import {z} from 'zod'

export type CreateApiApiV1McpArgs = {'X-Query-Validation'?: 'strict' | undefined, 'Mcp-Session-Id'?: string | undefined, 'MCP-Protocol-Version'?: ('2025-11-25' | '2025-06-18' | '2025-03-26' | '2024-11-05') | undefined, body: {jsonrpc: '2.0', id?: (string | number | null) | undefined, method: 'initialize' | 'notifications/initialized' | 'notifications/cancelled' | 'ping' | 'tools/list' | 'tools/call', params?: Record<string, never> | undefined}};

export type CreateApiApiV1McpOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const createApiApiV1McpResponse = z.object({jsonrpc: z.literal("2.0"), id: z.union([z.string(), z.number()]).nullable(), result: z.object({}).optional(), error: z.object({code: z.number().int(), message: 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
};

/**
 * Remote MCP endpoint (JSON-RPC)
 * 
 * POST /api/v1/mcp
 * 
 * Also accepts auth: oauth2
 */
export const createApiApiV1Mcp = async (args: CreateApiApiV1McpArgs, options?: CreateApiApiV1McpOptions) => {
const {baseUrl = "https://api.0xinsider.com", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args['X-Query-Validation'] != null) headers.set("X-Query-Validation", String(args['X-Query-Validation']))
if (args['Mcp-Session-Id'] != null) headers.set("Mcp-Session-Id", String(args['Mcp-Session-Id']))
if (args['MCP-Protocol-Version'] != null) headers.set("MCP-Protocol-Version", String(args['MCP-Protocol-Version']))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/mcp${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(createApiApiV1McpResponse, await res.json())
};