pipeline {
    agent any

    environment {
        GITEA_TOKEN      = credentials('gitea')
        JAVA_HOME        = tool 'java17'
        GRADLE_USER_HOME = "${WORKSPACE}/.gradle"
    }

    options {
        timestamps()
        disableConcurrentBuilds()
    }

    stages {

        /* ---------------------------------------------------
         * 1. Checkout PR
         * --------------------------------------------------- */
        stage('Checkout PR') {
             steps {
                script {
                    checkout([
                      $class: 'GitSCM',
                      branches: [[name: env.SOURCE_BRANCH]],
                      userRemoteConfigs: [[
                        url: "https://git.sino-assist.com/${REPO_OWNER}/${REPO_NAME}.git",
                        credentialsId: 'gitlab'
                      ]]
                    ])
                }
            }
        }

        /* ---------------------------------------------------
         * 2. 计算变更文件
         * --------------------------------------------------- */
        stage('计算增量变更') {
            steps {
                script {
                    sh """
                        git fetch origin ${TARGET_BRANCH}
                        git diff --name-only origin/${TARGET_BRANCH}...HEAD > changed_files.txt
                    """

                    def diff = readFile('changed_files.txt').trim()
                    if (!diff) {
                        echo "✅ 无代码变更，跳过扫描"
                        currentBuild.result = 'SUCCESS'
                        return
                    }

                    env.CHANGED_FILES = diff
                    echo "变更文件：\\n${env.CHANGED_FILES}"
                }
            }
        }

        /* ---------------------------------------------------
         * 3. 解析 Gradle 增量模块
         * --------------------------------------------------- */
        stage('Gradle 增量编译') {
            tools {
                jdk "java17"
                gradle 'gradle'
            }
            steps {
                script {
                    def modules = sh(
                        script: '''
                        awk -F/ '
                        {
                          if (NF >= 2) {
                            module=":"$1
                            for (i=2; i<=NF-1; i++) {
                              if ($i == "src") break
                              module=module":"$i
                            }
                            print module
                          }
                        }' changed_files.txt | sort -u
                        ''',
                        returnStdout: true
                    ).trim()

                    if (!modules) {
                        modules = ":classes"
                    }

                    echo "✅ 受影响模块：\\n${modules}"

                    def tasks = modules
                        .split("\\n")
                        .collect { "${it}:classes" }
                        .join(" ")

                    sh """
                        gradle ${tasks} \
                          -x test \
                          --parallel \
                          --build-cache \
                          --configure-on-demand
                    """
                }
            }
        }

        /* ---------------------------------------------------
         * 4. SonarQube 社区版【增量扫描】
         * --------------------------------------------------- */
        stage('SonarQube 增量扫描（社区版）') {
            tools {
                jdk "java17"
                gradle 'gradle'
            }
            steps {
                script {

                    // 仅扫描 src/main/java 下的变更 Java 文件
                    def sonarIncludes = sh(
                        script: '''
                        grep -E "src/main/java/.*\\.java$" changed_files.txt \
                          | sed 's#^#./#' \
                          | tr '\\n' ','
                        ''',
                        returnStdout: true
                    ).trim()

                    if (!sonarIncludes) {
                        echo "✅ 无 Java 代码变更，跳过 Sonar"
                        return
                    }

                    echo "Sonar 增量扫描文件：\\n${sonarIncludes}"

                    withSonarQubeEnv('sonar-server') {
                        sh """
                        gradle sonar \
                          -Dsonar.projectKey=${REPO_NAME} \
                          -Dsonar.inclusions=${sonarIncludes} \
                          -Dsonar.sourceEncoding=UTF-8 \
                          -Dsonar.gradle.skipCompile=true \
                          -Dsonar.exclusions=**/*
                        """
                    }
                }
            }
        }

        /* ---------------------------------------------------
         * 5. 质量门禁 + PR 反馈
         * --------------------------------------------------- */
        stage('反馈审查结果') {
            steps {
                script {
                    def report = waitForQualityGate()

                    if (report.status != 'OK') {
                        sh """
                        curl -X POST \
                          "https://git.sino-assist.com/api/v1/repos/${REPO_OWNER}/${REPO_NAME}/issues/${PR_ID}/comments" \
                          -H "Authorization: token ${GITEA_TOKEN}" \
                          -H "Content-Type: application/json" \
                          -d '{
                            "body": "❌ SonarQube 社区版增量扫描未通过\\n\\n📊 报告：${report.dashboardUrl}"
                          }'
                        """
                        error "❌ 质量门禁失败"
                    } else {
                        sh """
                        curl -X POST \
                          "https://git.sino-assist.com/api/v1/repos/${REPO_OWNER}/${REPO_NAME}/statuses/${GIT_COMMIT}" \
                          -H "Authorization: token ${GITEA_TOKEN}" \
                          -H "Content-Type: application/json" \
                          -d '{
                            "context": "sonarqube-check",
                            "state": "success",
                            "description": "✅ 社区版增量扫描通过"
                          }'
                        """
                    }
                }
            }
        }
    }
}