import { Body, Controller, Get, Header, Param, Headers, Patch, Put, UseGuards, Query, Res } from "@nestjs/common";
import {
  ApiBearerAuth,
  ApiBody,
  ApiOperation,
  ApiParam,
  ApiPropertyOptional,
  ApiQuery,
  ApiResponse,
  ApiTags,
} from "@nestjs/swagger";
import { IsOptional, IsString } from "class-validator";
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 { ExpertClaimService } from "./expert-claim.service";
import { ClaimSubmitResendV2Dto, SubmitExpertReplyV2Dto } from "./dto/expert-claim-v2.dto";
import { UpdateClaimDamagedPartsV2Dto } from "./dto/update-claim-damaged-parts-v2.dto";
import { FactorValidationV2Dto } from "./dto/factor-validation.dto";
import { ClaimRequestManagementService } from "src/claim-request-management/claim-request-management.service";
import { OuterPartCatalogItemDto } from "src/claim-request-management/dto/select-outer-parts-v2.dto";
import { ClaimVehicleTypeV2 } from "src/static/outer-car-parts-catalog";

class InPersonVisitV2Dto {
  @ApiPropertyOptional({ example: 'Paint damage requires physical inspection' })
  @IsOptional()
  @IsString()
  note?: string;
}

@ApiTags("expert-claim-panel (v2)")
@Controller("v2/expert-claim")
@ApiBearerAuth()
@UseGuards(LocalActorAuthGuard, RolesGuard)
@Roles(RoleEnum.DAMAGE_EXPERT)
export class ExpertClaimV2Controller {
  constructor(
    private readonly expertClaimService: ExpertClaimService,
    private readonly claimRequestManagementService: ClaimRequestManagementService,
  ) {}

  @Get("report/status-counts")
  @ApiOperation({
    summary: "Count claim cases by grouped status bucket (tenant)",
    description:
      "IN_PROGRESS groups user-phase statuses before submission is complete (CREATED through CAPTURING_PART_DAMAGES). Other keys match ClaimCaseStatus. Scoped to the insurer in the JWT.",
  })
  async getStatusReportBucketsV2(@CurrentUser() actor: any) {
    return await this.expertClaimService.getStatusReportBucketsV2(actor);
  }

  /**
   * Same catalog as `GET v2/claim-request-management/outer-parts-catalog` so factor/resend payloads use identical part ids.
   */
  @Get("outer-parts-catalog")
  @ApiOperation({
    summary: "Get outer parts catalog (V2)",
    description:
      "Returns outer-damage parts with id/key/side. Optional `carType` filter returns only that type catalog.",
  })
  @ApiResponse({
    status: 200,
    description: "Outer parts catalog",
    type: [OuterPartCatalogItemDto],
  })
  async getOuterPartsCatalog(
    @Query("carType") carType?: ClaimVehicleTypeV2,
  ): Promise<OuterPartCatalogItemDto[]> {
    return this.claimRequestManagementService.getOuterPartsCatalogV2(carType);
  }

  @Get("branches")
  @ApiOperation({
    summary: "List insurer branches for this damage expert (V2)",
    description:
      "Returns branches for the insurance company bound to the expert JWT (`clientKey`). " +
      "Same payload as v1 `GET expert-claim/branches/:insuranceId` — no client id in the URL.",
  })
  @ApiResponse({
    status: 200,
    description:
      "Branch list (name, code, address, city, state, phoneNumber, isActive, …) for daghi / branch selection in expert replies",
  })
  async getInsuranceBranchesV2(@CurrentUser() actor: { clientKey?: string }) {
    return await this.expertClaimService.retrieveInsuranceBranchesV2(actor);
  }

  @Get("requests")
  @ApiOperation({
    summary: "List available claim requests for damage expert",
    description:
      "Returns claims that are WAITING_FOR_DAMAGE_EXPERT and not locked by another expert, this expert's locked/in-progress claims, and claims awaiting factor validation (`status=EXPERT_VALIDATING_REPAIR_FACTORS` or legacy `WAITING_FOR_INSURER_APPROVAL` with UNDER_REVIEW at EXPERT_COST_EVALUATION).",
  })
  async getClaimListV2(@CurrentUser() actor) {
    return await this.expertClaimService.getClaimListV2(actor);
  }

  @Get("request/:claimRequestId")
  @ApiOperation({
    summary: "Get claim request detail for damage expert",
    description:
      "Returns full claim details including captured images, required documents, damage selections, `videoCapture` (from claim-video-capture via media.videoCaptureId), and `blameCase` (linked blameCases document with party video/voice URLs like expert-blame detail). Allowed when status is WAITING_FOR_DAMAGE_EXPERT (if locked, only the locking expert) or when awaiting factor validation.",
  })
  @ApiParam({ name: "claimRequestId" })
  async getClaimDetailV2(
    @Param("claimRequestId") claimRequestId: string,
    @CurrentUser() actor,
  ) {
    return await this.expertClaimService.getClaimDetailV2(claimRequestId, actor);
  }

  @Put("lock/:claimRequestId")
  @ApiOperation({
    summary: "Lock a claim request for review",
    description:
      "Lockable in two queues:\n" +
      "1. **Damage review queue** — claim status `WAITING_FOR_DAMAGE_EXPERT`. Locking advances the claim to `status=EXPERT_REVIEWING`, `claimStatus=UNDER_REVIEW`, `workflow.currentStep=EXPERT_DAMAGE_ASSESSMENT`.\n" +
      "2. **Factor validation queue** — claim status `EXPERT_VALIDATING_REPAIR_FACTORS` (or legacy `WAITING_FOR_INSURER_APPROVAL`) with `claimStatus=UNDER_REVIEW` and `workflow.currentStep=EXPERT_COST_EVALUATION`. Locking only sets the workflow lock fields; status/claimStatus/currentStep are left untouched so the claim stays in the factor-validation queue when the lock expires.\n\n" +
      "Only one expert can hold the lock at a time. Re-locking by the same expert is idempotent.",
  })
  @ApiParam({ name: "claimRequestId" })
  async lockClaimRequestV2(
    @Param("claimRequestId") claimRequestId: string,
    @CurrentUser() actor,
  ) {
    return await this.expertClaimService.lockClaimRequestV2(claimRequestId, actor);
  }

  @Put("reply/submit/:claimRequestId")
  @ApiOperation({
    summary: "Submit expert damage assessment reply",
    description:
      "**Preconditions:** claim locked by this expert (`EXPERT_REVIEWING`). **Unlocks** the claim. Each `parts[]` line needs `partId` (from GET claim detail `damagedParts[].partId`), plus pricing, `daghi`, and optional `factorNeeded`. **Cap:** sum of line `totalPayment` values ≤ 53,000,000 (same limit as factor-validation totals across priced + factor lines). Clears any prior `evaluation.ownerInsurerApproval` / `ownerPricedPartsApproval`.\n\n" +
      "**Frontend routing by `ClaimCaseStatus` (`status`):**\n" +
      "- **All parts `factorNeeded`:** `OWNER_REPAIR_FACTOR_UPLOAD_PENDING`, `claimStatus=NEEDS_REVISION`, `workflow.currentStep=OWNER_UPLOAD_FACTOR_DOCUMENTS`, `workflow.nextStep=EXPERT_COST_EVALUATION` → owner uploads all factors; then `status` becomes **`EXPERT_VALIDATING_REPAIR_FACTORS`**, `claimStatus=UNDER_REVIEW`, `currentStep=EXPERT_COST_EVALUATION` for expert **validate-factors**.\n" +
      "- **Mixed (some priced, some factorNeeded):** `INSURER_REVIEW_MIXED_FACTORS_PENDING`, `claimStatus=NEEDS_REVISION`, `currentStep=INSURER_REVIEW`, `nextStep=OWNER_UPLOAD_FACTOR_DOCUMENTS` → owner must call **owner-insurer-approval/sign** first (priced-line acceptance); `currentStep` then moves to `OWNER_UPLOAD_FACTOR_DOCUMENTS` (same case `status` until factors are done).\n" +
      "- **No factors:** **`INSURER_REVIEW_AWAITING_OWNER_SIGN`**, `claimStatus=APPROVED`, `currentStep=INSURER_REVIEW`, `nextStep=CLAIM_COMPLETED` → owner final sign/reject only.\n\n" +
      "**Legacy rows** may still use `WAITING_FOR_INSURER_APPROVAL` instead of the specific values above.\n\n" +
      "**After the owner fulfilled an expert resend** (`damageExpertResend.fulfilledAt`), this expert **cannot** initiate **another resend**—use **reply/submit**, in-person visit, or **validate-factors** as appropriate.",
  })
  @ApiParam({ name: "claimRequestId" })
  @ApiBody({ type: SubmitExpertReplyV2Dto })
  async submitExpertReplyV2(
    @Param("claimRequestId") claimRequestId: string,
    @Body() body: SubmitExpertReplyV2Dto,
    @CurrentUser() actor,
  ) {
    return await this.expertClaimService.submitExpertReplyV2(claimRequestId, body, actor);
  }

  @Put("reply/resend/:claimRequestId")
  @ApiOperation({
    summary: "Submit expert damage resend request",
    description:
      "Claim must be locked by this expert (`EXPERT_REVIEWING`). Sets `WAITING_FOR_USER_RESEND`, `USER_EXPERT_RESEND`, `NEEDS_REVISION`, clears the lock, and stores `evaluation.damageExpertResend`. " +
      "Owner completes via document/capture endpoints or `POST .../expert-resend/acknowledge` when only instructions were given.\n\n" +
      "**One resend per claim lifecycle:** if the owner has already fulfilled a resend (`damageExpertResend.fulfilledAt`), this endpoint returns **400**—the expert may only submit a priced reply or request in-person visit afterward.",
  })
  @ApiParam({ name: "claimRequestId" })
  @ApiBody({ type: ClaimSubmitResendV2Dto })
  async submitExpertResendV2(
    @Param("claimRequestId") claimRequestId: string,
    @Body() body: ClaimSubmitResendV2Dto,
    @CurrentUser() actor,
  ) {
    return await this.expertClaimService.submitResendDocsV2(claimRequestId, body, actor);
  }

  @Patch(":claimRequestId/visit")
  @ApiOperation({
    summary: "Request in-person visit for claim",
    description:
      "Expert decides the user must come in person. Claim must be locked by this expert. Sets claimStatus to NEEDS_REVISION and unlocks the claim so the user is informed.",
  })
  @ApiParam({ name: "claimRequestId" })
  @ApiBody({ type: InPersonVisitV2Dto, required: false })
  async requestInPersonVisitV2(
    @Param("claimRequestId") claimRequestId: string,
    @Body() body: InPersonVisitV2Dto,
    @CurrentUser() actor,
  ) {
    return await this.expertClaimService.requestInPersonVisitV2(
      claimRequestId,
      actor,
      body?.note,
    );
  }

  @Patch("validate-factors/:claimRequestId")
  @ApiOperation({
    summary: "Validate uploaded repair factors (V2 ClaimCase)",
    description:
      "**Response:** `claimStatus` = `ClaimStatus` (e.g. APPROVED). `caseStatus` = `ClaimCaseStatus` (e.g. COMPLETED vs insurer-review) — they are not interchangeable.\n\n" +
      "**Preconditions:** `status=EXPERT_VALIDATING_REPAIR_FACTORS` (or legacy `WAITING_FOR_INSURER_APPROVAL`), `claimStatus=UNDER_REVIEW`, `workflow.currentStep=EXPERT_COST_EVALUATION`, every `factorNeeded` line has `factorLink`.\n\n" +
      "**Decisions:** each factor line gets `APPROVED` or `REJECTED`. **Every** decided line must include expert-entered `totalPayment` **or** both `price` and `salary` (factor photos are not read for amounts).\n\n" +
      "**Cap (when every factor line is decided):** sum of **all** reply lines (priced parts + factor lines) must be ≤ **53,000,000**; otherwise `PRICE_CAP_ERROR` with message that the maximum acceptable total was exceeded.\n\n" +
      "**Outcomes:**\n" +
      "- **All approved:** `caseStatus=COMPLETED`, `claimStatus=APPROVED`, workflow `CLAIM_COMPLETED` — no owner signature.\n" +
      "- **Any rejected (repriced):** same auto-complete for now (owner acceptance may be added later).\n" +
      "- **Partial batch:** returns pending until every factor line has a non-pending decision (no cap error until the batch is complete).",
  })
  @ApiParam({ name: "claimRequestId" })
  @ApiBody({ type: FactorValidationV2Dto })
  async validateClaimFactorsV2(
    @Param("claimRequestId") claimRequestId: string,
    @Body() body: FactorValidationV2Dto,
    @CurrentUser() actor,
  ) {
    return await this.expertClaimService.validateClaimFactorsV2(
      claimRequestId,
      body,
      actor,
    );
  }

  @Patch("request/:claimRequestId/damaged-parts")
  @ApiOperation({
    summary: "Edit selected damaged parts (V2)",
    description:
      "Damage expert can modify selected damaged parts while claim is in EXPERT_REVIEWING and locked by the same expert.",
  })
  @ApiParam({ name: "claimRequestId" })
  @ApiBody({ type: UpdateClaimDamagedPartsV2Dto })
  async updateClaimDamagedPartsV2(
    @Param("claimRequestId") claimRequestId: string,
    @Body() body: UpdateClaimDamagedPartsV2Dto,
    @CurrentUser() actor,
  ) {
    return await this.expertClaimService.updateClaimDamagedPartsV2(
      claimRequestId,
      body,
      actor,
    );
  }

  @ApiQuery({
    name: "query",
    enum: ["car-capture", "accident"],
    required: true,
  })
  @Get("stream/:id/video")
  @Header("Accept-Ranges", "bytes")
  @Header("Content-Type", "video/mp4")
  async claimStream(
    @Headers() headers,
    @Param("id") id: string,
    @Query("query") query: "car-capture" | "accident",
    @Res() res,
  ) {
    return this.expertClaimService.streamServiceV2(id, query, res, headers);
  }
}