package com.superbiz.agent.domain.entity;

import jakarta.persistence.*;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import com.superbiz.agent.domain.enums.FaultCategory;
import com.superbiz.agent.domain.enums.SourceType;

import java.time.LocalDateTime;

/**
 * 案例库实体
 * 对应表: case_library
 */
@Entity
@Table(name = "case_library", indexes = {
    @Index(name = "idx_fault_category", columnList = "fault_category"),
    @Index(name = "idx_error_code", columnList = "error_code"),
    @Index(name = "idx_fault_source", columnList = "fault_source"),
    @Index(name = "idx_diagnosis_id", columnList = "diagnosis_id"),
    @Index(name = "idx_reference_count", columnList = "reference_count"),
    @Index(name = "idx_created_at", columnList = "created_at")
})
@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class CaseLibrary {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(name = "case_id", unique = true, nullable = false, length = 64)
    private String caseId;

    // 来源关联
    @Column(name = "diagnosis_id", length = 64)
    private String diagnosisId;

    @Enumerated(EnumType.STRING)
    @Column(name = "source_type", length = 16, columnDefinition = "VARCHAR(16)")
    private SourceType sourceType = SourceType.AUTO;

    // 案例分类
    @Enumerated(EnumType.STRING)
    @Column(name = "fault_category", length = 32, columnDefinition = "VARCHAR(32)")
    private FaultCategory faultCategory;

    @Column(name = "fault_source", length = 128)
    private String faultSource;

    @Column(name = "fault_target", length = 256)
    private String faultTarget;

    @Column(name = "error_code", length = 64)
    private String errorCode;

    // 案例内容
    @Column(name = "title", nullable = false, length = 256)
    private String title;

    @Column(name = "root_cause", nullable = false, columnDefinition = "TEXT")
    private String rootCause;

    @Column(name = "solution", nullable = false, columnDefinition = "TEXT")
    private String solution;

    // 简单统计
    @Column(name = "reference_count")
    private Integer referenceCount = 0;

    // 元数据
    @Column(name = "created_by", length = 64)
    private String createdBy;

    @Column(name = "created_at", nullable = false, updatable = false)
    private LocalDateTime createdAt;

    @Column(name = "updated_at")
    private LocalDateTime updatedAt;

    @PrePersist
    protected void onCreate() {
        createdAt = LocalDateTime.now();
        updatedAt = LocalDateTime.now();
    }

    @PreUpdate
    protected void onUpdate() {
        updatedAt = LocalDateTime.now();
    }
}