package com.talentcard.server.business.admin;

import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

import com.alibaba.fastjson.JSON;
import com.talentcard.server.business.DatabaseRows;
import com.talentcard.server.business.PageResult;
import com.talentcard.server.business.payment.huifu.HuifuSettlementRecordGateway;
import com.talentcard.server.common.BusinessException;
import com.talentcard.server.common.ErrorCode;
import com.talentcard.server.common.SensitiveDataCrypto;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.talentcard.server.business.merchant.MerchantPaymentReadinessService;
import com.talentcard.server.business.merchant.MerchantSettlementService;
import com.talentcard.server.business.merchant.MerchantTypeCatalog;
import com.talentcard.server.business.merchant.RegionCityCatalog;

/**
 * 后台结算管理。
 *
 * <p>出款由斗拱按结算周期自动完成（核销确认后的钱进商户基本户，次日自动结算到结算卡），
 * 平台不再产生提现记录。后台保留进件、银行卡查询、收款能力快照刷新，以及向通道查询
 * 真实结算记录用于监控每天结了多少到银行卡。
 */
@Service
public class MerchantSettlementAdminService {
    private final JdbcTemplate jdbc;
    private final SensitiveDataCrypto sensitiveDataCrypto;
    private final MerchantPaymentReadinessService readinessService;
    private final HuifuSettlementRecordGateway settlementRecordGateway;
    @org.springframework.beans.factory.annotation.Autowired
    private com.talentcard.server.business.merchant.MerchantOnboardingProgressService progressService;
    @org.springframework.beans.factory.annotation.Autowired
    private com.talentcard.server.business.merchant.MerchantRealnameService realnameService;
    @org.springframework.beans.factory.annotation.Autowired
    private com.talentcard.server.business.merchant.MerchantSettlementService settlementService;

    public Map<String,Object> onboardingProgress(Long id) { return progressService.view(id); }
    /** 后台刷新与商户端走同一条路径：先推进已满足前置条件的开通步骤，再查询回报结果。 */
    public Map<String,Object> refreshOnboarding(Long id, boolean retry) { return settlementService.refreshProgress(id, retry); }
    /** 微信实名认证：平台运营可在后台代为发起；未决申请不会重复提交。 */
    public Map<String,Object> submitRealname(Long id, boolean retry) { return realnameService.submit(id, retry); }
    public MerchantSettlementAdminService(JdbcTemplate jdbc, SensitiveDataCrypto sensitiveDataCrypto, MerchantPaymentReadinessService readinessService, HuifuSettlementRecordGateway settlementRecordGateway) { this.jdbc = jdbc; this.sensitiveDataCrypto = sensitiveDataCrypto; this.readinessService = readinessService; this.settlementRecordGateway = settlementRecordGateway; }

    /**
     * 商家类型筛选项。
     *
     * <p>取值来自后端目录 {@link MerchantTypeCatalog}——前端原来自己抄了一份 8 项的清单，
     * 既有抄错的标签（住宿服务/购房服务/体检服务在目录里只是别名，库里存的是酒店服务/购房优惠/
     * 免费体检），也漏掉了后来新增的类型，导致下拉里有选项筛不出数据、数据里有的类型选不到。
     */
    public List<String> merchantTypes() {
        return MerchantTypeCatalog.all().stream().map(MerchantTypeCatalog.MerchantType::displayName).toList();
    }

    /**
     * 结算记录：钱按结算周期自动划到结算卡之后，「每天结了多少」只能问通道。
     *
     * <p>取各商家当前生效的斗拱子商户号，**按商户号去重后逐个查询**、合并成一条时间倒序的列表。
     * 通道查询失败只影响这一个商户号，不会让整页失败——监控页最重要的是「看得到」。
     *
     * <p><b>为什么按商户号而不是按商家去问</b>：结算流水属于商户号（一个收款主体），不属于商家。
     * 连锁各门店是各自独立的商家、共用同一个收款主体，通道里就是一条流水；按商家逐家去问会把同一条
     * 流水按共用它的商家数重复印出来（7 家共用就是 7 行一模一样的流水号/金额/到账卡），而每家的查询
     * 各自带 {@code limit}，截断后又会把别的流水挤掉——重复与漏行是同一条错。共用时那一行的商家名
     * 把所有共用的商家都列出来（见 {@link #sharedMerchantLabel}），因为流水确实不属于其中任何一家。
     *
     * <p>只查「通道侧收款能力已核实且正常」的商户（{@link MerchantPaymentReadinessService#channelCapabilityNormal}）：
     * 没开通好、或在汇付被关停的商户，查过去也会被通道拒（实测被关闭的子商户回「客户与产品关系已关闭」），
     * 只会让页面每次打开都多一条失败提示。判定共用收款能力那套取值，不在这里另立一套。
     *
     * <p>筛选分两处，因为两类条件属于两边：商家、联系电话、商家类型是**本地商户字段**，先筛掉不匹配的
     * 商户再去问通道——既让查询生效，也顺带少打几次通道；状态是**通道流水的结算状态**（{@code S}/{@code F}/{@code P}），
     * 只能等通道把流水给回来之后再过滤。{@code beginDate}/{@code endDate} 是结算日期的区间（不是商户申请时间）。
     *
     * <p>条数上限跟着通道走：这个接口的 {@code pageSize} 超过 50 会被判为基础参数校验失败，
     * 传 100 时整页一条流水都查不出来。上限在网关里还有一道兜底，这里只是不要再主动越界。
     */
    public Map<String, Object> settlements(String beginDate, String endDate, int size,
                                           String merchantName, String contactMobile, String merchantType, String status) {
        StringBuilder where = new StringBuilder("""
                where a.status = 'approved' and a.provider_huifu_id is not null and a.provider_huifu_id <> ''
                  and a.id = (select max(newest.id) from merchant_onboarding_application newest
                              where newest.merchant_id = a.merchant_id)
                """);
        List<Object> args = new ArrayList<>();
        addLike(where, args, "m.merchant_name", merchantName);
        addLike(where, args, "m.contact_mobile", contactMobile);
        addEqual(where, args, "m.merchant_type", merchantType);
        List<Map<String, Object>> candidates = rows("""
                select a.id as application_id, a.merchant_id, a.provider_huifu_id, m.merchant_name, s.store_name
                from merchant_onboarding_application a
                join merchant m on m.id = a.merchant_id
                join merchant_store s on s.id = a.store_id
                """ + where + " order by a.merchant_id asc", args.toArray());
        // 关键：按**商户号**聚合，而不是按商家。一个商户号就是一个收款主体，结算流水只挂在它上面。
        Map<String, List<Map<String, Object>>> merchantsByHuifuId = new LinkedHashMap<>();
        for (Map<String, Object> candidate : candidates) {
            if (!readinessService.channelCapabilityNormal(((Number) candidate.get("applicationId")).longValue())) continue;
            merchantsByHuifuId.computeIfAbsent(String.valueOf(candidate.get("providerHuifuId")), huifuId -> new ArrayList<>())
                    .add(candidate);
        }
        List<Map<String, Object>> records = new ArrayList<>();
        List<String> failures = new ArrayList<>();
        int limit = Math.min(Math.max(size, 1), HuifuSettlementRecordGateway.PROVIDER_MAX_PAGE_SIZE);
        for (Map.Entry<String, List<Map<String, Object>>> entry : merchantsByHuifuId.entrySet()) {
            String huifuId = entry.getKey();
            String label = sharedMerchantLabel(entry.getValue());
            try {
                HuifuSettlementRecordGateway.SettlementRecords response =
                        settlementRecordGateway.query(huifuId, beginDate, endDate, limit);
                if (!response.succeeded()) {
                    failures.add(label + "：" + response.message());
                    continue;
                }
                for (Map<String, Object> record : decode(response.rawRecords(), entry.getValue().get(0), label)) {
                    if (matchesStatus(record, status)) records.add(record);
                }
            } catch (RuntimeException exception) {
                failures.add(label + "：查询失败");
            }
        }
        records.sort((left, right) -> String.valueOf(right.get("settleDate"))
                .compareTo(String.valueOf(left.get("settleDate"))));
        Map<String, Object> view = new LinkedHashMap<>();
        view.put("beginDate", beginDate);
        view.put("endDate", endDate);
        view.put("records", records.size() > limit ? records.subList(0, limit) : records);
        view.put("total", records.size());
        view.put("failures", failures);
        return view;
    }

    /** 结算状态筛选：值是通道自己的流水状态（{@code S} 已结算 / {@code F} 失败 / {@code P} 处理中），空则全要。 */
    private boolean matchesStatus(Map<String, Object> record, String status) {
        if (status == null || status.isBlank()) return true;
        return status.trim().equalsIgnoreCase(String.valueOf(record.get("status")));
    }

    /**
     * 这一行显示成哪家的。
     *
     * <p>一个商户号可以被多家商家共用（连锁各门店各是一个独立商家，共用一个收款主体），而流水属于
     * 商户号、不属于其中任何一家。只说第一家会误导，只留一个名字又像把别家漏了，所以共用时把商家名
     * 都列出来并注明共用；只有一家时就照常显示那一家。
     */
    private static String sharedMerchantLabel(List<Map<String, Object>> merchants) {
        List<String> names = merchants.stream().map(merchant -> String.valueOf(merchant.get("merchantName")))
                .distinct().toList();
        return names.size() == 1 ? names.get(0) : String.join("、", names) + "（共用收款主体）";
    }

    /** 把通道返回的结算记录 JSON 转成后台要展示的字段；只读展示，不做金额换算以外的加工。 */
    private List<Map<String, Object>> decode(String rawRecords, Map<String, Object> merchant, String merchantLabel) {
        List<Map<String, Object>> decoded = new ArrayList<>();
        if (rawRecords == null || rawRecords.isBlank()) return decoded;
        List<Map<String, Object>> parsed;
        try {
            parsed = JSON.parseObject(rawRecords, new com.alibaba.fastjson.TypeReference<>() { });
        } catch (RuntimeException exception) {
            return decoded;
        }
        if (parsed == null) return decoded;
        for (Map<String, Object> record : parsed) {
            Map<String, Object> row = new LinkedHashMap<>();
            row.put("merchantId", merchant.get("merchantId"));
            // 商家名取聚合出来的那个标签：几家共用同一个商户号时，这一条流水是所有共用商家一起的。
            row.put("merchantName", merchantLabel);
            row.put("storeName", merchant.get("storeName"));
            row.put("providerTransactionNo", record.get("trans_id"));
            row.put("settleDate", record.get("trans_date"));
            row.put("settleAmountCents", cents(record.get("trans_amt")));
            row.put("feeAmountCents", cents(record.get("fee_amt")));
            row.put("settleCycle", record.get("settle_cycle"));
            row.put("status", record.get("trans_stat"));
            row.put("cardMasked", record.get("card_no"));
            row.put("cardHolder", record.get("card_name"));
            decoded.add(row);
        }
        return decoded;
    }

    private Long cents(Object yuan) {
        if (yuan == null) return null;
        return com.talentcard.server.business.payment.huifu.HuifuPayload.amountInCent(String.valueOf(yuan));
    }

    @Transactional(readOnly = true)
    public PageResult<Map<String, Object>> onboardings(int page, int size, String merchantName, String contactMobile, String merchantType, String status, String startDate, String endDate) {
        PageResult<Map<String, Object>> result = page("select a.*, a.merchant_name as onboarding_merchant_name, m.merchant_name as merchant_table_name, m.merchant_type, m.contact_mobile as merchant_table_contact_mobile, s.store_name from merchant_onboarding_application a join merchant m on m.id = a.merchant_id join merchant_store s on s.id = a.store_id", "select count(*) from merchant_onboarding_application a join merchant m on m.id = a.merchant_id join merchant_store s on s.id = a.store_id", "a", page, size, merchantName, contactMobile, merchantType, status, startDate, endDate);
        result.records().forEach(this::useMerchantTableFields);
        return result;
    }
    @Transactional(readOnly = true)
    public Map<String, Object> onboarding(Long id) {
        // 详情是进件当时的存档，所以名称和联系方式都取进件表那一份（a.* 里就有）：这里不选
        // m.merchant_name / m.contact_mobile，同名撞车靠列顺序决定是不可靠的，不选它就没有歧义。
        // 列表的「联系电话」是商户表的筛选条件，两者用途不同，别把列表那套映射套过来。
        // 结算卡按 initial_bank_card_id 左连进来：运营要在这页看到这条进件绑的是哪张卡，
        // 但只取脱敏字段——明文卡号和 card_no_encrypted 都不出接口。
        List<Map<String, Object>> rows = rows("select a.*, a.merchant_name as onboarding_merchant_name, m.merchant_type, s.store_name, c.bank_name as settlement_bank_name, c.branch_name as settlement_branch_name, c.city_code as settlement_city_code, c.card_masked as settlement_card_masked, c.card_tail as settlement_card_tail, c.status as settlement_card_status, c.reject_reason as settlement_card_reject_reason from merchant_onboarding_application a join merchant m on m.id = a.merchant_id join merchant_store s on s.id = a.store_id left join merchant_bank_card c on c.id = a.initial_bank_card_id where a.id = ?", id);
        if (rows.isEmpty()) throw new BusinessException(ErrorCode.NOT_FOUND, "商户进件不存在");
        Map<String, Object> result = rows.get(0);
        // 结算凭证图一列两义（对私=银行卡卡号面、对公=开户许可证），名字取决于主体是哪一个。
        // 判定复用进件那条业务规则，后台不另抄一份。
        result.put("privateSettlement", MerchantSettlementService.isPrivateSettlement(result.get("subjectType"), result.get("companyType")));
        result.put("settlementCityName", bankCardCityName(result.remove("settlementCityCode")));
        if (progressService.supports(result)) result.put("progress", progressService.view(result));
        // 个人主体的历史记录可能使用 individual、personal 或中文类型值；
        // 只要已保存加密身份证号，后台详情均应解密后完整展示。
        String encrypted = String.valueOf(result.get("subjectIdNoEncrypted"));
        if (!encrypted.isBlank() && !"null".equals(encrypted)) result.put("subjectIdNo", sensitiveDataCrypto.decrypt(encrypted));
        return result;
    }
    @Transactional(readOnly = true)
    public PageResult<Map<String, Object>> bankCards(int page, int size, String merchantName, String contactMobile, String merchantType, String status, String startDate, String endDate) {
        PageResult<Map<String, Object>> result = page("select c.*, m.merchant_name, m.merchant_type, m.contact_mobile, s.store_name from merchant_bank_card c join merchant m on m.id = c.merchant_id join merchant_store s on s.id = c.store_id", "select count(*) from merchant_bank_card c join merchant m on m.id = c.merchant_id join merchant_store s on s.id = c.store_id", "c", page, size, merchantName, contactMobile, merchantType, status, startDate, endDate);
        result.records().forEach(row -> {
            // 卡号在库里是密文，解密出来就是完整 PAN。列表只需要展示，所以密文、卡哈希和
            // 明文卡号都不出接口，前端改用后端已生成的 cardMasked。
            row.remove("cardNoEncrypted");
            row.remove("cardHash");
            row.put("cityName", bankCardCityName(row.get("cityCode")));
        });
        return result;
    }
    /** Provider-confirmed settlement and encashment capability of one approved sub-merchant. */
    public Map<String, Object> paymentCapability(Long applicationId) { return readinessService.capability(applicationId); }

    /** Re-reads the provider configuration and stores a fresh capability snapshot. */
    public Map<String, Object> refreshPaymentCapability(Long applicationId) { return readinessService.refresh(applicationId); }

    private PageResult<Map<String, Object>> page(String query, String count, String tableAlias, int page, int size, String merchantName, String contactMobile, String merchantType, String status, String startDate, String endDate) {
        return page(query, count, tableAlias, page, size, merchantName, contactMobile, merchantType, status, startDate, endDate, "");
    }

    private PageResult<Map<String, Object>> page(String query, String count, String tableAlias, int page, int size, String merchantName, String contactMobile, String merchantType, String status, String startDate, String endDate, String extraWhere) {
        int current = Math.max(1, page);
        int limit = Math.min(Math.max(1, size), 100);
        StringBuilder where = new StringBuilder(" where 1 = 1" + extraWhere);
        List<Object> args = new ArrayList<>();
        addLike(where, args, "m.merchant_name", merchantName);
        addLike(where, args, "m.contact_mobile", contactMobile);
        addEqual(where, args, "m.merchant_type", merchantType);
        addEqual(where, args, tableAlias + ".status", status);
        addDate(where, args, tableAlias + ".created_at", startDate, true);
        addDate(where, args, tableAlias + ".created_at", endDate, false);
        List<Object> rowArgs = new ArrayList<>(args);
        rowArgs.add(limit);
        rowArgs.add((current - 1) * limit);
        List<Map<String, Object>> values = rows(query + where + " order by " + tableAlias + ".created_at desc, " + tableAlias + ".id desc limit ? offset ?", rowArgs.toArray());
        Long total = jdbc.queryForObject(count + where, Long.class, args.toArray());
        return new PageResult<>(values, current, limit, total == null ? 0 : total);
    }
    private void addLike(StringBuilder where, List<Object> args, String column, String value) { if (value != null && !value.trim().isEmpty()) { where.append(" and ").append(column).append(" like ?"); args.add("%" + value.trim() + "%"); } }
    private void addEqual(StringBuilder where, List<Object> args, String column, String value) { if (value != null && !value.trim().isEmpty()) { where.append(" and ").append(column).append(" = ?"); args.add(value.trim()); } }
    private void addDate(StringBuilder where, List<Object> args, String column, String value, boolean start) { if (value != null && value.matches("\\d{4}-\\d{2}-\\d{2}")) { where.append(" and ").append(column).append(start ? " >= ?" : " < date_add(?, interval 1 day)"); args.add(value); } }
    /**
     * 把「商家名称 / 联系方式」换成商户表的值。
     *
     * <p>进件表和商户表都有 merchant_name 和 contact_mobile。查询里又带了 {@code a.*}，所以即使给
     * join 出来的列另起别名，同名列依然存在两份，最终取到哪一个取决于驱动返回同名列的顺序——
     * 实测是「先出现的非空值赢」，于是进件表里申请时填的商户名称会盖掉商户表的。而这两个字段的筛选
     * 条件（{@link #page}）用的都是商户表，显示必须跟着筛选走；申请时填的商户名称另以
     * onboardingMerchantName 带出，不丢。
     */
    private void useMerchantTableFields(Map<String, Object> row) {
        row.put("merchantName", row.remove("merchantTableName"));
        row.put("contactMobile", row.remove("merchantTableContactMobile"));
    }

    /**
     * 开户城市代码转「省|市」。
     *
     * <p>未收录的代码原样返回：行政区划是外部数据，宁可把生僻值露出来让运营反馈，也不要猜一个。
     */
    private String bankCardCityName(Object cityCode) {
        String code = cityCode == null ? "" : String.valueOf(cityCode).trim();
        if (code.isEmpty()) return "";
        String name = RegionCityCatalog.provinceCity(code);
        return name.isEmpty() ? code : name;
    }
    private List<Map<String, Object>> rows(String sql, Object... args) { return DatabaseRows.normalize(jdbc.queryForList(sql, args)); }
}