siftlode/frontend/src/components/Channels.tsx

import { useState } from "react";
import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
import {
  ArrowDown,
  ArrowUp,
  Eye,
  EyeOff,
  Plus,
  RefreshCw,
  Search,
  X,
} from "lucide-react";
import { api, type ManagedChannel, type Tag } from "../lib/api";
import { notify } from "../lib/notifications";

export default function Channels({
  onViewChannel,
}: {
  onViewChannel: (id: string, name: string) => void;
}) {
  const qc = useQueryClient();
  const channelsQuery = useQuery({ queryKey: ["channels"], queryFn: api.channels });
  const tagsQuery = useQuery({ queryKey: ["tags"], queryFn: api.tags });
  const statusQuery = useQuery({ queryKey: ["my-status"], queryFn: api.myStatus });
  const [q, setQ] = useState("");
  const [newTag, setNewTag] = useState("");

  const invalidate = () => {
    qc.invalidateQueries({ queryKey: ["channels"] });
    qc.invalidateQueries({ queryKey: ["tags"] });
    qc.invalidateQueries({ queryKey: ["my-status"] });
  };

  const userTags = (tagsQuery.data ?? []).filter((t) => !t.system);

  const patch = useMutation({
    mutationFn: (v: { id: string; body: { priority?: number; hidden?: boolean } }) =>
      api.updateChannel(v.id, v.body),
    onSuccess: () => qc.invalidateQueries({ queryKey: ["channels"] }),
  });
  const attach = useMutation({
    mutationFn: (v: { id: string; tagId: number }) => api.attachChannelTag(v.id, v.tagId),
    onSuccess: () => qc.invalidateQueries({ queryKey: ["channels"] }),
  });
  const detach = useMutation({
    mutationFn: (v: { id: string; tagId: number }) => api.detachChannelTag(v.id, v.tagId),
    onSuccess: () => qc.invalidateQueries({ queryKey: ["channels"] }),
  });
  const syncSubs = useMutation({
    mutationFn: () => api.syncSubscriptions(),
    onSuccess: (r: { subscriptions?: number }) => {
      invalidate();
      notify({ level: "success", message: `Synced ${r.subscriptions ?? 0} subscriptions` });
    },
    onError: () => notify({ level: "error", message: "Subscription sync failed" }),
  });
  const createTag = useMutation({
    mutationFn: (name: string) => api.createTag({ name, category: "other" }),
    onSuccess: () => {
      setNewTag("");
      qc.invalidateQueries({ queryKey: ["tags"] });
    },
  });
  const deleteTag = useMutation({
    mutationFn: (id: number) => api.deleteTag(id),
    onSuccess: () => invalidate(),
  });

  const channels = (channelsQuery.data ?? []).filter(
    (c) => !q || (c.title ?? "").toLowerCase().includes(q.toLowerCase())
  );
  const s = statusQuery.data;

  return (
    <div className="p-4 max-w-4xl mx-auto">
      {/* Per-user sync status */}
      {s && (
        <div className="flex flex-wrap items-center gap-x-5 gap-y-1 text-sm text-muted mb-4">
          <Stat label="Channels" value={s.channels_total} />
          <Stat label="Recent synced" value={`${s.channels_recent_synced}/${s.channels_total}`} />
          <Stat label="Full history" value={`${s.channels_deep_done}/${s.channels_total}`} />
          <Stat label="My videos" value={s.my_videos.toLocaleString()} />
          <Stat label="Quota left" value={s.quota_remaining_today.toLocaleString()} />
        </div>
      )}

      {/* Toolbar */}
      <div className="flex items-center gap-2 mb-4">
        <div className="relative flex-1">
          <Search className="w-4 h-4 absolute left-3 top-1/2 -translate-y-1/2 text-muted" />
          <input
            value={q}
            onChange={(e) => setQ(e.target.value)}
            placeholder="Filter channels…"
            className="w-full bg-card border border-border rounded-full pl-9 pr-4 py-2 text-sm outline-none focus:border-accent"
          />
        </div>
        <button
          onClick={() => syncSubs.mutate()}
          disabled={syncSubs.isPending}
          className="flex items-center gap-2 px-3 py-2 rounded-lg border border-border text-sm hover:border-accent disabled:opacity-50 transition"
        >
          <RefreshCw className={`w-4 h-4 ${syncSubs.isPending ? "animate-spin" : ""}`} />
          Sync subscriptions
        </button>
      </div>

      {/* Your tags */}
      <div className="flex flex-wrap items-center gap-1.5 mb-4">
        <span className="text-xs uppercase tracking-wide text-muted mr-1">Your tags</span>
        {userTags.map((t) => (
          <span
            key={t.id}
            className="inline-flex items-center gap-1 text-xs px-2 py-1 rounded-full bg-card border border-border"
          >
            {t.name}
            <button onClick={() => deleteTag.mutate(t.id)} className="text-muted hover:text-red-400">
              <X className="w-3 h-3" />
            </button>
          </span>
        ))}
        <form
          onSubmit={(e) => {
            e.preventDefault();
            if (newTag.trim()) createTag.mutate(newTag.trim());
          }}
          className="inline-flex items-center gap-1"
        >
          <input
            value={newTag}
            onChange={(e) => setNewTag(e.target.value)}
            placeholder="new tag"
            className="w-24 bg-card border border-border rounded-full px-2.5 py-1 text-xs outline-none focus:border-accent"
          />
          <button type="submit" className="text-muted hover:text-accent" title="Create tag">
            <Plus className="w-4 h-4" />
          </button>
        </form>
      </div>

      {/* Channel list */}
      {channelsQuery.isLoading ? (
        <div className="text-muted py-8">Loading channels…</div>
      ) : channels.length === 0 ? (
        <div className="text-muted py-8">No channels.</div>
      ) : (
        <div className="flex flex-col gap-1.5">
          {channels.map((c) => (
            <ChannelRow
              key={c.id}
              c={c}
              userTags={userTags}
              onView={() => onViewChannel(c.id, c.title ?? "This channel")}
              onPriority={(d) => patch.mutate({ id: c.id, body: { priority: c.priority + d } })}
              onHide={() => patch.mutate({ id: c.id, body: { hidden: !c.hidden } })}
              onToggleTag={(tagId) =>
                c.tag_ids.includes(tagId)
                  ? detach.mutate({ id: c.id, tagId })
                  : attach.mutate({ id: c.id, tagId })
              }
            />
          ))}
        </div>
      )}
    </div>
  );
}

function Stat({ label, value }: { label: string; value: string | number }) {
  return (
    <span>
      <span className="text-fg font-semibold">{value}</span> {label}
    </span>
  );
}

function SyncBadge({ ok, label }: { ok: boolean; label: string }) {
  return (
    <span
      className={`text-[10px] px-1.5 py-0.5 rounded-full border ${
        ok ? "border-accent/40 text-accent" : "border-border text-muted"
      }`}
    >
      {label}
    </span>
  );
}

function ChannelRow({
  c,
  userTags,
  onView,
  onPriority,
  onHide,
  onToggleTag,
}: {
  c: ManagedChannel;
  userTags: Tag[];
  onView: () => void;
  onPriority: (delta: number) => void;
  onHide: () => void;
  onToggleTag: (tagId: number) => void;
}) {
  return (
    <div
      className={`flex items-center gap-3 p-2.5 rounded-xl border border-border bg-card/30 ${
        c.hidden ? "opacity-60" : ""
      }`}
    >
      <div className="flex flex-col items-center">
        <button onClick={() => onPriority(1)} className="text-muted hover:text-accent" title="Raise priority">
          <ArrowUp className="w-3.5 h-3.5" />
        </button>
        <span className="text-xs text-muted tabular-nums">{c.priority}</span>
        <button onClick={() => onPriority(-1)} className="text-muted hover:text-accent" title="Lower priority">
          <ArrowDown className="w-3.5 h-3.5" />
        </button>
      </div>

      {c.thumbnail_url ? (
        <img src={c.thumbnail_url} alt="" className="w-10 h-10 rounded-full shrink-0" />
      ) : (
        <div className="w-10 h-10 rounded-full bg-card shrink-0" />
      )}

      <div className="min-w-0 flex-1">
        <button onClick={onView} className="text-sm font-semibold truncate hover:text-accent block max-w-full text-left">
          {c.title ?? c.id}
        </button>
        <div className="flex items-center gap-2 text-[11px] text-muted">
          <span>{c.stored_videos.toLocaleString()} stored</span>
          {c.subscriber_count != null && <span>· {c.subscriber_count.toLocaleString()} subs</span>}
        </div>
        <div className="flex flex-wrap items-center gap-1 mt-1">
          <SyncBadge ok={c.recent_synced} label="recent" />
          <SyncBadge ok={c.backfill_done} label="full" />
          {userTags.map((t) => {
            const on = c.tag_ids.includes(t.id);
            return (
              <button
                key={t.id}
                onClick={() => onToggleTag(t.id)}
                className={`text-[10px] px-1.5 py-0.5 rounded-full border transition ${
                  on
                    ? "bg-accent text-accent-fg border-accent"
                    : "bg-card border-border text-muted hover:border-accent"
                }`}
              >
                {t.name}
              </button>
            );
          })}
        </div>
      </div>

      <button onClick={onHide} className="text-muted hover:text-fg shrink-0" title={c.hidden ? "Unhide" : "Hide from feed"}>
        {c.hidden ? <EyeOff className="w-4 h-4" /> : <Eye className="w-4 h-4" />}
      </button>
    </div>
  );
}