import {z} from 'zod'

export type WhyNowRequest = {domain?: string | undefined, org_id?: number | undefined, lookback_days?: number | undefined};

export type CreateApiV1AgentWhyNowArgs = {body: WhyNowRequest};

export type CreateApiV1AgentWhyNowOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const whyNowResponse = z.object({company: z.object({org_id: z.number().int().nullable().optional(), name: z.string().optional(), domain: z.string().optional(), name_agreement: z.number().int().optional()}).optional(), evidence: z.array(z.object({type: z.string().optional(), date: z.string().optional(), summary: z.string().optional(), source_url: z.string().optional(), source_kind: z.string().optional(), sec_items: z.array(z.string()).optional()})).optional(), last_event: z.object({type: z.string().optional(), date: z.string().optional(), summary: z.string().optional(), source_url: z.string().optional(), source_kind: z.string().optional(), sec_items: z.array(z.string()).optional(), within_lookback: z.boolean().optional()}).nullable().optional(), last_event_at: z.string().nullable().optional(), narrative: z.unknown(), coverage_note: z.string().nullable().optional(), resolved: z.boolean().optional(), _usage: z.object({units_charged: z.string().optional(), units_month_to_date: z.string().optional()}).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
};

/**
 * Dated evidence for one company
 * 
 * POST /v1/agent/why_now
 */
export const createApiV1AgentWhyNow = async (args: CreateApiV1AgentWhyNowArgs, options?: CreateApiV1AgentWhyNowOptions) => {
const {baseUrl = "https://api.fundz.net", 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 (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

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