import {z} from 'zod'

export type GetApiCurrentInstanceArgs = {scopeId: string, scopeType: string};

export type GetApiCurrentInstanceOptions = {baseUrl?: string | undefined, basicAuth?: {username: string, password: string} | undefined, fetch?: typeof fetch | undefined};

export const activityInfoDTO = z.object({id: z.string().optional(), scopeId: z.string().optional(), subScopeId: z.string().optional(), scopeDefinitionId: z.string().optional(), scopeDefinitionKey: z.string().optional(), scopeType: z.string().optional(), activityId: z.string().optional(), activityName: z.string().optional(), activityType: z.string().optional(), childScopeId: z.string().optional(), childScopeType: z.string().optional(), taskId: z.string().optional(), transactionOrder: z.number().int().optional(), userId: z.string().optional(), active: z.boolean().optional(), enabled: z.boolean().optional(), available: z.boolean().optional(), completed: z.boolean().optional(), breakpointId: z.string().optional(), breakpointType: z.string().optional(), hasErrors: z.boolean().optional()});

export const securityScopeDTO = z.object({userId: z.string().optional(), userDefinitionKey: z.string().optional(), groupKeys: z.array(z.string()).optional(), tenantId: z.string().optional()});

export const currentInstanceDTO = z.object({id: z.string().optional(), name: z.string().optional(), scopeId: z.string().optional(), scopeType: z.string().optional(), scopeName: z.string().optional(), scopeDefinitionId: z.string().optional(), scopeDefinitionKey: z.string().optional(), scopeDefinitionName: z.string().optional(), parentScopeId: z.string().optional(), parentScopeType: z.string().optional(), tenantId: z.string().optional(), hasScopeInstance: z.boolean().optional(), creationTime: z.string().optional(), creatorId: z.string().optional(), creatorUserName: z.string().optional(), endTime: z.string().optional(), steps: z.array(activityInfoDTO).optional(), securityScopes: z.record(z.string(), securityScopeDTO).optional(), actionCounter: z.number().int().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
};

/**
 * Get current instance
 * 
 * GET /current-instance
 */
export const getApiCurrentInstance = async (args: GetApiCurrentInstanceArgs, options?: GetApiCurrentInstanceOptions) => {
const {baseUrl = "http://localhost:8090/inspect-api", fetch: fetchFn = fetch, basicAuth} = options ?? {}

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

if (args.scopeId != null) query.append("scopeId", String(args.scopeId))
if (args.scopeType != null) query.append("scopeType", String(args.scopeType))
if (basicAuth !== undefined) headers.set('authorization', `Basic ${btoa(`${basicAuth.username}:${basicAuth.password}`)}`)

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