import {z} from 'zod'

export type WorkflowNode = {name: string, node_type: string, configuration: {[key: string]: unknown}, dependencies?: Array<string> | undefined, is_output_node: boolean};

export type EdgeConditional = {position: number, operator: '=' | '!=' | '<' | '>' | '<=' | '>=' | 'in' | 'not_in' | 'is_null' | 'is_not_null', left_config: Record<string, never>, right_config: Record<string, never>};

export type Edge = {source_node_name: string, target_node_name: string, is_and: boolean, conditionals: Array<EdgeConditional>};

export type ExternalId = {source: string, external_id: string};

export type CreateWorkflow = {name?: (string | null) | undefined, workflow_id?: (number | null) | undefined, workflow_name?: (string | null) | undefined, folder_id?: (number | null) | undefined, commit_message?: (string | null) | undefined, nodes: Array<WorkflowNode>, required_input_variables?: {[key: string]: string} | undefined, edges?: (Array<Edge> | null) | undefined, release_labels?: (Array<string> | null) | undefined, external_ids?: Array<ExternalId> | undefined};

export type CreateApiRestWorkflowsArgs = {body: CreateWorkflow};

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

export const externalId = z.object({source: z.string().min(1).max(128), external_id: z.string().min(1).max(512)});

export const createWorkflowResponse = z.object({success: z.boolean(), workflow_id: z.number().int(), workflow_name: z.string(), workflow_version_id: z.number().int(), version_number: z.number().int(), base_version: z.number().int().nullable().optional(), release_labels: z.array(z.string()).nullable().optional(), nodes: z.array(z.object({id: z.string().optional(), name: z.string().optional(), node_type: z.string().optional(), is_output_node: z.boolean().optional()})).optional(), required_input_variables: z.record(z.string(), z.string()).optional(), external_ids: z.array(externalId)});

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
};

/**
 * Create Workflow
 * 
 * POST /rest/workflows
 */
export const createApiRestWorkflows = async (args: CreateApiRestWorkflowsArgs, options: CreateApiRestWorkflowsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (ApiKeyAuth !== undefined) headers.set("X-API-KEY", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/rest/workflows${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(createWorkflowResponse, await res.json())
};