import { getGameDb } from '@/lib/db/client'
import { ensureSave } from '@/lib/game/save'
import { acceptMission, MissionError } from '@/lib/game/missions'

// Accept an AVAILABLE mission — it becomes the single active one. Costs a turn; returns the fresh board.
export async function POST(_req: Request, ctx: { params: Promise<{ id: string }> }) {
  const db = await getGameDb()
  await ensureSave(db) // acceptMission assumes a save exists

  const { id } = await ctx.params
  const missionId = Number(id)
  if (!Number.isInteger(missionId)) {
    return Response.json({ error: 'mission id must be an integer' }, { status: 400 })
  }

  try {
    return Response.json(await acceptMission(db, missionId))
  } catch (err) {
    if (err instanceof MissionError) {
      return Response.json({ error: err.message }, { status: err.status })
    }
    throw err
  }
}