import {z} from 'zod'

export type PutWorkflowGraphInput = {nodes: Array<{public_id: string, type: 'trigger' | 'send_email' | 'wait' | 'condition' | 'webhook', config: {[key: string]: unknown}, canvas_x: number, canvas_y: number}>, edges: Array<{from_public_id: string, to_public_id: string, branch?: ('match' | 'no_match' | null) | undefined}>};

export type UpdateApiWorkflowsIdGraphArgs = {id: string, body: PutWorkflowGraphInput};

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

export const workflowGraph = z.object({nodes: z.array(z.object({public_id: z.string(), type: z.enum(["trigger", "send_email", "wait", "condition", "webhook"]), config: z.object({}), canvas_x: z.number().optional(), canvas_y: z.number().optional()})), edges: z.array(z.object({from_public_id: z.string(), to_public_id: z.string(), branch: z.enum(["match", "no_match"]).nullable().optional()}))});

export const updateApiWorkflowsIdGraphResponse = z.object({graph: workflowGraph});

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
};

/**
 * Replace the graph
 * 
 * PUT /workflows/{id}/graph
 * 
 * Also accepts auth: bearerOAuth
 */
export const updateApiWorkflowsIdGraph = async (args: UpdateApiWorkflowsIdGraphArgs, options?: UpdateApiWorkflowsIdGraphOptions) => {
const {baseUrl = "https://api.poststack.dev", fetch: fetchFn = fetch, bearerApiKey} = options ?? {}

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

if (bearerApiKey !== undefined) headers.set('authorization', `Bearer ${bearerApiKey}`)

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

const res = await fetchFn(url, {method: "PUT", 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(updateApiWorkflowsIdGraphResponse, await res.json())
};