import {z} from 'zod'

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

export const competitionGrandPrizeResponseDto = z.object({name: z.string(), valueUsd: z.number(), description: z.string().optional(), imageUrl: z.string().optional()});

export const competitionChestTierResponseDto = z.object({tierNumber: z.number(), name: z.string(), keysRequired: z.number(), exchangeId: z.number().optional(), redemptionCode: z.string().optional(), budgetUsd: z.number().optional()});

export const competitionResponse = z.object({id: z.number(), name: z.string(), description: z.string().nullable(), poolHashes: z.array(z.string()), startTime: z.string(), endTime: z.string(), status: z.enum(["PENDING", "ACTIVE", "COMPLETED", "CANCELLED"]), keyThresholdUsd: z.number(), grandPrizeConfig: competitionGrandPrizeResponseDto.nullable(), termsUrl: z.string().nullable(), bannerImageUrl: z.string().nullable(), isActive: z.boolean(), timeRemaining: z.number().nullable(), totalParticipants: z.number(), totalVolume: z.number(), chestTierConfig: z.array(competitionChestTierResponseDto).nullable()});

export const getApiCompetitionActiveResponse = z.union([competitionResponse, z.unknown()]);

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 /competition/active
 * 
 * GET /competition/active
 */
export const getApiCompetitionActive = async (options?: GetApiCompetitionActiveOptions) => {
const {baseUrl = "https://swap-backend.stage.defi.ovh.gala.com", fetch: fetchFn = fetch} = options ?? {}

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

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