import type { Manual, ManualGroup } from "@/lib/manuals-types"

export function groupManuals(manuals: Manual[]): ManualGroup[] {
  const grouped: Record<string, Record<string, Manual[]>> = {}

  for (const manual of manuals) {
    if (!grouped[manual.manufacturer]) {
      grouped[manual.manufacturer] = {}
    }
    if (!grouped[manual.manufacturer][manual.category]) {
      grouped[manual.manufacturer][manual.category] = []
    }
    grouped[manual.manufacturer][manual.category].push(manual)
  }

  return Object.entries(grouped)
    .map(([manufacturer, categories]) => ({
      manufacturer,
      categories: Object.fromEntries(
        Object.entries(categories).sort(([left], [right]) =>
          left.localeCompare(right)
        )
      ),
    }))
    .sort((left, right) => left.manufacturer.localeCompare(right.manufacturer))
}

export function getManufacturers(manuals: Manual[]): string[] {
  return Array.from(
    new Set(manuals.map((manual) => manual.manufacturer))
  ).sort()
}

export function getCategories(manuals: Manual[]): string[] {
  return Array.from(new Set(manuals.map((manual) => manual.category))).sort()
}