package jnpf.base.util;

import jnpf.exception.DataException;
import jnpf.util.JsonUtil;
import jnpf.util.TicketUtil;
import java.util.*;

/** 当前附件的可信模板来源；不从文件名推断，不追踪记录子表。 */
public final class UploadTemplateSource {
    public static final String FIELD = "laiyuan_muban_id";
    private UploadTemplateSource() { }

    public static void inherit(Map<String, Object> target, Map<?, ?> source) {
        Object id = source.get(FIELD);
        Object savedAt = source.get("contentSavedAt");
        target.remove(FIELD);
        target.remove("contentSavedAt");
        if (savedAt instanceof Number time && time.longValue() > 0)
            target.put("contentSavedAt", time.longValue());
        if (id instanceof String && !((String) id).isBlank()) target.put(FIELD, id);
    }

    public static Map<String, Object> uploaded(Map<String, Object> file, String tenant, String owner) {
        Object receipt = file.get("uploadReceipt");
        String raw = receipt instanceof String ? TicketUtil.parseTicket((String) receipt) : null;
        Map<?, ?> proof = raw == null ? Collections.emptyMap() : JsonUtil.getJsonToBean(raw, Map.class);
        if (!"upload-edit-source".equals(proof.get("purpose")) || !tenant.equals(proof.get("tenantId"))
                || !owner.equals(proof.get("ownerId")) || !Objects.equals(file.get("fileId"), proof.get("fileId")))
            throw new DataException("无法核验附件来源，请重新选择模板或上传文件");
        Map<String, Object> result = new LinkedHashMap<>();
        for (String key : List.of("fileId", "name", "fileSize", "fileExtension", "url", "contentSavedAt")) result.put(key, proof.get(key));
        inherit(result, proof);
        return result;
    }

    /** 新凭据优先于同fileId的旧关联；未携带新凭据时仅继承服务器已保存/已核验的附件。 */
    public static void normalize(List<Map<String, Object>> files, List<Map<String, Object>> trusted,
                                 String tenant, String owner) {
        for (Map<String, Object> file : files) {
            Map<String, Object> previous = trusted.stream()
                    .filter(old -> Objects.equals(old.get("fileId"), file.get("fileId"))).findFirst().orElse(null);
            if (file.containsKey("uploadReceipt") && (previous == null
                    || !Objects.equals(file.get("uploadReceipt"), previous.get("uploadReceipt")))) {
                inherit(file, uploaded(file, tenant, owner));
            } else inherit(file, previous == null ? Collections.emptyMap() : previous);
        }
    }
}