import { prisma } from "../database/client";
import { decryptSecret, encryptSecret } from "../security/crypto";
import { AppError } from "../security/errors";
import { OpenSubtitlesClient } from "../opensubtitles/client";

const OS_ID = "opensubtitles";
const DEFAULT_UA = "MediaCluster v1.3.2";

export async function isOpenSubtitlesEnabled(): Promise<boolean> {
  const row = await prisma.integrationSetting.findUnique({ where: { id: OS_ID } });
  if (!row) return true;
  return row.enabled;
}

export type OpenSubtitlesSettingsPublic = {
  configured: boolean;
  enabled: boolean;
  username: string;
  userAgent: string;
  hasApiKey: boolean;
  hasPassword: boolean;
  comOk: boolean;
  orgOk: boolean;
  warning: string | null;
};

export async function getOpenSubtitlesSettingsPublic(): Promise<OpenSubtitlesSettingsPublic> {
  const row = await prisma.integrationSetting.findUnique({ where: { id: OS_ID } });
  const enabled = row?.enabled ?? true;
  return {
    configured: enabled,
    enabled,
    username: row?.username ?? "",
    userAgent: row?.userAgent?.trim() || DEFAULT_UA,
    hasApiKey: !!row?.apiKeyEnc,
    hasPassword: !!row?.passwordEnc,
    comOk: false,
    orgOk: false,
    warning: null,
  };
}

export async function upsertOpenSubtitlesSettings(
  sessionSecret: string,
  input: {
    apiKey?: string;
    username?: string;
    password?: string;
    userAgent?: string;
    enabled?: boolean;
  }
): Promise<OpenSubtitlesSettingsPublic> {
  const existing = await prisma.integrationSetting.findUnique({ where: { id: OS_ID } });
  const apiKeyTrim = input.apiKey?.trim();
  const apiKeyEnc = apiKeyTrim
    ? encryptSecret(apiKeyTrim, sessionSecret)
    : existing?.apiKeyEnc ?? null;
  const passwordEnc =
    input.password !== undefined
      ? input.password.trim()
        ? encryptSecret(input.password.trim(), sessionSecret)
        : null
      : existing?.passwordEnc ?? null;
  const username =
    input.username !== undefined ? input.username.trim() || null : existing?.username ?? null;
  const userAgent =
    input.userAgent !== undefined
      ? input.userAgent.trim() || DEFAULT_UA
      : existing?.userAgent?.trim() || DEFAULT_UA;

  await prisma.integrationSetting.upsert({
    where: { id: OS_ID },
    create: {
      id: OS_ID,
      apiKeyEnc,
      username,
      passwordEnc,
      userAgent,
      enabled: input.enabled ?? true,
    },
    update: {
      apiKeyEnc,
      username,
      passwordEnc,
      userAgent,
      enabled: input.enabled ?? true,
    },
  });

  let comOk = false;
  let orgOk = false;
  let warning: string | null = null;

  const client = await createOpenSubtitlesClientFromDb(sessionSecret);
  if (client) {
    try {
      await client.search({ imdbId: "tt1375666", languages: "nl" });
      comOk = true;
    } catch (err) {
      warning = err instanceof Error ? err.message : "OpenSubtitles.com test mislukt";
    }
  }

  try {
    const { OpenSubtitlesOrgClient } = await import("../opensubtitles/org-client");
    await new OpenSubtitlesOrgClient().search({ imdbId: "tt1375666", languages: "nl" });
    orgOk = true;
  } catch (err) {
    const msg = err instanceof Error ? err.message : "OpenSubtitles.org test mislukt";
    warning = warning ? `${warning} · ${msg}` : msg;
  }

  if (!comOk && !orgOk) {
    throw new AppError("OPENSUBTITLES", warning || "Geen OpenSubtitles-bron bereikbaar", 400);
  }

  // Opslaan mag als .org OK is, ook als .com login/API 403 geeft
  const pub = await getOpenSubtitlesSettingsPublic();
  return { ...pub, comOk, orgOk, warning };
}

export async function createOpenSubtitlesClientFromDb(
  sessionSecret: string
): Promise<OpenSubtitlesClient | null> {
  const row = await prisma.integrationSetting.findUnique({ where: { id: OS_ID } });
  if (!row?.enabled || !row.apiKeyEnc) return null;
  const apiKey = decryptSecret(row.apiKeyEnc, sessionSecret);
  const password = row.passwordEnc ? decryptSecret(row.passwordEnc, sessionSecret) : undefined;
  return new OpenSubtitlesClient(
    apiKey,
    row.username ?? undefined,
    password,
    row.userAgent
  );
}