package com.fs.company.service.workflow.execution;

import com.fs.company.service.workflow.QualityScoringService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.util.Map;

/**
 * 统一出站前 8 维质量评分：AI 生成 / fallback / 沉默唤醒等必须评分后才可发送；租户配置话术跳过。
 */
@Service
public class LobsterOutboundQualityGate {

    private static final Logger log = LoggerFactory.getLogger(LobsterOutboundQualityGate.class);

    public static final String VAR_SKIP_QUALITY_SCORE = "_skipQualityScore";
    public static final String VAR_QUALITY_SCORED = "_qualityScoredAtOutbound";
    public static final String VAR_OUTBOUND_SOURCE = "_outboundSource";

    @Autowired(required = false)
    private QualityScoringService qualityScoringService;

    @Value("${lobster.outbound.quality-gate.enabled:true}")
    private boolean enabled;

    public static void markTenantConfiguredScript(Map<String, Object> variables) {
        if (variables == null) {
            return;
        }
        variables.put(VAR_SKIP_QUALITY_SCORE, Boolean.TRUE);
        variables.put(VAR_OUTBOUND_SOURCE, "tenant_script");
    }

    public static void markAiGenerated(Map<String, Object> variables, String source) {
        if (variables == null) {
            return;
        }
        variables.remove(VAR_SKIP_QUALITY_SCORE);
        variables.remove(VAR_QUALITY_SCORED);
        if (source != null && !source.isBlank()) {
            variables.put(VAR_OUTBOUND_SOURCE, source);
        }
    }

    public static void markScoredInEvolution(Map<String, Object> variables) {
        if (variables == null) {
            return;
        }
        variables.put(VAR_QUALITY_SCORED, Boolean.TRUE);
    }

    public static boolean shouldSkip(Map<String, Object> variables) {
        if (variables == null) {
            return false;
        }
        if (Boolean.TRUE.equals(variables.get(VAR_SKIP_QUALITY_SCORE))) {
            return true;
        }
        return Boolean.TRUE.equals(variables.get(VAR_QUALITY_SCORED));
    }

    /**
     * @return 评分通过后的正文；null 表示拦截不发
     */
    public String applyBeforeDeliver(Long companyId, String message, Map<String, Object> variables) {
        if (message == null || message.isBlank()) {
            return message;
        }
        if (!enabled || shouldSkip(variables)) {
            return message;
        }
        if (LobsterMessageTemplateRenderer.isInternalInstructionText(message)) {
            log.warn("[OutboundQualityGate] block internal instruction text companyId={}", companyId);
            return null;
        }
        if (qualityScoringService == null) {
            log.warn("[OutboundQualityGate] QualityScoringService unavailable, block AI outbound companyId={}",
                    companyId);
            return null;
        }

        String userQuestion = resolveUserQuestion(variables);
        String knowledgeBase = variables.get("_uddWebResearch") != null
                ? variables.get("_uddWebResearch").toString() : "";
        String goal = variables.get("_lastOutboundNodeCode") != null
                ? variables.get("_lastOutboundNodeCode").toString()
                : (variables.get("_greetNodeCode") != null ? variables.get("_greetNodeCode").toString() : "");
        String templateHint = variables.get("nodeMessageTemplate") != null
                ? variables.get("nodeMessageTemplate").toString() : "";
        String source = variables.get(VAR_OUTBOUND_SOURCE) != null
                ? variables.get(VAR_OUTBOUND_SOURCE).toString() : "outbound";

        try {
            QualityScoringService.ScoringResult scoring = qualityScoringService.scoreWithRetry(
                    companyId, message, userQuestion, knowledgeBase, goal, templateHint, source, null);
            if (scoring == null) {
                log.warn("[OutboundQualityGate] scoring null, block companyId={}", companyId);
                return null;
            }
            String finalContent = scoring.getFinalContent() != null ? scoring.getFinalContent().trim() : "";
            if (finalContent.isEmpty()) {
                log.warn("[OutboundQualityGate] empty after scoring, block companyId={}", companyId);
                return null;
            }
            if (LobsterMessageTemplateRenderer.isInternalInstructionText(finalContent)) {
                log.warn("[OutboundQualityGate] block instruction-like content after scoring companyId={}", companyId);
                return null;
            }
            if (!scoring.isFinalPassed()) {
                log.warn("[OutboundQualityGate] scoring not passed companyId={} reason={} score={}",
                        companyId, scoring.getReason(), scoring.getFirstScore());
                return null;
            }
            if (variables != null) {
                variables.put(VAR_QUALITY_SCORED, Boolean.TRUE);
                variables.put("_lastOutboundQualityScore", scoring.getFirstScore());
            }
            return finalContent;
        } catch (Exception e) {
            log.warn("[OutboundQualityGate] scoring failed, block companyId={}: {}", companyId, e.getMessage());
            return null;
        }
    }

    private static String resolveUserQuestion(Map<String, Object> variables) {
        if (variables == null) {
            return "";
        }
        for (String key : new String[]{"lastReply", "customerMessage", "_silenceWakeCustomerMessage"}) {
            Object val = variables.get(key);
            if (val != null && !val.toString().isBlank()) {
                String text = val.toString().trim();
                if (text.startsWith("[silence_wakeup]") || text.startsWith("[wait_wake]")) {
                    return "";
                }
                return text;
            }
        }
        return "";
    }
}