import {z} from 'zod'

export type GetApiEstimatesLinkableArgs = {patientId?: string | undefined};

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

export const estimateSummaryDto = z.object({id: z.string().optional(), estimateNumber: z.string().optional(), clientName: z.string().nullable().optional(), patientId: z.string().nullable().optional(), patientName: z.string().nullable().optional(), status: z.string().optional(), selectedTier: z.string().nullable().optional(), itemCount: z.union([z.number().int(), z.string()]).optional(), total: z.union([z.number(), z.string()]).optional(), appointmentId: z.string().nullable().optional(), invoiceId: z.string().nullable().optional(), invoiceStatus: z.string().nullable().optional(), invoiceNumber: z.string().nullable().optional(), invoiceItemCount: z.union([z.number().int(), z.string()]).nullable().optional(), invoiceTotal: z.union([z.number(), z.string()]).nullable().optional(), mergedIntoInvoiceId: z.string().nullable().optional(), mergedIntoInvoiceNumber: z.string().nullable().optional(), mergedIntoInvoiceStatus: z.string().nullable().optional(), createdAt: z.string().optional()});

export const estimateListResponseDto = z.object({items: z.array(estimateSummaryDto).optional(), total: z.union([z.number().int(), z.string()]).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 a patient's open, standalone estimates that can be linked to an appointment — i.e.
 * pre-existing quotes (created from the client/patient record) that are not yet converted
 * (`InvoiceId == null`), not declined, and not already tied to an appointment
 * (`AppointmentId == null`). Drives the "Link existing estimate" picker on the
 * Services tab.
 * 
 * GET /Estimates/linkable
 */
export const getApiEstimatesLinkable = async (args: GetApiEstimatesLinkableArgs, options?: GetApiEstimatesLinkableOptions) => {
const {baseUrl = "https://api.clinicos.vet/backend/business", fetch: fetchFn = fetch, Bearer} = options ?? {}

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

if (args.patientId != null) query.append("patientId", String(args.patientId))
if (Bearer !== undefined) headers.set('authorization', `Bearer ${Bearer}`)

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