import { adminApiClient } from './client'
import type { AxiosError } from 'axios'

export interface FeatureFlag {
  id: string
  key: string
  enabled: boolean
  description?: string | null
  updatedAt: string
}

export interface UpdateFeatureFlagDto {
  enabled: boolean
  description?: string
}

export interface FeatureFlagsApiError {
  message: string
  statusCode?: number
  originalError?: unknown
  name: 'FeatureFlagsApiError'
}

export function createFeatureFlagsApiError(
  message: string,
  statusCode?: number,
  originalError?: unknown
): FeatureFlagsApiError {
  return {
    message,
    statusCode,
    originalError,
    name: 'FeatureFlagsApiError',
  }
}

export function isFeatureFlagsApiError(error: unknown): error is FeatureFlagsApiError {
  return (
    typeof error === 'object' &&
    error !== null &&
    'name' in error &&
    error.name === 'FeatureFlagsApiError'
  )
}

export const featureFlagsApi = {
  getFeatureFlags: async (): Promise<FeatureFlag[]> => {
    try {
      const response = await adminApiClient.get('/api/admin/feature-flags')
      return response.data
    } catch (error) {
      const axiosError = error as AxiosError<{ message?: string }>
      throw createFeatureFlagsApiError(
        axiosError.response?.data?.message || 'Failed to load feature flags',
        axiosError.response?.status,
        error
      )
    }
  },

  getFeatureFlag: async (key: string): Promise<FeatureFlag> => {
    try {
      const response = await adminApiClient.get(`/api/admin/feature-flags/${key}`)
      return response.data
    } catch (error) {
      const axiosError = error as AxiosError<{ message?: string }>
      if (axiosError.response?.status === 404) {
        throw createFeatureFlagsApiError(
          `Feature flag "${key}" not found`,
          axiosError.response.status,
          error
        )
      }
      throw createFeatureFlagsApiError(
        axiosError.response?.data?.message || `Failed to load feature flag ${key}`,
        axiosError.response?.status,
        error
      )
    }
  },

  updateFeatureFlag: async (
    key: string,
    data: UpdateFeatureFlagDto
  ): Promise<FeatureFlag> => {
    try {
      const response = await adminApiClient.put(`/api/admin/feature-flags/${key}`, data)
      return response.data
    } catch (error) {
      const axiosError = error as AxiosError<{ message?: string }>
      if (axiosError.response?.status === 404) {
        throw createFeatureFlagsApiError(
          `Feature flag "${key}" not found`,
          axiosError.response.status,
          error
        )
      }
      throw createFeatureFlagsApiError(
        axiosError.response?.data?.message || `Failed to update feature flag ${key}`,
        axiosError.response?.status,
        error
      )
    }
  },
}