"use client";

import type {
  BankingData,
  Account,
  Transaction,
  Folder,
  Category,
} from "./types";

const API_BASE = "/api/banking";

export async function loadData(): Promise<BankingData> {
  const response = await fetch(API_BASE);
  if (!response.ok) {
    throw new Error("Failed to load data");
  }
  return response.json();
}

export async function addAccount(
  account: Omit<Account, "id">,
): Promise<Account> {
  const response = await fetch(`${API_BASE}/accounts`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(account),
  });
  if (!response.ok) {
    throw new Error("Failed to add account");
  }
  return response.json();
}

export async function updateAccount(account: Account): Promise<Account> {
  const response = await fetch(`${API_BASE}/accounts`, {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(account),
  });
  if (!response.ok) {
    throw new Error("Failed to update account");
  }
  return response.json();
}

export async function deleteAccount(accountId: string): Promise<void> {
  const response = await fetch(`${API_BASE}/accounts?id=${accountId}`, {
    method: "DELETE",
  });
  if (!response.ok) {
    throw new Error("Failed to delete account");
  }
}

export async function addTransactions(
  transactions: Transaction[],
): Promise<{ count: number; transactions: Transaction[] }> {
  const response = await fetch(`${API_BASE}/transactions`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(transactions),
  });
  if (!response.ok) {
    throw new Error("Failed to add transactions");
  }
  return response.json();
}

export async function updateTransaction(
  transaction: Transaction,
): Promise<Transaction> {
  const response = await fetch(`${API_BASE}/transactions`, {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(transaction),
  });
  if (!response.ok) {
    throw new Error("Failed to update transaction");
  }
  return response.json();
}

export async function addFolder(folder: Omit<Folder, "id">): Promise<Folder> {
  const response = await fetch(`${API_BASE}/folders`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(folder),
  });
  if (!response.ok) {
    throw new Error("Failed to add folder");
  }
  return response.json();
}

export async function updateFolder(folder: Folder): Promise<Folder> {
  const response = await fetch(`${API_BASE}/folders`, {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(folder),
  });
  if (!response.ok) {
    throw new Error("Failed to update folder");
  }
  return response.json();
}

export async function deleteFolder(folderId: string): Promise<void> {
  const response = await fetch(`${API_BASE}/folders?id=${folderId}`, {
    method: "DELETE",
  });
  if (!response.ok) {
    throw new Error("Failed to delete folder");
  }
}

export async function addCategory(
  category: Omit<Category, "id">,
): Promise<Category> {
  const response = await fetch(`${API_BASE}/categories`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(category),
  });
  if (!response.ok) {
    throw new Error("Failed to add category");
  }
  return response.json();
}

export async function updateCategory(category: Category): Promise<Category> {
  const response = await fetch(`${API_BASE}/categories`, {
    method: "PUT",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify(category),
  });
  if (!response.ok) {
    throw new Error("Failed to update category");
  }
  return response.json();
}

export async function deleteCategory(categoryId: string): Promise<void> {
  const response = await fetch(`${API_BASE}/categories?id=${categoryId}`, {
    method: "DELETE",
  });
  if (!response.ok) {
    throw new Error("Failed to delete category");
  }
}

// Auto-categorize a transaction based on keywords
export function autoCategorize(
  description: string,
  categories: Category[],
): string | null {
  const lowerDesc = description.toLowerCase();

  for (const category of categories) {
    for (const keyword of category.keywords) {
      const lowerKeyword = keyword.toLowerCase();

      // Pour les keywords courts (< 6 chars), matcher uniquement des mots entiers
      // Évite les faux positifs comme "chat" dans "achat"
      if (lowerKeyword.length < 6) {
        const wordBoundary = new RegExp(`\\b${escapeRegex(lowerKeyword)}\\b`);
        if (wordBoundary.test(lowerDesc)) {
          return category.id;
        }
      } else {
        // Pour les keywords plus longs, includes() suffit
        if (lowerDesc.includes(lowerKeyword)) {
          return category.id;
        }
      }
    }
  }

  return null;
}

// Échappe les caractères spéciaux pour les regex
function escapeRegex(str: string): string {
  return str.replace(/[.*+?^${}()|[\]\\]/g, "\\$&");
}

export function generateId(): string {
  return `${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
}