import {z} from 'zod'

export type PublicEmissionsEstimateRequest = {model: string, inputTokensUncached?: number | undefined, inputTokensCached?: number | undefined, inputTokensCacheCreation?: number | undefined, outputTokens?: number | undefined};

export type CreateApiApiV1PublicEmissionsEstimateArgs = {body: PublicEmissionsEstimateRequest};

export type CreateApiApiV1PublicEmissionsEstimateOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const publicEmissionsEstimate = z.object({energyJoules: z.number(), energyKwh: z.number(), co2Kg: z.number(), co2LowerBoundKg: z.number(), co2UpperBoundKg: z.number(), waterLiters: z.number(), waterLowerBoundL: z.number(), waterUpperBoundL: z.number(), waterFactorsVersion: z.string(), modelTier: z.string(), pue: z.number(), gridIntensity: z.number(), uncertaintyPct: z.number(), factorsVersion: z.string()});

export const createApiApiV1PublicEmissionsEstimateResponse = z.object({success: z.literal(true), data: publicEmissionsEstimate});

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
};

/**
 * Estimate CO2e, electricity, and water from token buckets
 * 
 * POST /api/v1/public/emissions-estimate
 */
export const createApiApiV1PublicEmissionsEstimate = async (args: CreateApiApiV1PublicEmissionsEstimateArgs, options?: CreateApiApiV1PublicEmissionsEstimateOptions) => {
const {baseUrl = "https://api.crbonfree.com", fetch: fetchFn = fetch} = options ?? {}

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

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/public/emissions-estimate${query.size > 0 ? `?${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(createApiApiV1PublicEmissionsEstimateResponse, await res.json())
};