import {z} from 'zod'

export type GetApiMealplannerUsernameShoppingListArgs = {username: string, hash: string};

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

export const getApiMealplannerUsernameShoppingListResponse = z.object({aisles: z.array(z.object({aisle: z.string().min(1), items: z.array(z.object({id: z.number().int(), name: z.string().min(1), measures: z.object({original: z.object({amount: z.number(), unit: z.string().min(1)}), metric: z.object({amount: z.number(), unit: z.string().min(1)}), us: z.object({amount: z.number(), unit: z.string().min(1)})}).optional(), pantryItem: z.boolean(), aisle: z.string().min(1), cost: z.number(), ingredientId: z.number().int()})).optional()})), cost: z.number(), startDate: z.number(), endDate: 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 Shopping List
 * 
 * GET /mealplanner/{username}/shopping-list
 */
export const getApiMealplannerUsernameShoppingList = async (args: GetApiMealplannerUsernameShoppingListArgs, options?: GetApiMealplannerUsernameShoppingListOptions) => {
const {baseUrl = "https://api.spoonacular.com", fetch: fetchFn = fetch, apiKeyScheme} = options ?? {}

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

if (args.hash != null) query.append("hash", String(args.hash))
if (apiKeyScheme !== undefined) headers.set("x-api-key", apiKeyScheme)

const url = `${baseUrl.replace(/\/+$/, '')}/mealplanner/${encodeURIComponent(String(args.username))}/shopping-list${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(getApiMealplannerUsernameShoppingListResponse, await res.json())
};