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* Extract session statistics for song prompt generation.
*
* Takes a session plan, player, recent history, and optional game-break report
* and produces a structured input object that gives the LLM concrete story
* material instead of vague achievement summaries.
*/
import { PRACTICE_TYPES } from '@/constants/practiceTypes'
import type { GameResult } from '@/db/schema/game-results'
import type { Player } from '@/db/schema/players'
import {
getCompletedProblemCount,
getSessionPlanAccuracy,
getTotalProblemCount,
} from '@/db/schema/session-plan-helpers'
import type {
GameBreakEndReason,
GeneratedProblem,
ProblemSlot,
SessionPart,
SessionPlan,
SlotResult,
} from '@/db/schema/session-plans'
import type { GameResultsReport } from '@/lib/arcade/game-sdk/types'
import { getSkillDisplayName } from '@/utils/skillSearch'
import type { SongConcept } from './concept-selector'
// ============================================================================
// Types
// ============================================================================
export type SongProblemMomentKind =
| 'comeback'
| 'help_breakthrough'
| 'hard_problem'
| 'streak_peak'
| 'slow_burn'
| 'finale'
export interface SongProblemMoment {
kind: SongProblemMomentKind
reason: string
problem: string
partType: string
purpose?: ProblemSlot['purpose']
answer: number
studentAnswers: number[]
attempts: number
incorrectAttempts: number
outcome: 'correct' | 'eventually_correct' | 'incorrect'
skills: string[]
strategySteps: string[]
responseSeconds?: number
}
export interface SongSkillSpotlight {
skill: string
attempts: number
correct: number
problems: number
exampleProblems: string[]
}
export interface SongPromptInput {
player: {
name: string
emoji: string
/** Age in years (computed from birthday, if available) */
age?: number
}
currentSession: {
accuracy: number
problemsDone: number
problemsTotal: number
skillsPracticed: string[]
bestCorrectStreak: number
partTypes: string[]
durationMinutes: number
helpUsed: boolean
totalIncorrectAttempts: number
helpMoments: number
retryMoments: number
averageResponseSeconds?: number
}
practiceDrama: {
storyAngle: string
arcs: string[]
problemMoments: SongProblemMoment[]
skillSpotlights: SongSkillSpotlight[]
}
/** Optional deterministic story concept selected after evidence extraction. */
songConcept?: SongConcept
history: {
recentSessionCount: number
averageAccuracy: number
trend: 'improving' | 'steady' | 'declining'
}
/** Optional game break results from this session */
gameBreak?: {
gameName: string
headline: string
accuracy?: number
highlights: string[]
details: string[]
moments: string[]
outcome?: string
}
}
// ============================================================================
// Generic helpers
// ============================================================================
function uniqueStrings(values: Array<string | null | undefined>, limit = Number.POSITIVE_INFINITY) {
const seen = new Set<string>()
const result: string[] = []
for (const value of values) {
const trimmed = value?.trim()
if (!trimmed || seen.has(trimmed)) continue
seen.add(trimmed)
result.push(trimmed)
if (result.length >= limit) break
}
return result
}
function uniqueNumbers(values: Array<number | null | undefined>) {
const seen = new Set<number>()
const result: number[] = []
for (const value of values) {
if (typeof value !== 'number' || !Number.isFinite(value) || seen.has(value)) continue
seen.add(value)
result.push(value)
}
return result
}
function formatDurationSeconds(ms: number | null | undefined): number | undefined {
if (typeof ms !== 'number' || !Number.isFinite(ms) || ms <= 0) return undefined
return Math.round(ms / 100) / 10
}
function median(values: number[]): number | undefined {
const sorted = values.filter((v) => Number.isFinite(v) && v > 0).sort((a, b) => a - b)
if (sorted.length === 0) return undefined
const mid = Math.floor(sorted.length / 2)
return sorted.length % 2 === 0 ? (sorted[mid - 1] + sorted[mid]) / 2 : sorted[mid]
}
function getBestCorrectStreak(results: Array<{ isCorrect: boolean }>): number {
return findBestCorrectStreak(results).length
}
function findBestCorrectStreak(results: Array<{ isCorrect: boolean }>): {
length: number
startIndex: number
endIndex: number
} {
let best = 0
let bestStart = -1
let bestEnd = -1
let current = 0
let currentStart = 0
for (let i = 0; i < results.length; i++) {
if (results[i].isCorrect) {
if (current === 0) currentStart = i
current++
if (current > best) {
best = current
bestStart = currentStart
bestEnd = i
}
} else {
current = 0
}
}
return { length: best, startIndex: bestStart, endIndex: bestEnd }
}
function getPartTypeLabel(partType: string): string {
const found = PRACTICE_TYPES.find((t) => t.id === partType)
return found?.label ?? partType
}
function computeAge(birthday: string | null | undefined): number | undefined {
if (!birthday) return undefined
const birth = new Date(birthday)
if (Number.isNaN(birth.getTime())) return undefined
const now = new Date()
let age = now.getFullYear() - birth.getFullYear()
const monthDiff = now.getMonth() - birth.getMonth()
if (monthDiff < 0 || (monthDiff === 0 && now.getDate() < birth.getDate())) {
age--
}
return age >= 0 ? age : undefined
}
function formatProblemExpression(terms: number[], answer: number): string {
const expression = terms
.map((term, index) => {
if (index === 0) return String(term)
return term < 0 ? ` - ${Math.abs(term)}` : ` + ${term}`
})
.join('')
return `${expression} = ${answer}`
}
function displaySkill(skillId: string): string {
return getSkillDisplayName(skillId).replace(/\s+/g, ' ').trim()
}
function getProblemSkillIds(problem: GeneratedProblem, resultSkills: string[] = []): string[] {
return uniqueStrings([
...(resultSkills ?? []),
...(problem.skillsRequired ?? []),
...(problem.generationTrace?.allSkills ?? []),
...(problem.generationTrace?.steps?.flatMap((step) => step.skillsUsed ?? []) ?? []),
])
}
function getStrategySteps(problem: GeneratedProblem): string[] {
const trace = problem.generationTrace
if (!trace?.steps?.length) {
return uniqueStrings(
(problem.skillsRequired ?? []).map((skill) => `Used ${displaySkill(skill)}`),
3
)
}
const stepNotes = trace.steps
.filter((step) => step.skillsUsed?.length)
.map((step) => {
const skills = uniqueStrings(step.skillsUsed.map(displaySkill), 3).join(', ')
return `${step.operation} using ${skills}`
})
return uniqueStrings(stepNotes, 4)
}
function slotLookup(plan: SessionPlan) {
const byId = new Map<
string,
{
slot: ProblemSlot
part: SessionPart
partIndex: number
slotIndex: number
}
>()
plan.parts.forEach((part, partIndex) => {
part.slots.forEach((slot, slotIndex) => {
if (slot.slotId) {
byId.set(slot.slotId, { slot, part, partIndex, slotIndex })
}
})
})
return byId
}
// ============================================================================
// Practice drama extraction
// ============================================================================
interface ProblemAttemptSummary {
slotId: string
resultIndex: number
partType: string
purpose?: ProblemSlot['purpose']
problem: GeneratedProblem
problemText: string
answer: number
studentAnswers: number[]
attempts: number
incorrectAttempts: number
isCorrect: boolean
outcome: SongProblemMoment['outcome']
hadHelp: boolean
usedOnScreenAbacus: boolean
responseTimeMs: number
totalResponseTimeMs: number
complexityCost?: number
skillIds: string[]
skillLabels: string[]
strategySteps: string[]
retryEpochs: number[]
}
function summarizeProblemAttempts(plan: SessionPlan): ProblemAttemptSummary[] {
const lookup = slotLookup(plan)
const groups = new Map<string, Array<{ result: SlotResult; resultIndex: number }>>()
plan.results.forEach((result, resultIndex) => {
const key = result.slotId || `${result.partNumber}-${result.slotIndex}-${resultIndex}`
const group = groups.get(key) ?? []
group.push({ result, resultIndex })
groups.set(key, group)
})
const summaries: ProblemAttemptSummary[] = []
for (const [slotId, group] of groups) {
const final = group[group.length - 1]
if (!final?.result?.problem) continue
const finalResult = final.result
const problem = finalResult.problem
const slotMeta = lookup.get(slotId)
const partType =
slotMeta?.part.type ??
plan.parts[(finalResult.partNumber ?? 1) - 1]?.type ??
String(finalResult.partNumber ?? 'practice')
const perResultAttemptCounts = group.map(({ result }) =>
Math.max(1, (result.incorrectAttempts ?? 0) + (result.isCorrect ? 1 : 0))
)
const attempts = Math.max(group.length, ...perResultAttemptCounts)
const incorrectAttempts = Math.max(
group.filter(({ result }) => !result.isCorrect).length,
...group.map(({ result }) => result.incorrectAttempts ?? 0),
attempts - (finalResult.isCorrect ? 1 : 0)
)
const skillIds = getProblemSkillIds(
problem,
group.flatMap(({ result }) => result.skillsExercised ?? [])
)
const retryEpochs = uniqueNumbers(group.map(({ result }) => result.epochNumber))
const totalResponseTimeMs = group.reduce(
(sum, { result }) => sum + (result.responseTimeMs ?? 0),
0
)
summaries.push({
slotId,
resultIndex: final.resultIndex,
partType: getPartTypeLabel(partType),
purpose: slotMeta?.slot.purpose,
problem,
problemText: formatProblemExpression(problem.terms, problem.answer),
answer: problem.answer,
studentAnswers: uniqueNumbers(group.map(({ result }) => result.studentAnswer)),
attempts,
incorrectAttempts,
isCorrect: finalResult.isCorrect,
outcome: finalResult.isCorrect
? attempts > 1 || incorrectAttempts > 0
? 'eventually_correct'
: 'correct'
: 'incorrect',
hadHelp: group.some(({ result }) => result.hadHelp),
usedOnScreenAbacus: group.some(({ result }) => result.usedOnScreenAbacus),
responseTimeMs: finalResult.responseTimeMs ?? 0,
totalResponseTimeMs,
complexityCost: problem.generationTrace?.totalComplexityCost,
skillIds,
skillLabels: skillIds.map(displaySkill),
strategySteps: getStrategySteps(problem),
retryEpochs,
})
}
return summaries.sort((a, b) => a.resultIndex - b.resultIndex)
}
function isHardSkill(skillId: string): boolean {
return (
skillId.startsWith('tenComplements') ||
skillId.startsWith('advanced') ||
skillId.startsWith('mixedComplements')
)
}
function scoreProblemMoment(summary: ProblemAttemptSummary, responseMedian?: number): number {
let score = 0
if (summary.outcome === 'eventually_correct') score += 10
if (summary.outcome === 'incorrect' && summary.incorrectAttempts > 0) score += 7
if (summary.hadHelp || summary.usedOnScreenAbacus) score += 5
if (summary.attempts >= 3) score += 3
if ((summary.complexityCost ?? 0) >= 5) score += 4
else if ((summary.complexityCost ?? 0) >= 3) score += 2
if (summary.skillIds.some(isHardSkill)) score += 3
if (summary.purpose === 'challenge') score += 2
if (summary.retryEpochs.length > 0) score += 2
if (responseMedian && summary.responseTimeMs > responseMedian * 1.6) score += 2
return score
}
function kindForSummary(
summary: ProblemAttemptSummary,
responseMedian?: number
): SongProblemMomentKind {
if (summary.outcome === 'eventually_correct') return 'comeback'
if (summary.hadHelp || summary.usedOnScreenAbacus) return 'help_breakthrough'
if (responseMedian && summary.responseTimeMs > responseMedian * 1.6) return 'slow_burn'
return 'hard_problem'
}
function reasonForSummary(
summary: ProblemAttemptSummary,
kind: SongProblemMomentKind,
streakLength?: number
): string {
if (kind === 'streak_peak') {
return `sealed a ${streakLength ?? 0}-problem correct streak`
}
if (kind === 'comeback') {
return `came back on this problem after ${summary.attempts} attempts`
}
if (kind === 'help_breakthrough') {
return `used help as a strategy instead of getting stuck`
}
if (kind === 'slow_burn') {
const seconds = formatDurationSeconds(summary.responseTimeMs)
return seconds ? `stayed with it for ${seconds} seconds` : 'stayed with a slower problem'
}
if (kind === 'finale') return 'closed the session with a final push'
if ((summary.complexityCost ?? 0) >= 5) {
return `high-complexity problem with cost ${summary.complexityCost}`
}
if (summary.skillLabels.length > 0) {
return `spotlighted ${summary.skillLabels.slice(0, 2).join(' and ')}`
}
return 'stood out as a specific session moment'
}
function toProblemMoment(
summary: ProblemAttemptSummary,
kind: SongProblemMomentKind,
reason: string
): SongProblemMoment {
return {
kind,
reason,
problem: summary.problemText,
partType: summary.partType,
...(summary.purpose && { purpose: summary.purpose }),
answer: summary.answer,
studentAnswers: summary.studentAnswers,
attempts: summary.attempts,
incorrectAttempts: summary.incorrectAttempts,
outcome: summary.outcome,
skills: summary.skillLabels.slice(0, 5),
strategySteps: summary.strategySteps.slice(0, 4),
...(formatDurationSeconds(summary.responseTimeMs) != null && {
responseSeconds: formatDurationSeconds(summary.responseTimeMs),
}),
}
}
function selectProblemMoments(
summaries: ProblemAttemptSummary[],
results: SlotResult[]
): SongProblemMoment[] {
if (summaries.length === 0) return []
const responseMedian = median(summaries.map((s) => s.responseTimeMs))
const scored = summaries
.map((summary) => ({
summary,
score: scoreProblemMoment(summary, responseMedian),
}))
.filter(({ score }) => score > 0)
.sort((a, b) => b.score - a.score || b.summary.resultIndex - a.summary.resultIndex)
const selected = scored.slice(0, 3).map(({ summary }) => {
const kind = kindForSummary(summary, responseMedian)
return { summary, kind, reason: reasonForSummary(summary, kind) }
})
if (selected.length === 0) {
const fallback = [...summaries].sort(
(a, b) => (b.complexityCost ?? 0) - (a.complexityCost ?? 0) || b.resultIndex - a.resultIndex
)[0]
if (fallback) {
selected.push({
summary: fallback,
kind: 'hard_problem',
reason: reasonForSummary(fallback, 'hard_problem'),
})
}
}
const streak = findBestCorrectStreak(results)
if (streak.length >= 3) {
const streakSummary = summaries.find((summary) => summary.resultIndex === streak.endIndex)
if (streakSummary && !selected.some(({ summary }) => summary.slotId === streakSummary.slotId)) {
selected.push({
summary: streakSummary,
kind: 'streak_peak',
reason: reasonForSummary(streakSummary, 'streak_peak', streak.length),
})
}
}
const last = summaries[summaries.length - 1]
if (
last &&
selected.length < 4 &&
!selected.some(({ summary }) => summary.slotId === last.slotId) &&
(last.outcome === 'eventually_correct' || (last.complexityCost ?? 0) >= 3)
) {
selected.push({
summary: last,
kind: 'finale',
reason: reasonForSummary(last, 'finale'),
})
}
return selected
.slice(0, 4)
.map(({ summary, kind, reason }) => toProblemMoment(summary, kind, reason))
}
function buildSkillSpotlights(summaries: ProblemAttemptSummary[]): SongSkillSpotlight[] {
const stats = new Map<
string,
{
skill: string
attempts: number
correct: number
problems: number
exampleProblems: string[]
}
>()
for (const summary of summaries) {
for (const skillId of uniqueStrings(summary.skillIds)) {
const existing =
stats.get(skillId) ??
({
skill: displaySkill(skillId),
attempts: 0,
correct: 0,
problems: 0,
exampleProblems: [],
} satisfies SongSkillSpotlight)
existing.attempts += summary.attempts
existing.correct += summary.isCorrect ? 1 : 0
existing.problems += 1
if (!existing.exampleProblems.includes(summary.problemText)) {
existing.exampleProblems.push(summary.problemText)
}
stats.set(skillId, existing)
}
}
return [...stats.entries()]
.sort(([aId, a], [bId, b]) => {
const hardDiff = Number(isHardSkill(bId)) - Number(isHardSkill(aId))
return (
hardDiff ||
b.problems - a.problems ||
b.attempts - a.attempts ||
a.skill.localeCompare(b.skill)
)
})
.slice(0, 6)
.map(([, stat]) => ({
skill: stat.skill,
attempts: stat.attempts,
correct: stat.correct,
problems: stat.problems,
exampleProblems: stat.exampleProblems.slice(0, 2),
}))
}
function buildSessionArcs(
summaries: ProblemAttemptSummary[],
bestCorrectStreak: number,
gameBreak?: SongPromptInput['gameBreak']
): string[] {
const arcs: string[] = []
const comeback = summaries.find((s) => s.outcome === 'eventually_correct')
const helpCount = summaries.filter((s) => s.hadHelp || s.usedOnScreenAbacus).length
const hard = [...summaries].sort((a, b) => (b.complexityCost ?? 0) - (a.complexityCost ?? 0))[0]
if (comeback) {
arcs.push(
`Comeback: ${comeback.problemText} took ${comeback.attempts} attempts and finished right.`
)
}
if (bestCorrectStreak >= 3) {
arcs.push(`Streak: ${bestCorrectStreak} correct answers in a row.`)
}
if (helpCount > 0) {
arcs.push(
`Strategy: used help on ${helpCount} problem${helpCount === 1 ? '' : 's'} and kept going.`
)
}
if (hard?.complexityCost != null) {
arcs.push(`Boss problem: ${hard.problemText} carried complexity cost ${hard.complexityCost}.`)
}
if (gameBreak) {
arcs.push(`Side quest: ${gameBreak.gameName} - ${gameBreak.headline}.`)
}
return uniqueStrings(arcs, 5)
}
function buildStoryAngle(
summaries: ProblemAttemptSummary[],
bestCorrectStreak: number,
gameBreak?: SongPromptInput['gameBreak']
): string {
const comeback = summaries.find((s) => s.outcome === 'eventually_correct')
if (comeback) return `the ${comeback.problemText} comeback`
const helped = summaries.find((s) => s.hadHelp || s.usedOnScreenAbacus)
if (helped) return `the strategy unlock on ${helped.problemText}`
if (bestCorrectStreak >= 4) return `the ${bestCorrectStreak}-in-a-row run`
const hard = [...summaries]
.filter((s) => s.skillIds.some(isHardSkill) || (s.complexityCost ?? 0) >= 3)
.sort((a, b) => (b.complexityCost ?? 0) - (a.complexityCost ?? 0))[0]
if (hard) return `the ${hard.problemText} boss level`
if (gameBreak) return `practice quest with a ${gameBreak.gameName} side quest`
return 'the steady bead-building mission'
}
function buildPracticeDrama(
plan: SessionPlan,
bestCorrectStreak: number,
gameBreak?: SongPromptInput['gameBreak']
): SongPromptInput['practiceDrama'] {
const summaries = summarizeProblemAttempts(plan)
return {
storyAngle: buildStoryAngle(summaries, bestCorrectStreak, gameBreak),
arcs: buildSessionArcs(summaries, bestCorrectStreak, gameBreak),
problemMoments: selectProblemMoments(summaries, plan.results),
skillSpotlights: buildSkillSpotlights(summaries),
}
}
function getCurrentSessionAttemptStats(plan: SessionPlan) {
const summaries = summarizeProblemAttempts(plan)
const responseTimes = plan.results
.map((result) => result.responseTimeMs)
.filter((ms): ms is number => typeof ms === 'number' && Number.isFinite(ms) && ms > 0)
return {
totalIncorrectAttempts: summaries.reduce((sum, summary) => sum + summary.incorrectAttempts, 0),
helpMoments: summaries.filter((summary) => summary.hadHelp || summary.usedOnScreenAbacus)
.length,
retryMoments: summaries.filter((summary) => summary.attempts > 1).length,
averageResponseSeconds:
responseTimes.length > 0
? Math.round(
(responseTimes.reduce((sum, ms) => sum + ms, 0) / responseTimes.length / 1000) * 10
) / 10
: undefined,
}
}
// ============================================================================
// Main extractor
// ============================================================================
interface RecentSessionSummary {
accuracy: number
}
/** Fallback break info from the session plan (when no gameResults record exists) */
interface PlanBreakFallback {
breakSelectedGame: string | null
breakReason: GameBreakEndReason | null
breakResults?: GameResultsReport | null
}
/**
* Extract statistics from a session plan and player for use in song generation.
*
* @param plan - The current session plan (may be in-progress or completed)
* @param player - The player profile
* @param recentSessions - Summary of recent sessions (past week) for trend calculation
* @param gameBreakResult - Optional game result from the practice break
* @param planBreakFallback - Fallback break info from the plan
*/
export function extractSessionStats(
plan: SessionPlan,
player: Player,
recentSessions: RecentSessionSummary[],
gameBreakResult?: GameResult | null,
planBreakFallback?: PlanBreakFallback
): SongPromptInput {
const accuracy = getSessionPlanAccuracy(plan)
const problemsDone = getCompletedProblemCount(plan)
const problemsTotal = getTotalProblemCount(plan)
const bestCorrectStreak = getBestCorrectStreak(plan.results)
const partTypeIds = [...new Set(plan.parts.map((p) => p.type))]
const partTypeLabels = partTypeIds.map(getPartTypeLabel)
const skillNames = new Set<string>()
for (const result of plan.results) {
for (const skill of result.skillsExercised ?? []) {
skillNames.add(displaySkill(skill))
}
}
const helpUsed = plan.results.some((r) => r.hadHelp)
const durationMinutes = plan.targetDurationMinutes ?? 10
const recentCount = recentSessions.length
let averageAccuracy = 0
let trend: 'improving' | 'steady' | 'declining' = 'steady'
if (recentCount > 0) {
averageAccuracy = recentSessions.reduce((sum, s) => sum + s.accuracy, 0) / recentCount
if (recentCount >= 3) {
const mid = Math.floor(recentCount / 2)
const olderAvg = recentSessions.slice(0, mid).reduce((sum, s) => sum + s.accuracy, 0) / mid
const newerAvg =
recentSessions.slice(mid).reduce((sum, s) => sum + s.accuracy, 0) / (recentCount - mid)
const diff = newerAvg - olderAvg
if (diff > 0.05) trend = 'improving'
else if (diff < -0.05) trend = 'declining'
}
}
const gameBreak =
extractGameBreak(gameBreakResult) ??
extractGameBreakFromReport(planBreakFallback?.breakResults ?? null) ??
extractGameBreakFallback(planBreakFallback)
const practiceDrama = buildPracticeDrama(plan, bestCorrectStreak, gameBreak)
const attemptStats = getCurrentSessionAttemptStats(plan)
const age = computeAge(player.birthday)
return {
player: {
name: player.name,
emoji: player.emoji,
...(age != null && { age }),
},
currentSession: {
accuracy,
problemsDone,
problemsTotal,
skillsPracticed: [...skillNames],
bestCorrectStreak,
partTypes: partTypeLabels,
durationMinutes,
helpUsed,
...attemptStats,
},
practiceDrama,
history: {
recentSessionCount: recentCount,
averageAccuracy,
trend,
},
gameBreak,
}
}
// ============================================================================
// Game break extraction
// ============================================================================
function normalizePercent(value: number | null | undefined): number | undefined {
if (typeof value !== 'number' || !Number.isFinite(value)) return undefined
return value <= 1 ? Math.round(value * 100) : Math.round(value)
}
function statToText(stat: NonNullable<GameResultsReport['customStats']>[number]): string {
return `${stat.label}: ${String(stat.value)}`
}
function playerResultDetails(report: GameResultsReport): string[] {
return (report.playerResults ?? []).slice(0, 3).map((player) => {
const pieces = [`${player.playerName} scored ${player.score}`]
if (player.correctCount != null && player.totalAttempts != null) {
pieces.push(`${player.correctCount}/${player.totalAttempts} correct`)
}
if (player.accuracy != null) pieces.push(`${normalizePercent(player.accuracy)}% accuracy`)
if (player.bestStreak != null && player.bestStreak > 1) {
pieces.push(`${player.bestStreak}-streak`)
}
return pieces.join(', ')
})
}
function extractGameBreakFromReport(
report?: GameResultsReport | null,
storedAccuracy?: number | null
): SongPromptInput['gameBreak'] {
if (!report) return undefined
const headline = report.headline ?? report.gameDisplayName
const stats = report.customStats ?? []
const highlighted = stats.filter((s) => s.highlight)
const picks = (highlighted.length >= 2 ? highlighted : stats).slice(0, 5)
const highlights = picks.map(statToText)
const playerAccuracy = (report.playerResults ?? []).find((p) => p.accuracy != null)?.accuracy
const accuracy = normalizePercent(storedAccuracy ?? report.teamAccuracy ?? playerAccuracy)
const completion =
report.itemsTotal && report.itemsTotal > 0
? `${report.itemsCompleted ?? 0}/${report.itemsTotal} completed`
: undefined
const difficulty = report.leaderboardEntry?.difficulty
? `Difficulty: ${report.leaderboardEntry.difficulty}`
: undefined
const winner = report.winnerId
? report.playerResults.find((p) => p.playerId === report.winnerId)?.playerName
: undefined
const details = uniqueStrings(
[
report.songContext?.summary,
report.subheadline,
completion,
difficulty,
winner ? `Winner: ${winner}` : undefined,
report.winCondition ? `Win condition: ${report.winCondition}` : undefined,
report.victoryType ? `Victory type: ${report.victoryType}` : undefined,
...playerResultDetails(report),
...(report.songContext?.details ?? []),
],
8
)
const moments = uniqueStrings(
[
...(report.songContext?.dramaticMoments ?? []),
...(report.songContext?.strategyNotes ?? []),
...(report.completedNormally
? ['Game reached its normal finish']
: ['Game ended before a full finish']),
...(report.scoreBreakdown ?? [])
.filter((part) => part.points > 0)
.slice(0, 3)
.map((part) =>
part.maxPoints
? `${part.component}: ${part.points}/${part.maxPoints} points`
: `${part.component}: ${part.points} points`
),
...highlighted.map(statToText),
],
8
)
return {
gameName: report.gameDisplayName,
headline,
...(accuracy != null && { accuracy }),
highlights,
details,
moments,
...(report.songContext?.outcome && { outcome: report.songContext.outcome }),
}
}
function extractGameBreak(result?: GameResult | null): SongPromptInput['gameBreak'] {
if (!result?.fullReport) return undefined
return extractGameBreakFromReport(result.fullReport as GameResultsReport, result.accuracy)
}
const BREAK_REASON_LABELS: Record<GameBreakEndReason, string> = {
timeout: 'timed out',
skipped: 'ended early',
gameFinished: 'completed',
}
function extractGameBreakFallback(fallback?: PlanBreakFallback): SongPromptInput['gameBreak'] {
if (!fallback?.breakSelectedGame) return undefined
const gameName = fallback.breakSelectedGame
const reasonLabel = fallback.breakReason ? BREAK_REASON_LABELS[fallback.breakReason] : 'played'
return {
gameName,
headline: `Played ${gameName} (${reasonLabel})`,
highlights: [],
details: [],
moments: [],
outcome: reasonLabel,
}
}
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