import clsx from "clsx";
import { Bookmark, Check, ListPlus, MoreHorizontal, Play } from "lucide-react";
import { Reference, Sample } from "./labKit";
import { LAYER } from "./labTokens";
import { iconButtonClass } from "../components/ui/buttonStyles";
import { SURFACE } from "../components/ui/surfaces";

// Batch C, part 1 — action placement: the classification table (object × action → where it
// lives), DECIDED (owner, 2026-09-24: accepted as proposed). It is the source each object's
// ONE action list is built from. It applies
// the decided guard rails (DESIGN.md "Action placement"): ONE action list per object feeds every
// trigger; the primary action and visible state stay on the object; rare, secondary and destructive
// actions go to the menu; nothing is gesture-only, because the "…" button opens the same menu.

type Where = "rest" | "hover" | "menu";
type Row = {
  action: string;
  /** mouse: visible at rest / on hover / only in the menu (the menu always lists everything) */
  mouse: Where;
  /** touch card / row: visible, or reached through "…" */
  touch: "visible" | "…";
  /** what changes against today's actions, empty when nothing does */
  change?: string;
  danger?: boolean;
};
type Group = { object: string; rows: Row[] };

const TABLE: Group[] = [
  {
    object: "Video card (feed grid and list rows, Home shelves)",
    rows: [
      {
        action: "Play / continue",
        mouse: "rest",
        touch: "visible",
        change:
          "the thumbnail plays; the title is a link-styled element that ignores a click ending a text selection",
      },
      { action: "Open channel", mouse: "rest", touch: "visible" },
      {
        action: "Watched (toggle)",
        mouse: "hover",
        touch: "…",
        change: "the watched / progress STATE stays visible at rest",
      },
      { action: "Save (watch later)", mouse: "hover", touch: "…" },
      {
        action: "Add to playlist",
        mouse: "hover",
        touch: "…",
        change: "today hover only, not in the menu",
      },
      {
        action: "Download",
        mouse: "menu",
        touch: "…",
        change: "today hover only, not in the menu",
      },
      {
        action: "Details (ⓘ)",
        mouse: "menu",
        touch: "…",
        change: "today hover only, gone on touch",
      },
      {
        action: "Hide",
        mouse: "menu",
        touch: "…",
        change: "leaves the hover bar (undo via the toast)",
      },
      { action: "Reset state", mouse: "menu", touch: "…", change: "leaves the hover bar" },
      { action: "Pin to shelf", mouse: "menu", touch: "…" },
      {
        action: "Copy title / Copy link",
        mouse: "menu",
        touch: "…",
        change: "new (text stays selectable)",
      },
    ],
  },
  {
    object: "Playlist item row",
    rows: [
      { action: "Play", mouse: "rest", touch: "visible" },
      {
        action: "Reorder (drag grip)",
        mouse: "rest",
        touch: "visible",
        change: "the grip gets touch-action: none",
      },
      { action: "Move top / up / down / bottom", mouse: "menu", touch: "…" },
      { action: "Move to… / to a recent playlist", mouse: "menu", touch: "…" },
      { action: "Pin", mouse: "menu", touch: "…" },
      { action: "Copy title / Copy link", mouse: "menu", touch: "…", change: "new" },
      {
        action: "Remove from playlist",
        mouse: "menu",
        touch: "…",
        danger: true,
        change: "the X column goes; Delete key + undo toast",
      },
    ],
  },
  {
    object: "Playlist (the rail row and the page header)",
    rows: [
      { action: "Open", mouse: "rest", touch: "visible" },
      { action: "Play all", mouse: "rest", touch: "visible", change: "header" },
      {
        action: "Rename",
        mouse: "menu",
        touch: "…",
        change: "the header pencil becomes a menu item",
      },
      { action: "Pin", mouse: "menu", touch: "…" },
      {
        action: "Open on YouTube / Push to YouTube",
        mouse: "menu",
        touch: "…",
        change: "from the header into the menu",
      },
      { action: "Revert to YouTube", mouse: "menu", touch: "…", danger: true },
      {
        action: "Delete",
        mouse: "menu",
        touch: "…",
        danger: true,
        change: "the header trash goes into the menu",
      },
    ],
  },
  {
    object: "Channel row (Channels manager)",
    rows: [
      { action: "Open the channel", mouse: "rest", touch: "visible" },
      {
        action: "Priority (stepper)",
        mouse: "rest",
        touch: "visible",
        change: "it is a value, so it stays",
      },
      { action: "Tags", mouse: "rest", touch: "visible", change: "a value, stays" },
      {
        action: "Hidden from feed (state)",
        mouse: "rest",
        touch: "visible",
        change: "a badge; the toggle moves to the menu",
      },
      {
        action: "Hide / unhide, Backfill",
        mouse: "menu",
        touch: "…",
        change: "from row buttons into the menu",
      },
      { action: "Pin, Copy name / link", mouse: "menu", touch: "…" },
      {
        action: "Reset backfill (admin), Unsubscribe",
        mouse: "menu",
        touch: "…",
        danger: true,
        change: "from row buttons into the menu",
      },
    ],
  },
  {
    object: "Plex card (movie, show, season, episode)",
    rows: [
      { action: "Open / play", mouse: "rest", touch: "visible" },
      {
        action: "Watched (state)",
        mouse: "rest",
        touch: "visible",
        change: "the badge stays; the toggle is hover + menu",
      },
      {
        action: "Watched (toggle)",
        mouse: "hover",
        touch: "…",
        change: "today hover only, not in the menu",
      },
      {
        action: "Add to playlist",
        mouse: "hover",
        touch: "…",
        change: "today hover only on seasons",
      },
      { action: "Details", mouse: "menu", touch: "…", change: "today hover only" },
      { action: "Pin", mouse: "menu", touch: "…" },
    ],
  },
  {
    object: "Download row",
    rows: [
      { action: "Play (library, shared)", mouse: "rest", touch: "visible" },
      {
        action: "Pause / resume / retry (queue)",
        mouse: "rest",
        touch: "visible",
        change: "the queue's primary action",
      },
      { action: "Save file", mouse: "rest", touch: "visible" },
      { action: "Error details (state)", mouse: "rest", touch: "visible" },
      {
        action: "Edit clip, Edit details, Share, Manage shares, Redownload, Copy source URL",
        mouse: "menu",
        touch: "…",
        change: "six row buttons become one '…'; a menu is new here",
      },
      {
        action: "Cancel, Delete, Remove shared",
        mouse: "menu",
        touch: "…",
        danger: true,
        change: "from row buttons into the menu",
      },
    ],
  },
  {
    object: "Notification row",
    rows: [
      {
        action: "Its link (open Downloads / Scheduler, review access…)",
        mouse: "rest",
        touch: "visible",
      },
      { action: "Unread (state), Mark read", mouse: "rest", touch: "visible" },
      {
        action: "Revert / find (activity rows)",
        mouse: "menu",
        touch: "…",
        change: "a menu is new here",
      },
      { action: "Dismiss", mouse: "hover", touch: "…" },
      { action: "Header: Mark all read", mouse: "rest", touch: "visible" },
      {
        action: "Header: Clear everything",
        mouse: "menu",
        touch: "…",
        danger: true,
        change: "into the header's '…'",
      },
    ],
  },
  {
    object: "Scheduler job row and page",
    rows: [
      { action: "Run now", mouse: "rest", touch: "visible" },
      { action: "Interval (value, click to edit)", mouse: "rest", touch: "visible" },
      { action: "Page: Run all, Pause / resume", mouse: "rest", touch: "visible" },
      {
        action: "Page: Purge discovery",
        mouse: "menu",
        touch: "…",
        danger: true,
        change: "into the page's '…'",
      },
    ],
  },
];

const BACKGROUND: [string, string][] = [
  ["Feed", "Sort · View (grid / list) · Watch state · Shorts on / off"],
  ["Plex browse", "Sort · View"],
  ["Channels", "Sort · Sync subscriptions · Backfill everything"],
  ["Playlists", "New playlist · Sync with YouTube"],
  ["Downloads", "Queue / Library / Shared (the tabs)"],
  ["Notifications", "Mark all read"],
];

const MOUSE: Record<Where, string> = {
  rest: "● at rest",
  hover: "◐ on hover",
  menu: "☰ menu",
};

function Table() {
  return (
    <div className="overflow-x-auto rounded-xl border border-border/60">
      <table className="w-full text-left text-xs">
        <thead className="text-muted">
          <tr className="[&>th]:px-2 [&>th]:py-1.5 [&>th]:font-medium">
            <th>Action</th>
            <th>Mouse</th>
            <th>Touch</th>
            <th>Change against today</th>
          </tr>
        </thead>
        {TABLE.map((g) => (
          <tbody key={g.object} className="border-t border-border/60">
            <tr>
              <th colSpan={4} className="bg-card/60 px-2 py-1.5 font-semibold">
                {g.object}
              </th>
            </tr>
            {g.rows.map((r) => (
              <tr key={r.action} className="[&>td]:px-2 [&>td]:py-1 align-top">
                <td className={clsx(r.danger && "text-danger")}>
                  {r.action}
                  {r.danger && " ⚠"}
                </td>
                <td className="whitespace-nowrap">{MOUSE[r.mouse]}</td>
                <td className="whitespace-nowrap">
                  {r.touch === "visible" ? "● visible" : "… menu"}
                </td>
                <td className="text-muted">{r.change}</td>
              </tr>
            ))}
          </tbody>
        ))}
      </table>
    </div>
  );
}

function Card({ touch }: { touch: boolean }) {
  // The IconButton `media` face (a dark button on a picture); the touch rendering shows the 44 box
  // that a coarse pointer gives it (A3).
  const act = clsx(iconButtonClass({ variant: "media", size: "sm" }), touch && "size-11");
  return (
    <div className={`${SURFACE.card} group flex w-60 flex-col gap-1.5 p-1.5`}>
      <div className="relative aspect-video overflow-hidden rounded-lg bg-linear-to-br from-accent/50 to-card">
        <span className="absolute inset-x-0 bottom-0 h-1 bg-white/25">
          <span className="block h-1 w-1/3 bg-accent" />
        </span>
        <span className="absolute left-1.5 top-1.5 rounded-full bg-black/60 px-1.5 py-0.5 text-3xs text-white">
          12:04 left
        </span>
        {!touch && (
          <span className="absolute bottom-2 right-1.5 flex gap-1">
            <span className={act}>
              <Check className="h-3.5 w-3.5" />
            </span>
            <span className={act}>
              <Bookmark className="h-3.5 w-3.5" />
            </span>
            <span className={act}>
              <ListPlus className="h-3.5 w-3.5" />
            </span>
            <span className={act}>
              <MoreHorizontal className="h-3.5 w-3.5" />
            </span>
          </span>
        )}
        <span className="absolute inset-0 grid place-items-center">
          <span className="grid h-10 w-10 place-items-center rounded-full bg-black/55 text-white">
            <Play className="h-5 w-5" />
          </span>
        </span>
      </div>
      <div className="flex items-start gap-1">
        <div className="min-w-0 flex-1 px-0.5">
          <div className="line-clamp-2 select-text text-xs font-medium">
            Building a home lab on a budget: Proxmox, ZFS and a cheap NAS
          </div>
          <div className="text-2xs text-muted">Techno Tim · 2 days ago</div>
        </div>
        {touch && (
          <span
            className={clsx(
              "grid shrink-0 place-items-center rounded-lg text-muted",
              "h-11 w-11",
              LAYER,
            )}
          >
            <MoreHorizontal className="h-4 w-4" />
          </span>
        )}
      </div>
    </div>
  );
}

export function C1() {
  return (
    <Reference
      id="c1"
      code="C1"
      title="Action placement: the classification"
      rule="The menu (right-click, long-press, Shift+F10 or the '…' button) lists ALL of an object's actions from one list; the table says what is ALSO visible. Mouse: the primary action and the state at rest, the everyday toggles on hover. Touch: the state and a 44px '…'. Destructive row buttons move into the menu."
    >
      <div className="flex flex-wrap gap-4">
        <Sample label="Card · mouse, hovered">
          <Card touch={false} />
        </Sample>
        <Sample label="Card · touch">
          <Card touch />
        </Sample>
        <Sample label="The background menu (desktop only; it mirrors the toolbar, Shift+right-click = the browser's)">
          <table className="text-xs">
            <tbody>
              {BACKGROUND.map(([page, items]) => (
                <tr key={page} className="align-top [&>td]:py-1 [&>td]:pr-3">
                  <td className="whitespace-nowrap font-medium">{page}</td>
                  <td className="text-muted">{items}</td>
                </tr>
              ))}
            </tbody>
          </table>
        </Sample>
      </div>
      <Table />
    </Reference>
  );
}