"use client";

import { useState, useEffect, useMemo } from "react";
import { FolderKanban, RefreshCw } from "lucide-react";

import { Project } from "@/types/project";
import { getProjects } from "@/lib/projectsService";
import { DataTable } from "./data-table";
import { DataTableToolbar } from "./data-table-toolbar";
import { DataTableSkeleton } from "./data-table-skeleton";
import { EmptyState } from "./empty-state";
import { projectColumns } from "./columns";
import { Button } from "@/components/ui/button";

export function ProjectsTable() {
  const [projects, setProjects] = useState<Project[]>([]);
  const [isLoading, setIsLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);
  
  // Filtros
  const [searchValue, setSearchValue] = useState("");
  const [statusFilter, setStatusFilter] = useState("all");

  // Cargar proyectos
  const fetchProjects = async () => {
    setIsLoading(true);
    setError(null);
    try {
      const data = await getProjects();
      setProjects(data);
    } catch (err) {
      console.error("Error fetching projects:", err);
      setError("Error al cargar los proyectos. Por favor, intenta de nuevo.");
    } finally {
      setIsLoading(false);
    }
  };

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

  // Filtrar proyectos
  const filteredProjects = useMemo(() => {
    let result = [...projects];

    // Filtro de búsqueda (nombre o referencia)
    if (searchValue) {
      const search = searchValue.toLowerCase();
      result = result.filter(
        (project) =>
          project.name.toLowerCase().includes(search) ||
          project.ref.toLowerCase().includes(search) ||
          project.client.toLowerCase().includes(search)
      );
    }

    // Filtro de estado
    if (statusFilter !== "all") {
      result = result.filter((project) => project.status === statusFilter);
    }

    return result;
  }, [projects, searchValue, statusFilter]);

  // Limpiar filtros
  const handleClearFilters = () => {
    setSearchValue("");
    setStatusFilter("all");
  };

  // Contar seleccionados (placeholder - el DataTable lo maneja internamente)
  const selectedCount = 0;

  // Estado de error
  if (error) {
    return (
      <div className="flex flex-col items-center justify-center p-8 text-center">
        <div className="mx-auto flex h-12 w-12 items-center justify-center rounded-full bg-destructive/10">
          <FolderKanban className="h-6 w-6 text-destructive" />
        </div>
        <h3 className="mt-4 text-lg font-semibold">Error al cargar</h3>
        <p className="mt-2 text-sm text-muted-foreground max-w-sm">{error}</p>
        <Button onClick={fetchProjects} variant="outline" className="mt-4">
          <RefreshCw className="mr-2 h-4 w-4" />
          Reintentar
        </Button>
      </div>
    );
  }

  // Estado de carga
  if (isLoading) {
    return <DataTableSkeleton />;
  }

  // Estado vacío
  if (projects.length === 0) {
    return (
      <EmptyState
        title="No hay proyectos"
        description="Aún no tienes proyectos creados. Comienza creando tu primer proyecto."
        actionLabel="Crear proyecto"
        onAction={() => console.log("Create project")}
      />
    );
  }

  return (
    <div className="space-y-4">
      <DataTableToolbar
        searchValue={searchValue}
        onSearchChange={setSearchValue}
        statusFilter={statusFilter}
        onStatusFilterChange={setStatusFilter}
        selectedCount={selectedCount}
        onClearFilters={handleClearFilters}
      />
      <DataTable
        columns={projectColumns}
        data={filteredProjects}
        searchKey="name"
        searchValue={searchValue}
      />
    </div>
  );
}