import {z} from 'zod'

export type GetApiApiV1BillingStatementsArgs = {page?: number | undefined, limit?: number | undefined};

export type GetApiApiV1BillingStatementsOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const trustSignedStatement = z.object({id: z.string(), billingPeriodId: z.string().nullable(), artifactType: z.literal("footprint_statement"), statementVersion: z.number().int().gt(0), status: z.enum(["pending", "signing", "signed", "failed", "unavailable"]), period: z.object({start: z.string(), end: z.string()}), usage: z.record(z.string(), z.string()), footprint: z.record(z.string(), z.string()), methodology: z.object({factorVersions: z.array(z.string()), waterFactorVersions: z.array(z.string()), layers: z.record(z.string(), z.unknown()).nullable()}), statementUrl: z.string().nullable(), verificationUrl: z.string().nullable(), signedAt: z.string().nullable(), createdAt: z.string(), supersededByStatementId: z.string().nullable()});

export const paginationMeta = z.object({page: z.number().int().gte(0), limit: z.number().int().gt(0), total: z.number().int().gte(0), totalPages: z.number().int().gte(0)});

export const getApiApiV1BillingStatementsResponse = z.object({success: z.literal(true), data: z.array(trustSignedStatement), pagination: paginationMeta});

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 footprint statements
 * 
 * GET /api/v1/billing/statements
 * 
 * Also accepts auth: apiKey
 */
export const getApiApiV1BillingStatements = async (args: GetApiApiV1BillingStatementsArgs, options?: GetApiApiV1BillingStatementsOptions) => {
const {baseUrl = "https://api.crbonfree.com", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.page != null) query.append("page", String(args.page))
if (args.limit != null) query.append("limit", String(args.limit))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/billing/statements${query.size > 0 ? `?${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(getApiApiV1BillingStatementsResponse, await res.json())
};