import { Hono } from 'hono'
import { db, schema } from '../db/index.js'
import { eq } from 'drizzle-orm'
import { joinQueue, leaveQueue, getQueueSize, getQueueSnapshot } from '../engine/queue.js'

export const queueRouter = new Hono()

// Get queue status
queueRouter.get('/status', (c) => {
  return c.json({
    waiting: getQueueSize(),
    queue: getQueueSnapshot(),
  })
})

// Join the queue — blocks until matched, then returns fightId
queueRouter.post('/join/:botId', async (c) => {
  const botId = c.req.param('botId')

  const botRows = await db.select({ id: schema.bots.id, name: schema.bots.name })
    .from(schema.bots)
    .where(eq(schema.bots.id, botId))
    .limit(1)

  if (botRows.length === 0) {
    return c.json({ error: 'Bot not found.' }, 404)
  }

  try {
    const fightId = await joinQueue(botId)
    return c.json({ fightId, message: 'Matched! Fight starting.' })
  } catch (err) {
    const message = err instanceof Error ? err.message : 'Queue error'
    return c.json({ error: message }, 500)
  }
})

// Leave the queue
queueRouter.post('/leave/:botId', (c) => {
  const botId = c.req.param('botId')
  const left = leaveQueue(botId)
  return c.json({ left })
})