"use client";

import { useState, useEffect, useCallback } from "react";
import {
  getTemplates,
  createTemplate,
  updateTemplate,
  deleteTemplate,
} from "@/lib/api/template.api";
import { mapTemplatesApiResponse } from "@/lib/api/mappers/template.mappers";
import type {
  TemplateRow,
  CreateTemplateDto,
  UpdateTemplateDto,
} from "@/lib/api/types/template.types";

// ─── useTemplates ─────────────────────────────────────────────────────────────
export function useTemplates() {
  const [templates, setTemplates] = useState<TemplateRow[]>([]);
  const [loading, setLoading]     = useState(false);
  const [error, setError]         = useState<string | null>(null);

  const refresh = useCallback(() => {
    setLoading(true);
    setError(null);
    getTemplates(1, 1000)
      .then((data) => setTemplates(mapTemplatesApiResponse(data)))
      .catch((err) => setError(err.message))
      .finally(() => setLoading(false));
  }, []);

  useEffect(() => { refresh(); }, [refresh]);

  return { templates, loading, error, refresh };
}

// ─── useTemplateMutations ─────────────────────────────────────────────────────
export function useTemplateMutations(onSuccess?: () => void) {
  const [saving, setSaving]               = useState(false);
  const [deleting, setDeleting]           = useState(false);
  const [mutationError, setMutationError] = useState<string | null>(null);

  const create = async (dto: CreateTemplateDto) => {
    setSaving(true); setMutationError(null);
    try { const r = await createTemplate(dto); onSuccess?.(); return r; }
    catch (err: any) { setMutationError(err.message); return null; }
    finally { setSaving(false); }
  };

  const update = async (id: number, dto: UpdateTemplateDto) => {
    setSaving(true); setMutationError(null);
    try { const r = await updateTemplate(id, dto); onSuccess?.(); return r; }
    catch (err: any) { setMutationError(err.message); return null; }
    finally { setSaving(false); }
  };

  const remove = async (id: number) => {
    setDeleting(true); setMutationError(null);
    try { await deleteTemplate(id); onSuccess?.(); return true; }
    catch (err: any) { setMutationError(err.message); return false; }
    finally { setDeleting(false); }
  };

  return { create, update, remove, saving, deleting, mutationError };
}