import {z} from 'zod'

export type GetApiEstimatesIdItemsLineIdAvailabilityArgs = {id: string, lineId: string};

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

export const billableItemComponentAvailabilityDto = z.object({componentId: z.string().optional(), inventoryItemId: z.string().optional(), itemName: z.string().optional(), trackLots: z.boolean().optional(), required: z.union([z.number(), z.string()]).optional(), available: z.union([z.number(), z.string()]).optional(), isAvailable: z.boolean().optional(), shortBy: z.union([z.number(), z.string()]).optional()});

export const billableItemAvailabilityDto = z.object({billableItemId: z.string().optional(), quantity: z.union([z.number(), z.string()]).optional(), isAvailable: z.boolean().optional(), components: z.array(billableItemComponentAvailabilityDto).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
};

/**
 * Stock-only availability pre-check for a charge line on the estimate (design
 * §5 / §9.1): are the BillableItem's components on hand at the line's quantity?
 * Read-only — no validate-pass, no stock movement. Mirrors the invoice-side
 * check off the same `CheckAvailabilityAsync`, so the estimate UI can flag
 * a short charge before the user opens the perform modal.
 * 
 * GET /Estimates/{id}/items/{lineId}/availability
 */
export const getApiEstimatesIdItemsLineIdAvailability = async (args: GetApiEstimatesIdItemsLineIdAvailabilityArgs, options?: GetApiEstimatesIdItemsLineIdAvailabilityOptions) => {
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 (Bearer !== undefined) headers.set('authorization', `Bearer ${Bearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/Estimates/${encodeURIComponent(String(args.id))}/items/${encodeURIComponent(String(args.lineId))}/availability${query.size > 0 ? `?${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(billableItemAvailabilityDto, await res.json())
};