// 自由创作·人物素材库弹窗:组网格 → 组内素材列表(审核状态徽章)→ 建组/传素材/改名/删除;
// 选中 active 素材注入输入条(source=library,生成时后端换 asset:// 引用)。
// processing 素材每 8s 轮询火山刷新状态(与基础资产送审轮询同节奏)。
import { useCallback, useEffect, useRef, useState } from "react";
import { createPortal } from "react-dom";
import { ChevronLeft, FolderPlus, Pencil, Trash2, Upload, Users, X } from "lucide-react";
import { api } from "../../api";
import type { FreeAssetGroup, FreeAssetItem, FreeVideoRef } from "../../types";
import { useBodyScrollLock } from "../overlays";

const STATUS_PILL: Record<FreeAssetItem["status"], { cls: string; label: string }> = {
  processing: { cls: "pill-info", label: "审核中" },
  active: { cls: "pill-ok", label: "可用" },
  failed: { cls: "pill-err", label: "未通过" }
};

export function AssetLibraryModal({ open, onClose, onPick, notify }: {
  open: boolean;
  onClose: () => void;
  onPick: (ref: FreeVideoRef) => void;
  notify: (type: "success" | "error" | "info", text: string) => void;
}) {
  const [groups, setGroups] = useState<FreeAssetGroup[]>([]);
  const [activeGroup, setActiveGroup] = useState<FreeAssetGroup | null>(null);
  const [assets, setAssets] = useState<FreeAssetItem[]>([]);
  const [loading, setLoading] = useState(false);
  const [creating, setCreating] = useState(false);
  const [newName, setNewName] = useState("");
  const [uploading, setUploading] = useState(false);
  const [quickUploading, setQuickUploading] = useState(false);
  const fileRef = useRef<HTMLInputElement>(null);
  const quickFileRef = useRef<HTMLInputElement>(null);
  useBodyScrollLock(open);

  const loadGroups = useCallback(async () => {
    setLoading(true);
    try {
      const data = await api.freeAssetGroups();
      setGroups(data.results);
    } catch (error) {
      notify("error", error instanceof Error ? error.message : "素材组加载失败");
    } finally {
      setLoading(false);
    }
  }, [notify]);

  const loadGroupDetail = useCallback(async (group: FreeAssetGroup) => {
    setLoading(true);
    try {
      const data = await api.freeAssetGroup(group.id);
      setActiveGroup(data.group);
      setAssets(data.assets);
    } catch (error) {
      notify("error", error instanceof Error ? error.message : "素材加载失败");
    } finally {
      setLoading(false);
    }
  }, [notify]);

  useEffect(() => {
    if (!open) return;
    setActiveGroup(null);
    setAssets([]);
    void loadGroups();
  }, [open, loadGroups]);

  // processing 素材每 8s 轮询刷新
  useEffect(() => {
    if (!open || !activeGroup) return;
    const pending = assets.filter((a) => a.status === "processing");
    if (pending.length === 0) return;
    const timer = window.setInterval(() => {
      pending.forEach((item) => {
        void api.pollFreeAsset(item.id).then((data) => {
          setAssets((prev) => prev.map((a) => (a.id === data.asset.id ? data.asset : a)));
        }).catch(() => undefined);
      });
    }, 8000);
    return () => window.clearInterval(timer);
  }, [open, activeGroup, assets]);

  if (!open) return null;

  const createGroup = async () => {
    const name = newName.trim();
    if (!name) return;
    try {
      const data = await api.createFreeAssetGroup({ name });
      setGroups((prev) => [data.group, ...prev]);
      setCreating(false);
      setNewName("");
      notify("success", `素材组「${name}」已创建`);
    } catch (error) {
      notify("error", error instanceof Error ? error.message : "创建失败");
    }
  };

  const uploadAsset = async (file: File) => {
    if (!activeGroup) return;
    setUploading(true);
    try {
      const form = new FormData();
      form.append("file", file);
      const data = await api.uploadFreeAsset(activeGroup.id, form);
      setAssets((prev) => [data.asset, ...prev]);
      notify("success", "素材已上传,审核中");
    } catch (error) {
      notify("error", error instanceof Error ? error.message : "上传失败");
    } finally {
      setUploading(false);
    }
  };

  const quickUploadImage = async (file: File) => {
    setQuickUploading(true);
    try {
      const form = new FormData();
      form.append("file", file);
      const data = await api.quickUploadFreeAsset(form);
      setActiveGroup(data.group);
      setAssets([data.asset]);
      notify("success", "图片已上传到默认素材组,审核中");
      void loadGroupDetail(data.group);
    } catch (error) {
      notify("error", error instanceof Error ? error.message : "上传失败");
    } finally {
      setQuickUploading(false);
    }
  };

  const renameAsset = async (item: FreeAssetItem) => {
    const name = window.prompt("素材名称(用于 @ 引用)", item.name);
    if (!name || name.trim() === item.name) return;
    try {
      const data = await api.renameFreeAsset(item.id, name.trim());
      setAssets((prev) => prev.map((a) => (a.id === item.id ? data.asset : a)));
    } catch (error) {
      notify("error", error instanceof Error ? error.message : "重命名失败");
    }
  };

  const removeAsset = async (item: FreeAssetItem) => {
    if (!window.confirm(`删除素材「${item.name}」?`)) return;
    try {
      await api.deleteFreeAsset(item.id);
      setAssets((prev) => prev.filter((a) => a.id !== item.id));
    } catch (error) {
      notify("error", error instanceof Error ? error.message : "删除失败");
    }
  };

  const renameGroup = async (group: FreeAssetGroup) => {
    const name = window.prompt("素材组名称", group.name);
    if (!name || name.trim() === group.name) return;
    try {
      const data = await api.updateFreeAssetGroup(group.id, { name: name.trim() });
      setGroups((prev) => prev.map((g) => (g.id === group.id ? data.group : g)));
      if (activeGroup?.id === group.id) setActiveGroup(data.group);
    } catch (error) {
      notify("error", error instanceof Error ? error.message : "重命名失败");
    }
  };

  const removeGroup = async (group: FreeAssetGroup) => {
    if (!window.confirm(`删除素材组「${group.name}」及其全部素材?此操作不可恢复。`)) return;
    try {
      await api.deleteFreeAssetGroup(group.id);
      setGroups((prev) => prev.filter((g) => g.id !== group.id));
      if (activeGroup?.id === group.id) { setActiveGroup(null); setAssets([]); }
      notify("success", "素材组已删除");
    } catch (error) {
      notify("error", error instanceof Error ? error.message : "删除失败");
    }
  };

  const pick = (item: FreeAssetItem) => {
    if (item.status !== "active") {
      notify("info", item.status === "processing" ? "素材还在审核中,请稍候" : "素材未通过审核,无法引用");
      return;
    }
    onPick({
      url: item.url,
      type: item.type,
      label: item.name,
      thumb_url: item.thumb_url,
      duration: item.duration || undefined,
      asset_id: item.id,
      source: "library"
    });
    onClose();
  };

  return createPortal(
    <div className="modal-bg show" onClick={onClose}>
      <div className="modal fc-lib-modal" onClick={(event) => event.stopPropagation()}>
        <span className="corner-tr">+</span><span className="corner-bl">+</span>
        <div className="modal-h">
          <div className="ic-m"><Users size={16} /></div>
          <div className="ti">
            {activeGroup ? (
              <button type="button" className="fc-lib-back" onClick={() => { setActiveGroup(null); setAssets([]); void loadGroups(); }}>
                <ChevronLeft size={14} /> {activeGroup.name}
              </button>
            ) : "人物素材库"}
            <span>// 火山素材登记 · @ 引用生成</span>
          </div>
          <button className="x modal-x" type="button" onClick={onClose} aria-label="关闭"><X size={14} /></button>
        </div>
        <div className="modal-b fc-lib-body">
          {!activeGroup ? (
            <>
              <div className="fc-lib-toolbar">
                <input
                  ref={quickFileRef}
                  type="file"
                  hidden
                  accept="image/jpeg,image/png,image/webp"
                  onChange={(event) => {
                    const file = event.target.files?.[0];
                    event.target.value = "";
                    if (file) void quickUploadImage(file);
                  }}
                />
                {creating ? (
                  <div className="fc-lib-create">
                    <input
                      className="input"
                      autoFocus
                      placeholder="素材组名称(如:碧碧)"
                      value={newName}
                      onChange={(event) => setNewName(event.target.value)}
                      onKeyDown={(event) => { if (event.key === "Enter") void createGroup(); if (event.key === "Escape") setCreating(false); }}
                    />
                    <button type="button" className="btn btn-sm btn-primary" onClick={() => void createGroup()}>创建</button>
                    <button type="button" className="btn btn-sm btn-ghost" onClick={() => setCreating(false)}>取消</button>
                  </div>
                ) : (
                  <>
                    <button type="button" className="btn btn-sm btn-primary" disabled={quickUploading} onClick={() => quickFileRef.current?.click()}>
                      <Upload size={13} /> {quickUploading ? "上传中…" : "上传图片"}
                    </button>
                    <button type="button" className="btn btn-sm" onClick={() => setCreating(true)}><FolderPlus size={13} /> 新建素材组</button>
                    <span className="mono fc-lib-hint">// 自动进入默认素材组审核</span>
                  </>
                )}
              </div>
              {groups.length === 0 && !loading ? (
                <div className="empty-state show">
                  <span className="ic-empty"><Users size={22} strokeWidth={1.5} /></span>
                  <h3>还没有素材组</h3>
                  <p>// 一个角色一组:登记后可在提示词里 @ 引用,规避真人脸拦截</p>
                </div>
              ) : (
                <div className="fc-lib-groups">
                  {groups.map((group) => (
                    <div key={group.id} className="fc-lib-group" role="button" tabIndex={0} onClick={() => void loadGroupDetail(group)} onKeyDown={(event) => { if (event.key === "Enter") void loadGroupDetail(group); }}>
                      <div className="fc-lib-thumb">
                        {group.thumbnail_url ? <img src={group.thumbnail_url} alt={group.name} /> : <Users size={20} />}
                      </div>
                      <div className="fc-lib-name">{group.name}</div>
                      <div className="fc-lib-count mono">// {group.asset_count} 个素材</div>
                      <div className="fc-lib-ops">
                        <button type="button" title="重命名" onClick={(event) => { event.stopPropagation(); void renameGroup(group); }}><Pencil size={12} /></button>
                        <button type="button" title="删除" onClick={(event) => { event.stopPropagation(); void removeGroup(group); }}><Trash2 size={12} /></button>
                      </div>
                    </div>
                  ))}
                </div>
              )}
            </>
          ) : (
            <>
              <div className="fc-lib-toolbar">
                <input
                  ref={fileRef}
                  type="file"
                  hidden
                  accept="image/jpeg,image/png,image/webp,video/mp4,video/quicktime,audio/mpeg,audio/wav"
                  onChange={(event) => {
                    const file = event.target.files?.[0];
                    event.target.value = "";
                    if (file) void uploadAsset(file);
                  }}
                />
                <button type="button" className="btn btn-sm" disabled={uploading} onClick={() => fileRef.current?.click()}>
                  <Upload size={13} /> {uploading ? "上传中…" : "上传素材"}
                </button>
                <span className="mono fc-lib-hint">// 审核通过(可用)后才能被生成引用</span>
              </div>
              {assets.length === 0 && !loading ? (
                <div className="empty-state show">
                  <span className="ic-empty"><Upload size={22} strokeWidth={1.5} /></span>
                  <h3>组内还没有素材</h3>
                  <p>// 上传该角色的图片/视频/音频</p>
                </div>
              ) : (
                <div className="fc-lib-assets">
                  {assets.map((item) => {
                    const pill = STATUS_PILL[item.status];
                    return (
                      <div key={item.id} className={`fc-lib-asset${item.status === "active" ? " pickable" : ""}`} role="button" tabIndex={0} onClick={() => pick(item)} onKeyDown={(event) => { if (event.key === "Enter") pick(item); }}>
                        <div className="fc-lib-thumb">
                          {item.thumb_url ? <img src={item.thumb_url} alt={item.name} /> : <span className="mono">{item.type === "audio" ? "♪" : item.type.toUpperCase()}</span>}
                          {item.duration ? <span className="fc-ref-dur mono">{item.duration}s</span> : null}
                        </div>
                        <div className="fc-lib-name" title={item.name}>{item.name}</div>
                        <span className={`pill pill-l3 ${pill.cls}`}><span className="dot" />{pill.label}</span>
                        {item.status === "failed" && item.error_message && <div className="fc-lib-err mono" title={item.error_message}>// {item.error_message}</div>}
                        <div className="fc-lib-ops">
                          <button type="button" title="重命名" onClick={(event) => { event.stopPropagation(); void renameAsset(item); }}><Pencil size={12} /></button>
                          <button type="button" title="删除" onClick={(event) => { event.stopPropagation(); void removeAsset(item); }}><Trash2 size={12} /></button>
                        </div>
                      </div>
                    );
                  })}
                </div>
              )}
            </>
          )}
        </div>
      </div>
    </div>,
    document.body
  );
}