import { useCallback, useEffect } from "react";
import { useNavigate } from "react-router-dom";
import { projectsApi } from "../api/projects";
import { useApi } from "../hooks/useApi";
import { useCompany } from "../context/CompanyContext";
import { useDialog } from "../context/DialogContext";
import { useBreadcrumbs } from "../context/BreadcrumbContext";
import { EntityRow } from "../components/EntityRow";
import { StatusBadge } from "../components/StatusBadge";
import { EmptyState } from "../components/EmptyState";
import { formatDate } from "../lib/utils";
import { Button } from "@/components/ui/button";
import { Hexagon, Plus } from "lucide-react";

export function Projects() {
  const { selectedCompanyId } = useCompany();
  const { openNewProject } = useDialog();
  const { setBreadcrumbs } = useBreadcrumbs();
  const navigate = useNavigate();

  useEffect(() => {
    setBreadcrumbs([{ label: "Projects" }]);
  }, [setBreadcrumbs]);

  const fetcher = useCallback(() => {
    if (!selectedCompanyId) return Promise.resolve([]);
    return projectsApi.list(selectedCompanyId);
  }, [selectedCompanyId]);

  const { data: projects, loading, error } = useApi(fetcher);

  if (!selectedCompanyId) {
    return <EmptyState icon={Hexagon} message="Select a company to view projects." />;
  }

  return (
    <div className="space-y-4">
      <div className="flex items-center justify-between">
        <h2 className="text-lg font-semibold">Projects</h2>
        <Button size="sm" onClick={openNewProject}>
          <Plus className="h-4 w-4 mr-1" />
          Add Project
        </Button>
      </div>

      {loading && <p className="text-sm text-muted-foreground">Loading...</p>}
      {error && <p className="text-sm text-destructive">{error.message}</p>}

      {projects && projects.length === 0 && (
        <EmptyState
          icon={Hexagon}
          message="No projects yet."
          action="Add Project"
          onAction={openNewProject}
        />
      )}

      {projects && projects.length > 0 && (
        <div className="border border-border rounded-md">
          {projects.map((project) => (
            <EntityRow
              key={project.id}
              title={project.name}
              subtitle={project.description ?? undefined}
              onClick={() => navigate(`/projects/${project.id}`)}
              trailing={
                <div className="flex items-center gap-3">
                  {project.targetDate && (
                    <span className="text-xs text-muted-foreground">
                      {formatDate(project.targetDate)}
                    </span>
                  )}
                  <StatusBadge status={project.status} />
                </div>
              }
            />
          ))}
        </div>
      )}
    </div>
  );
}