import { useTranslation } from "react-i18next";

import type { ResourceDTO, ResourceInput, ResourceReferenceDTO } from "../common/inventory";

export function ResourceDetail({
  resource,
  references = [],
}: {
  resource: ResourceDTO;
  references?: readonly ResourceReferenceDTO[];
}) {
  const { t, i18n } = useTranslation("resources");
  const display = (value: string | number | boolean | undefined) =>
    value === undefined
      ? t("noValue")
      : typeof value === "boolean"
        ? t(value ? "yes" : "no")
        : String(value);
  return (
    <div className="space-y-5">
      <p className="text-sm text-muted-foreground">{t("snapshotNotice")}</p>
      <dl className="grid gap-4 sm:grid-cols-2">
        <div>
          <dt className="text-sm text-muted-foreground">{t("template")}</dt>
          <dd>{resource.specification.templateName}</dd>
        </div>
        <div>
          <dt className="text-sm text-muted-foreground">{t("status")}</dt>
          <dd>{t(resource.values.active ? "active" : "inactive")}</dd>
        </div>
        {resource.specification.fields.map((field) => (
          <div key={field.fieldId}>
            <dt className="text-sm text-muted-foreground">
              {field.name}
              {field.unit ? ` (${field.unit})` : ""}
            </dt>
            <dd className="whitespace-pre-wrap break-words">
              {display(resource.values.characteristics[field.fieldId])}
            </dd>
          </div>
        ))}
      </dl>
      <IntegrationSummary integration={resource.values.integration} references={references} />
      {resource.values.notes && (
        <p className="whitespace-pre-wrap break-words">{resource.values.notes}</p>
      )}
      <h3 className="font-medium">
        {t("history")} ({resource.history.length})
      </h3>
      <ol className="space-y-4">
        {[...resource.history].reverse().map((revision) => (
          <li className="space-y-2 rounded-md border p-3 text-sm" key={revision.id}>
            <p className="font-medium">
              {new Intl.DateTimeFormat(i18n.language, {
                dateStyle: "medium",
                timeStyle: "short",
              }).format(new Date(revision.recordedAt))}{" "}
              · {t("recordedBy", { name: revision.actorName })}
            </p>
            <p>
              {revision.values.name} · {t(revision.values.active ? "active" : "inactive")}
            </p>
            <dl className="grid gap-2 sm:grid-cols-2">
              {resource.specification.fields.map((field) => (
                <div key={field.fieldId}>
                  <dt className="text-muted-foreground">{field.name}</dt>
                  <dd className="whitespace-pre-wrap break-words">
                    {display(revision.values.characteristics[field.fieldId])}
                  </dd>
                </div>
              ))}
            </dl>
            <IntegrationSummary integration={revision.values.integration} references={references} />
            {revision.values.notes && (
              <p className="whitespace-pre-wrap break-words">{revision.values.notes}</p>
            )}
          </li>
        ))}
      </ol>
    </div>
  );
}

function IntegrationSummary({
  integration,
  references,
}: {
  integration: ResourceInput["integration"];
  references: readonly ResourceReferenceDTO[];
}) {
  const { t } = useTranslation("resources");
  if (!integration) {
    return null;
  }
  const entries =
    integration.kind === "mailbox"
      ? [
          { label: t("mailboxKind"), value: t(integration.mailboxKind) },
          {
            label: t("relatedAccount"),
            value: referenceName(integration.accountId, references, t("noValue")),
          },
        ]
      : (["resourceTypeId", "systemId", "environmentId"] as const).map((key) => ({
          label: t(key),
          value: referenceName(integration[key], references, t("noValue")),
        }));
  return (
    <dl className="grid gap-2 sm:grid-cols-2">
      {entries.map((entry) => (
        <div key={entry.label}>
          <dt className="text-sm text-muted-foreground">{entry.label}</dt>
          <dd>{entry.value}</dd>
        </div>
      ))}
    </dl>
  );
}
function referenceName(
  id: string | null,
  references: readonly ResourceReferenceDTO[],
  missing: string
) {
  return id ? (references.find((item) => item.id === id)?.name ?? id) : missing;
}