import type { CreateUserReportDto, ReportReasonResponseDto, UserReportResponseDto } from '@/api/generated/models'
import {
  createServiceError,
  errorResult,
  handleServiceError,
  type ServiceCallOptions,
  type ServiceResult,
  shouldBubbleErrorToParent,
  successResult,
} from '@/services/errorHandler'
import { unwrapApiData } from '@/services/apiResponse'
import { getUserReports } from '@/api/generated/user-reports/user-reports'
import { texts } from '@/texts'

// docs/workflows/fa/user-blocking-reporting.md, Flow B — purely
// informational: creating a report never blocks, hides, or notifies
// anyone by itself. It only creates a `pending` row an admin reviews later.

export type ReportReason = ReportReasonResponseDto

export type UserReport = UserReportResponseDto

const userReportsApi = getUserReports()

/**
 * Public, unauthenticated — safe to fetch ahead of time (e.g. when the
 * report menu item is rendered) so the reason list is ready by the time
 * the user opens the report form.
 */
export const LIST_REPORT_REASONS = async (options?: ServiceCallOptions): Promise<ServiceResult<ReportReason[]>> => {
  try {
    const res = await userReportsApi.userReportsControllerListReportReasons()
    const payload = res.data

    if (!payload.success) {
      throw createServiceError(payload.message || texts.chats.listReportReasonsFailed)
    }

    return successResult(unwrapApiData(payload) ?? [])
  } catch (error) {
    const normalizedError = handleServiceError(error, options)

    if (shouldBubbleErrorToParent(options)) {
      throw normalizedError
    }

    return errorResult(normalizedError)
  }
}

/**
 * At least one of `reasonId` / `description` is required — mirrors the
 * backend's `CreateUserReportDto` cross-field rule
 * (`user_reports_content_chk`).
 */
export const REPORT_USER = async (
  reportedId: string,
  payload: { reasonId?: number; description?: string },
  options?: ServiceCallOptions
): Promise<ServiceResult<UserReport>> => {
  try {
    const res = await userReportsApi.userReportsControllerCreate({
      reportedId,
      ...payload,
    })

    const responsePayload = res.data

    if (!responsePayload.success) {
      throw createServiceError(responsePayload.message || texts.chats.submitReportFailed, responsePayload.code)
    }

    const report = unwrapApiData(responsePayload)

    if (!report?.id) {
      throw createServiceError(texts.common.invalidServerResponse)
    }

    return successResult(report)
  } catch (error) {
    const normalizedError = handleServiceError(error, options)

    if (shouldBubbleErrorToParent(options)) {
      throw normalizedError
    }

    return errorResult(normalizedError)
  }
}

/**
 * Reports one specific chat message. The server derives and persists the
 * conversation, sender, and immutable message snapshot; the client cannot
 * forge those moderation fields.
 */
export const REPORT_MESSAGE = async (
  reportedId: string,
  messageId: string,
  payload: { reasonId?: number; description?: string },
  options?: ServiceCallOptions
): Promise<ServiceResult<UserReport>> => {
  try {
    const request: CreateUserReportDto = {
      reportedId,
      messageId,
      ...payload,
    }
    const res = await userReportsApi.userReportsControllerCreate(request)
    const responsePayload = res.data

    if (!responsePayload.success) {
      throw createServiceError(responsePayload.message || texts.chats.submitReportFailed, responsePayload.code)
    }

    const report = unwrapApiData(responsePayload)

    if (!report?.id) {
      throw createServiceError(texts.common.invalidServerResponse)
    }

    return successResult(report)
  } catch (error) {
    const normalizedError = handleServiceError(error, options)

    if (shouldBubbleErrorToParent(options)) {
      throw normalizedError
    }

    return errorResult(normalizedError)
  }
}