package jnpf.dmsService;

import jnpf.dmsEntity.qianpiye.DmsQianpiyeOnlyOfficeConstants;
import jnpf.util.JsonUtil;
import jnpf.util.TicketUtil;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.Map;

/** 校验签批页标注插件调用流程节点接口时携带的 Ticket。 */
@Service
public class DmsQianpiyeTicketService {

    private final TicketParser ticketParser;

    public DmsQianpiyeTicketService() {
        this(TicketUtil::parseTicket);
    }

    DmsQianpiyeTicketService(TicketParser ticketParser) {
        this.ticketParser = ticketParser;
    }

    public TicketContext validate(String ticket) {
        if (!StringUtils.hasText(ticket)) {
            throw new InvalidQianpiyeTicketException();
        }
        Object raw;
        try {
            raw = ticketParser.parse(ticket);
        } catch (RuntimeException e) {
            throw new InvalidQianpiyeTicketException();
        }
        if (!(raw instanceof String) || !StringUtils.hasText((String) raw)) {
            throw new InvalidQianpiyeTicketException();
        }
        Map<?, ?> payload;
        try {
            payload = JsonUtil.getJsonToBean((String) raw, Map.class);
        } catch (RuntimeException e) {
            throw new InvalidQianpiyeTicketException();
        }
        if (payload == null
                || !DmsQianpiyeOnlyOfficeConstants.SCOPE.equals(value(payload, "scope"))
                || !DmsQianpiyeOnlyOfficeConstants.BIZ_MODULE.equals(value(payload, "bizModule"))
                || !DmsQianpiyeOnlyOfficeConstants.BIZ_SCENE.equals(value(payload, "bizScene"))
                || !DmsQianpiyeOnlyOfficeConstants.PLUGIN_GUID.equals(value(payload, "pluginGuid"))) {
            throw new InvalidQianpiyeTicketException();
        }
        return new TicketContext(value(payload, "tenantId"), value(payload, "userId"),
                value(payload, "fileId"), optionalValue(payload, "fileType", "annex"));
    }

    private static String value(Map<?, ?> payload, String key) {
        Object value = payload.get(key);
        if (!(value instanceof String) || !StringUtils.hasText((String) value)) {
            throw new InvalidQianpiyeTicketException();
        }
        return (String) value;
    }

    private static String optionalValue(Map<?, ?> payload, String key, String defaultValue) {
        Object value = payload.get(key);
        if (value == null) return defaultValue;
        if (!(value instanceof String) || !StringUtils.hasText((String) value)) {
            throw new InvalidQianpiyeTicketException();
        }
        return (String) value;
    }

    interface TicketParser {
        Object parse(String ticket);
    }

    public static final class TicketContext {
        private final String tenantId;
        private final String userId;
        private final String fileId;
        private final String fileType;

        TicketContext(String tenantId, String userId, String fileId, String fileType) {
            this.tenantId = tenantId;
            this.userId = userId;
            this.fileId = fileId;
            this.fileType = fileType;
        }

        public String getTenantId() { return tenantId; }
        public String getUserId() { return userId; }
        public String getFileId() { return fileId; }
        public String getFileType() { return fileType; }
    }

    public static class InvalidQianpiyeTicketException extends RuntimeException {
        private static final long serialVersionUID = 1L;

        public InvalidQianpiyeTicketException() {
            super("签批页标注 Ticket 无效");
        }
    }
}