import type { Stage } from "../types"

const TABLAS = [3, 4, 6, 7, 8, 9] as const

const exercises: any[] = []

let idx = 0
for (const t of TABLAS) {
  for (let m = 1; m <= 10; m++) {
    const correct = t * m
    exercises.push({
      id: `fra6-tabla${t}-${m}`,
      stage: 6,
      skillCode: `tabla-${t}-x-${m}`,
      type: "eleccion",
      prerequisites: idx === 0 ? [] : [exercises[idx - 1]?.id].filter(Boolean),
      content: {
        instruction: `¿Cuánto es ${t} × ${m}?`,
        audioText: `${t} por ${m} es ${correct}`,
        emoji: "✖️",
        options: [
          { label: String(correct), correct: true, id: String(correct) },
          { label: String(correct + t), correct: false, id: `w1-${idx}` },
          { label: String(Math.max(correct - 1, 1)), correct: false, id: `w2-${idx}` },
        ].sort(() => Math.random() - 0.5),
      },
      functionalContext: `Memorizar tabla del ${t} con método Montessori (tabla perforada, material de cuentas).`,
      errorType: "confusion-letra",
    })
    idx++
  }
}

const stage: Stage = {
  id: 6,
  name: "Tablas de multiplicar (3, 4, 6, 7, 8, 9)",
  description: "Completar todas las tablas de multiplicar restantes con método Montessori.",
  exercises,
}

export default stage