import { UserX } from "lucide-react"

import { getStudentClasses } from "@/modules/classes/data-access"
import { getCurrentStudentUser } from "@/modules/users/data-access"
import { StudentCoursesView } from "@/modules/student/components/student-courses-view"
import { CourseFilters } from "@/modules/student/components/course-filters"
import { EmptyState } from "@/shared/components/ui/empty-state"

export const dynamic = "force-dynamic"

type SearchParams = { [key: string]: string | string[] | undefined }

const getParam = (params: SearchParams, key: string) => {
  const v = params[key]
  return Array.isArray(v) ? v[0] : v
}

export default async function StudentCoursesPage({
  searchParams,
}: {
  searchParams: Promise<SearchParams>
}) {
  const student = await getCurrentStudentUser()
  if (!student) {
    return (
      <div className="space-y-8">
        <div>
          <h2 className="text-2xl font-bold tracking-tight">Courses</h2>
          <p className="text-muted-foreground">Your enrolled classes.</p>
        </div>
        <EmptyState
          title="No user found"
          description="Create a student user to see courses."
          icon={UserX}
        />
      </div>
    )
  }

  const [sp, classes] = await Promise.all([
    searchParams,
    getStudentClasses(student.id),
  ])

  const q = (getParam(sp, "q") || "").toLowerCase().trim()
  const filteredClasses = q
    ? classes.filter((c) => {
        return (
          c.name.toLowerCase().includes(q) ||
          (c.teacherName?.toLowerCase().includes(q) ?? false) ||
          (c.schoolName?.toLowerCase().includes(q) ?? false) ||
          (c.homeroom?.toLowerCase().includes(q) ?? false)
        )
      })
    : classes

  return (
    <div className="space-y-8">
      <div>
        <h2 className="text-2xl font-bold tracking-tight">Courses</h2>
        <p className="text-muted-foreground">Your enrolled classes.</p>
      </div>
      {classes.length > 0 && <CourseFilters />}
      <StudentCoursesView classes={filteredClasses} />
    </div>
  )
}
