import type { MealTime, MealType } from "@/types/domain"

export interface TimeContext {
  mealTime: MealTime
  mealType: MealType
  hour: number
  minute: number
}

/**
 * Local-time meal context for the suggestion engine.
 * until 10:30 → breakfast · until 14:30 → lunch · until 17:30 → snack · else dinner
 */
export function getTimeContext(date = new Date()): TimeContext {
  const hour = date.getHours()
  const minute = date.getMinutes()
  const minutes = hour * 60 + minute

  let mealTime: MealTime
  if (minutes < 10 * 60 + 30) mealTime = "breakfast"
  else if (minutes < 14 * 60 + 30) mealTime = "lunch"
  else if (minutes < 17 * 60 + 30) mealTime = "snack"
  else mealTime = "dinner"

  const mealType: MealType =
    mealTime === "breakfast" || mealTime === "snack" ? "half" : "full"

  return { mealTime, mealType, hour, minute }
}

export function formatClock(hour: number, minute: number): string {
  const hh = String(hour).padStart(2, "0")
  const mm = String(minute).padStart(2, "0")
  return `${hh}:${mm}`
}