package com.mydreamjob.safety;

import com.mydreamjob.audit.AuditContext;
import com.mydreamjob.auth.User;
import com.mydreamjob.auth.UserRepository;
import com.mydreamjob.common.api.ApiResponse;
import com.mydreamjob.common.api.PageResponse;
import com.mydreamjob.common.exception.BusinessException;
import com.mydreamjob.common.exception.ErrorCode;
import com.mydreamjob.safety.dto.CreateReportRequest;
import com.mydreamjob.safety.dto.ReportResponse;
import io.swagger.v3.oas.annotations.Operation;
import io.swagger.v3.oas.annotations.responses.ApiResponses;
import io.swagger.v3.oas.annotations.tags.Tag;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.validation.Valid;
import lombok.RequiredArgsConstructor;
import org.springframework.data.domain.Page;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;

/**
 * 举报接口（V33）。
 *
 * <p>身份仅取自 JWT，不接受 reporterUserId。举报人本人或 ADMIN 可查看详情；
 * 被举报人无法看到举报人身份。未登录 401。</p>
 */
@Tag(name = "举报", description = "用户举报与查询")
@RestController
@RequiredArgsConstructor
public class ReportController {

    /** R01-A3：身份只来自安全上下文，不接受请求参数传入的 userId。 */
    private final com.mydreamjob.security.CurrentUserAccessor currentUserAccessor;
    /** R01-A3：requestId 只来自过滤器规范化后的唯一产出点。 */
    private final com.mydreamjob.common.logging.RequestIdAccessor requestIdAccessor;

    private final ReportService reportService;
    private final UserRepository userRepository;

    @Operation(summary = "提交举报",
            description = "targetType=USER 需 targetUserId；targetType=MESSAGE 需 messageId（服务端推导发送者为被举报人）。"
                    + "幂等键重放：同键同请求返回原单 200，同键不同请求 409/9606；待处理重复 409/9603；"
                    + "举报自己 400/9602；限流 429/9609。")
    @ApiResponses({
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "200", description = "OK"),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "400", description = "参数错误（1001/9602/9607）"),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "401", description = "未登录"),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "403", description = "无权访问该消息（2002）"),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "404", description = "目标用户不存在（4001）"),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "409", description = "重复举报/幂等冲突（9603/9606）"),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "429", description = "举报限流（9609）")
    })
    @PostMapping("/reports")
    public ResponseEntity<ApiResponse<ReportResponse>> create(
            @Valid @RequestBody CreateReportRequest req, HttpServletRequest request) {
        Long userId = currentUserAccessor.requireUserId();
        ReportResponse data = reportService.create(userId, req, AuditContext.from(request));
        return ResponseEntity.ok(ApiResponse.ok(data, requestIdAccessor.get(request)));
    }

    /** /reports/me 必须在 /reports/{id} 之前注册（路由回归测试覆盖） */
    @Operation(summary = "我的举报列表",
            description = "仅返回当前用户创建的举报；支持 status/page/size；不含其他举报人信息、联系方式、消息全文。")
    @ApiResponses({
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "200", description = "OK"),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "401", description = "未登录")
    })
    @GetMapping("/reports/me")
    public ResponseEntity<ApiResponse<PageResponse<ReportResponse>>> listMine(
            @RequestParam(required = false) String status,
            @RequestParam(defaultValue = "0") int page,
            @RequestParam(defaultValue = "20") int size,
            HttpServletRequest request) {
        Long userId = currentUserAccessor.requireUserId();
        Page<ReportResponse> result = reportService.listMine(userId, status, page, size);
        return ResponseEntity.ok(ApiResponse.ok(PageResponse.of(
                result.getContent(), result.getTotalElements(), result.getNumber(), result.getSize()),
                requestIdAccessor.get(request)));
    }

    @Operation(summary = "我的举报详情",
            description = "当前举报人本人或 ADMIN 可查看；其他用户 403/2002。"
                    + "ADMIN 可见处置历史与更完整画像；被举报人无法查看举报人身份。")
    @ApiResponses({
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "200", description = "OK"),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "401", description = "未登录"),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "403", description = "非举报人且非 ADMIN（2002）"),
            @io.swagger.v3.oas.annotations.responses.ApiResponse(responseCode = "404", description = "举报不存在（9601）")
    })
    @GetMapping("/reports/{id}")
    public ResponseEntity<ApiResponse<ReportResponse>> getDetail(
            @PathVariable Long id, HttpServletRequest request) {
        Long userId = currentUserAccessor.requireUserId();
        ReportResponse data = reportService.getDetail(userId, id, isAdmin(userId));
        return ResponseEntity.ok(ApiResponse.ok(data, requestIdAccessor.get(request)));
    }

    private boolean isAdmin(Long userId) {
        return userRepository.findById(userId)
                .map(u -> u.getRoles() != null
                        && u.getRoles().stream().anyMatch(r -> r == User.Role.ADMIN))
                .orElse(false);
    }

}