import {
  Controller,
  HttpException,
  InternalServerErrorException,
  Param,
  Post,
  Patch,
  Body,
  UseGuards,
  Get,
  UseInterceptors,
  UploadedFile,
} from "@nestjs/common";
import { ApiBearerAuth, ApiParam, ApiTags, ApiOperation, ApiResponse, ApiBody, ApiConsumes } from "@nestjs/swagger";
import { FileInterceptor } from "@nestjs/platform-express";
import { diskStorage } from "multer";
import { extname } from "path";
import { GlobalGuard } from "src/auth/guards/global.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 { ClaimRequestManagementService } from "./claim-request-management.service";
import { SelectOuterPartsV2Dto, SelectOuterPartsV2ResponseDto } from "./dto/select-outer-parts-v2.dto";
import { SelectOtherPartsV2Dto, SelectOtherPartsV2ResponseDto } from "./dto/select-other-parts-v2.dto";
import { GetCaptureRequirementsV2ResponseDto } from "./dto/capture-requirements-v2.dto";
import { UploadRequiredDocumentV2Dto, UploadRequiredDocumentV2ResponseDto } from "./dto/upload-document-v2.dto";
import { CapturePartV2Dto, CapturePartV2ResponseDto } from "./dto/capture-part-v2.dto";
import { GetMyClaimsV2ResponseDto } from "./dto/my-claims-v2.dto";
import { ClaimDetailsV2ResponseDto } from "./dto/claim-details-v2.dto";

@ApiTags("claim-request-management (v2)")
@Controller("v2/claim-request-management")
@ApiBearerAuth()
@UseGuards(GlobalGuard, RolesGuard)
@Roles(RoleEnum.USER)
export class ClaimRequestManagementV2Controller {
  constructor(
    private readonly claimRequestManagementService: ClaimRequestManagementService,
  ) {}

  @Get("requests")
  @ApiOperation({
    summary: "Get My Claims (V2)",
    description: "Get list of all claim requests for the current user.",
  })
  @ApiResponse({
    status: 200,
    description: "List of user claims",
    type: GetMyClaimsV2ResponseDto,
  })
  async getMyClaims(@CurrentUser() user: any): Promise<GetMyClaimsV2ResponseDto> {
    try {
      return await this.claimRequestManagementService.getMyClaimsV2(user.sub);
    } catch (error) {
      if (error instanceof HttpException) throw error;
      throw new InternalServerErrorException(
        error instanceof Error ? error.message : "Failed to get claims list",
      );
    }
  }

  @Get("request/:claimRequestId")
  @ApiParam({
    name: "claimRequestId",
    description: "The claim case ID (MongoDB ObjectId)",
    example: "507f1f77bcf86cd799439011",
  })
  @ApiOperation({
    summary: "Get Claim Details (V2)",
    description: "Get full details of a claim request. Only the claim owner can access.",
  })
  @ApiResponse({
    status: 200,
    description: "Claim details",
    type: ClaimDetailsV2ResponseDto,
  })
  @ApiResponse({
    status: 403,
    description: "User is not the claim owner",
  })
  @ApiResponse({
    status: 404,
    description: "Claim not found",
  })
  async getClaimDetails(
    @Param("claimRequestId") claimRequestId: string,
    @CurrentUser() user: any,
  ): Promise<ClaimDetailsV2ResponseDto> {
    try {
      return await this.claimRequestManagementService.getClaimDetailsV2(
        claimRequestId,
        user.sub,
      );
    } catch (error) {
      if (error instanceof HttpException) throw error;
      throw new InternalServerErrorException(
        error instanceof Error ? error.message : "Failed to get claim details",
      );
    }
  }

  @Post("create-from-blame/:blameRequestId")
  @ApiParam({
    name: "blameRequestId",
    description: "ID of the completed blame case to create claim from",
  })
  async createClaimFromBlame(
    @Param("blameRequestId") blameRequestId: string,
    @CurrentUser() user: any,
  ) {
    try {
      return await this.claimRequestManagementService.createClaimFromBlameV2(
        blameRequestId,
        user.sub,
      );
    } catch (error) {
      if (error instanceof HttpException) throw error;
      throw new InternalServerErrorException(
        error instanceof Error
          ? error.message
          : "Failed to create claim request",
      );
    }
  }

  /**
   * V2 API: Select damaged outer car parts (Step 2 of claim workflow)
   */
  @Patch("select-outer-parts/:claimRequestId")
  @ApiOperation({
    summary: "Select Damaged Outer Car Parts (V2 - Step 2)",
    description: `
**Workflow Step:** SELECT_OUTER_PARTS (Step 2 of Claim)

**Purpose:** User selects which outer car parts (body parts) were damaged in the accident.

**Validations:**
- Claim must exist
- User must be the claim owner (damaged party from blame case)
- Current workflow step must be CLAIM_CREATED
- Parts array must contain at least 1 part
- No duplicate parts allowed
- Parts cannot be re-selected once submitted

**Valid Outer Parts:**
- hood, trunk, roof
- front_right_door, front_left_door, rear_right_door, rear_left_door
- front_bumper, rear_bumper
- front_right_fender, front_left_fender, rear_right_fender, rear_left_fender

**After Success:**
- Workflow moves to: SELECT_OTHER_PARTS (Step 3)
- User can proceed to select non-body parts and provide bank info
    `,
  })
  @ApiParam({
    name: "claimRequestId",
    description: "The claim case ID (MongoDB ObjectId)",
    example: "507f1f77bcf86cd799439011",
  })
  @ApiBody({
    type: SelectOuterPartsV2Dto,
    description: "Array of selected damaged outer parts",
    examples: {
      example1: {
        summary: "Minor front damage",
        value: {
          selectedParts: ["hood", "front_bumper", "front_right_fender"],
        },
      },
      example2: {
        summary: "Side impact damage",
        value: {
          selectedParts: [
            "front_left_door",
            "rear_left_door",
            "front_left_fender",
            "rear_left_fender",
          ],
        },
      },
      example3: {
        summary: "Rear-end collision",
        value: {
          selectedParts: ["rear_bumper", "trunk", "rear_right_fender"],
        },
      },
      example4: {
        summary: "Multiple damage areas",
        value: {
          selectedParts: [
            "hood",
            "front_bumper",
            "front_right_door",
            "rear_bumper",
            "trunk",
          ],
        },
      },
    },
  })
  @ApiResponse({
    status: 200,
    description: "Outer parts selected successfully",
    type: SelectOuterPartsV2ResponseDto,
  })
  @ApiResponse({
    status: 400,
    description: "Invalid workflow step or validation failed",
  })
  @ApiResponse({
    status: 403,
    description: "User is not the claim owner",
  })
  @ApiResponse({
    status: 404,
    description: "Claim case not found",
  })
  @ApiResponse({
    status: 409,
    description: "Outer parts already selected",
  })
  async selectOuterParts(
    @Param("claimRequestId") claimRequestId: string,
    @Body() body: SelectOuterPartsV2Dto,
    @CurrentUser() user: any,
  ): Promise<SelectOuterPartsV2ResponseDto> {
    try {
      return await this.claimRequestManagementService.selectOuterPartsV2(
        claimRequestId,
        body,
        user.sub,
      );
    } catch (error) {
      if (error instanceof HttpException) throw error;
      throw new InternalServerErrorException(
        error instanceof Error
          ? error.message
          : "Failed to select outer parts",
      );
    }
  }

  /**
   * V2 API: Select other damaged parts and provide bank information (Step 3 of claim workflow)
   */
  @Patch("select-other-parts/:claimRequestId")
  @ApiOperation({
    summary: "Select Other Parts & Bank Information (V2 - Step 3)",
    description: `
**Workflow Step:** SELECT_OTHER_PARTS (Step 3 of Claim)

**Purpose:** User selects non-body damaged parts and provides bank information for payment.

**Validations:**
- Claim must exist
- User must be the claim owner (damaged party from blame case)
- Current workflow step must be SELECT_OTHER_PARTS
- Bank information must not have been submitted previously
- Sheba number must be exactly 24 digits
- National code must be exactly 10 digits

**Valid Other Parts (Optional):**
- engine, suspension, brake_system, electrical
- radiator, transmission, exhaust
- headlight, taillight, mirror, glass

**After Success:**
- Workflow moves to: UPLOAD_REQUIRED_DOCUMENTS (Step 4)
- User can proceed to upload required documents
    `,
  })
  @ApiParam({
    name: "claimRequestId",
    description: "The claim case ID (MongoDB ObjectId)",
    example: "507f1f77bcf86cd799439011",
  })
  @ApiBody({
    type: SelectOtherPartsV2Dto,
    description: "Other parts selection and bank information",
    examples: {
      example1: {
        summary: "Only bank info (no other parts damaged)",
        value: {
          otherParts: [],
          shebaNumber: "123456789012345678901234",
          nationalCodeOfOwner: "1234567890",
        },
      },
      example2: {
        summary: "Engine and suspension damage",
        value: {
          otherParts: ["engine", "suspension"],
          shebaNumber: "123456789012345678901234",
          nationalCodeOfOwner: "1234567890",
        },
      },
      example3: {
        summary: "Multiple systems damaged",
        value: {
          otherParts: ["engine", "brake_system", "electrical", "headlight"],
          shebaNumber: "123456789012345678901234",
          nationalCodeOfOwner: "1234567890",
        },
      },
      example4: {
        summary: "Lighting and glass damage",
        value: {
          otherParts: ["headlight", "taillight", "mirror", "glass"],
          shebaNumber: "123456789012345678901234",
          nationalCodeOfOwner: "1234567890",
        },
      },
    },
  })
  @ApiResponse({
    status: 200,
    description: "Other parts and bank information saved successfully",
    type: SelectOtherPartsV2ResponseDto,
  })
  @ApiResponse({
    status: 400,
    description: "Invalid workflow step or validation failed",
  })
  @ApiResponse({
    status: 403,
    description: "User is not the claim owner",
  })
  @ApiResponse({
    status: 404,
    description: "Claim case not found",
  })
  @ApiResponse({
    status: 409,
    description: "Bank information already submitted",
  })
  async selectOtherParts(
    @Param("claimRequestId") claimRequestId: string,
    @Body() body: SelectOtherPartsV2Dto,
    @CurrentUser() user: any,
  ): Promise<SelectOtherPartsV2ResponseDto> {
    try {
      return await this.claimRequestManagementService.selectOtherPartsV2(
        claimRequestId,
        body,
        user.sub,
      );
    } catch (error) {
      if (error instanceof HttpException) throw error;
      throw new InternalServerErrorException(
        error instanceof Error
          ? error.message
          : "Failed to select other parts",
      );
    }
  }

  /**
   * V2 API: Get capture requirements (documents, angles, parts)
   */
  @Get("capture-requirements/:claimRequestId")
  @ApiOperation({
    summary: "Get Capture Requirements (V2)",
    description: `
**Get list of what needs to be captured:**
- Required documents (13 items)
- Car angles (4 items: front, back, left, right)
- Damaged parts (based on selected outer parts)

Returns status of each item (uploaded/captured or not).
    `,
  })
  @ApiParam({
    name: "claimRequestId",
    description: "The claim case ID (MongoDB ObjectId)",
    example: "507f1f77bcf86cd799439011",
  })
  @ApiResponse({
    status: 200,
    description: "Capture requirements retrieved successfully",
    type: GetCaptureRequirementsV2ResponseDto,
  })
  @ApiResponse({
    status: 403,
    description: "User is not the claim owner",
  })
  @ApiResponse({
    status: 404,
    description: "Claim case not found",
  })
  async getCaptureRequirements(
    @Param("claimRequestId") claimRequestId: string,
    @CurrentUser() user: any,
  ): Promise<GetCaptureRequirementsV2ResponseDto> {
    try {
      return await this.claimRequestManagementService.getCaptureRequirementsV2(
        claimRequestId,
        user.sub,
      );
    } catch (error) {
      if (error instanceof HttpException) throw error;
      throw new InternalServerErrorException(
        error instanceof Error
          ? error.message
          : "Failed to get capture requirements",
      );
    }
  }

  /**
   * V2 API: Upload required document
   */
  @Post("upload-document/:claimRequestId")
  @UseInterceptors(
    FileInterceptor("file", {
      limits: {
        fileSize: 10 * 1024 * 1024, // 10MB
      },
      storage: diskStorage({
        destination: "./files/claim-documents",
        filename: (req, file, callback) => {
          const unique = Date.now();
          const ex = extname(file.originalname);
          const filename = `${file.originalname.split(".")[0]}-${unique}${ex}`;
          callback(null, filename);
        },
      }),
    }),
  )
  @ApiConsumes("multipart/form-data")
  @ApiOperation({
    summary: "Upload Required Document (V2 - Step 4)",
    description: `
**Workflow Step:** UPLOAD_REQUIRED_DOCUMENTS (Step 4 of Claim)

**Upload one of the 13 required documents:**
- car_green_card
- damaged_driving_license_front/back
- damaged_chassis_number, damaged_engine_photo
- damaged_car_card_front/back, damaged_metal_plate
- guilty_driving_license_front/back
- guilty_car_card_front/back, guilty_metal_plate

**When all 13 documents are uploaded:**
- Workflow automatically moves to: CAPTURE_PART_DAMAGES (Step 5)
    `,
  })
  @ApiParam({
    name: "claimRequestId",
    description: "The claim case ID",
    example: "507f1f77bcf86cd799439011",
  })
  @ApiBody({
    schema: {
      type: "object",
      required: ["documentKey", "file"],
      properties: {
        documentKey: {
          type: "string",
          enum: [
            "car_green_card",
            "damaged_driving_license_front",
            "damaged_driving_license_back",
            "damaged_chassis_number",
            "damaged_engine_photo",
            "damaged_car_card_front",
            "damaged_car_card_back",
            "damaged_metal_plate",
            "guilty_driving_license_front",
            "guilty_driving_license_back",
            "guilty_car_card_front",
            "guilty_car_card_back",
            "guilty_metal_plate",
          ],
          example: "car_green_card",
        },
        file: {
          type: "string",
          format: "binary",
        },
      },
    },
  })
  @ApiResponse({
    status: 200,
    description: "Document uploaded successfully",
    type: UploadRequiredDocumentV2ResponseDto,
  })
  @ApiResponse({
    status: 400,
    description: "Invalid workflow step",
  })
  @ApiResponse({
    status: 409,
    description: "Document already uploaded",
  })
  async uploadDocument(
    @Param("claimRequestId") claimRequestId: string,
    @Body() body: UploadRequiredDocumentV2Dto,
    @UploadedFile() file: Express.Multer.File,
    @CurrentUser() user: any,
  ): Promise<UploadRequiredDocumentV2ResponseDto> {
    try {
      return await this.claimRequestManagementService.uploadRequiredDocumentV2(
        claimRequestId,
        body,
        file,
        user.sub,
      );
    } catch (error) {
      if (error instanceof HttpException) throw error;
      throw new InternalServerErrorException(
        error instanceof Error ? error.message : "Failed to upload document",
      );
    }
  }

  /**
   * V2 API: Capture car angle or damaged part
   */
  @Post("capture-part/:claimRequestId")
  @UseInterceptors(
    FileInterceptor("file", {
      limits: {
        fileSize: 10 * 1024 * 1024, // 10MB
      },
      storage: diskStorage({
        destination: "./files/claim-captures",
        filename: (req, file, callback) => {
          const unique = Date.now();
          const ex = extname(file.originalname);
          const filename = `${file.originalname.split(".")[0]}-${unique}${ex}`;
          callback(null, filename);
        },
      }),
    }),
  )
  @ApiConsumes("multipart/form-data")
  @ApiOperation({
    summary: "Capture Car Angle or Damaged Part (V2 - Step 5)",
    description: `
**Workflow Step:** CAPTURE_PART_DAMAGES (Step 5 of Claim)

**Capture types:**
1. **angle**: Car angles (front, back, left, right) - 4 required
2. **part**: Damaged parts based on selectedParts from Step 2

**All captures must be completed before user can submit claim.**
    `,
  })
  @ApiParam({
    name: "claimRequestId",
    description: "The claim case ID",
    example: "507f1f77bcf86cd799439011",
  })
  @ApiBody({
    schema: {
      type: "object",
      required: ["captureType", "captureKey", "file"],
      properties: {
        captureType: {
          type: "string",
          enum: ["angle", "part"],
          example: "angle",
        },
        captureKey: {
          type: "string",
          example: "front",
          description:
            'For angle: front/back/left/right. For part: hood/front_bumper/etc.',
        },
        file: {
          type: "string",
          format: "binary",
        },
      },
    },
  })
  @ApiResponse({
    status: 200,
    description: "Capture saved successfully",
    type: CapturePartV2ResponseDto,
  })
  @ApiResponse({
    status: 400,
    description: "Invalid workflow step",
  })
  async capturePart(
    @Param("claimRequestId") claimRequestId: string,
    @Body() body: CapturePartV2Dto,
    @UploadedFile() file: Express.Multer.File,
    @CurrentUser() user: any,
  ): Promise<CapturePartV2ResponseDto> {
    try {
      return await this.claimRequestManagementService.capturePartV2(
        claimRequestId,
        body,
        file,
        user.sub,
      );
    } catch (error) {
      if (error instanceof HttpException) throw error;
      throw new InternalServerErrorException(
        error instanceof Error ? error.message : "Failed to capture part",
      );
    }
  }
}