import {z} from 'zod'

export type GetApiGameGameIdArgs = {gameId: string};

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

export const game = z.object({id: z.string().optional(), pgn: z.string().optional(), white_username: z.string().nullable().optional(), black_username: z.string().nullable().optional(), white_rating: z.number().int().nullable().optional(), black_rating: z.number().int().nullable().optional(), white_result: z.string().nullable().optional(), black_result: z.string().nullable().optional(), time_class: z.string().nullable().optional(), time_control: z.string().nullable().optional(), source: z.string().optional()});

export const gameAnalysisResponse = z.object({gameId: z.string().optional(), status: z.literal("completed").optional(), analysis: z.object({game: game.optional()}).optional(), metadata: z.object({analysisCompletedAt: z.string().optional(), version: z.string().optional()}).optional()});

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
};

/**
 * Retrieve analysis for a submitted game
 * 
 * GET /game/{gameId}
 */
export const getApiGameGameId = async (args: GetApiGameGameIdArgs, options?: GetApiGameGameIdOptions) => {
const {baseUrl = "https://www.chessigma.com/public-api/v1", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/game/${encodeURIComponent(String(args.gameId))}${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(gameAnalysisResponse, await res.json())
};