import {z} from 'zod'

export type GetApiFieldsArgs = {search?: string | undefined, entity?: ('project' | 'user' | 'task' | 'file' | 'translation' | 'string' | 'term' | 'concept') | undefined, type?: ('checkbox' | 'radiobuttons' | 'date' | 'datetime' | 'number' | 'labels' | 'select' | 'multiselect' | 'text' | 'textarea' | 'url') | undefined, limit?: number | undefined, offset?: number | undefined};

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

export const field = z.object({id: z.number().int().optional(), name: z.string().optional(), slug: z.string().optional(), description: z.string().optional(), type: z.string().optional(), config: z.object({}).optional(), entities: z.array(z.enum(["project", "user", "task", "file", "translation", "string", "term", "concept"])).optional(), createdAt: z.string().optional(), updatedAt: z.string().optional()});

export const fieldResource = z.object({data: field});

export const advancedPagination = z.object({offset: z.number().int().optional(), limit: z.number().int().optional(), total: z.number().int().optional()});

export const fieldCollectionResource = z.object({data: z.array(fieldResource), pagination: advancedPagination.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 Fields
 * 
 * GET /fields
 */
export const getApiFields = async (args: GetApiFieldsArgs, options?: GetApiFieldsOptions) => {
const {baseUrl = "https://api.crowdin.com/api/v2", fetch: fetchFn = fetch} = options ?? {}

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

if (args.search != null) query.append("search", String(args.search))
if (args.entity != null) query.append("entity", String(args.entity))
if (args.type != null) query.append("type", String(args.type))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.offset != null) query.append("offset", String(args.offset))

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