package com.xuqm.im.controller;

import com.xuqm.common.model.ApiResponse;
import com.xuqm.im.entity.ImAccountEntity;
import com.xuqm.im.entity.ImGlobalMuteEntity;
import com.xuqm.im.entity.ImGroupEntity;
import com.xuqm.im.entity.ImMessageEntity;
import com.xuqm.im.entity.KeywordFilterEntity;
import com.xuqm.im.entity.WebhookConfigEntity;
import com.xuqm.im.repository.ImAccountRepository;
import com.xuqm.im.repository.ImGroupRepository;
import com.xuqm.im.repository.ImMessageRepository;
import com.xuqm.im.service.ImAccountService;
import com.xuqm.im.service.ImGroupService;
import com.xuqm.im.service.GlobalMuteService;
import com.xuqm.im.service.KeywordFilterService;
import com.xuqm.im.service.MessageService;
import com.xuqm.im.service.OperationLogService;
import com.xuqm.im.service.WebhookConfigService;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.http.ResponseEntity;
import org.springframework.security.core.annotation.AuthenticationPrincipal;
import org.springframework.web.bind.annotation.*;

import java.time.LocalDateTime;
import java.util.List;
import java.util.Map;

@RestController
@RequestMapping("/api/im/admin")
public class ImAdminController {

    private final ImAccountRepository accountRepository;
    private final ImGroupRepository groupRepository;
    private final ImMessageRepository messageRepository;
    private final ImAccountService accountService;
    private final ImGroupService groupService;
    private final MessageService messageService;
    private final WebhookConfigService webhookConfigService;
    private final KeywordFilterService keywordFilterService;
    private final GlobalMuteService globalMuteService;
    private final OperationLogService operationLogService;

    public ImAdminController(ImAccountRepository accountRepository,
                             ImGroupRepository groupRepository,
                             ImMessageRepository messageRepository,
                             ImAccountService accountService,
                             ImGroupService groupService,
                             MessageService messageService,
                             WebhookConfigService webhookConfigService,
                             KeywordFilterService keywordFilterService,
                             GlobalMuteService globalMuteService,
                             OperationLogService operationLogService) {
        this.accountRepository = accountRepository;
        this.groupRepository = groupRepository;
        this.messageRepository = messageRepository;
        this.accountService = accountService;
        this.groupService = groupService;
        this.messageService = messageService;
        this.webhookConfigService = webhookConfigService;
        this.keywordFilterService = keywordFilterService;
        this.globalMuteService = globalMuteService;
        this.operationLogService = operationLogService;
    }

    /** List all registered IM users for the given appId. */
    @GetMapping("/users")
    public ResponseEntity<ApiResponse<Page<ImAccountEntity>>> listUsers(
            @RequestParam String appId,
            @RequestParam(defaultValue = "0") int page,
            @RequestParam(defaultValue = "20") int size) {
        return ResponseEntity.ok(ApiResponse.success(
                accountRepository.findByAppId(appId, PageRequest.of(page, size))));
    }

    /** Ban or unban a user. */
    @PutMapping("/users/{userId}/status")
    public ResponseEntity<ApiResponse<ImAccountEntity>> updateUserStatus(
            @RequestParam String appId,
            @PathVariable String userId,
            @AuthenticationPrincipal String operatorId,
            @RequestBody Map<String, String> body) {
        ImAccountEntity account = accountRepository.findByAppIdAndUserId(appId, userId)
                .orElseThrow(() -> new RuntimeException("User not found"));
        account.setStatus(ImAccountEntity.Status.valueOf(body.get("status").toUpperCase()));
        ImAccountEntity saved = accountRepository.save(account);
        operationLogService.record(appId, operatorId, "UPDATE_USER_STATUS", "ACCOUNT", userId, body.get("status"));
        return ResponseEntity.ok(ApiResponse.success(saved));
    }

    /** List all groups for the given appId. */
    @GetMapping("/groups")
    public ResponseEntity<ApiResponse<List<ImGroupEntity>>> listGroups(@RequestParam String appId) {
        return ResponseEntity.ok(ApiResponse.success(groupRepository.findByAppId(appId)));
    }

    /** Admin registers a new IM user (or returns existing). */
    @PostMapping("/users")
    public ResponseEntity<ApiResponse<ImAccountEntity>> registerUser(
            @RequestParam String appId,
            @AuthenticationPrincipal String operatorId,
            @RequestBody RegisterUserRequest req) {
        accountService.loginOrRegister(appId, req.userId(), req.nickname(), req.avatar());
        ImAccountEntity account = accountRepository.findByAppIdAndUserId(appId, req.userId())
                .orElseThrow();
        operationLogService.record(appId, operatorId, "REGISTER_USER", "ACCOUNT", req.userId(), req.nickname());
        return ResponseEntity.ok(ApiResponse.success(account));
    }

    /** Admin creates a group. */
    @PostMapping("/groups")
    public ResponseEntity<ApiResponse<ImGroupEntity>> createGroup(
            @RequestParam String appId,
            @AuthenticationPrincipal String operatorId,
            @RequestBody CreateGroupRequest req) {
        ImGroupEntity group = groupService.create(appId, req.name(), req.creatorId(), req.memberIds(), "WORK");
        operationLogService.record(appId, operatorId, "CREATE_GROUP", "GROUP", group.getId(), group.getName());
        return ResponseEntity.ok(ApiResponse.success(group));
    }

    /** Fuzzy search users by userId or nickname. */
    @GetMapping("/users/search")
    public ResponseEntity<ApiResponse<List<ImAccountEntity>>> searchUsers(
            @RequestParam String appId,
            @AuthenticationPrincipal String operatorId,
            @RequestParam String keyword,
            @RequestParam(defaultValue = "20") int size) {
        List<ImAccountEntity> results = accountRepository.searchByKeyword(appId, keyword, PageRequest.of(0, size));
        operationLogService.record(appId, operatorId, "SEARCH_USERS", "ACCOUNT", null, keyword);
        return ResponseEntity.ok(ApiResponse.success(results));
    }

    /** Fuzzy search groups by id, name, creator or announcement. */
    @GetMapping("/groups/search")
    public ResponseEntity<ApiResponse<List<ImGroupEntity>>> searchGroups(
            @RequestParam String appId,
            @AuthenticationPrincipal String operatorId,
            @RequestParam String keyword,
            @RequestParam(defaultValue = "20") int size) {
        List<ImGroupEntity> results = groupRepository.searchByKeyword(appId, keyword, PageRequest.of(0, size));
        operationLogService.record(appId, operatorId, "SEARCH_GROUPS", "GROUP", null, keyword);
        return ResponseEntity.ok(ApiResponse.success(results));
    }

    /** Search messages across the application. */
    @GetMapping("/messages/search")
    public ResponseEntity<ApiResponse<Page<ImMessageEntity>>> searchMessages(
            @RequestParam String appId,
            @AuthenticationPrincipal String operatorId,
            @RequestParam(required = false) ImMessageEntity.ChatType chatType,
            @RequestParam(required = false) ImMessageEntity.MsgType msgType,
            @RequestParam(required = false) String keyword,
            @RequestParam(required = false) LocalDateTime startTime,
            @RequestParam(required = false) LocalDateTime endTime,
            @RequestParam(defaultValue = "0") int page,
            @RequestParam(defaultValue = "20") int size) {
        operationLogService.record(appId, operatorId, "SEARCH_MESSAGES", "MESSAGE", null, keyword);
        return ResponseEntity.ok(ApiResponse.success(
                messageRepository.searchByKeyword(
                        appId, chatType, msgType, keyword, startTime, endTime, PageRequest.of(page, size))));
    }

    /** Message statistics for the given appId. */
    @GetMapping("/stats")
    public ResponseEntity<ApiResponse<Map<String, Object>>> stats(
            @RequestParam String appId,
            @AuthenticationPrincipal String operatorId) {
        long totalMessages = messageRepository.countByAppId(appId);
        long totalUsers    = accountRepository.countByAppId(appId);
        long totalGroups   = groupRepository.countByAppId(appId);
        long todayMessages = messageRepository.countTodayByAppId(appId);
        operationLogService.record(appId, operatorId, "VIEW_STATS", "STATS", null, "summary");

        return ResponseEntity.ok(ApiResponse.success(Map.of(
                "totalMessages", totalMessages,
                "totalUsers",    totalUsers,
                "totalGroups",   totalGroups,
                "todayMessages", todayMessages
        )));
    }

    /** Admin queries conversation history between any two users. */
    @GetMapping("/messages")
    public ResponseEntity<ApiResponse<Page<com.xuqm.im.entity.ImMessageEntity>>> history(
            @RequestParam String appId,
            @AuthenticationPrincipal String operatorId,
            @RequestParam String userA,
            @RequestParam String userB,
            @RequestParam(required = false) com.xuqm.im.entity.ImMessageEntity.MsgType msgType,
            @RequestParam(required = false) String keyword,
            @RequestParam(required = false) LocalDateTime startTime,
            @RequestParam(required = false) LocalDateTime endTime,
            @RequestParam(defaultValue = "0") int page,
            @RequestParam(defaultValue = "20") int size) {
        operationLogService.record(appId, operatorId, "VIEW_HISTORY", "MESSAGE", userA + "," + userB, keyword);
        return ResponseEntity.ok(ApiResponse.success(
                messageRepository.findSingleConversationFiltered(
                        appId, userA, userB, msgType, keyword, startTime, endTime, PageRequest.of(page, size))));
    }

    /** Admin revokes an arbitrary message. */
    @PostMapping("/messages/{messageId}/revoke")
    public ResponseEntity<ApiResponse<com.xuqm.im.entity.ImMessageEntity>> adminRevoke(
            @RequestParam String appId,
            @AuthenticationPrincipal String operatorId,
            @PathVariable String messageId) {
        ImMessageEntity revoked = messageService.adminRevoke(appId, messageId);
        operationLogService.record(appId, operatorId, "ADMIN_REVOKE_MESSAGE", "MESSAGE", messageId, null);
        return ResponseEntity.ok(ApiResponse.success(revoked));
    }

    /** Admin force dismisses a group. */
    @DeleteMapping("/groups/{groupId}")
    public ResponseEntity<ApiResponse<Void>> adminDismissGroup(
            @RequestParam String appId,
            @AuthenticationPrincipal String operatorId,
            @PathVariable String groupId) {
        groupService.adminDismiss(groupId);
        operationLogService.record(appId, operatorId, "ADMIN_DISMISS_GROUP", "GROUP", groupId, null);
        return ResponseEntity.ok(ApiResponse.ok());
    }

    @GetMapping("/webhooks")
    public ResponseEntity<ApiResponse<List<WebhookConfigEntity>>> listWebhooks(@RequestParam String appId) {
        return ResponseEntity.ok(ApiResponse.success(webhookConfigService.list(appId)));
    }

    @PostMapping("/webhooks")
    public ResponseEntity<ApiResponse<WebhookConfigEntity>> createWebhook(
            @RequestParam String appId,
            @AuthenticationPrincipal String operatorId,
            @RequestBody WebhookConfigRequest req) {
        WebhookConfigEntity saved = webhookConfigService.create(appId, req.url(), req.secret(), req.enabled());
        operationLogService.record(appId, operatorId, "CREATE_WEBHOOK", "WEBHOOK", saved.getId(), req.url());
        return ResponseEntity.ok(ApiResponse.success(saved));
    }

    @PutMapping("/webhooks/{id}")
    public ResponseEntity<ApiResponse<WebhookConfigEntity>> updateWebhook(
            @RequestParam String appId,
            @PathVariable String id,
            @AuthenticationPrincipal String operatorId,
            @RequestBody WebhookConfigRequest req) {
        WebhookConfigEntity saved = webhookConfigService.update(appId, id, req.url(), req.secret(), req.enabled());
        operationLogService.record(appId, operatorId, "UPDATE_WEBHOOK", "WEBHOOK", id, req.url());
        return ResponseEntity.ok(ApiResponse.success(saved));
    }

    @DeleteMapping("/webhooks/{id}")
    public ResponseEntity<ApiResponse<Void>> deleteWebhook(
            @RequestParam String appId,
            @AuthenticationPrincipal String operatorId,
            @PathVariable String id) {
        webhookConfigService.delete(appId, id);
        operationLogService.record(appId, operatorId, "DELETE_WEBHOOK", "WEBHOOK", id, null);
        return ResponseEntity.ok(ApiResponse.ok());
    }

    @GetMapping("/keyword-filters")
    public ResponseEntity<ApiResponse<List<KeywordFilterEntity>>> listKeywordFilters(@RequestParam String appId) {
        return ResponseEntity.ok(ApiResponse.success(keywordFilterService.list(appId)));
    }

    @PostMapping("/keyword-filters")
    public ResponseEntity<ApiResponse<KeywordFilterEntity>> createKeywordFilter(
            @RequestParam String appId,
            @AuthenticationPrincipal String operatorId,
            @RequestBody KeywordFilterRequest req) {
        KeywordFilterEntity saved = keywordFilterService.add(appId, req.pattern(), req.replacement(), req.action());
        operationLogService.record(appId, operatorId, "CREATE_KEYWORD_FILTER", "KEYWORD_FILTER", saved.getId(), req.pattern());
        return ResponseEntity.ok(ApiResponse.success(saved));
    }

    @PutMapping("/keyword-filters/{id}")
    public ResponseEntity<ApiResponse<KeywordFilterEntity>> updateKeywordFilter(
            @RequestParam String appId,
            @PathVariable String id,
            @AuthenticationPrincipal String operatorId,
            @RequestBody KeywordFilterRequest req) {
        KeywordFilterEntity saved = keywordFilterService.update(appId, id, req.pattern(), req.replacement(), req.action(), req.enabled());
        operationLogService.record(appId, operatorId, "UPDATE_KEYWORD_FILTER", "KEYWORD_FILTER", id, req.pattern());
        return ResponseEntity.ok(ApiResponse.success(saved));
    }

    @DeleteMapping("/keyword-filters/{id}")
    public ResponseEntity<ApiResponse<Void>> deleteKeywordFilter(
            @RequestParam String appId,
            @AuthenticationPrincipal String operatorId,
            @PathVariable String id) {
        keywordFilterService.delete(appId, id);
        operationLogService.record(appId, operatorId, "DELETE_KEYWORD_FILTER", "KEYWORD_FILTER", id, null);
        return ResponseEntity.ok(ApiResponse.ok());
    }

    @GetMapping("/global-mute")
    public ResponseEntity<ApiResponse<ImGlobalMuteEntity>> getGlobalMute(@RequestParam String appId) {
        return ResponseEntity.ok(ApiResponse.success(globalMuteService.get(appId)));
    }

    @PutMapping("/global-mute")
    public ResponseEntity<ApiResponse<ImGlobalMuteEntity>> setGlobalMute(
            @RequestParam String appId,
            @AuthenticationPrincipal String operatorId,
            @RequestParam boolean enabled) {
        ImGlobalMuteEntity saved = globalMuteService.setEnabled(appId, enabled);
        operationLogService.record(appId, operatorId, "SET_GLOBAL_MUTE", "GLOBAL_MUTE", saved.getId(), String.valueOf(enabled));
        return ResponseEntity.ok(ApiResponse.success(saved));
    }

    @GetMapping("/operation-logs")
    public ResponseEntity<ApiResponse<Page<com.xuqm.im.entity.ImOperationLogEntity>>> operationLogs(
            @RequestParam String appId,
            @RequestParam(defaultValue = "0") int page,
            @RequestParam(defaultValue = "20") int size) {
        return ResponseEntity.ok(ApiResponse.success(
                operationLogService.list(appId, PageRequest.of(page, size))));
    }

    public record RegisterUserRequest(String userId, String nickname, String avatar) {}
    public record CreateGroupRequest(String name, String creatorId, List<String> memberIds) {}
    public record WebhookConfigRequest(String url, String secret, Boolean enabled) {}
    public record KeywordFilterRequest(String pattern, String replacement, String action, Boolean enabled) {}
}