import {z} from 'zod'

export type GetApiRouterV1RoutersArgs = {page_size?: number | undefined, page_token?: string | undefined};

export type GetApiRouterV1RoutersOptions = {baseUrl?: string | undefined, inworldBasic?: string | undefined, fetch?: typeof fetch | undefined};

export const sortMetric = z.enum(["SORT_METRIC_UNSPECIFIED", "SORT_METRIC_PRICE", "SORT_METRIC_LATENCY", "SORT_METRIC_THROUGHPUT", "SORT_METRIC_INTELLIGENCE", "SORT_METRIC_MATH", "SORT_METRIC_CODING"]);

export const sortDirection = z.enum(["SORT_DIRECTION_UNSPECIFIED", "SORT_DIRECTION_ASCENDING", "SORT_DIRECTION_DESCENDING"]);

export const sortCriteria = z.object({metric: sortMetric, direction: sortDirection.optional()});

export const providerConfig = z.object({order: z.array(z.string()).optional(), allow_fallbacks: z.boolean().optional()});

export const modelSelection = z.object({models: z.array(z.string()).optional(), sort: z.array(sortCriteria).optional(), ignore: z.array(z.string()).optional(), provider: providerConfig.optional()});

export const logitBias = z.object({token_id: z.string(), bias_value: z.number().int()});

export const reasoningConfig = z.object({effort: z.enum(["unspecified", "none", "minimal", "low", "medium", "high", "xhigh"]).optional(), max_tokens: z.number().int().optional(), exclude: z.boolean().optional()});

export const textGenerationConfig = z.object({max_tokens: z.number().int().optional(), top_p: z.number().optional(), temperature: z.number().optional(), repetition_penalty: z.number().optional(), frequency_penalty: z.number().optional(), presence_penalty: z.number().optional(), stop_sequences: z.array(z.string()).optional(), seed: z.number().int().optional(), logit_bias: z.array(logitBias).optional(), reasoning: reasoningConfig.optional()});

export const imageUrl = z.object({url: z.string(), detail: z.enum(["auto", "low", "high"]).optional()});

export const contentItem = z.union([z.object({text: z.string()}), z.object({image: imageUrl})]);

export const toolCall = z.object({id: z.string(), type: z.literal("function"), function: z.object({name: z.string(), arguments: z.string()})});

export const messageTemplate = z.object({role: z.string(), content: z.string().optional(), content_items: z.array(contentItem).optional(), tool_calls: z.array(toolCall).optional(), tool_call_id: z.string().optional()});

export const webSearchConfig = z.object({engine: z.enum(["exa", "google"]).optional(), max_results: z.number().int().gte(1).optional(), max_steps: z.number().int().gte(1).optional()});

export const variant = z.object({variant_id: z.string(), model_id: z.string().optional(), model_selection: modelSelection.optional(), text_generation_config: textGenerationConfig.optional(), message_templates: z.array(messageTemplate).optional(), web_search: webSearchConfig.optional()});

export const weightedVariant = z.object({variant: variant, weight: z.number()});

export const route = z.object({route_id: z.string(), variants: z.array(weightedVariant)});

export const condition = z.object({cel_expression: z.string()});

export const conditionalRoute = z.object({route: route, condition: condition});

export const routerDefaults = z.object({message_templates: z.array(messageTemplate).optional(), text_generation_config: textGenerationConfig.optional()});

export const router = z.object({name: z.string(), displayName: z.string().optional(), routes: z.array(conditionalRoute).optional(), defaultRoute: route.optional(), defaults: routerDefaults.optional()});

export const listRoutersResponse = z.object({routers: z.array(router).optional(), next_page_token: z.string().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 routers
 * 
 * GET /router/v1/routers
 */
export const getApiRouterV1Routers = async (args: GetApiRouterV1RoutersArgs, options?: GetApiRouterV1RoutersOptions) => {
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 (args.page_size != null) query.append("page_size", String(args.page_size))
if (args.page_token != null) query.append("page_token", String(args.page_token))
if (inworldBasic !== undefined) headers.set("Authorization", inworldBasic)

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