import type { VoiceMusicQueueState, VoiceSessionMusicState } from "./voiceSessionTypes.ts";

type MusicResumeSessionLike = { music?: VoiceSessionMusicState | null; musicQueueState?: VoiceMusicQueueState | Record<string, unknown> | null; };

type MusicResumeStateSnapshot = { hasKnownState: boolean; hasQueuedTrack: boolean; hasRememberedTrack: boolean; queueNowPlayingIndex: number | null; queueTrackId: string | null; queueTrackTitle: string | null; rememberedTrackId: string | null; rememberedTrackTitle: string | null; rememberedTrackUrl: string | null; };

function normalizeNonEmptyString(value: unknown) { const normalized = String(value || "").trim(); return normalized || null; }

export function getMusicResumeStateSnapshot( session: MusicResumeSessionLike | null | undefined ): MusicResumeStateSnapshot { const queueState = session?.musicQueueState && typeof session.musicQueueState === "object" ? session.musicQueueState : null; const tracks = Array.isArray(queueState?.tracks) ? queueState.tracks : []; const rawNowPlayingIndex = typeof queueState?.nowPlayingIndex === "number" && Number.isInteger(queueState.nowPlayingIndex) ? queueState.nowPlayingIndex : null; const queueNowPlayingIndex = rawNowPlayingIndex != null && rawNowPlayingIndex >= 0 && rawNowPlayingIndex < tracks.length ? rawNowPlayingIndex : null; const queueTrack = queueNowPlayingIndex != null && tracks[queueNowPlayingIndex] && typeof tracks[queueNowPlayingIndex] === "object" ? tracks[queueNowPlayingIndex] : null; const queueTrackId = normalizeNonEmptyString(queueTrack?.id); const queueTrackTitle = normalizeNonEmptyString(queueTrack?.title); const hasQueuedTrack = Boolean(queueTrackId && queueTrackTitle);

const music = session?.music && typeof session.music === "object" ? session.music : null; const rememberedTrackId = normalizeNonEmptyString(music?.lastTrackId); const rememberedTrackTitle = normalizeNonEmptyString(music?.lastTrackTitle); const rememberedTrackUrl = normalizeNonEmptyString(music?.lastTrackUrl); const hasRememberedTrack = Boolean( rememberedTrackUrl || (rememberedTrackId && rememberedTrackTitle) );

return { hasKnownState: hasQueuedTrack || hasRememberedTrack, hasQueuedTrack, hasRememberedTrack, queueNowPlayingIndex, queueTrackId, queueTrackTitle, rememberedTrackId, rememberedTrackTitle, rememberedTrackUrl }; }

export function hasKnownMusicResumeState(session: MusicResumeSessionLike | null | undefined) { return getMusicResumeStateSnapshot(session).hasKnownState; }

export function noteMusicResumeRequest( session: MusicResumeSessionLike | null | undefined, reason: string ) { const music = session?.music && typeof session.music === "object" ? session.music : null; if (!music) return null; music.lastCommandAt = Date.now(); music.lastCommandReason = String(reason || "music_resumed"); return music; }

export function setKnownMusicQueuePausedState( session: MusicResumeSessionLike | null | undefined, isPaused: boolean ) { const queueState = session?.musicQueueState && typeof session.musicQueueState === "object" ? session.musicQueueState : null; if (!queueState) return null; queueState.isPaused = Boolean(isPaused); return queueState; }