import {z} from 'zod'

export type GetApiApiV1SessionsArgs = {botId?: string | undefined, channelType?: string | undefined, status?: string | undefined, limit?: number | undefined, offset?: (number | null) | undefined};

export type GetApiApiV1SessionsOptions = {baseUrl: string, fetch?: typeof fetch | undefined};

export const getApiApiV1SessionsResponse = z.object({sessions: z.array(z.object({id: z.string(), botId: z.string(), sessionKey: z.string(), channelType: z.string().nullable(), channelId: z.string().nullable(), title: z.string(), status: z.string(), messageCount: z.number(), lastMessageAt: z.string().nullable(), metadata: z.record(z.string(), z.unknown()).nullable(), createdAt: z.string(), updatedAt: z.string()})), total: z.number(), limit: z.number(), offset: z.number()});

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
};

/**
 * GET /api/v1/sessions
 */
export const getApiApiV1Sessions = async (args: GetApiApiV1SessionsArgs, options: GetApiApiV1SessionsOptions) => {
const {baseUrl, fetch: fetchFn = fetch} = options ?? {}

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

if (args.botId != null) query.append("botId", String(args.botId))
if (args.channelType != null) query.append("channelType", String(args.channelType))
if (args.status != null) query.append("status", String(args.status))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.offset != null) query.append("offset", String(args.offset))

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/sessions${query.size > 0 ? `?${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(getApiApiV1SessionsResponse, await res.json())
};