package com.qqflow.engine.domain.ewechat.api;

import cn.hutool.core.io.FileUtil;
import cn.hutool.core.map.MapBuilder;
import cn.hutool.core.map.MapUtil;
import com.qqflow.engine.common.exception.BusinessException;
import com.qqflow.engine.common.util.Assert;
import com.qqflow.engine.domain.ewechat.model.enterprise.req.*;
import com.qqflow.engine.domain.ewechat.model.enterprise.rsp.*;
import lombok.RequiredArgsConstructor;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.Resource;
import org.springframework.http.*;
import org.springframework.stereotype.Component;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.net.URI;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;

/**
 * @author WuWenYi
 * @since 2025/3/17
 */
@Component
@RequiredArgsConstructor
public class EnterpriseWechatApi {
    private static final String BASE_URL = "https://qyapi.weixin.qq.com";

    private final RestTemplate restTemplate;

    private void checkRsp(EnterpriseWechatBaseRsp rsp){
        Assert.notNull(rsp,"返回值为空");
        boolean condition = Objects.equals(null, rsp.getErrcode()) || Objects.equals(rsp.getErrcode(), 0);
        Assert.isTure(condition, rsp.getErrmsg());
    }

    /**
     * 获取企业微信后台推送的ticket
     * suiteId 第三方应用id或者代开发应用模板id。第三方应用以ww或wx开头应用id（对应于旧的以tj开头的套件id）；代开发应用以dk开头
     * @param suiteTicket suite_ticket由企业微信后台定时推送给“指令回调URL”，每十分钟更新一次，见推送suite_ticket。
     * @return 第三方应用凭证(用于获取永久授权码)
     */
    public EnterpriseWechatSuiteAccessTokenRsp getSuiteAccessToken(String suiteId, String suiteSecret, String suiteTicket) {
        EnterpriseWechatSuiteAccessTokenReq req = EnterpriseWechatSuiteAccessTokenReq.of(suiteId, suiteSecret, suiteTicket);
        return this.commonPost("/cgi-bin/service/get_suite_token", req, EnterpriseWechatSuiteAccessTokenRsp.class);
    }

    /** 获取授权信息 */
    public EnterpriseWechatPermanentCodeRsp getPermanentCode(String suiteAccessToken, String authCode){
        Map<String, Object> req = MapBuilder.<String,Object>create().put("auth_code", authCode).build();
        String uri = "/cgi-bin/service/get_permanent_code?suite_access_token=" + suiteAccessToken;
        return this.commonPost(uri, req, EnterpriseWechatPermanentCodeRsp.class);
    }

    /** 获取accesstoken，基本上要调代开发的接口都需要用到这个 */
    public EnterpriseWechatAccessTokenRsp getAccessToken(String corpId, String permanentCode) {
        String uri = "/cgi-bin/gettoken?corpid=" + corpId + "&corpsecret=" + permanentCode;
        return this.commonGet(uri, EnterpriseWechatAccessTokenRsp.class);
    }

    /** 获取成员ID列表（open_userid + 部门ID），支持分页游标 */
    public EnterpriseWechatListIdRsp listUserId(String accessToken, String cursor, Integer limit) {
        EnterpriseWechatListIdReq req = new EnterpriseWechatListIdReq();
        req.setCursor(cursor);
        req.setLimit(limit);
        String uri = "/cgi-bin/user/list_id?access_token=" + accessToken;
        return this.commonPost(uri, req, EnterpriseWechatListIdRsp.class);
    }

    /** 获取部门列表（递归获取指定部门及其子部门，不填id则获取全量） */
    public EnterpriseWechatDepartmentListRsp listDepartment(String accessToken, Long deptId) {
        String uri = "/cgi-bin/department/list?access_token=" + accessToken;
        if (deptId != null) uri += "&id=" + deptId;
        return this.commonGet(uri, EnterpriseWechatDepartmentListRsp.class);
    }

    /** 获取部门成员（仅返回本部门直属成员，不含子部门） */
    public EnterpriseWechatUserListRsp listDepartmentUsers(String accessToken, Long departmentId) {
        String uri = "/cgi-bin/user/simplelist?access_token=" + accessToken + "&department_id=" + departmentId;
        return this.commonGet(uri, EnterpriseWechatUserListRsp.class);
    }

    /** 通过手机号获取userid */
    public EnterpriseWechatUseridByMobileRsp getUseridByMobile(String accessToken, String mobile) {
        EnterpriseWechatUseridByMobileReq req = EnterpriseWechatUseridByMobileReq.of(mobile);
        String uri = "/cgi-bin/user/getuserid?access_token=" + accessToken;
        return this.commonPost(uri, req, EnterpriseWechatUseridByMobileRsp.class);
    }

    /**
     * 添加客服
     * @param name    客服名称
     * @param mediaId 素材ID
     */
    public EnterpriseWechatAddCsRsp addCs(String accessToken, String name, String mediaId) {
        EnterpriseWechatAddCsReq req = EnterpriseWechatAddCsReq.of(name, mediaId);
        String uri = "/cgi-bin/kf/account/add?access_token=" + accessToken;
        return this.commonPost(uri, req, EnterpriseWechatAddCsRsp.class);
    }

    public EnterpriseWechatCsUrlRsp getCsUrl(String accessToken, String csId) {
        EnterpriseWechatCsUrlReq req = EnterpriseWechatCsUrlReq.of(csId, "test1");
        String uri = "/cgi-bin/kf/add_contact_way?access_token=" + accessToken;
        return this.commonPost(uri, req, EnterpriseWechatCsUrlRsp.class);
    }

    public EnterpriseWechatBaseRsp deleteCs(String accessToken, String openKfid) {
        String uri = "/cgi-bin/kf/account/del?access_token=" + accessToken;
        Map<String, String> req = MapUtil.builder("open_kfid", openKfid).build();
        return this.commonPost(uri, req, EnterpriseWechatBaseRsp.class);
    }

    /** 同步消息 */
    public EnterpriseWechatSyncMsgRsp syncMsg(String accessToken, String cursor, String token, String openKfId) {
        EnterpriseWechatSyncMsgReq req = EnterpriseWechatSyncMsgReq.of(cursor, token, openKfId);
        String uri = "/cgi-bin/kf/sync_msg?access_token=" + accessToken;
        return this.commonPost(uri, req, EnterpriseWechatSyncMsgRsp.class);
    }

    /** 获取会话状态 */
    public EnterpriseWechatSessionRsp getSessionState(String accessToken, String openKfId, String userId){
        EnterpriseWechatSessionReq req = EnterpriseWechatSessionReq.of(openKfId, userId);
        String uri = "/cgi-bin/kf/service_state/get?access_token=" + accessToken;
        return this.commonPost(uri, req, EnterpriseWechatSessionRsp.class);
    }

    /** 变更会话状态 */
    public EnterpriseWechatChangeSessionRsp changeSessionState(String accessToken, String openKfId, String userId, Integer serviceState){
        EnterpriseWechatChangeSessionReq req = EnterpriseWechatChangeSessionReq.of(openKfId, userId, serviceState);
        String uri = "/cgi-bin/kf/service_state/trans?access_token=" + accessToken;
        return this.commonPost(uri, req, EnterpriseWechatChangeSessionRsp.class);
    }

    /** 发送回应消息 */
    public EnterpriseWechatSendMsgRsp sendMsgOnEvent(String accessToken, String code, String content){
        EnterpriseWechatSendOnEventMsgReq req = EnterpriseWechatSendOnEventMsgReq.of(code, content);
        String uri = "/cgi-bin/kf/send_msg_on_event?access_token=" + accessToken;
        return this.commonPost(uri, req, EnterpriseWechatSendMsgRsp.class);
    }

    /** 发送客服消息 */
    public EnterpriseWechatSendMsgRsp sendKfMsg(String accessToken, EnterpriseWechatSendMsgReq req){
        String uri = "/cgi-bin/kf/send_msg?access_token=" + accessToken;
        return this.commonPost(uri, req, EnterpriseWechatSendMsgRsp.class);
    }

    /** 发送应用文本消息 */
    public EnterpriseWechatSendTextMsgRsp sendTextMsg(String accessToken, EnterpriseWechatSendTextMsgReq req) {
        String uri = "/cgi-bin/message/send?access_token=" + accessToken;
        return this.commonPost(uri, req, EnterpriseWechatSendTextMsgRsp.class);
    }

    /** 上传素材文件 */
    public EnterpriseWechatUploadRsp upload(String accessToken, String type, File file) {
        return this.upload(accessToken, type, getResource(file.getPath()), (int) file.length());
    }

    public EnterpriseWechatUploadRsp upload(String accessToken, String type, MultipartFile multipartFile) {
        return this.upload(accessToken, type, multipartFile.getResource(), (int) multipartFile.getSize());
    }

    private EnterpriseWechatUploadRsp upload(String accessToken, String type, Resource resource, int fileLength) {
        String url = BASE_URL + "/cgi-bin/media/upload?access_token=" + accessToken + "&type=" + type;
        MultiValueMap<String, Object> body = new LinkedMultiValueMap<>();
        body.add("file", resource);
        HttpHeaders headers = new HttpHeaders();
        headers.set("Content-disposition", "form-data; name=media;filename=" + resource.getFilename() + "; filelength=" + fileLength);
        headers.setContentType(MediaType.MULTIPART_FORM_DATA);

        HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<>(body, headers);
        ResponseEntity<EnterpriseWechatUploadRsp> response = restTemplate.exchange(url, HttpMethod.POST, requestEntity, EnterpriseWechatUploadRsp.class);
        this.checkRsp(response.getBody());
        return response.getBody();
    }

    private static Resource getResource(String path) {
        // 先尝试从 classpath 加载
        Resource resource = new ClassPathResource(path);
        if (resource.exists()) {
            return resource;
        }

        // 如果不存在，再尝试从文件系统加载
        File file = new File(path);
        if (file.exists()) {
            return new FileSystemResource(file);
        }

        throw new IllegalArgumentException("File not found: " + path);
    }

    /** 下载临时素材 */
    public String downloadMedia(String accessToken, String mediaId) {
        String url = BASE_URL + "/cgi-bin/media/get?access_token=" + accessToken + "&media_id=" + mediaId;
        HttpHeaders headers = new HttpHeaders();
        headers.set(HttpHeaders.USER_AGENT, "Mozilla/5.0");

        RequestEntity<Void> request = new RequestEntity<>(headers, HttpMethod.GET, URI.create(url));
        ResponseEntity<byte[]> response = restTemplate.exchange(request, byte[].class);
        Assert.isTure(response.getStatusCode() == HttpStatus.OK, "download media failed");
        // 获取 Content-Disposition 头
        HttpHeaders responseHeaders = response.getHeaders();
        String contentType = responseHeaders.getContentType() != null ? responseHeaders.getContentType().toString() : "";
        if (contentType.contains("application/json")) {
            throw new BusinessException("download media failed,error:" + new String(response.getBody()));
        }
        String fileName = extractFileName(responseHeaders).orElseThrow(() -> new BusinessException("can not get file name"));
        // 保存文件
        FileUtil.writeBytes(response.getBody(),fileName);
        return fileName;
    }

    private static Optional<String> extractFileName(HttpHeaders headers) {
        List<String> dispositions = headers.get(HttpHeaders.CONTENT_DISPOSITION);
        if (dispositions != null) {
            for (String disposition : dispositions) {
                if (disposition.contains("filename=")) {
                    return Optional.of(disposition.split("filename=")[1].replaceAll("\"", ""));
                }
            }
        }
        return Optional.empty();
    }

    private <T extends EnterpriseWechatBaseRsp> T commonPost(String uri, Object req, Class<T> rspClass) {
        String url = BASE_URL + uri;
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        HttpEntity<Object> requestEntity = new HttpEntity<>(req, headers);
        T rsp = restTemplate.postForObject(url, requestEntity, rspClass);
        this.checkRsp(rsp);
        return rsp;
    }

    private <T extends EnterpriseWechatBaseRsp> T commonGet(String uri, Class<T> rspClass) {
        String url = BASE_URL + uri;
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        HttpEntity<Object> requestEntity = new HttpEntity<>(headers);
        ResponseEntity<T> exchange = restTemplate.exchange(url, HttpMethod.GET, requestEntity, rspClass);
        this.checkRsp(exchange.getBody());
        return exchange.getBody();
    }

}