import { api } from "./client";

export interface Account {
  id: string;
  name: string;
  institution: string | null;
  type: string;
  currency: string;
  current_balance: number;
  credit_limit: number | null;
  interest_rate: number | null;
  is_active: boolean;
  include_in_net_worth: boolean;
  color: string;
  icon: string | null;
  notes: string | null;
  created_at: string;
  updated_at: string;
}

export interface AccountCreate {
  name: string;
  institution?: string;
  type: string;
  currency?: string;
  credit_limit?: number;
  interest_rate?: number;
  include_in_net_worth?: boolean;
  color?: string;
  opening_balance?: number;
  notes?: string;
}

export async function getAccounts(): Promise<Account[]> {
  const res = await api.get("/accounts");
  return res.data;
}

export async function createAccount(data: AccountCreate): Promise<Account> {
  const res = await api.post("/accounts", data);
  return res.data;
}

export async function updateAccount(id: string, data: Partial<AccountCreate>): Promise<Account> {
  const res = await api.put(`/accounts/${id}`, data);
  return res.data;
}

export async function deleteAccount(id: string): Promise<void> {
  await api.delete(`/accounts/${id}`);
}

export interface CsvMapping {
  date: string;
  description: string;
  amount: string | null;
  debit: string | null;
  credit: string | null;
  balance: string | null;
  reference: string | null;
}

export interface ImportPreview {
  detected_format: string | null;
  headers: string[];
  mapping: CsvMapping;
  total_rows: number;
  preview: {
    date_raw: string;
    description_raw: string;
    amount_raw: number | null;
    balance_raw?: string;
  }[];
}

export async function previewImport(accountId: string, file: File): Promise<ImportPreview> {
  const form = new FormData();
  form.append("file", file);
  const res = await api.post(`/accounts/${accountId}/import/preview`, form);
  return res.data;
}

export async function importCsvToAccount(
  accountId: string,
  file: File,
  mapping: CsvMapping
): Promise<{ imported: number; skipped: number }> {
  const form = new FormData();
  form.append("file", file);
  form.append("date_col", mapping.date);
  form.append("description_col", mapping.description);
  form.append("amount_col", mapping.amount ?? "");
  form.append("debit_col", mapping.debit ?? "");
  form.append("credit_col", mapping.credit ?? "");
  const res = await api.post(`/accounts/${accountId}/import`, form);
  return res.data;
}

export async function getNetWorth(): Promise<{
  total_assets: number;
  total_liabilities: number;
  net_worth: number;
  base_currency: string;
}> {
  const res = await api.get("/accounts/net-worth");
  return res.data;
}