pipeline {
  agent none

  options {
    timestamps()
  }

  environment {
    NODE_OPTIONS = '--max_old_space_size=2048'
    APP_VERSION = "1.0.${BUILD_NUMBER}"
    DOCKER_BUILDKIT = '1'
  }

  stages {

    /* =========================
       TESTS
       ========================= */

    stage('Backend: test (main)') {
      when {
        branch 'main'
      }
      agent {
        docker {
          image 'python:3.11-slim'
          args '-u root'
        }
      }
      steps {
        dir('backend') {
          sh '''
            set -e
            python -m venv .venv
            . .venv/bin/activate
            pip install --upgrade pip
            pip install -r requirements-dev.txt
            pytest
          '''
        }
      }
    }


    /* =========================
       DOCKER BUILD
       ========================= */

    stage('Docker: build images') {
      when {
        branch 'main'
      }
      agent any

      steps {
        script {
            env.COMMIT_SHORT = sh(
                script: "git rev-parse --short HEAD",
                returnStdout: true
            ).trim()
            env.COMMIT_AUTHOR = sh(
              script: "git show -s --format=%an HEAD",
              returnStdout: true
            ).trim()
        }

        sh '''
          set -e

          docker build \
            --build-arg APP_VERSION=${APP_VERSION} \
            --build-arg GIT_COMMIT=${COMMIT_SHORT} \
            --build-arg COMMIT_AUTHOR="${COMMIT_AUTHOR}" \
            --build-arg BUILD_NUMBER=${BUILD_NUMBER} \
            -t cafeteria-backend:${BUILD_NUMBER} \
            -t cafeteria-backend:latest \
            ./backend

          docker build \
            -t cafeteria-frontend:${BUILD_NUMBER} \
            -t cafeteria-frontend:latest \
            ./frontend
        '''
      }
    }

    /* =========================
       DEPLOY
       ========================= */

    stage('Deploy (docker compose)') {
      when {
        branch 'main'
      }
      agent any
      environment {
        JENKINS_BASE_URL = 'http://jenkins:8080'
        JENKINS_JOB_NAME = 'Espetos'
      }
      steps {
        withCredentials([
          usernamePassword(
            credentialsId: 'jenkins-api-token',
            usernameVariable: 'JENKINS_USER',
            passwordVariable: 'JENKINS_TOKEN'
          )
        ]) {
          sh '''
            set -e

            echo "Deploying backend ${BUILD_NUMBER}"

            echo "BACKEND_TAG=${BUILD_NUMBER}" > .env
            echo "FRONTEND_TAG=${BUILD_NUMBER}" >> .env

            docker compose up -d
          '''
        }
      }
    }
  }

  post {
    always {
      cleanWs()
    }
  }
}