# Description:
#   Get all bugs from JIRA assigned to user
#
# Dependencies:
#   None
#
# Configuration:
#   HUBOT_JIRA_DOMAIN
#   HUBOT_JIRA_USER
#   HUBOT_JIRA_PASSWORD
#   HUBOT_JIRA_ISSUE_TYPES
#   HUBOT_JIRA_ISSUE_PRIORITIES
#
# Commands:
#   hubot list my bugs - Retrieve the list of all a user's bugs from JIRA ('my' is optional)
#   hubot list my bugs about <searchterm> - Retrieve list of all a user's bugs from JIRA where the summary or description field contains <phrase> ('my' is optional)
#   hubot list my <priority> priority bugs  - Retrieve the list of a user's <priority> priority bugs from JIRA ('my' is optional)
#   hubot list my <priority> priority bugs about <phrase> - Retrieve list of all a user's <priority> priority bugs from JIRA where the summary or description field contains <phrase> ('my' is optional)
#
# Author:
#   crcastle

# e.g. "bug|task|sub task|support ticket|new feature|epic"
issueTypes = process.env.HUBOT_JIRA_ISSUE_TYPES
issueTypes or= "bug|task|sub task|support ticket|new feature|epic" #some defaults

# e.g. "blocker|high|medium|minor|trivial"
issuePriorities = process.env.HUBOT_JIRA_ISSUE_PRIORITIES
issuePriorities or= "blocker|high|medium|minor|trivial" #some defaults

# /list( my)?( (blocker|high|medium|minor|trivial)( priority)?)? (bug|task|sub task|support ticket|new feature|epic|issue)s( about (.*))?/i
regexpString = "list( my)?( (" + issuePriorities + ")( priority)?)? (" + issueTypes + "|issue)s( about (.*))?"
regexp = new RegExp(regexpString, "i")

module.exports = (robot) ->

    robot.respond regexp, (msg) ->
        username = if msg.match[1] then msg.message.user.email.split('@')[0] else null
        issueType = if msg.match[5] and msg.match[5] != "issue" then msg.match[5] else null
        msg.send "Searching for issues..."
        getIssues msg, issueType, username, msg.match[3], msg.match[6], (response) ->
            msg.send response

getIssues = (msg, issueType, assignee, priority, phrase, callback) ->
    username = process.env.HUBOT_JIRA_USER
    password = process.env.HUBOT_JIRA_PASSWORD
    domain = process.env.HUBOT_JIRA_DOMAIN

    # do some error handling
    unless username
        msg.send "HUBOT_JIRA_USER environment variable must be set to a valid JIRA user's username."
        return
    unless password
        msg.send "HUBOT_JIRA_PASSWORD environment variable must be set to a valid JIRA user's password."
        return
    unless domain
        msg.send "HUBOT_JIRA_DOMAIN environment variables must be set to a valid <ORG>.jira.com domain."
        return

    jiraTypeList = toJiraTypeList(process.env.HUBOT_JIRA_ISSUE_TYPES.split('|'))
    type = if issueType? then 'issueType="' + issueType + '"' else 'issueType in (' + jiraTypeList + ')'
    user = if assignee? then ' and assignee="' + assignee + '"' else ''
    prio = if priority? then ' and priority=' + priority else ''
    search = if phrase? then ' and (summary~"' + phrase + '" or description~"' + phrase + '")' else ''

    path = '/rest/api/latest/search'
    url = "https://" + domain + path
    queryString = type + ' and status!=closed' + user + prio + search
    auth = "Basic " + new Buffer(username + ':' + password).toString('base64')

    getJSON msg, url, queryString, auth, (err, json) ->
        if err
            msg.send "error getting issue list from JIRA"
            return
        if json.total? and (json.total==0 or json.total=="0")
            msg.send "No issues like that, or you don't have access to see the issues."
        issueList = []
        for issue in json.issues
            getJSON msg, issue.self, null, auth, (err, details) ->
                if err
                    msg.send "error getting issue details from JIRA"
                    return
                issueList.push( {key: details.key, summary: details.fields.summary.value} )
                callback(formatIssueList(issueList, domain)) if issueList.length == json.issues.length

formatIssueList = (issueArray, domain) ->
    formattedIssueList = ""
    for issue in issueArray
        formattedIssueList += issue.summary + " -> https://" + domain + "/browse/" + issue.key + "\n"
    return formattedIssueList

getJSON = (msg, url, query, auth, callback) ->
    msg.http(url)
        .header('Authorization', auth)
        .query(jql: query)
        .get() (err, res, body) ->
            callback( err, JSON.parse(body) )

toJiraTypeList = (arr) ->
    newArr = []
    for issueType in arr
        newArr.push '"' + issueType + '"'
    return newArr.join(',')