import {z} from 'zod'

export type GetApiApiV1UsageSummaryArgs = {range?: ('7d' | '30d' | '90d' | '365d') | undefined, startDate?: string | undefined, endDate?: string | undefined, projectId?: string | undefined};

export type GetApiApiV1UsageSummaryOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const costCoverage = z.object({reportedEvents: z.number().int().gte(0), totalEvents: z.number().int().gte(0)});

export const usageSummary = z.object({range: z.object({start: z.string(), end: z.string()}), totals: z.object({totalTokens: z.number(), promptTokens: z.number(), completionTokens: z.number(), totalCostUsd: z.number(), requestCount: z.number(), carbonKg: z.number(), electricityKwh: z.number(), waterLiters: z.number(), waterLowerBoundL: z.number(), waterUpperBoundL: z.number(), offsetCostUsd: z.number().nullable(), costCoverage: costCoverage}), chart: z.object({labels: z.array(z.string()), datasets: z.array(z.object({label: z.string(), data: z.array(z.number())})), costCoverage: z.array(costCoverage)})});

export const getApiApiV1UsageSummaryResponse = z.object({success: z.literal(true), data: usageSummary});

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 usage summary
 * 
 * GET /api/v1/usage/summary
 * 
 * Also accepts auth: apiKey
 */
export const getApiApiV1UsageSummary = async (args: GetApiApiV1UsageSummaryArgs, options?: GetApiApiV1UsageSummaryOptions) => {
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.range != null) query.append("range", String(args.range))
if (args.startDate != null) query.append("startDate", String(args.startDate))
if (args.endDate != null) query.append("endDate", String(args.endDate))
if (args.projectId != null) query.append("projectId", String(args.projectId))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/usage/summary${query.size > 0 ? `?${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(getApiApiV1UsageSummaryResponse, await res.json())
};