package jnpf.audit.sdk;

import jnpf.audit.model.AuditEventDTO;

/**
 * 层 3 审计入口（Task 7 Step 4）：业务方唯一入口。
 *
 * <p>{@code record(dto)} = 校验 eventType/actionCode 非空 → {@link AuditContextCollector#fill(AuditEventDTO)}
 * 填充冻结 → {@code sourceLayer} 缺省补 3（层 3 入口默认 sourceLayer=3；调用方已显式传值则不覆盖，见下）
 * → {@link AuditTxHolder#submit(AuditEventDTO, AuditEventPublisher)} 交事务 holder 缓冲
 * （有事务则 afterCommit 才发、回滚不发；无事务直发）。
 *
 * <p>{@code audit.enabled=false} 或当前请求不在 {@link AuditRequestScopeFilter} 允许范围内时，
 * {@code record} 直接 no-op。
 */
public class AuditClient {

    private final AuditContextCollector collector;
    private final AuditEventPublisher publisher;
    private final boolean enabled;
    private final AuditRequestScopeFilter requestScopeFilter;

    public AuditClient(AuditContextCollector collector, AuditEventPublisher publisher, boolean enabled) {
        this(collector, publisher, enabled, new AuditRequestScopeFilter(false, ""));
    }

    public AuditClient(AuditContextCollector collector, AuditEventPublisher publisher, boolean enabled,
                       AuditRequestScopeFilter requestScopeFilter) {
        this.collector = collector;
        this.publisher = publisher;
        this.enabled = enabled;
        this.requestScopeFilter = requestScopeFilter;
    }

    public void record(AuditEventDTO dto) {
        if (!enabled || !requestScopeFilter.acceptsCurrentRequest()) {
            return;
        }
        if (dto == null) {
            throw new IllegalArgumentException("审计事件 dto 不能为空");
        }
        if (isBlank(dto.getEventType())) {
            throw new IllegalArgumentException("eventType 不能为空");
        }
        if (isBlank(dto.getActionCode())) {
            throw new IllegalArgumentException("actionCode 不能为空");
        }
        collector.fill(dto);
        if (dto.getSourceLayer() == null) {
            // 裁定修复 B：本 SDK 是层 3 显式接口入口，语义上 sourceLayer 恒为 3；
            // 调用方未显式传值时在此补齐，否则服务端 validate（sourceLayer 非空硬校验）会拒收该事件。
            // 调用方已显式传值（如上层框架转发已知层号）则尊重不覆盖。
            dto.setSourceLayer(3);
        }
        AuditTxHolder.submit(dto, publisher);
    }

    private static boolean isBlank(String s) {
        return s == null || s.trim().isEmpty();
    }
}