import {z} from 'zod'

export type GetApiV1ModelRouterConfigsArgs = {limit?: number | undefined, cursor?: (string | null) | undefined};

export type GetApiV1ModelRouterConfigsOptions = {baseUrl: string, APIKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const modelConfig = z.object({temperature: z.number().gte(0).lte(2).nullable().optional(), max_tokens: z.number().int().gte(1).nullable().optional(), top_p: z.number().gte(0).lte(1).nullable().optional(), stop_sequences: z.array(z.string()).nullable().optional(), reasoning_effort: z.enum(["none", "minimal", "low", "medium", "high", "xhigh", "max"]).nullable().optional(), request_timeout_ms: z.number().int().gte(1000).lte(20000).nullable().optional(), thinking_budget: z.number().int().gte(1).nullable().optional()});

export const modelChainEntry = z.object({model: z.string(), config: modelConfig.optional()});

export const routerConfigResponse = z.object({id: z.string(), organization_id: z.string(), name: z.string(), description: z.string().nullable(), is_default: z.boolean(), smart_routing_enabled: z.boolean(), model_chain: z.array(modelChainEntry), metadata: z.record(z.string(), z.unknown()).optional(), created_at: z.string(), updated_at: z.string()});

export const cursorPageRouterConfigResponse = z.object({items: z.array(routerConfigResponse), next_cursor: z.string().nullable().optional(), has_more: z.boolean()});

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 model router configs
 * 
 * GET /v1/model-router/configs
 */
export const getApiV1ModelRouterConfigs = async (args: GetApiV1ModelRouterConfigsArgs, options: GetApiV1ModelRouterConfigsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (args.limit != null) query.append("limit", String(args.limit))
if (args.cursor != null) query.append("cursor", String(args.cursor))
if (APIKeyHeader !== undefined) headers.set("x-api-key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/model-router/configs${query.size > 0 ? `?${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(cursorPageRouterConfigResponse, await res.json())
};