pipeline {
    agent none

    options {
      timestamps()
    }

    environment {
      CI = 'true'
      NODE_OPTIONS = '--max_old_space_size=2048'

      APP_VERSION    = "1.0.${BUILD_NUMBER}"
    }

    stages {

      stage('Init') {
        agent any
        steps {
          script {
            env.COMMIT_AUTHOR = sh(
              script: "git show -s --format=%an HEAD",
              returnStdout: true
            ).trim()

            env.COMMIT_SHORT = sh(
              script: "git rev-parse --short HEAD",
              returnStdout: true
            ).trim()
          }

          echo "Last commit: ${env.COMMIT_AUTHOR}"
        }
      }


      /* =========================
         BACKEND (Python)
         ========================= */

      stage('Backend: deps') {
        agent {
          docker {
            image 'python:3.12'
            args '-u root'
          }
        }
        steps {
          dir('backend') {
            sh '''
            set -e
            python --version
            python -m venv .venv
            . .venv/bin/activate
            pip install --upgrade pip
            pip install -r requirements-dev.txt
            '''
          }
        }
      }

      stage('Backend: lint & test') {
        agent {
          docker {
            image 'python:3.12'
            args '-u root'
          }
        }
        steps {
          dir('backend') {
            sh '''
            set -e
            . .venv/bin/activate
            ruff check app tests
            pytest
            '''
          }
        }
      }

      /* =========================
         FRONTEND (Node)
         ========================= */

      stage('Frontend: deps') {
        agent {
          docker {
            image 'node:20'
          }
        }
        steps {
          dir('frontend') {
            sh '''
            set -e
            node --version
            npm --version
            npm install --no-progress --no-audit --prefer-offline
            '''
          }
        }
      }

      stage('Frontend: check & test') {
        agent {
          docker {
            image 'node:20'
          }
        }
        steps {
          dir('frontend') {
            sh '''
            set -e
            npm run check
            '''
          }
        }
      }

      stage('Frontend: build') {
        agent {
          docker {
            image 'node:20'
          }
        }
        steps {
          dir('frontend') {
            sh '''
            set -e
            npm run build
            '''
          }
        }
      }

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

      stage('Docker: build images') {
        when {
          expression {
            fileExists('backend/Dockerfile') &&
            fileExists('frontend/Dockerfile')
          }
        }
      agent any
      steps {
        sh '''
        set -e
        docker version

        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} ./backend

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

      stage('Deploy frontend & backend') {
        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 build ${BUILD_NUMBER}"

          docker rm -f cafeteria-backend cafeteria-frontend 2>/dev/null || true


          docker run -d \
            --name cafeteria-backend \
            -e JENKINS_BASE_URL \
            -e JENKINS_JOB_NAME \
            -e JENKINS_USER \
            -e JENKINS_TOKEN \
            -p 8000:8000 \
            cafeteria-backend:${BUILD_NUMBER}

          docker run -d \
            --name cafeteria-frontend \
            -p 3000:80 \
            cafeteria-frontend:${BUILD_NUMBER}
          '''
        }
        }
      }
    }

    post {
      always {
          script {
            node {
              cleanWs()
            }
          }
      }
    }
  }