// src/components/CollegeProfileList.js
import React, { useEffect, useState } from "react";
import { Link, useNavigate, useParams } from "react-router-dom";
import CareerSelectDropdown from "./CareerSelectDropdown.js";
import apiFetch from '../auth/apiFetch.js';

export default function CollegeProfileList() {
  const { careerId } = useParams();                // may be undefined
  const navigate = useNavigate();

  /* ───────── existing lists ───────── */
  const [rows, setRows] = useState([]);
  const [careerRows, setCareerRows] = useState([]);

  /* ───────── ui state ───────── */
  const [showPicker, setShowPicker] = useState(false);
  const [loadingCareers, setLoadingCareers] = useState(true);

  const authFetch = apiFetch;

  /* ───────── load college plans ───────── */
   /* ───────── load college plans ───────── */
  useEffect(() => {
    (async () => {
      try {
        const r = await authFetch("/api/premium/college-profile/all");
        if (!r.ok) throw new Error(`load college-profile/all → ${r.status}`);
        const d = await r.json();
        setRows(d.collegeProfiles || []);
      } catch (err) {
        console.error("College profiles load failed:", err);
        setRows([]);
      }
    })();
  }, []);

   /* ───────── load career profiles for the picker ───────── */
  useEffect(() => {
    (async () => {
      try {
        const res = await authFetch("/api/premium/career-profile/all");
        if (!res.ok) throw new Error(`load career-profile/all → ${res.status}`);
        const data = await res.json();
        setCareerRows(data.careerProfiles || []);
      } catch (err) {
        console.error("Career profiles load failed:", err);
      } finally {
        setLoadingCareers(false);
      }
    })();
  }, []);

  /* ───────── delete helper ───────── */
  async function handleDelete(row) {
    if (!window.confirm("Delete this college plan?")) return;
    try {
      const res = await authFetch(`/api/premium/college-profile/by-fields`, {
        method: "DELETE",
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          career_title   : row.career_title || null,
          selected_school: row.selected_school || null,
          selected_program: row.selected_program || null,
          created_at     : row.created_at || null  // optional disambiguator
        })
      });
       if (!res.ok) throw new Error(`delete failed → ${res.status}`);
      setRows((r) => r.filter(x =>
        !(
          (x.career_title||'')    === (row.career_title||'') &&
          (x.selected_school||'') === (row.selected_school||'') &&
          (x.selected_program||'')=== (row.selected_program||'') &&
          (x.created_at||'')      === (row.created_at||'')
        )
      ));
      if (!res.ok) throw new Error(`delete failed → ${res.status}`);
      setRows((r) => r.filter(x =>
        !(
          (x.career_title||'')    === (row.career_title||'') &&
          (x.selected_school||'') === (row.selected_school||'') &&
          (x.selected_program||'')=== (row.selected_program||'') &&
         (x.created_at||'')      === (row.created_at||'')
        )
      ));
    } catch (err) {
      console.error("Delete failed:", err);
      alert("Could not delete – see console.");
    }
  }


  return (
    <div className="max-w-5xl mx-auto space-y-6">
      {/* ───────── header row ───────── */}
      <div className="flex items-center justify-between">
        <h2 className="text-2xl font-semibold">College Plans</h2>

        {/* new‑plan button & inline picker */}
        {!showPicker ? (
          <button
            onClick={() => setShowPicker(true)}
            className="px-3 py-2 bg-blue-600 text-white rounded"
          >
            + New College Plan
          </button>
        ) : (
          <div className="p-4 border rounded bg-gray-50 max-w-md">
            <CareerSelectDropdown
              existingCareerProfiles={careerRows}
              selectedCareer={null}
              loading={loadingCareers}
              authFetch={authFetch}
              onChange={(careerObj) => {
                if (!careerObj) return;
                const title = careerObj.scenario_title || careerObj.career_name || '';
                const start = careerObj.start_date || '';
                navigate(`/profile/college/new?career=${encodeURIComponent(title)}&start=${encodeURIComponent(start)}`);
              }}
            />
            <div className="mt-2 text-right">
              <button
                onClick={() => setShowPicker(false)}
                className="text-sm text-gray-600 underline"
              >
                cancel
              </button>
            </div>
          </div>
        )}
      </div>

      {/* ───────── table of existing college plans ───────── */}
      <table className="w-full border text-sm">
        <thead className="bg-gray-100">
          <tr>
            <th className="p-2 text-left">Career</th>
            <th className="p-2 text-left">School</th>
            <th className="p-2 text-left">Program</th>
            <th className="p-2">Created</th>
            <th className="p-2"></th>
          </tr>
        </thead>

        <tbody>
          {rows.map((r) => (
            <tr key={`${r.career_title}|${r.selected_school}|${r.selected_program}|${r.created_at}`} className="border-t">
              <td className="p-2">{r.career_title}</td>
              <td className="p-2">{r.selected_school}</td>
              <td className="p-2">{r.selected_program}</td>
              <td className="p-2">{r.created_at?.slice(0, 10)}</td>
              <td className="p-2 space-x-2 whitespace-nowrap">
                <Link
                  to={`/profile/college/${encodeURIComponent(r.career_profile_id)}/edit`}
                  className="underline text-blue-600"
                >edit</Link>
                <button
                  onClick={() => handleDelete(r)}
                  className="underline text-red-600"
                >
                  delete
                </button>
              </td>
            </tr>
          ))}

          {rows.length === 0 && (
            <tr>
              <td colSpan={6} className="p-8 text-center text-gray-500">
                No college profiles yet.&nbsp;
                <button
                  className="text-blue-600 underline"
                  onClick={() =>
                    careerId
                      ? navigate(`/profile/college/${careerId}/new`)
                      : setShowPicker(true)
                  }
                >
                  Create one now.
                </button>
              </td>
            </tr>
          )}
        </tbody>
      </table>
    </div>
  );
}