"use client";
import useSWR from "swr";
import { useState, useRef } from "react";
import { Modal } from "@/app/components/ui/Modal";

const fetcher = (url: string) => fetch(url).then((r) => r.json());

export default function AdminPartnersPage() {
  const { data, mutate } = useSWR<{ partners: any[] }>("/api/admin/partners", fetcher);
  const { data: catData, mutate: mutateCategories } = useSWR<{ categories: any[] }>("/api/admin/partner-categories", fetcher);
  const partners = data?.partners ?? [];
  const categories = catData?.categories ?? [];
  const [form, setForm] = useState({ name: "", latitude: "", longitude: "", address: "", imageUrl: "", categoryId: "" });
  const [uploading, setUploading] = useState(false);
  const fileInputRef = useRef<HTMLInputElement>(null);
  const editFileInputRef = useRef<HTMLInputElement>(null);
  const [editUploading, setEditUploading] = useState(false);
  const [editingId, setEditingId] = useState<string | null>(null);
  const [editDraft, setEditDraft] = useState<any>(null);
  const [showCreateModal, setShowCreateModal] = useState(false);
  const [showEditModal, setShowEditModal] = useState(false);

  async function onSelectFile(e: React.ChangeEvent<HTMLInputElement>) {
    const inputEl = e.currentTarget;
    const file = inputEl.files?.[0];
    if (!file) return;
    try {
      setUploading(true);
      const fd = new FormData();
      fd.append("file", file);
      const r = await fetch("/api/uploads", { method: "POST", body: fd });
      const json = await r.json();
      if (!r.ok) throw new Error(json?.error || "upload_failed");
      setForm((f) => ({ ...f, imageUrl: json.url }));
    } catch (err) {
      console.error(err);
      alert("이미지 업로드 중 오류가 발생했습니다.");
    } finally {
      setUploading(false);
      if (inputEl) inputEl.value = "";
    }
  }

  async function onSelectEditFile(e: React.ChangeEvent<HTMLInputElement>) {
    const inputEl = e.currentTarget;
    const file = inputEl.files?.[0];
    if (!file) return;
    try {
      setEditUploading(true);
      const fd = new FormData();
      fd.append("file", file);
      const r = await fetch("/api/uploads", { method: "POST", body: fd });
      const json = await r.json();
      if (!r.ok) throw new Error(json?.error || "upload_failed");
      setEditDraft((d: any) => ({ ...(d || {}), imageUrl: json.url }));
    } catch (err) {
      console.error(err);
      alert("이미지 업로드 중 오류가 발생했습니다.");
    } finally {
      setEditUploading(false);
      if (inputEl) inputEl.value = "";
    }
  }

  async function create() {
    // 필수값 검증: 이름/카테고리/위도/경도
    if (!form.name || !form.categoryId || !String(form.latitude).trim() || !String(form.longitude).trim()) {
      alert("이름, 카테고리, 위도, 경도를 모두 선택/입력해 주세요.");
      return;
    }
    const lat = Number(form.latitude);
    const lon = Number(form.longitude);
    if (!isFinite(lat) || !isFinite(lon)) {
      alert("위도/경도는 숫자여야 합니다.");
      return;
    }
    const payload = { ...form, latitude: lat, longitude: lon, categoryId: form.categoryId } as any;
    const r = await fetch("/api/admin/partners", { method: "POST", headers: { "content-type": "application/json" }, body: JSON.stringify(payload) });
    if (r.ok) {
      setForm({ name: "", latitude: "", longitude: "", address: "", imageUrl: "", categoryId: "" });
      mutate();
      setShowCreateModal(false);
    } else {
      let msg = "저장에 실패했습니다.";
      try {
        const j = await r.json();
        msg = j?.message || j?.error || msg;
        if (r.status === 409 && j?.error === "duplicate_name") msg = "이미 존재하는 업체명입니다.";
        if (r.status === 400) msg = msg || "입력값을 확인해 주세요.";
      } catch {}
      alert(msg);
    }
  }

  return (
    <div>
      <div style={{ display: "flex", alignItems: "center", justifyContent: "space-between", marginBottom: 12 }}>
        <h1>제휴업체 관리</h1>
        <button
          type="button"
          onClick={() => setShowCreateModal(true)}
          className="h-9 px-4 rounded-md bg-neutral-900 text-white text-sm shadow cursor-pointer hover:bg-neutral-800 active:translate-y-px transition"
        >
          추가
        </button>
      </div>
      <Modal open={showCreateModal} onClose={() => setShowCreateModal(false)}>
        <div className="w-[720px] max-w-[90vw]">
          <div className="p-6">
            <h2 className="text-lg font-bold mb-4">제휴업체 추가</h2>
            {(() => {
              const inputStyle: React.CSSProperties = { border: "1px solid #ddd", borderRadius: 6, padding: "8px 10px", width: "100%" };
              return (
                <div style={{ display: "grid", gridTemplateColumns: "repeat(6, minmax(0, 1fr))", gap: 12, alignItems: "end" }}>
                  <div style={{ gridColumn: "span 3" }}>
                    <label style={{ display: "block", fontSize: 12, fontWeight: 600, marginBottom: 6 }}>이름</label>
                    <input style={inputStyle} value={form.name} onChange={(e) => setForm({ ...form, name: e.target.value })} />
                  </div>
                  <div style={{ gridColumn: "span 3" }}>
                    <label style={{ display: "block", fontSize: 12, fontWeight: 600, marginBottom: 6 }}>카테고리</label>
                    <select style={inputStyle} value={form.categoryId} onChange={(e) => setForm({ ...form, categoryId: e.target.value })}>
                      <option value="">(없음)</option>
                      {categories.map((c: any) => (
                        <option key={c.id} value={c.id}>{c.name}</option>
                      ))}
                    </select>
                  </div>
                  <div style={{ gridColumn: "span 3" }}>
                    <label style={{ display: "block", fontSize: 12, fontWeight: 600, marginBottom: 6 }}>위도</label>
                    <input style={inputStyle} value={form.latitude} onChange={(e) => setForm({ ...form, latitude: e.target.value })} />
                  </div>
                  <div style={{ gridColumn: "span 3" }}>
                    <label style={{ display: "block", fontSize: 12, fontWeight: 600, marginBottom: 6 }}>경도</label>
                    <input style={inputStyle} value={form.longitude} onChange={(e) => setForm({ ...form, longitude: e.target.value })} />
                  </div>
                  <div style={{ gridColumn: "span 6" }}>
                    <label style={{ display: "block", fontSize: 12, fontWeight: 600, marginBottom: 6 }}>이미지 URL</label>
                    <div style={{ display: "flex", gap: 8, alignItems: "center" }}>
                      <input style={inputStyle} value={form.imageUrl} onChange={(e) => setForm({ ...form, imageUrl: e.target.value })} />
                      <button
                        type="button"
                        onClick={() => fileInputRef.current?.click()}
                        disabled={uploading}
                        className="h-9 px-4 w-36 rounded-md border border-neutral-300 text-sm cursor-pointer hover:bg-neutral-100 hover:border-neutral-400 active:translate-y-px transition"
                      >
                        업로드
                      </button>
                      <input ref={fileInputRef} type="file" accept="image/*" onChange={onSelectFile} style={{ display: "none" }} />
                      {uploading && <span style={{ fontSize: 12, opacity: .7 }}>업로드 중...</span>}
                    </div>
                  </div>
                  <div style={{ gridColumn: "span 6" }}>
                    <label style={{ display: "block", fontSize: 12, fontWeight: 600, marginBottom: 6 }}>주소(선택)</label>
                    <input style={inputStyle} value={form.address} onChange={(e) => setForm({ ...form, address: e.target.value })} />
                  </div>
                  {form.imageUrl && (
                    <div style={{ gridColumn: "span 6" }}>
                      <div style={{ fontSize: 12, opacity: .7, marginBottom: 6 }}>미리보기</div>
                      <img src={form.imageUrl} alt="미리보기" style={{ width: 240, height: 120, objectFit: "cover", borderRadius: 6, border: "1px solid #eee" }} />
                    </div>
                  )}
                  <div style={{ gridColumn: "span 6", display: "flex", justifyContent: "flex-end", gap: 8 }}>
                    <button
                      onClick={create}
                      className="h-9 px-4 rounded-md bg-neutral-900 text-white text-sm shadow cursor-pointer hover:bg-neutral-800 active:translate-y-px transition"
                    >
                      저장
                    </button>
                    <button
                      type="button"
                      onClick={() => setShowCreateModal(false)}
                      className="h-9 px-4 rounded-md border border-neutral-300 text-sm cursor-pointer hover:bg-neutral-100 active:translate-y-px transition"
                    >
                      취소
                    </button>
                  </div>
                </div>
              );
            })()}
          </div>
        </div>
      </Modal>
      <Modal open={showEditModal} onClose={() => { setShowEditModal(false); setEditingId(null); setEditDraft(null); }}>
        <div className="w-[720px] max-w-[90vw]">
          <div className="p-6">
            <h2 className="text-lg font-bold mb-4">제휴업체 수정</h2>
            {(() => {
              const inputStyle: React.CSSProperties = { border: "1px solid #ddd", borderRadius: 6, padding: "8px 10px", width: "100%" };
              return (
                <div style={{ display: "grid", gridTemplateColumns: "repeat(6, minmax(0, 1fr))", gap: 12, alignItems: "end" }}>
                  <div style={{ gridColumn: "span 3" }}>
                    <label style={{ display: "block", fontSize: 12, fontWeight: 600, marginBottom: 6 }}>이름</label>
                    <input style={inputStyle} value={editDraft?.name ?? ""} onChange={(e) => setEditDraft({ ...editDraft, name: e.target.value })} />
                  </div>
                  <div style={{ gridColumn: "span 3" }}>
                    <label style={{ display: "block", fontSize: 12, fontWeight: 600, marginBottom: 6 }}>카테고리</label>
                    <select style={inputStyle} value={editDraft?.categoryId ?? ""} onChange={(e) => setEditDraft({ ...editDraft, categoryId: e.target.value })}>
                      <option value="">(없음)</option>
                      {categories.map((c: any) => (
                        <option key={c.id} value={c.id}>{c.name}</option>
                      ))}
                    </select>
                  </div>
                  <div style={{ gridColumn: "span 3" }}>
                    <label style={{ display: "block", fontSize: 12, fontWeight: 600, marginBottom: 6 }}>위도</label>
                    <input style={inputStyle} value={editDraft?.latitude ?? ""} onChange={(e) => setEditDraft({ ...editDraft, latitude: e.target.value })} />
                  </div>
                  <div style={{ gridColumn: "span 3" }}>
                    <label style={{ display: "block", fontSize: 12, fontWeight: 600, marginBottom: 6 }}>경도</label>
                    <input style={inputStyle} value={editDraft?.longitude ?? ""} onChange={(e) => setEditDraft({ ...editDraft, longitude: e.target.value })} />
                  </div>
                  <div style={{ gridColumn: "span 6" }}>
                    <label style={{ display: "block", fontSize: 12, fontWeight: 600, marginBottom: 6 }}>이미지 URL</label>
                    <div style={{ display: "flex", gap: 8, alignItems: "center" }}>
                      <input style={inputStyle} value={editDraft?.imageUrl ?? ""} onChange={(e) => setEditDraft({ ...editDraft, imageUrl: e.target.value })} />
                      <button
                        type="button"
                        onClick={() => editFileInputRef.current?.click()}
                        disabled={editUploading}
                        className="h-9 px-4 w-36 rounded-md border border-neutral-300 text-sm cursor-pointer hover:bg-neutral-100 hover:border-neutral-400 active:translate-y-px transition"
                      >
                        업로드
                      </button>
                      <input ref={editFileInputRef} type="file" accept="image/*" onChange={onSelectEditFile} style={{ display: "none" }} />
                      {editUploading && <span style={{ fontSize: 12, opacity: .7 }}>업로드 중...</span>}
                    </div>
                  </div>
                  <div style={{ gridColumn: "span 6" }}>
                    <label style={{ display: "block", fontSize: 12, fontWeight: 600, marginBottom: 6 }}>주소</label>
                    <input style={inputStyle} value={editDraft?.address ?? ""} onChange={(e) => setEditDraft({ ...editDraft, address: e.target.value })} />
                  </div>
                  {editDraft?.imageUrl && (
                    <div style={{ gridColumn: "span 6" }}>
                      <div style={{ fontSize: 12, opacity: .7, marginBottom: 6 }}>미리보기</div>
                      <img src={editDraft.imageUrl} alt="미리보기" style={{ width: 240, height: 120, objectFit: "cover", borderRadius: 6, border: "1px solid #eee" }} />
                    </div>
                  )}
                  <div style={{ gridColumn: "span 6", display: "flex", justifyContent: "flex-end", gap: 8 }}>
                    <button
                      onClick={async () => {
                        if (!editingId) return;
                        const resp = await fetch(`/api/admin/partners/${editingId}`, { method: "PATCH", headers: { "content-type": "application/json" }, body: JSON.stringify({ ...editDraft, categoryId: (editDraft?.categoryId || null) }) });
                        if (!resp.ok) {
                          let msg = "저장에 실패했습니다.";
                          try {
                            const j = await resp.json();
                            msg = j?.message || j?.error || msg;
                          } catch {}
                          alert(msg);
                          return;
                        }
                        setEditingId(null);
                        setEditDraft(null);
                        setShowEditModal(false);
                        mutate();
                      }}
                      className="h-9 px-4 rounded-md bg-neutral-900 text-white text-sm shadow cursor-pointer hover:bg-neutral-800 active:translate-y-px transition"
                    >
                      저장
                    </button>
                    <button
                      type="button"
                      onClick={() => { setShowEditModal(false); setEditingId(null); setEditDraft(null); }}
                      className="h-9 px-4 rounded-md border border-neutral-300 text-sm cursor-pointer hover:bg-neutral-100 active:translate-y-px transition"
                    >
                      취소
                    </button>
                  </div>
                </div>
              );
            })()}
          </div>
        </div>
      </Modal>
      <ul style={{ display: "flex", flexDirection: "column", gap: 8 }}>
        {partners.map((p) => (
          <li key={p.id} style={{ border: "1px solid #eee", borderRadius: 8, padding: 12, display: "grid", gridTemplateColumns: "auto 1fr 1fr 1fr auto", gap: 8, alignItems: "center" }}>
            <div style={{ width: 80 }}>
              {p.imageUrl ? (
                <img src={p.imageUrl} alt={p.name} style={{ width: 80, height: 48, objectFit: "cover", borderRadius: 6 }} />
              ) : (
                <div style={{ width: 80, height: 48, border: "1px solid #eee", borderRadius: 6, background: "#fafafa" }} />
              )}
            </div>
            {false ? (
              <></>
            ) : (
              <>
                <div>
                  <div><strong>{p.name}</strong> {p.categoryRef ? <span style={{ marginLeft: 6, fontSize: 12, opacity: .7 }}>[{p.categoryRef.name}]</span> : null}</div>
                  <div style={{ fontSize: 12, opacity: .7 }}>{p.address || "(주소 없음)"}</div>
                </div>
                <div style={{ fontSize: 12, opacity: .7 }}>위도 {p.latitude}</div>
                <div style={{ fontSize: 12, opacity: .7 }}>경도 {p.longitude}</div>
                <div style={{ display: "flex", gap: 8, justifyContent: "flex-end" }}>
                  <button
                    onClick={() => { setEditingId(p.id); setEditDraft({ name: p.name, categoryId: p.categoryId ?? "", latitude: String(p.latitude), longitude: String(p.longitude), address: p.address ?? "", imageUrl: p.imageUrl ?? "", sortOrder: p.sortOrder ?? 0 }); setShowEditModal(true); }}
                    className="h-8 px-3 rounded-md border border-neutral-300 text-sm cursor-pointer hover:bg-neutral-100 active:translate-y-px transition"
                  >
                    수정
                  </button>
                  <button
                    onClick={async () => { await fetch(`/api/admin/partners/${p.id}`, { method: "DELETE" }); mutate(); }}
                    className="h-8 px-3 rounded-md border border-red-200 text-red-600 text-sm cursor-pointer hover:bg-red-100 hover:border-red-300 hover:text-red-700 active:translate-y-px transition"
                  >
                    삭제
                  </button>
                  <button
                    title="위로"
                    onClick={async () => { await fetch(`/api/admin/partners/${p.id}`, { method: "PATCH", headers: { "content-type": "application/json" }, body: JSON.stringify({ sortOrder: (p.sortOrder ?? 0) - 1 }) }); mutate(); }}
                    className="h-8 px-3 rounded-md border border-neutral-300 text-sm cursor-pointer hover:bg-neutral-100 active:translate-y-px transition"
                  >
                    ↑
                  </button>
                  <button
                    title="아래로"
                    onClick={async () => { await fetch(`/api/admin/partners/${p.id}`, { method: "PATCH", headers: { "content-type": "application/json" }, body: JSON.stringify({ sortOrder: (p.sortOrder ?? 0) + 1 }) }); mutate(); }}
                    className="h-8 px-3 rounded-md border border-neutral-300 text-sm cursor-pointer hover:bg-neutral-100 active:translate-y-px transition"
                  >
                    ↓
                  </button>
                </div>
              </>
            )}
          </li>
        ))}
      </ul>
    <div>
      <hr style={{ margin: "24px 0" }} />
      <h2 className="text-lg font-bold mb-2">카테고리 관리</h2>
      <CategoryManager categories={categories} onChanged={mutateCategories} />
    </div>
    </div>
  );
}


function CategoryManager({ categories, onChanged }: { categories: any[]; onChanged: () => void }) {
  const [name, setName] = useState("");
  return (
    <div className="border border-neutral-200 rounded-lg p-3">
      <div className="flex items-center gap-2 mb-3">
        <input
          placeholder="카테고리 이름"
          value={name}
          onChange={(e) => setName(e.target.value)}
          className="h-9 px-3 rounded-md border border-neutral-300 flex-1"
        />
        <button
          onClick={async () => { if (!name.trim()) return; const r = await fetch("/api/admin/partner-categories", { method: "POST", headers: { "content-type": "application/json" }, body: JSON.stringify({ name: name.trim() }) }); if (r.ok) { setName(""); onChanged(); } else { try { const j = await r.json(); alert(j?.message || j?.error || "생성 실패"); } catch { alert("생성 실패"); } } }}
          className="h-9 px-4 rounded-md bg-neutral-900 text-white text-sm cursor-pointer hover:bg-neutral-800 active:translate-y-px transition"
        >
          추가
        </button>
      </div>
      <ul className="flex flex-wrap gap-2">
        {categories.map((c: any) => (
          <li key={c.id} className="flex items-center gap-2 px-2 py-1 rounded-full border border-neutral-300 text-sm">
            <span>{c.name}</span>
            <button
              title="삭제"
              onClick={async () => { const r = await fetch(`/api/admin/partner-categories/${c.id}`, { method: "DELETE" }); if (r.ok) onChanged(); else { try { const j = await r.json(); alert(j?.message || j?.error || "삭제 실패"); } catch { alert("삭제 실패"); } } }}
              className="px-2 h-6 rounded-md border border-red-200 text-red-600 hover:bg-red-100 hover:border-red-300 hover:text-red-700"
            >
              삭제
            </button>
          </li>
        ))}
      </ul>
    </div>
  );
}