import {z} from 'zod'

export type GetApiApiV2ProvidersProviderIdModelsCanonicalPricingArgs = {provider_id: number, canonical: string};

export type GetApiApiV2ProvidersProviderIdModelsCanonicalPricingOptions = {baseUrl?: string | undefined, apiKeyAuth?: string | undefined, appKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const aiGatewayModelPricingEffectiveSource = z.enum(["catalog_auto", "model_override", "unknown"]);

export const aiGatewayModelPricingRates = z.object({cache_read_cost_per_mtok: z.number().gte(0).optional(), cache_write_cost_per_mtok: z.number().gte(0).optional(), non_cached_input_cost_per_mtok: z.number().gte(0).optional(), output_cost_per_mtok: z.number().gte(0).optional()});

export const aiGatewayModelPricingSourceType = z.enum(["catalog", "custom"]);

export const aiGatewayModelPricingSource = z.object({provider_id: z.string().optional(), type: aiGatewayModelPricingSourceType});

export const aiGatewayModelPricingVersion = z.number().int().gte(1).lte(1);

export const aiGatewayModelPricingConfig = z.object({overrides: aiGatewayModelPricingRates.optional(), rates: aiGatewayModelPricingRates.optional(), source: aiGatewayModelPricingSource, version: aiGatewayModelPricingVersion});

export const aiGatewayModelPricingAttributes = z.object({effective_source: aiGatewayModelPricingEffectiveSource.optional(), pricing_config: aiGatewayModelPricingConfig.optional()});

export const aiGatewayModelPricingType = z.literal("model-pricing");

export const aiGatewayModelPricingResponseData = z.object({attributes: aiGatewayModelPricingAttributes, id: z.string(), type: aiGatewayModelPricingType});

export const aiGatewayModelPricingResponse = z.object({data: aiGatewayModelPricingResponseData});

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 a model pricing override
 * 
 * GET /api/v2/providers/{provider_id}/models/{canonical}/pricing
 * 
 * Also accepts auth: AuthZ
 */
export const getApiApiV2ProvidersProviderIdModelsCanonicalPricing = async (args: GetApiApiV2ProvidersProviderIdModelsCanonicalPricingArgs, options?: GetApiApiV2ProvidersProviderIdModelsCanonicalPricingOptions) => {
const {baseUrl = "https://api.datadoghq.com", fetch: fetchFn = fetch, apiKeyAuth, appKeyAuth} = options ?? {}

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

if (apiKeyAuth !== undefined) headers.set("DD-API-KEY", apiKeyAuth)
if (appKeyAuth !== undefined) headers.set("DD-APPLICATION-KEY", appKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v2/providers/${encodeURIComponent(String(args.provider_id))}/models/${encodeURIComponent(String(args.canonical))}/pricing${query.size > 0 ? `?${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(aiGatewayModelPricingResponse, await res.json())
};