import {z} from 'zod'

export type AgentOutboundCallItem = {to_number: string, metadata?: ({[key: string]: unknown} | null) | undefined};

export type AgentOutboundCallRequest = {from_number_id: string, agent_id: string, outbound_calls: Array<AgentOutboundCallItem>, ringing_timeout_seconds?: number | undefined, max_call_duration_minutes?: number | undefined};

export type CreateApiAgentsCallsArgs = {'Cartesia-Version': '2026-03-01', body: AgentOutboundCallRequest};

export type CreateApiAgentsCallsOptions = {baseUrl?: string | undefined, APIKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const agentOutboundCallItemResponse = z.object({number: z.string(), agent_call_id: z.string(), error: z.record(z.string(), z.unknown()).nullable().optional()});

export const agentOutboundCallResponse = z.object({calls: z.array(agentOutboundCallItemResponse)});

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
};

/**
 * Create Outbound Call
 * 
 * POST /agents/calls
 */
export const createApiAgentsCalls = async (args: CreateApiAgentsCallsArgs, options?: CreateApiAgentsCallsOptions) => {
const {baseUrl = "https://api.cartesia.ai", fetch: fetchFn = fetch, APIKeyAuth} = options ?? {}

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

if (args['Cartesia-Version'] != null) headers.set("Cartesia-Version", String(args['Cartesia-Version']))
if (APIKeyAuth !== undefined) headers.set('authorization', `Bearer ${APIKeyAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/agents/calls${query.size > 0 ? `?${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(agentOutboundCallResponse, await res.json())
};