import {z} from 'zod'

export type GetApiApiV1ToolsOptions = {baseUrl: string, bearer?: string | undefined, fetch?: typeof fetch | undefined};

export const hostedToolDto = z.object({server_label: z.string(), type: z.literal("mcp"), name: z.string(), description: z.string(), auth: z.enum(["none", "platform", "caller", "connection"]), connect: z.enum(["oauth", "secret"]).nullable(), connect_path: z.string().nullable(), logo_url: z.string().nullable(), mode: z.enum(["hosted_proxy", "remote_mcp"]), default_require_approval: z.enum(["always", "never"]), required_scope: z.string(), available: z.boolean(), unavailable_reason: z.enum(["not_implemented", "disabled", "requires_plan", "requires_scope"]).nullable().optional()});

export const listToolsResponseDto = z.object({object: z.literal("list"), data: z.array(hostedToolDto)});

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 host-side tools
 * 
 * GET /api/v1/tools
 */
export const getApiApiV1Tools = async (options: GetApiApiV1ToolsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, bearer} = options ?? {}

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

if (bearer !== undefined) headers.set('authorization', `Bearer ${bearer}`)

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