import {z} from 'zod'

export type GetApiTasksArgs = {page?: string | undefined, per_page?: string | undefined, updated_since?: string | undefined, type?: string | undefined, fields?: string | undefined};

export type GetApiTasksOptions = {baseUrl?: string | undefined, OAuth2?: string | undefined, fetch?: typeof fetch | undefined};

export const toDosGetResponse = z.object({tasks: z.array(z.unknown()).optional(), pagination: z.object({total_records: z.number().int().optional(), total_pages: z.number().int().optional(), current_page: z.number().int().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
};

/**
 * Get tasks updated after a certain time
 * 
 * GET /tasks
 * 
 * Also accepts auth: ApiKeyAuth, CookieAuth
 */
export const getApiTasks = async (args: GetApiTasksArgs, options?: GetApiTasksOptions) => {
const {baseUrl = "https://company.aha.io/api/v1", fetch: fetchFn = fetch, OAuth2} = options ?? {}

const query = new URLSearchParams()
const headers = new Headers()
headers.set('accept', "application/json; charset=utf-8")

if (args.page != null) query.append("page", String(args.page))
if (args.per_page != null) query.append("per_page", String(args.per_page))
if (args.updated_since != null) query.append("updated_since", String(args.updated_since))
if (args.type != null) query.append("type", String(args.type))
if (args.fields != null) query.append("fields", String(args.fields))
if (OAuth2 !== undefined) headers.set('authorization', `Bearer ${OAuth2}`)

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