// lib/api.ts
// Browser-safe thin client that calls our own /api/pb proxy.
// This module is "use client" friendly — it never imports PocketBase
// directly and never touches process.env.PB_TOKEN.

import type {
  PBList,
  ListParams,
  SarsSubmissionReturnType,
  YsterbaardSarsSubmissionFlag
} from "./types";

export interface ClientListParams extends ListParams {
  collection: string;
}

export interface ClientGetParams {
  collection: string;
  id: string;
  expand?: string;
}

/** Type-safe client fetcher for paginated lists. */
export async function pbList<T>(params: ClientListParams): Promise<PBList<T>> {
  const qs = new URLSearchParams();
  qs.set("collection", params.collection);
  if (params.page) qs.set("page", String(params.page));
  if (params.perPage) qs.set("perPage", String(params.perPage));
  if (params.sort) qs.set("sort", params.sort);
  if (params.filter) qs.set("filter", params.filter);
  if (params.expand) qs.set("expand", params.expand);
  if (params.fields) qs.set("fields", params.fields);

  const res = await fetch(`/api/pb/records/list?${qs.toString()}`, {
    cache: "no-store"
  });
  if (!res.ok) {
    const text = await res.text();
    throw new Error(`PB list failed (${res.status}): ${text || res.statusText}`);
  }
  return res.json();
}

export async function pbGet<T>(params: ClientGetParams): Promise<T> {
  const qs = new URLSearchParams();
  qs.set("collection", params.collection);
  if (params.expand) qs.set("expand", params.expand);

  const res = await fetch(`/api/pb/records/${params.id}?${qs.toString()}`, {
    cache: "no-store"
  });
  if (!res.ok) {
    const text = await res.text();
    throw new Error(`PB get failed (${res.status}): ${text || res.statusText}`);
  }
  return res.json();
}

/**
 * Single-purpose toggle for `is_client` on a director or company row.
 * Server enforces a hard allowlist; this client only sends
 * { collection, id, is_client }, nothing else.
 *
 * Used by the directors/companies table rows and the detail-page toggle.
 */
export async function pbToggleClient(params: {
  collection: "ysterbaard_directors" | "ysterbaard_companies";
  id: string;
  is_client: boolean;
}): Promise<{ ok: true; id: string; is_client: boolean; updated: string }> {
  const res = await fetch("/api/pb/records/toggle-client", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({
      collection: params.collection,
      id: params.id,
      is_client: params.is_client
    })
  });
  if (!res.ok) {
    const text = await res.text();
    throw new Error(`PB toggle failed (${res.status}): ${text || res.statusText}`);
  }
  return res.json();
}

/**
 * Creates a new record on any collection.
 * Only allowlisted fields pass through.
 */
export async function pbCreate(params: {
  collection: string;
  fields: Record<string, string | number | string[]>;
}): Promise<unknown> {
  const res = await fetch("/api/pb/records/create", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(params),
  });
  if (!res.ok) {
    const text = await res.text();
    throw new Error(`PB create failed (${res.status}): ${text || res.statusText}`);
  }
  return res.json();
}

/**
 * Creates a new director or company record with is_client=true.
 * Only the allowlisted fields pass through — no arbitrary PB writes.
 *
 * Used by the Add Director / Add Company modal forms.
 */
export async function pbCreateClient(params: {
  collection: "ysterbaard_directors" | "ysterbaard_companies";
  fields: Record<string, string>;
}): Promise<unknown> {
  const res = await fetch("/api/pb/records/create", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(params),
  });
  if (!res.ok) {
    const text = await res.text();
    throw new Error(`PB create failed (${res.status}): ${text || res.statusText}`);
  }
  return res.json();
}

/**
 * Updates editable fields on an existing director or company record.
 * Only allowlisted fields pass through. Use for the in-app edit form.
 */
export async function pbPatch(params: {
  collection: string;
  id: string;
  fields: Record<string, string | number | boolean | string[]>;
}): Promise<unknown> {
  const res = await fetch(`/api/pb/records/${params.id}?collection=${params.collection}`, {
    method: "PATCH",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(params.fields),
  });
  if (!res.ok) {
    const text = await res.text();
    throw new Error(`PB patch failed (${res.status}): ${text || res.statusText}`);
  }
  return res.json();
}

/**
 * Deletes a director or company record permanently.
 */
export async function pbDelete(params: {
  collection: string;
  id: string;
}): Promise<void> {
  const res = await fetch(`/api/pb/records/${params.id}?collection=${params.collection}`, {
    method: "DELETE",
  });
  if (!res.ok) {
    const text = await res.text();
    throw new Error(`PB delete failed (${res.status}): ${text || res.statusText}`);
  }
}

// ─────────────────────────────────────────────────────────────────────────
// Document management helpers
// ─────────────────────────────────────────────────────────────────────────

export interface DocType {
  id: string;
  name: string;
  context: "director" | "company";
  description: string | null;
}

export async function fetchDocumentTypes(context?: "director" | "company"): Promise<PBList<DocType>> {
  const qs = context ? `?context=${context}` : "";
  const res = await fetch(`/api/documents/types${qs}`, { cache: "no-store" });
  if (!res.ok) throw new Error(`Failed to load document types (${res.status})`);
  return res.json();
}

export async function createDocumentType(data: {
  name: string;
  context: "director" | "company";
  description?: string;
}): Promise<DocType> {
  const res = await fetch("/api/documents/types", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(data),
  });
  if (!res.ok) {
    const err = await res.json().catch(() => ({}));
    throw new Error((err as { error?: string }).error ?? "Failed to create document type");
  }
  return res.json();
}

export async function updateDocumentType(id: string, data: { name?: string; description?: string }): Promise<DocType> {
  const res = await fetch(`/api/documents/types/${id}`, {
    method: "PATCH",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(data),
  });
  if (!res.ok) {
    const err = await res.json().catch(() => ({}));
    throw new Error((err as { error?: string }).error ?? "Failed to update document type");
  }
  return res.json();
}

export async function deleteDocumentType(id: string): Promise<void> {
  const res = await fetch(`/api/documents/types/${id}`, { method: "DELETE" });
  if (!res.ok) {
    const err = await res.json().catch(() => ({}));
    throw new Error((err as { error?: string }).error ?? "Failed to delete document type");
  }
}

export async function uploadDirectorDocument(formData: FormData): Promise<unknown> {
  const res = await fetch("/api/documents/director/upload", { method: "POST", body: formData });
  if (!res.ok) {
    const err = await res.json().catch(() => ({}));
    throw new Error((err as { error?: string }).error ?? "Upload failed");
  }
  return res.json();
}

export async function uploadCompanyDocument(formData: FormData): Promise<unknown> {
  const res = await fetch("/api/documents/company/upload", { method: "POST", body: formData });
  if (!res.ok) {
    const err = await res.json().catch(() => ({}));
    throw new Error((err as { error?: string }).error ?? "Upload failed");
  }
  return res.json();
}

export async function deleteDirectorDocument(id: string): Promise<void> {
  const res = await fetch(`/api/documents/director/${id}`, { method: "DELETE" });
  if (!res.ok) throw new Error(`Delete failed (${res.status})`);
}

export async function deleteCompanyDocument(id: string): Promise<void> {
  const res = await fetch(`/api/documents/company/${id}`, { method: "DELETE" });
  if (!res.ok) throw new Error(`Delete failed (${res.status})`);
}

// ─────────────────────────────────────────────────────────────────────────
// SARS submission tick-boxes
// ─────────────────────────────────────────────────────────────────────────

export async function fetchSarsSubmissionFlags(
  returnType: SarsSubmissionReturnType,
  period: string
): Promise<PBList<YsterbaardSarsSubmissionFlag>> {
  const qs = new URLSearchParams({ return_type: returnType, period });
  const res = await fetch(`/api/sars-submission-flags?${qs.toString()}`, {
    cache: "no-store"
  });
  if (!res.ok) {
    const text = await res.text();
    throw new Error(
      `fetchSarsSubmissionFlags failed (${res.status}): ${text || res.statusText}`
    );
  }
  return res.json();
}

export async function upsertSarsSubmissionFlag(params: {
  company: string;
  return_type: SarsSubmissionReturnType;
  period: string;
  submitted: boolean;
}): Promise<YsterbaardSarsSubmissionFlag> {
  const res = await fetch("/api/sars-submission-flags", {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(params)
  });
  if (!res.ok) {
    const text = await res.text();
    throw new Error(
      `upsertSarsSubmissionFlag failed (${res.status}): ${text || res.statusText}`
    );
  }
  return res.json();
}

export async function clearSarsSubmissionFlags(
  returnType: SarsSubmissionReturnType,
  period: string
): Promise<{ ok: true; deleted: number }> {
  const qs = new URLSearchParams({ return_type: returnType, period });
  const res = await fetch(`/api/sars-submission-flags?${qs.toString()}`, {
    method: "DELETE"
  });
  if (!res.ok) {
    const text = await res.text();
    throw new Error(
      `clearSarsSubmissionFlags failed (${res.status}): ${text || res.statusText}`
    );
  }
  return res.json();
}