import { ChevronLeft, ChevronRight, Pause, Play, Radio } from "lucide-react";
import { Button } from "@/shared/ui/button";
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/shared/ui/select";
import type { PresentationHistoryControls } from "../utils/presentation-view-history";
import { groupAdjacentPresentationHistory } from "../utils/presentation-history-categories";

import { PresentationHistoryMenu } from "./presentation-history-menu";

const statusLabels = { running: "进行中", completed: "完成", error: "未完成", cancelled: "已取消" };

export function PresentationHistorySwitcher({
  entries,
  currentEntryId,
  selectedId,
  mergedEntry,
  mergedEntries,
  onSelect,
  playback
}: PresentationHistoryControls) {
  const currentEntry = entries.find((entry) => entry.id === currentEntryId);
  const playable = playback?.entries ?? (mergedEntries?.length ? mergedEntries : entries).filter((entry) => entry.status === "completed");
  const grouped = entries.some((entry) => entry.taskId);
  const available = grouped ? groupAdjacentPresentationHistory(entries).flatMap((group) => {
    const view = mergedEntries?.find((entry) => entry.id === group.id)
      ?? group.entries.slice().reverse().find((entry) => entry.status !== "running");
    return view ? [{ id: view.id, stepIds: group.entries.map((entry) => entry.id) }] : [];
  }) : entries.filter(
    (entry) => entry.status !== "running" && (entry.id !== currentEntryId || entry.id === selectedId)
  ).map((entry) => ({ id: entry.id, stepIds: [entry.id] }));
  const index =
    selectedId === null
      ? available.length
      : available.findIndex((entry) => entry.id === selectedId ||
        entry.stepIds.includes(selectedId));
  const progress = selectedId === null ? Math.max(0, playable.length - 1)
    : Math.max(0, playable.findIndex((entry) => entry.id === selectedId || entry.mergedStepIds?.includes(selectedId)));
  return (
    <div className="mt-2 min-w-0 space-y-1.5" role="group" aria-label="展示动作历史">
      <div className="flex min-w-0 items-center gap-1">
        <Button
          type="button"
          variant="ghost"
          size="icon-sm"
          className="size-8 shrink-0"
          aria-label="上一个动作"
          disabled={index <= 0}
          onClick={() => onSelect(available[index - 1].id)}
        >
          <ChevronLeft size={14} aria-hidden />
        </Button>
        {entries.some((entry) => entry.taskId) ? (
          <PresentationHistoryMenu entries={entries} currentEntryId={currentEntryId}
            selectedId={selectedId} mergedEntry={mergedEntry} mergedEntries={mergedEntries} onSelect={onSelect} />
        ) : <Select
          value={selectedId === null ? "current" : String(selectedId)}
          onValueChange={(value) => onSelect(value === "current" ? null : Number(value))}
        >
          <SelectTrigger
            aria-label="切换展示动作"
            className="h-8 min-w-0 flex-1 px-2 text-xs [&>span]:truncate"
          >
            <SelectValue />
          </SelectTrigger>
          <SelectContent
            position="popper"
            sideOffset={4}
            className="workbench-shadcn-surface z-[90] max-w-[calc(100vw-24px)]"
          >
            <SelectItem value="current" className="text-xs">
              当前（最新）
              {currentEntry ? ` · ${entries.indexOf(currentEntry) + 1}. ${currentEntry.label}` : ""} ·{" "}
              {entries.length} 个动作
            </SelectItem>
            {entries
              .slice()
              .reverse()
              .map((entry, position) =>
                entry.id === currentEntryId && entry.id !== selectedId ? null : (
                  <SelectItem
                    key={entry.id}
                    value={String(entry.id)}
                    disabled={entry.status === "running"}
                    className="whitespace-normal text-xs [&>span:last-child]:break-words"
                  >
                    {entries.length - position}. {entry.label} · {statusLabels[entry.status]}
                  </SelectItem>
                )
              )}
          </SelectContent>
        </Select>}
        <Button
          type="button"
          variant="ghost"
          size="icon-sm"
          className="size-8 shrink-0"
          aria-label="下一个动作"
          disabled={selectedId === null}
          onClick={() => onSelect(index + 1 < available.length ? available[index + 1].id : null)}
        >
          <ChevronRight size={14} aria-hidden />
        </Button>
        {selectedId !== null ? (
          <Button
            type="button"
            variant="secondary"
            size="sm"
            className="h-8 shrink-0 gap-1 px-2 text-[11px]"
            onClick={() => onSelect(null)}
          >
            <Radio size={12} aria-hidden />
            回到当前
          </Button>
        ) : null}
      </div>
      {playback ? (
        <div className="flex min-w-0 items-center gap-2" role="group" aria-label="历史播放">
          <Button type="button" variant="ghost" size="icon-sm" className="size-8 shrink-0 text-muted-foreground after:inset-0"
            aria-label={playback.playing ? "暂停历史播放" : "播放历史"}
            title={playback.playing ? "暂停历史播放" : "播放历史"}
            disabled={!playable.length} onClick={playback.onToggle}>
            {playback.playing ? <Pause size={14} aria-hidden /> : <Play size={14} aria-hidden />}
          </Button>
          <input type="range" aria-label="历史播放进度" className="h-8 w-0 min-w-0 flex-1 cursor-pointer accent-primary disabled:cursor-default"
            min={0} max={Math.max(0, playable.length - 1)} step={1} value={progress}
            disabled={playable.length < 2}
            aria-valuetext={selectedId === null ? "当前最新结果" : `第 ${progress + 1} 个，共 ${playable.length} 个结果`}
            onChange={(event) => { const entry = playable[Number(event.target.value)]; if (entry) playback.onSeek(entry.id); }} />
          <span className="shrink-0 text-[11px] tabular-nums text-muted-foreground" aria-label="历史播放位置">
            {playable.length ? progress + 1 : 0}/{playable.length}
          </span>
          <Select value={String(playback.speed)} onValueChange={(value) => playback.onSpeedChange(Number(value))}>
            <SelectTrigger aria-label="历史播放速度"
              className="form-field-inset h-8 w-[54px] shrink-0 justify-center gap-1 border-0 px-1.5 text-xs tabular-nums text-muted-foreground shadow-none hover:bg-muted hover:text-foreground data-[state=open]:bg-muted data-[state=open]:text-foreground [&>svg]:size-3">
              <SelectValue />
            </SelectTrigger>
            <SelectContent position="popper" align="end" sideOffset={4} className="workbench-shadcn-surface z-[90] min-w-[72px]">
              {[0.5, 1, 2].map((speed) => <SelectItem key={speed} value={String(speed)} className="text-xs">{speed}×</SelectItem>)}
            </SelectContent>
          </Select>
        </div>
      ) : null}
    </div>
  );
}