#!/usr/bin/env groovy

/*
Calculate the current version by querying a list of assets in a Nexus Repository.
Return '0.0.1' if there are no matching assets.

Jenkins Plugin dependencies:

- HTTP Request
- Plugin Utilty Steps

*/

Map call(Map config = [:], Map queryParams = [:]) {
    Map defaults = [
        nexusBase: 'https://repo.thejimnicholson.com',
        searchAPI: 'service/rest/v1/search'
    ]

    Map queryParamsDefaults = [
        repository: 'tools',
        sort: 'name',
        name: 'tests/test-something*'
    ]

    Map runConfig = defaults + config
    Map query = queryParamsDefaults + queryParams

    nexusURL = runConfig.nexusBase + '/' + runConfig.searchAPI
    nexusSearch = buildUrlWithQueryParams(nexusURL, query)

    response = httpRequest acceptType: 'APPLICATION_JSON',
      contentType: 'APPLICATION_JSON',
      url: nexusSearch,
      wrapAsMultipart: false
    body = response.content
    assets = readJSON text: body
    latest = assets.items.last()
    version = latest.version ?: (latest.name =~ /.*-([0-9\.]+)-([0-9]+)\..*/)[0][1]
    build = latest.version ?: (latest.name =~ /.*-([0-9\.]+)-([0-9]+)\..*/)[0][2]

    if (version == null) {
        // Call the error method and pass a string indicating version was null and name is not parseable
        error('Version was null and name is not parseable')
    }

    if (build == null) {
        unstable("Build number could not be found in latest asset match (${latest.name})")
    }
    build = build ?: env.BUILD_NUMBER
    runConfig.version = version
    runConfig.build = build
    return runConfig
}

/* groovylint-disable-next-line MethodParameterTypeRequired, NoDef */
String buildUrlWithQueryParams(baseUrl, queryParams) {
    url = baseUrl
    if (!queryParams.empty) {
        queryParamsString = queryParams.collect { key, value ->
            "${URLEncoder.encode(key, 'UTF-8')}=${URLEncoder.encode(value, 'UTF-8')}"
        }.join('&')
        url += '?' + queryParamsString
    }
    return url
}