var db = require('../../common/db')
var auth = require('../../common/auth')
var RESPONSE = require('../../common/response').RESPONSE
var ERROR_CODES = require('../../common/response').ERROR_CODES

exports.main_handler = async function (event) {
  try {
    var method = event.httpMethod || 'GET'
    var path = event.path || ''
    var body = parseBody(event)

    if (method === 'GET' && path === '/api/v1/user/profile') {
      return await getProfile(event)
    }
    if (method === 'PUT' && path === '/api/v1/user/profile') {
      return await updateProfile(event, body)
    }

    return RESPONSE.error(ERROR_CODES.PARAM_ERROR.code, 'unknown route')
  } catch (err) {
    console.error('user error:', err)
    return RESPONSE.error(ERROR_CODES.SERVER_ERROR.code, err.message)
  }
}

async function getProfile(event) {
  var user = auth.extractUser(event)
  if (!user) return RESPONSE.error(ERROR_CODES.INVALID_TOKEN.code, ERROR_CODES.INVALID_TOKEN.message)

  var users = await db.query(
    'SELECT id AS user_id, nickname, avatar_url AS avatar, phone, status FROM users WHERE id = ? AND deleted_at IS NULL LIMIT 1',
    [user.user_id]
  )
  if (users.length === 0) {
    return RESPONSE.error(ERROR_CODES.USER_NOT_FOUND.code, ERROR_CODES.USER_NOT_FOUND.message)
  }

  var profile = users[0]

  var bindings = await db.query(
    'SELECT COUNT(*) AS cnt FROM bindings WHERE user_id = ? AND status = 1',
    [user.user_id]
  )
  var bindTime = await db.query(
    'SELECT bound_at AS bind_time FROM bindings WHERE user_id = ? AND status = 1 ORDER BY bound_at ASC LIMIT 1',
    [user.user_id]
  )

  profile.device_count = bindings[0].cnt
  profile.bind_time = bindTime.length > 0 ? bindTime[0].bind_time : null

  return RESPONSE.success(profile)
}

async function updateProfile(event, body) {
  var user = auth.extractUser(event)
  if (!user) return RESPONSE.error(ERROR_CODES.INVALID_TOKEN.code, ERROR_CODES.INVALID_TOKEN.message)

  if (body.nickname) {
    await db.update(
      'UPDATE users SET nickname = ? WHERE id = ?',
      [body.nickname, user.user_id]
    )
  }

  return RESPONSE.success({ message: 'success' })
}

function parseBody(event) {
  if (event.body) {
    try { return JSON.parse(event.body) } catch (e) { return {} }
  }
  return event.queryStringParameters || {}
}