"use client";

import { useState } from "react";
import { PageLayout, LoadingState, PageHeader } from "@/components/layout";
import {
  FolderTreeItem,
  FolderEditDialog,
  AccountFolderDialog,
} from "@/components/folders";
import { useBankingData } from "@/lib/hooks";
import { Button } from "@/components/ui/button";
import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
import { Plus } from "lucide-react";
import {
  addFolder,
  updateFolder,
  deleteFolder,
  updateAccount,
} from "@/lib/store-db";
import type { Folder as FolderType, Account } from "@/lib/types";

export default function FoldersPage() {
  const { data, isLoading, refresh } = useBankingData();
  const [isDialogOpen, setIsDialogOpen] = useState(false);
  const [editingFolder, setEditingFolder] = useState<FolderType | null>(null);
  const [formData, setFormData] = useState({
    name: "",
    parentId: "folder-root" as string | null,
    color: "#6366f1",
  });

  // Account editing state
  const [isAccountDialogOpen, setIsAccountDialogOpen] = useState(false);
  const [editingAccount, setEditingAccount] = useState<Account | null>(null);
  const [accountFormData, setAccountFormData] = useState({
    name: "",
    type: "CHECKING" as Account["type"],
    folderId: "folder-root",
  });

  if (isLoading || !data) {
    return <LoadingState />;
  }

  const formatCurrency = (amount: number) => {
    return new Intl.NumberFormat("fr-FR", {
      style: "currency",
      currency: "EUR",
    }).format(amount);
  };

  const rootFolders = data.folders.filter((f) => f.parentId === null);

  const handleNewFolder = () => {
    setEditingFolder(null);
    setFormData({ name: "", parentId: "folder-root", color: "#6366f1" });
    setIsDialogOpen(true);
  };

  const handleEdit = (folder: FolderType) => {
    setEditingFolder(folder);
    setFormData({
      name: folder.name,
      parentId: folder.parentId || "folder-root",
      color: folder.color,
    });
    setIsDialogOpen(true);
  };

  const handleSave = async () => {
    const parentId =
      formData.parentId === "folder-root" ? null : formData.parentId;

    try {
      if (editingFolder) {
        await updateFolder({
          ...editingFolder,
          name: formData.name,
          parentId,
          color: formData.color,
        });
      } else {
        await addFolder({
          name: formData.name,
          parentId,
          color: formData.color,
          icon: "folder",
        });
      }
      refresh();
      setIsDialogOpen(false);
    } catch (error) {
      console.error("Error saving folder:", error);
      alert("Erreur lors de la sauvegarde du dossier");
    }
  };

  const handleDelete = async (folderId: string) => {
    if (
      !confirm(
        "Supprimer ce dossier ? Les comptes seront déplacés à la racine."
      )
    )
      return;

    try {
      await deleteFolder(folderId);
      refresh();
    } catch (error) {
      console.error("Error deleting folder:", error);
      alert("Erreur lors de la suppression du dossier");
    }
  };

  const handleEditAccount = (account: Account) => {
    setEditingAccount(account);
    setAccountFormData({
      name: account.name,
      type: account.type,
      folderId: account.folderId || "folder-root",
    });
    setIsAccountDialogOpen(true);
  };

  const handleSaveAccount = async () => {
    if (!editingAccount) return;

    try {
      await updateAccount({
        ...editingAccount,
        name: accountFormData.name,
        type: accountFormData.type,
        folderId:
          accountFormData.folderId === "folder-root"
            ? null
            : accountFormData.folderId,
      });
      refresh();
      setIsAccountDialogOpen(false);
      setEditingAccount(null);
    } catch (error) {
      console.error("Error updating account:", error);
      alert("Erreur lors de la mise à jour du compte");
    }
  };

  return (
    <PageLayout>
      <PageHeader
        title="Organisation"
        description="Organisez vos comptes en dossiers"
        actions={
          <Button onClick={handleNewFolder}>
            <Plus className="w-4 h-4 mr-2" />
            Nouveau dossier
          </Button>
        }
      />

      <Card>
        <CardHeader>
          <CardTitle>Arborescence des comptes</CardTitle>
        </CardHeader>
        <CardContent>
          <div className="space-y-1">
            {rootFolders.map((folder) => (
              <FolderTreeItem
                key={folder.id}
                folder={folder}
                accounts={data.accounts}
                allFolders={data.folders}
                level={0}
                onEdit={handleEdit}
                onDelete={handleDelete}
                onEditAccount={handleEditAccount}
                formatCurrency={formatCurrency}
              />
            ))}
          </div>
        </CardContent>
      </Card>

      <FolderEditDialog
        open={isDialogOpen}
        onOpenChange={setIsDialogOpen}
        editingFolder={editingFolder}
        formData={formData}
        onFormDataChange={setFormData}
        folders={data.folders}
        onSave={handleSave}
      />

      <AccountFolderDialog
        open={isAccountDialogOpen}
        onOpenChange={setIsAccountDialogOpen}
        formData={accountFormData}
        onFormDataChange={setAccountFormData}
        folders={data.folders}
        onSave={handleSaveAccount}
      />
    </PageLayout>
  );
}
