import type { BeoOption, LogbuchEintrag, ObjektOption, SelectedObjekt, Wetter } from '@/types/logbuch';

const PHP_DB_URL = process.env.PHP_DB_URL ?? 'http://localhost:8080/DB4js_all.php';

async function call<T>(cmd: string, params: object = {}): Promise<T> {
  const res = await fetch(PHP_DB_URL, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ cmd, ...params }),
    cache: 'no-store',
  });
  if (!res.ok) {
    let detail = '';
    try { detail = await res.text(); } catch { /* ignore */ }
    throw new Error(`DB4js ${cmd} HTTP ${res.status}: ${detail}`);
  }
  const json: unknown = await res.json();
  if (json && typeof json === 'object' && 'error' in json) {
    throw new Error(`DB4js ${cmd}: ${(json as { error: string }).error}`);
  }
  return json as T;
}

// ---- Auth / Benutzer ----

export interface Beo {
  id: number;
  name: string;
  vorname: string | null;
  'kürzel': string | null;
  pw: string | null;
  MustChangePassword: number;
  role: string | null;
}

export interface BeoUser {
  id: number;
  'kürzel': string | null;
  name: string;
  vorname: string | null;
  role: string | null;
  hasPw: boolean;
}

export async function getBeoByKuerzel(kuerzel: string): Promise<Beo | null> {
  const r = await call<{ beo: Beo | null }>('LB_AUTH_KUERZEL', { kuerzel });
  return r.beo;
}

export async function getBeoByName(name: string): Promise<Beo | null> {
  const r = await call<{ beo: Beo | null }>('LB_AUTH_NAME', { name });
  return r.beo;
}

export async function updateBeoPassword(id: number, pwHash: string): Promise<void> {
  await call('LB_UPDATE_PW', { id, pw: pwHash });
}

export async function resetBeoPassword(id: number): Promise<void> {
  await call('LB_RESET_PW', { id });
}

export async function listUsers(): Promise<BeoUser[]> {
  return call<BeoUser[]>('LB_LIST_USERS');
}

// ---- Logbuch ----

export interface ListLogbuchParams {
  kuppel?: string;
  limit?: number;
  offset?: number;
  month?: string;
  search?: string;
  order?: string;
}

export async function listLogbuch(
  params: ListLogbuchParams
): Promise<{ entries: LogbuchEintrag[]; total: number }> {
  return call('LB_LIST_LOGBUCH', params);
}

export interface CreateLogbuchData {
  Kuppel: string;
  ArtFuehrung: string;
  SonderName?: string | null;
  Beginn: string;
  Ende: string;
  Besucher?: number;
  beoIds?: number[];
  objekte?: SelectedObjekt[];
  Bemerkungen?: string | null;
  Wetter?: Partial<Wetter> | null;
  created_by: number;
}

export async function createLogbuch(data: CreateLogbuchData): Promise<{ id: number }> {
  return call('LB_CREATE_LOGBUCH', data);
}

export async function updateLogbuch(
  id: number,
  userId: number,
  userRole: string,
  data: Omit<CreateLogbuchData, 'created_by'>
): Promise<void> {
  await call('LB_UPDATE_LOGBUCH', { id, user_id: userId, user_role: userRole, ...data });
}

export async function deleteLogbuch(
  id: number,
  userId: number,
  userRole: string
): Promise<void> {
  await call('LB_DELETE_LOGBUCH', { id, user_id: userId, user_role: userRole });
}

// ---- BEOs & Objekte ----

export async function getBeos(): Promise<BeoOption[]> {
  return call('LB_GET_BEOS');
}

export async function getObjekte(): Promise<ObjektOption[]> {
  return call('LB_GET_OBJEKTE');
}

export async function createObjekt(name: string): Promise<ObjektOption> {
  return call('LB_CREATE_OBJEKT', { name });
}

export async function updateObjekt(id: number, name: string): Promise<ObjektOption> {
  return call('LB_UPDATE_OBJEKT', { id, name });
}

export async function deleteObjekt(id: number): Promise<void> {
  await call('LB_DELETE_OBJEKT', { id });
}

export async function listObjekteAdmin(): Promise<{ ID: number; Name: string; LastUsed: string | null }[]> {
  return call('LB_LIST_OBJEKTE_ADMIN');
}

// ---- Auswertungen ----

export interface FahrkostenRow {
  ID: number;
  Kuerzel: string;
  Name: string;
  Anzahl: number;
}

export async function getFahrkosten(ab: string): Promise<FahrkostenRow[]> {
  return call('LB_FAHRKOSTEN', { ab });
}

export interface StatistikResult {
  monthly: {
    monat: number;
    tageFuehrungen: number; tageBeob: number; tageTD: number;
    tageSonst: number; tageBEOS: number; tagesToT: number; tageGesamt: number;
    besucherRF: number; besucherSF: number; besucherSonF: number;
    besucherPrF: number; besucherToT: number; besucherGesamt: number;
  }[];
  cumulative: number;
  tage: number;
  year: number;
}

export async function getStatistik(year: number): Promise<StatistikResult> {
  return call('LB_STATISTIK', { year });
}

// ---- Backup ----

export interface BackupTable {
  name: string;
  createSql: string;
  rows: Record<string, string | number | null>[];
}

export async function getBackupData(): Promise<{ tables: BackupTable[] }> {
  return call('LB_BACKUP_DATA');
}