import {z} from 'zod'

export type CompetitiveDto = {url: string, sortBy?: ('duplicate' | 'duplicateRate' | 'competitorUnique' | 'targetUnique' | 'etv' | 'keywordCount' | 'trafficValue' | 'pageCount') | undefined, orderBy?: ('asc' | 'desc') | undefined};

export type CreateApiV1CompetitiveArgs = {body: CompetitiveDto};

export type CreateApiV1CompetitiveOptions = {baseUrl?: string | undefined, XAPIKey?: string | undefined, fetch?: typeof fetch | undefined};

export const competitiveResponseDto = z.object({result: z.boolean(), meta: z.object({consumedCredit: z.number()}), data: z.object({query: z.object({targets: z.array(z.string())}), summary: z.object({totalCount: z.number(), returnedCount: z.number()}), items: z.array(z.object({site: z.object({domain: z.string(), title: z.string()}), metrics: z.object({estimatedTraffic: z.number(), trafficValue: z.number(), keywordCount: z.number(), pageCount: z.number(), duplicateKeywordCount: z.number(), duplicateRate: z.number(), competitorUniqueKeywordCount: z.number(), targetUniqueKeywordCount: z.number()})}))}), errors: z.array(z.string())});

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
};

/**
 * 競合サイト抽出
 * 
 * POST /v1/competitive
 */
export const createApiV1Competitive = async (args: CreateApiV1CompetitiveArgs, options?: CreateApiV1CompetitiveOptions) => {
const {baseUrl = "https://api.rakkokeyword.com", fetch: fetchFn = fetch, XAPIKey} = options ?? {}

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

if (XAPIKey !== undefined) headers.set("X-API-Key", XAPIKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/competitive${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

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

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