import {z} from 'zod'

export type GetApiWorkflowsWorkflowIdArgs = {workflowId: string};

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

export const sourceEventsHashmap = z.record(z.string(), z.array(z.string()));

export const link = z.object({href: z.string()});

export const workflowConditionLinks = z.object({self: link.optional()});

export const sourceEntityHashmap = z.array(z.string());

export const sourceProcessingChannelHashmap = z.array(z.string());

export const getWorkflowCondition = z.discriminatedUnion("type", [z.object({id: z.string(), type: z.string(), events: sourceEventsHashmap, _links: workflowConditionLinks.optional()}), z.object({id: z.string(), type: z.string(), entities: sourceEntityHashmap, _links: workflowConditionLinks.optional()}), z.object({id: z.string(), type: z.string(), processing_channels: sourceProcessingChannelHashmap, _links: workflowConditionLinks.optional()})]);

export const workflowActionLinks = z.object({self: link.optional()});

export const getWorkflowAction = z.object({id: z.string(), type: z.string(), url: z.string(), headers: z.record(z.string(), z.string()).optional(), signature: z.object({method: z.string().optional(), key: z.string()}).optional(), _links: workflowActionLinks.optional()});

export const workflowLinks = z.object({self: link});

export const getWorkflowResponse = z.object({id: z.string().optional(), name: z.string().optional(), active: z.boolean().optional(), conditions: z.array(getWorkflowCondition).optional(), actions: z.array(getWorkflowAction).optional(), _links: workflowLinks.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 a workflow
 * 
 * GET /workflows/{workflowId}
 * 
 * Also accepts auth: ApiSecretKey
 */
export const getApiWorkflowsWorkflowId = async (args: GetApiWorkflowsWorkflowIdArgs, options: GetApiWorkflowsWorkflowIdOptions) => {
const {baseUrl, fetch: fetchFn = fetch, OAuth} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/workflows/${encodeURIComponent(String(args.workflowId))}${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(getWorkflowResponse, await res.json())
};