import {z} from 'zod'

export type GetApiEsignSessionsArgs = {status?: ('pending' | 'in_progress' | 'completed' | 'declined' | 'cancelled') | undefined, email?: string | undefined, page?: number | undefined, limit?: number | undefined};

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

export const signingSessionSummary = z.object({id: z.string().optional(), documentName: z.string().optional(), status: z.enum(["pending", "in_progress", "completed", "expired", "declined", "cancelled"]).optional(), closeType: z.enum(["signature", "acceptance"]).optional(), signingOrder: z.enum(["sequential", "parallel"]).optional(), signers: z.array(z.object({index: z.number().int().optional(), email: z.string().optional(), name: z.string().optional(), status: z.string().optional()})).optional(), webhookParams: z.record(z.string(), z.unknown()).nullable().optional(), expiresAt: z.string().optional(), completedAt: z.string().nullable().optional(), createdAt: z.string().optional()});

export const pagination = z.object({page: z.number().int().optional(), limit: z.number().int().optional(), total: z.number().int().optional(), pages: z.number().int().optional()});

export const getApiEsignSessionsResponse = z.object({sessions: z.array(signingSessionSummary).optional(), pagination: pagination.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
};

/**
 * List signing sessions
 * 
 * GET /esign/sessions
 */
export const getApiEsignSessions = async (args: GetApiEsignSessionsArgs, options?: GetApiEsignSessionsOptions) => {
const {baseUrl = "https://api.docsautomator.co", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.status != null) query.append("status", String(args.status))
if (args.email != null) query.append("email", String(args.email))
if (args.page != null) query.append("page", String(args.page))
if (args.limit != null) query.append("limit", String(args.limit))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/esign/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(getApiEsignSessionsResponse, await res.json())
};