import {
  Body,
  Controller,
  Get,
  HttpException,
  InternalServerErrorException,
  Param,
  Post,
  Put,
  Query,
  UseGuards,
} from "@nestjs/common";
import {
  ApiBearerAuth,
  ApiBody,
  ApiOperation,
  ApiParam,
  ApiResponse,
  ApiTags,
} from "@nestjs/swagger";
import { ExpertFileAssignResultDto } from "src/common/dto/expert-file-assign-result.dto";
import { LocalActorAuthGuard } from "src/auth/guards/actor-local.guard";
import { RolesGuard } from "src/auth/guards/role.guard";
import { Roles } from "src/decorators/roles.decorator";
import { CurrentUser } from "src/decorators/user.decorator";
import { RoleEnum } from "src/Types&Enums/role.enum";
import { ExpertBlameService } from "./expert-blame.service";
import { ListQueryV2Dto } from "src/common/dto/list-query-v2.dto";
import { AllRequestDtoRsV2 } from "./dto/all-request.dto";
import { SubmitReplyDto } from "./dto/reply.dto";
import { ResendRequestDto } from "./dto/resend.dto";

@ApiTags("expert-blame-panel (v2)")
@Controller("v2/expert-blame")
@ApiBearerAuth()
@UseGuards(LocalActorAuthGuard, RolesGuard)
@Roles(RoleEnum.EXPERT, RoleEnum.FIELD_EXPERT)
export class ExpertBlameV2Controller {
  constructor(private readonly expertBlameService: ExpertBlameService) {}

  @Get()
  @ApiOperation({
    summary: "List blame cases for field expert (V2)",
    description:
      "Optional query: `search`, `sortBy` (publicId | createdAt | requestNo | status), `sortOrder`, `page`, `limit`. Without `page`/`limit`, returns the full filtered list.",
  })
  async findAll(
    @CurrentUser() actor: any,
    @Query() query: ListQueryV2Dto,
  ): Promise<AllRequestDtoRsV2> {
    try {
      return await this.expertBlameService.findAllV2(actor, query);
    } catch (error) {
      if (error instanceof HttpException) throw error;
      throw new InternalServerErrorException(
        error instanceof Error ? error.message : "Failed to list blame cases",
      );
    }
  }

  @Get("report/status-counts")
  @ApiOperation({
    summary: "Count blame cases by grouped status bucket (this field expert)",
    description:
      "Counts only files in the acting expert’s portfolio: expertFileActivities (checked or handled), workflow lock, expert decision, or expert-initiated blame. IN_PROGRESS groups OPEN and WAITING_FOR_SECOND_PARTY. Other keys match CaseStatus. Does not include the open WAITING_FOR_EXPERT queue unless this expert has touched the file.",
  })
  async getStatusReportBucketsV2(@CurrentUser() actor: any) {
    try {
      return await this.expertBlameService.getStatusReportBucketsV2(actor);
    } catch (error) {
      if (error instanceof HttpException) throw error;
      throw new InternalServerErrorException(
        error instanceof Error
          ? error.message
          : "Failed to load blame status report",
      );
    }
  }

  @Get(":id")
  @ApiParam({ name: "id", description: "Blame case request id" })
  async findOne(@Param("id") id: string, @CurrentUser() actor: any) {
    try {
      return await this.expertBlameService.findOneV2(id, actor);
    } catch (error) {
      if (error instanceof HttpException) throw error;
      throw new InternalServerErrorException(
        error instanceof Error
          ? error.message
          : "Failed to get blame case details",
      );
    }
  }

  @Post(":id/assign")
  @ApiOperation({
    summary: "Check availability and assign blame case to this expert",
    description:
      "Call before opening a case from the list. Returns `assigned` when the case was free and is now locked to you, `already_assigned_to_you` when you already hold the lock, or **409** with `status=locked` when another expert is reviewing. Does not replace PUT lock — use this for list UI availability.",
  })
  @ApiParam({ name: "id", description: "Blame case request id" })
  @ApiResponse({ status: 200, type: ExpertFileAssignResultDto })
  @ApiResponse({
    status: 409,
    description: "Another expert is processing this case",
    type: ExpertFileAssignResultDto,
  })
  async assignForReview(@Param("id") id: string, @CurrentUser() actor: any) {
    try {
      return await this.expertBlameService.assignBlameCaseForReviewV2(
        id,
        actor,
      );
    } catch (error) {
      if (error instanceof HttpException) throw error;
      throw new InternalServerErrorException(
        error instanceof Error ? error.message : "Failed to assign blame case",
      );
    }
  }

  @Put("lock/:id")
  @ApiOperation({
    summary: "Lock blame case for review (legacy)",
    description:
      "Same assignment logic as POST `:id/assign`, but returns the legacy `{ _id, lock }` shape and maps conflicts to 400 instead of 409.",
    deprecated: true,
  })
  @ApiParam({ name: "id", description: "Blame case request id" })
  async lockRequest(@Param("id") id: string, @CurrentUser() actor: any) {
    try {
      return await this.expertBlameService.lockRequestV2(id, actor);
    } catch (error) {
      if (error instanceof HttpException) throw error;
      throw new InternalServerErrorException(
        error instanceof Error ? error.message : "Failed to lock blame case",
      );
    }
  }

  @Put("reply/resend/:id")
  @ApiParam({ name: "id", description: "Blame case request id" })
  @ApiBody({ type: ResendRequestDto })
  async resendRequest(
    @Param("id") id: string,
    @Body() body: ResendRequestDto,
    @CurrentUser() actor: any,
  ) {
    try {
      return await this.expertBlameService.resendRequestV2(id, body, actor);
    } catch (error) {
      if (error instanceof HttpException) throw error;
      throw new InternalServerErrorException(
        error instanceof Error
          ? error.message
          : "Failed to request document resend",
      );
    }
  }

  @Put("reply/submit/:id")
  @ApiParam({ name: "id", description: "Blame case request id" })
  @ApiBody({ type: SubmitReplyDto })
  async submitReply(
    @Param("id") id: string,
    @Body() body: SubmitReplyDto,
    @CurrentUser() actor: any,
  ) {
    try {
      return await this.expertBlameService.replyRequestV2(id, body, actor);
    } catch (error) {
      if (error instanceof HttpException) throw error;
      throw new InternalServerErrorException(
        error instanceof Error
          ? error.message
          : "Failed to submit expert reply",
      );
    }
  }

  @Put("reply/inPerson/:id")
  @ApiParam({ name: "id", description: "Blame case request id" })
  @ApiBody({ type: SubmitReplyDto })
  async submitInPerson(
    @Param("id") id: string,
    @Body() body: SubmitReplyDto,
    @CurrentUser() actor: any,
  ) {
    try {
      return await this.expertBlameService.submitInPerson(id, actor.sub);
    } catch (error) {
      if (error instanceof HttpException) throw error;
      throw new InternalServerErrorException(
        error instanceof Error
          ? error.message
          : "Failed to submit expert reply for in person",
      );
    }
  }
}