import {z} from 'zod'

export type GetApiGoogleAdsPerformanceArgs = {customerId: string, dateRange?: ('LAST_7_DAYS' | 'LAST_14_DAYS' | 'LAST_30_DAYS' | 'LAST_90_DAYS') | undefined};

export type GetApiGoogleAdsPerformanceOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const getApiGoogleAdsPerformanceResponse = z.object({customerId: z.string(), dateRange: z.object({preset: z.string(), startDate: z.string(), endDate: z.string()}), campaigns: z.array(z.object({campaignId: z.string(), name: z.string(), googleAdsCampaignId: z.string().nullable(), campaignType: z.string().nullable(), status: z.string(), impressions: z.number(), clicks: z.number(), cost: z.number(), conversions: z.number(), ctr: z.number(), cpc: z.number(), costPerConversion: z.number(), roas: z.number()})), daily: z.array(z.object({date: z.string(), impressions: z.number(), clicks: z.number(), cost: z.number(), conversions: z.number()}))});

export const validateResponse = async <Output>(
  schema: {
    readonly '~standard': {
      readonly validate: (value: unknown) => ({ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }) | Promise<{ readonly value: Output; readonly issues?: undefined } | { readonly issues: ReadonlyArray<{ readonly message: string; readonly path?: ReadonlyArray<PropertyKey | { readonly key: PropertyKey }> | undefined }> }>
    }
  },
  value: unknown
): Promise<Output> => {
  const result = await schema['~standard'].validate(value)

  if (result.issues !== undefined) {
    const detail = result.issues
      .map(({ message, path }) =>
        path?.length
          ? `${path.map((segment) => String(typeof segment === 'object' ? segment.key : segment)).join('.')}: ${message}`
          : message
      )
      .join('; ')

    throw new Error(`Response does not match the schema: ${detail}`, { cause: { issues: result.issues } })
  }

  return result.value
};

/**
 * Get performance
 * 
 * GET /google-ads/performance
 */
export const getApiGoogleAdsPerformance = async (args: GetApiGoogleAdsPerformanceArgs, options?: GetApiGoogleAdsPerformanceOptions) => {
const {baseUrl = "https://www.fandom.ai/api/v1", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json")

if (args.customerId != null) query.append("customerId", String(args.customerId))
if (args.dateRange != null) query.append("dateRange", String(args.dateRange))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/google-ads/performance${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "GET", headers})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(getApiGoogleAdsPerformanceResponse, await res.json())
};