import {z} from 'zod'

export type MetadataEntityType = 'ACCOUNT' | 'BILL' | 'CONTRACT' | 'CUSTOMER' | 'INVOICE';

export type MetadataDefinitionStatus = 'ACTIVE' | 'ARCHIVED';

export type GetApiMetadataDefinitionsArgs = {entity_type?: MetadataEntityType | undefined, status?: MetadataDefinitionStatus | undefined};

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

export const metadataValueType = z.literal("TEXT");

export const metadataEntityType = z.enum(["ACCOUNT", "BILL", "CONTRACT", "CUSTOMER", "INVOICE"]);

export const metadataDefinitionStatus = z.enum(["ACTIVE", "ARCHIVED"]);

export const metadataDefinition = z.object({id: z.string(), key: z.string().max(63), name: z.string().max(50), description: z.string().max(500).optional(), value_type: metadataValueType, max_length: z.number().int(), entity_types: z.array(metadataEntityType), status: metadataDefinitionStatus});

export const getApiMetadataDefinitionsResponse = z.object({metadata_definitions: z.array(metadataDefinition)});

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
};

/**
 * Lists all metadata definitions
 * 
 * GET /metadata-definitions
 */
export const getApiMetadataDefinitions = async (args: GetApiMetadataDefinitionsArgs, options?: GetApiMetadataDefinitionsOptions) => {
const {baseUrl = "https://api.rillet.com", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

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

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