var ssbRef = require('ssb-ref')
var mlib = require('ssb-msgs')

exports.new = function (project, title, text) {
  if (!ssbRef.isLink(project))
    throw new Error('invalid project id')
  var msg = { type: 'issue', project: project }
  if (text == null) {
    text = title
    title = null
  }
  if (title) {
    if (typeof title === 'string')
      msg.title = title
    else
      throw new Error('invalid issue title')
  }
  if (text) {
    if (typeof text === 'string')
      msg.text = text
    else
      throw new Error('invalid issue text')
  }
  return msg
}

exports.edit = function (id, opts) {
  if (!ssbRef.isMsg(id))
    throw new Error('invalid issue id')
  var msg = {
    type: 'issue-edit',
    issue: id
  }
  if (opts.open != null)
    msg.open = opts.open
  if (opts.title != null)
    msg.title = opts.title
  return msg
}

exports.close = function (id) {
  return exports.edit(id, {open: false})
}

exports.reopen = function (id) {
  return exports.edit(id, {open: true})
}

function editMsg(msg, id, open) {
  if (!ssbRef.isMsg(id))
    throw new Error('invalid issue id')
  ;(msg.issues || (msg.issues = [])).push({
    link: id,
    open: open
  })
  return msg
}

exports.reopens = function (msg, id) {
  return editMsg(msg, id, true)
}

exports.closes = function (msg, id) {
  return editMsg(msg, id, false)
}