import {z} from 'zod'

export type GetApiAppRecommendationsArgs = {businessId?: string | undefined, domain?: string | undefined, status?: string | undefined};

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

export const appRecommendationSchema = z.object({id: z.number().int(), businessId: z.string().nullable(), businessName: z.string().nullable(), domain: z.string(), title: z.string(), rationale: z.string(), direction: z.enum(["increase", "decrease", "hold", "action", "pause", "launch"]), action: z.enum(["budget_adjustment", "program_pause", "program_resume", "program_create"]).nullable(), deltaPct: z.number().int().nullable(), service: z.string().nullable(), confidence: z.string(), status: z.string(), source: z.string(), createdAt: z.string().nullable(), acceptedAt: z.string().nullable(), dismissedAt: z.string().nullable(), outcomeCheckedAt: z.string().nullable(), outcomeWindowDays: z.number().int().nullable(), outcomeMetrics: z.object({}).nullable(), yelpAdsJobId: z.number().int().nullable(), yelpAdsJobStatus: z.string().nullable(), yelpAdsJobProgramRef: z.string().nullable(), yelpAdsJobMessage: z.string().nullable()});

export const getApiAppRecommendationsResponse = z.array(appRecommendationSchema);

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
};

/**
 * List the current user's stored recommendations
 * 
 * GET /app/recommendations
 */
export const getApiAppRecommendations = async (args: GetApiAppRecommendationsArgs, options: GetApiAppRecommendationsOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.businessId != null) query.append("businessId", String(args.businessId))
if (args.domain != null) query.append("domain", String(args.domain))
if (args.status != null) query.append("status", String(args.status))

const url = `${baseUrl.replace(/\/+$/, '')}/app/recommendations${query.size > 0 ? `?${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(getApiAppRecommendationsResponse, await res.json())
};