import {z} from 'zod'

export type GetApiLlmV1alphaModelsOptions = {baseUrl?: string | undefined, inworldBasic?: string | undefined, fetch?: typeof fetch | undefined};

export const v1alphaModelPricing = z.object({prompt: z.number().optional(), completion: z.number().optional()});

export const v1alphaModelCapabilities = z.object({functionCalling: z.boolean().optional(), webSearch: z.boolean().optional(), reasoning: z.boolean().optional(), promptCaching: z.boolean().optional(), responseSchema: z.boolean().optional(), vision: z.boolean().optional()});

export const v1alphaModelSpec = z.object({inputModalities: z.array(z.enum(["text", "image", "audio", "video"])).optional(), outputModalities: z.array(z.enum(["text", "image", "audio"])).optional(), contextLength: z.number().int().optional(), maxCompletionTokens: z.number().int().optional(), supportedParameters: z.array(z.string()).optional(), capabilities: v1alphaModelCapabilities.optional()});

export const v1alphaModel = z.object({model: z.string(), provider: z.string(), modelCreator: z.string().optional(), pricing: v1alphaModelPricing.optional(), spec: v1alphaModelSpec.optional(), isSupported: z.boolean().optional()});

export const v1alphaListModelsResponse = z.object({models: z.array(v1alphaModel).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
};

/**
 * List models
 * 
 * GET /llm/v1alpha/models
 */
export const getApiLlmV1alphaModels = async (options?: GetApiLlmV1alphaModelsOptions) => {
const {baseUrl = "https://api.inworld.ai", fetch: fetchFn = fetch, inworldBasic} = options ?? {}

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

if (inworldBasic !== undefined) headers.set("Authorization", inworldBasic)

const url = `${baseUrl.replace(/\/+$/, '')}/llm/v1alpha/models${query.size > 0 ? `?${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(v1alphaListModelsResponse, await res.json())
};