import type { FastifyInstance, FastifyReply } from 'fastify'
import { randomBytes } from 'node:crypto'
import {
  createRefreshSession,
  touchLastLogin,
  type UserRow,
} from '@authportal/db'
import { issueAccessToken } from './issue-access-token.js'
import { safeAudit } from './audit.js'
import { targetAppFromReturnTo } from './target-app.js'

export const REFRESH_COOKIE = 'refresh_token'

export function completeLogin(
  app: FastifyInstance,
  reply: FastifyReply,
  user: UserRow,
  opts: {
    method: 'password' | 'passkey'
    returnTo?: string
    ip: string | null
    userAgent: string | null
  },
) {
  const body = issueAccessToken(app, user)
  const refreshRaw = randomBytes(32).toString('hex')
  const refreshExpires = new Date(
    Date.now() + app.config.refreshTtlDays * 24 * 60 * 60 * 1000,
  )
  createRefreshSession(app.db, user.id, refreshRaw, refreshExpires, {
    ip: opts.ip,
    userAgent: opts.userAgent,
  })
  touchLastLogin(app.db, user.id, opts.ip)

  reply.header(
    'Set-Cookie',
    `${REFRESH_COOKIE}=${refreshRaw}; Path=/; HttpOnly; SameSite=Lax; Max-Age=${app.config.refreshTtlDays * 86400}${app.config.isProd ? '; Secure' : ''}`,
  )

  const targetApp = targetAppFromReturnTo(opts.returnTo)
  const isPasskey = opts.method === 'passkey'
  safeAudit(app, {
    action: isPasskey ? 'auth.passkey_login' : 'auth.login',
    severity: 'info',
    actorUserId: user.id,
    actorEmail: user.email,
    actorName: user.name,
    targetType: 'session',
    targetId: user.id,
    summary: isPasskey
      ? `Вход (passkey): ${user.email}`
      : `Вход: ${user.email}`,
    details: {
      method: opts.method,
      user_agent: opts.userAgent,
      return_to: opts.returnTo ?? null,
      target_app: targetApp,
    },
    ip: opts.ip,
  })

  return body
}