// Basic port of https://forge.cadoles.com/Cadoles/cpkg
def call(Map params = [:]) {

    def currentRef = sh(script: 'git rev-parse HEAD', returnStdout: true).trim()
    def baseRef = params.baseRef ? params.baseRef : currentRef
    def distRepo = params.distRepo ? params.distRepo : 'dev'
    def dist = params.dist ? params.dist : 'eole'
    def distVersion = params.distVersion ? params.distVersion : '2.7.0'
    def distBranchName = params.distBranchName ? params.distBranchName : env.GIT_BRANCH
    def gitCredentials = params.gitCredentials ? params.gitCredentials : null
    def gitEmail = params.gitEmail ? params.gitEmail : 'jenkins@cadoles.com'
    def gitUsername = params.gitUsername ? params.gitUsername : 'Jenkins'
    def skipCi = params.skipCi ? params.skipCi : false
    def skipPush = params.skipPush ? params.skipPush: true

    // Define dist branch based on provided informations and base branch name
    def distBranch = "dist/${dist}/${distVersion}/${distBranchName}"

    def result = [:]
    result['distBranch'] = distBranch
    result['distVersion'] = distVersion
    result['distRepo'] = distRepo
    result['distBranchName'] = distBranchName

    def proc = {
        // Add distBranch to fetched refs
        sh("git config --add remote.origin.fetch +refs/heads/${distBranch}:refs/remotes/origin/${distBranch}")

        // Update branches
        sh("git fetch --all")

        // Merge currentRef into distBranch and push
        sh("git checkout -b '${distBranch}' 'origin/${distBranch}'")
        sh("git merge ${currentRef}")

        if (!skipPush) {
            sh("git push")
        } else {
            println("Skipping push. Set skipPush param to 'true' to enable remote repository update.")
        }
        
        // Retrieve last tag matching pattern pkg/${distRepo}/${dist}-${distVersion}/*
        def lastTag = sh(
            script: "git tag -l 'pkg/${distRepo}/${dist}-${distVersion}/*' --sort=v:refname | tail -n 1",
            returnStdout: true,
        )

        result['previousTag'] = lastTag

        println("Last tag is '${lastTag}'")

        // Extract version number from last tag
        def lastVersionNumber = lastTag.split('/').last()
        result['previousVersionNumber'] = lastVersionNumber

        println("Last version number is '${lastVersionNumber}'")

        def versionNumber = incrementVersionNumber(lastVersionNumber)

        println("New version number will be '${versionNumber}'")
        result['newVersionNumber'] = versionNumber

        // Generate tag with incremented version number
        def tag = "pkg/${distRepo}/${dist}-${distVersion}/${versionNumber}"

        result['newTag'] = tag

        def tagComment="Build ${versionNumber} ${distRepo} package for ${dist}-${distVersion}."
        if (skipCi) {
            tagComment += ' [ci skip]'
        }

        sh("git tag -a '${tag}' -m '${tagComment}'")

        // Push tag
        if (!skipPush) {
            sh("git push --tags")
        } else {
            println("Skipping push. Set skipPush param to 'true' to enable remote repository update.")
        }

        // Switch back to previous ref
        sh("git checkout ${currentRef}")
    }

    if (gitCredentials != null) {
        withCredentials([
            usernamePassword(
                credentialsId: gitCredentials, 
                usernameVariable: 'GIT_USERNAME', 
                passwordVariable: 'GIT_PASSWORD'
            )
        ]) {
            def randomUUID = UUID.randomUUID().toString()
            def tmpAskPassScript = pwd(tmp:true) + "/${randomUUID}"
            try {
                node {
                    writeFile(
                        file: tmpAskPassScript,
                        text: '''
                        #!/bin/sh
                        case "$1" in
                        Username*) echo $GIT_USERNAME ;;
                        Password*) echo $GIT_PASSWORD ;;
                        esac
                        '''
                    )
                }
                sh(script: "git config user.email '${gitEmail}'")
                sh(script: "git config user.name '${gitUsername}'")
                sh(script: "chmod +x '${tmpAskPassScript}'")
                withEnv(["GIT_ASKPASS=${tmpAskPassScript}"]) {
                    proc.call()
                }
            } finally {
                sh(script: "rm -f '${tmpAskPassScript}'")
            }
            
        }
    } else {
        proc.call()
    }

    return result
}

def incrementVersionNumber(String versionNumber) {
    // Split versionNumber (typical pattern: <major>.<minor>.<patch>)
    def versionNumberParts = versionNumber.split(/\./)

    // Extract path number
    def patchNumber = versionNumberParts.last()

    // Split patch number (typical pattern: <patch>-<build>)
    def patchNumberParts = patchNumber.split('-')

    // If version number matches pattern <major>.<minor>.<patch>-<build>
    if (patchNumberParts.size() > 1) {
        return versionNumberParts[0..-2].join('.') + '.' + patchNumberParts[0..-2].join('-') + '-' + (patchNumberParts.last().toInteger() + 1)
    } else { // Else version number matches pattern <major>.<minor>.<patch>
        return versionNumberParts[0..-2].join('.') + '.' + (patchNumber.toInteger() + 1)
    }
}