package com.xuqm.im.service;

import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.util.UriComponentsBuilder;

@Component
public class ImFeatureConfigClient {

    private static final Logger log = LoggerFactory.getLogger(ImFeatureConfigClient.class);
    private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();

    private final RestTemplate restTemplate;

    @Value("${im.tenant-service-url:http://127.0.0.1:8081}")
    private String tenantServiceUrl;

    @Value("${im.internal-token:xuqm-internal-token}")
    private String internalToken;

    public ImFeatureConfigClient() {
        this.restTemplate = new RestTemplate();
    }

    public boolean allowStrangerMessage(String appId) {
        return readConfig(appId).path("allowStrangerMessage").asBoolean(false);
    }

    public boolean allowFriendRequest(String appId) {
        return readConfig(appId).path("allowFriendRequest").asBoolean(true);
    }

    public String friendRequestMode(String appId) {
        JsonNode node = readConfig(appId);
        String mode = node.path("friendRequestMode").asText("");
        String normalized = mode == null ? "" : mode.trim().toUpperCase();
        return switch (normalized) {
            case "DIRECT_ACCEPT", "DISALLOW", "REQUIRE_CONFIRM" -> normalized;
            default -> node.path("allowFriendRequest").asBoolean(true) ? "REQUIRE_CONFIRM" : "DISALLOW";
        };
    }

    public boolean allowGroupJoinRequest(String appId) {
        return readConfig(appId).path("allowGroupJoinRequest").asBoolean(true);
    }

    public boolean blacklistSendSuccess(String appId) {
        return readConfig(appId).path("blacklistSendSuccess").asBoolean(true);
    }

    public int messageRecallMinutes(String appId) {
        return Math.max(readConfig(appId).path("messageRecallMinutes").asInt(2), 0);
    }

    public int historyRetentionDays(String appId) {
        return Math.max(readConfig(appId).path("historyRetentionDays").asInt(7), 1);
    }

    public int conversationPullLimit(String appId) {
        return Math.min(Math.max(readConfig(appId).path("conversationPullLimit").asInt(100), 1), 500);
    }

    public boolean multiClientConversationDeleteSync(String appId) {
        return readConfig(appId).path("multiClientConversationDeleteSync").asBoolean(false);
    }

    public boolean allowMultiDeviceLogin(String appId) {
        return readConfig(appId).path("allowMultiDeviceLogin").asBoolean(true);
    }

    private JsonNode readConfig(String appId) {
        String url = UriComponentsBuilder.fromHttpUrl(tenantServiceUrl)
                .path("/api/internal/sdk/apps/{appId}/services/{platform}/{serviceType}")
                .buildAndExpand(appId, "ANDROID", "IM")
                .toUriString();
        HttpHeaders headers = new HttpHeaders();
        headers.set("X-Internal-Token", internalToken);
        try {
            ResponseEntity<JsonNode> response = restTemplate.exchange(
                    url,
                    HttpMethod.GET,
                    new HttpEntity<>(headers),
                    JsonNode.class
            );
            JsonNode body = response.getBody();
            if (response.getStatusCode().is2xxSuccessful() && body != null && body.path("code").asInt() == 200) {
                String config = body.path("data").path("config").asText("");
                if (!config.isBlank()) {
                    JsonNode node = OBJECT_MAPPER.readTree(config);
                    return node == null ? OBJECT_MAPPER.createObjectNode() : node;
                }
            }
        } catch (Exception e) {
            log.warn("Failed to read IM feature config for appId={}: {}", appId, e.getMessage());
        }
        return OBJECT_MAPPER.createObjectNode();
    }
}