import {z} from 'zod'

export type GetApiV1BillingUsageSummaryArgs = {start_date: string, end_date: string};

export type GetApiV1BillingUsageSummaryOptions = {baseUrl: string, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const resourceKind = z.enum(["MODEL_DEPLOYMENT", "TRAINING_JOB", "CHAINLET"]);

export const chainMetadataV1 = z.object({chain_id: z.string(), chain_name: z.string().nullable().optional(), chain_deployment_id: z.string()});

export const billableResourceV1 = z.object({id: z.string(), kind: resourceKind, name: z.string().nullable().optional(), model_name: z.string().nullable().optional(), is_deleted: z.boolean(), instance_type: z.string().nullable().optional(), environment_name: z.string().nullable().optional(), chain_metadata: chainMetadataV1.nullable().optional()});

export const dailyDedicatedUsageV1 = z.object({date: z.string(), subtotal: z.union([z.number(), z.string()]), compute_cost: z.union([z.number(), z.string()]), surcharge_cost: z.union([z.number(), z.string()]), minutes: z.number().int(), inference_requests: z.number().int()});

export const dedicatedItemV1 = z.object({billable_resource: billableResourceV1, subtotal: z.union([z.number(), z.string()]), compute_cost: z.union([z.number(), z.string()]), surcharge_cost: z.union([z.number(), z.string()]), minutes: z.number().int(), inference_requests: z.number().int(), daily: z.array(dailyDedicatedUsageV1).optional()});

export const dedicatedUsageV1 = z.object({subtotal: z.union([z.number(), z.string()]), credits_used: z.union([z.number(), z.string()]), total: z.union([z.number(), z.string()]), minutes: z.number().int(), breakdown: z.array(dedicatedItemV1).optional()});

export const dailyTrainingUsageV1 = z.object({date: z.string(), subtotal: z.union([z.number(), z.string()]), minutes: z.number().int()});

export const trainingItemV1 = z.object({billable_resource: billableResourceV1, subtotal: z.union([z.number(), z.string()]), minutes: z.number().int(), daily: z.array(dailyTrainingUsageV1).optional()});

export const trainingUsageV1 = z.object({subtotal: z.union([z.number(), z.string()]), credits_used: z.union([z.number(), z.string()]), total: z.union([z.number(), z.string()]), minutes: z.number().int(), breakdown: z.array(trainingItemV1).optional()});

export const dailyModelApiUsageV1 = z.object({date: z.string(), subtotal: z.union([z.number(), z.string()]), input_tokens: z.number().int(), output_tokens: z.number().int(), cached_input_tokens: z.number().int()});

export const modelApiItemV1 = z.object({model_name: z.string(), model_family: z.string().nullable().optional(), subtotal: z.union([z.number(), z.string()]), input_tokens: z.number().int(), output_tokens: z.number().int(), cached_input_tokens: z.number().int(), daily: z.array(dailyModelApiUsageV1).optional()});

export const modelApisUsageV1 = z.object({subtotal: z.union([z.number(), z.string()]), credits_used: z.union([z.number(), z.string()]), total: z.union([z.number(), z.string()]), breakdown: z.array(modelApiItemV1).optional()});

export const usageSummaryV1 = z.object({dedicated_usage: dedicatedUsageV1.nullable().optional(), training_usage: trainingUsageV1.nullable().optional(), model_apis_usage: modelApisUsageV1.nullable().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
};

/**
 * Gets billing usage summary for a date range
 * 
 * GET /v1/billing/usage_summary
 */
export const getApiV1BillingUsageSummary = async (args: GetApiV1BillingUsageSummaryArgs, options: GetApiV1BillingUsageSummaryOptions) => {
const {baseUrl, fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (args.start_date != null) query.append("start_date", String(args.start_date))
if (args.end_date != null) query.append("end_date", String(args.end_date))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/billing/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(usageSummaryV1, await res.json())
};