// Handler-level tests for mission accept (Task 5a(ii)): instant and free per the approved
// spec (JC-19) — the AVAILABLE → ACTIVE flip and the event land at the current turn, no
// turn is spent, no crew params; the board response shape is unchanged.
import { mkdtemp, rm } from 'node:fs/promises'
import { tmpdir } from 'node:os'
import path from 'node:path'
import { afterAll, describe, expect, it } from 'vitest'
import { getGameDb, type GameDb } from '@/lib/db/client'
import * as schema from '@/lib/db/schema'
import { getMissions } from '@/lib/game/missions'
import { buildWorldFixture } from '@/lib/game/test-fixtures'
import { POST } from './route'

const dirs: string[] = []
// The route talks to the app-process singleton (getGameDb), so each test points it at a
// fresh temp file and uses that very instance for fixtures and assertions — two in-memory
// sql.js copies of one file would never see each other's writes.
const g = globalThis as unknown as { __spaceWandererGameDb?: Promise<GameDb> }

async function freshFile(): Promise<{ db: GameDb; file: string }> {
  const dir = await mkdtemp(path.join(tmpdir(), 'sw-mission-accept-route-test-'))
  dirs.push(dir)
  const file = path.join(dir, 'test.db')
  process.env.SPACE_WANDERER_DB_PATH = file
  delete g.__spaceWandererGameDb
  return { db: await getGameDb(), file }
}

afterAll(async () => {
  delete process.env.SPACE_WANDERER_DB_PATH
  delete g.__spaceWandererGameDb
  for (const d of dirs) await rm(d, { recursive: true, force: true })
})

const post = (id: string) => POST(new Request(`http://localhost/api/missions/${id}/accept`, { method: 'POST' }), { params: Promise.resolve({ id }) })

// The fixture suite mints no mission rows (JC-6) — insert exactly what the test needs (same
// shape as the insertMission helper in lib/game/missions.test.ts, plus a state override).
async function insertMission(
  db: GameDb,
  fields: { type: string; description: string; targetSystemId?: number | null; conditionKind?: string | null; progressTarget?: number; rewardKind?: string; rewardQty?: number; state?: string },
): Promise<number> {
  const [save] = await db.db.select().from(schema.saves).limit(1)
  const [row] = await db.db
    .insert(schema.missions)
    .values({ saveId: save.id, type: fields.type, description: fields.description, targetSystemId: fields.targetSystemId ?? null, conditionKind: fields.conditionKind ?? null, progressTarget: fields.progressTarget ?? 1, rewardKind: fields.rewardKind ?? 'resource', rewardQty: fields.rewardQty ?? 1, state: fields.state ?? 'AVAILABLE' })
    .returning()
  return row.id
}

describe('POST /api/missions/[id]/accept (5a(ii))', () => {
  it('happy: mission goes active, board returned, turn unchanged (free)', async () => {
    const { db } = await freshFile()
    await buildWorldFixture(db)
    const id = await insertMission(db, { type: 'DELIVER', description: 'Jump to Outpost', targetSystemId: 2 })
    const [before] = await db.db.select().from(schema.saves)

    const res = await post(String(id))
    expect(res.status).toBe(200)
    expect(await res.json()).toEqual(await getMissions(db)) // same board shape as today
    expect((await db.db.select().from(schema.missions)).find((m) => m.id === id)!.state).toBe('ACTIVE') // AVAILABLE → active
    expect((await db.db.select().from(schema.saves))[0].turn).toBe(before.turn) // free — no turn cost
  })

  it('non-integer id → 400, nothing changes', async () => {
    const { db } = await freshFile()
    await buildWorldFixture(db)
    const [before] = await db.db.select().from(schema.saves)
    expect((await post('abc')).status).toBe(400)
    expect((await db.db.select().from(schema.saves))[0].turn).toBe(before.turn)
  })

  it('unknown id → 404, nothing changes', async () => {
    const { db } = await freshFile()
    await buildWorldFixture(db)
    const [before] = await db.db.select().from(schema.saves)
    expect((await post('999')).status).toBe(404)
    expect((await db.db.select().from(schema.saves))[0].turn).toBe(before.turn)
  })

  it('not AVAILABLE → 409 (existing code), nothing changes', async () => {
    const { db } = await freshFile()
    await buildWorldFixture(db)
    const id = await insertMission(db, { type: 'EXPLORE', description: 'Scan 2 bodies', progressTarget: 2, state: 'ACTIVE' })
    const [before] = await db.db.select().from(schema.saves)
    expect((await post(String(id))).status).toBe(409)
    expect((await db.db.select().from(schema.saves))[0].turn).toBe(before.turn)
  })

  it('a mission already active → 409 (existing code), the target stays AVAILABLE', async () => {
    const { db } = await freshFile()
    await buildWorldFixture(db)
    await insertMission(db, { type: 'FIND', description: 'Find a part while scanning', conditionKind: 'part', state: 'ACTIVE' })
    const id = await insertMission(db, { type: 'EXPLORE', description: 'Scan 2 bodies', progressTarget: 2 })
    const [before] = await db.db.select().from(schema.saves)
    expect((await post(String(id))).status).toBe(409)
    expect((await db.db.select().from(schema.saves))[0].turn).toBe(before.turn)
    expect((await db.db.select().from(schema.missions)).find((m) => m.id === id)!.state).toBe('AVAILABLE')
  })
})