.error ?? profiles.error ?? resources.error ?? catalog.error}
        />
        <ContextHelp
          description={t("certificates.description")}
          examples={t("certificates.examples")}
          examplesLabel={t("mail.examplesLabel")}
          guidance={t("certificates.guidance")}
          scopeNote={t("certificates.scope")}
          title={t("certificates.help")}
        />
        <FormActions>
          <Button disabled={!ready || mutation.isPending} type="submit">
            {t(mutation.isPending ? "saving" : "save")}
          </Button>
        </FormActions>
      </form>
      {quick && (
        <CertificateQuickEditor
          company={company}
          csrfToken={csrfToken}
          kind={quick}
          onClose={() => setQuick(undefined)}
          onSaved={(field, id) => {
            if (mounted.current) {
              form.setValue(field, id);
              setQuick(undefined);
            }
          }}
        />
      )}
    </>
  );
}

function certificateOptions(
  selected: string,
  resources: readonly ResourceDTO[] = [],
  items: readonly CatalogItemDTO[] = []
) {
  const templates = new Set(
    items
      .filter(
        (item) =>
          item.values.kind === "template" &&
          (item.builtinKey === "template:certificate" || item.values.usage === "certificate")
      )
      .map((item) => item.id)
  );
  return resources
    .filter(
      (item) =>
        templates.has(item.values.templateId) && (item.values.active || item.id === selected)
    )
    .map((item) => ({ value: item.id, label: item.values.name }));
}

function certificateDefaults(
  configuration: CertificateConfigurationDTO | undefined,
  profileId: string
): CertificateConfigurationInput {
  return (
    configuration?.values ?? {
      profileId,
      resourceId: "",
      location: null,
      state: "pending",
      notes: null,
    }
  );
}

function certificateStates(
  configuration: CertificateConfigurationDTO | undefined
): readonly CertificateConfigurationInput["state"][] {
  return configuration
    ? CERTIFICATE_STATE_TRANSITIONS[configuration.values.state]
    : ["pending", "configured"];
}

function certificateProfiles(selected: string, profiles: readonly WorkProfileDTO[] = []) {
  return profiles
    .filter((item) => item.values.active || item.id === selected)
    .map((item) => ({ value: item.id, label: item.values.name }));
}