import {z} from 'zod'

export type GetApiHubWorkflowsArgs = {collection_topic?: string | undefined, version?: ('draft' | 'published') | undefined};

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

export const triggerNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("trigger"), trigger_type: z.enum(["manual", "schedule", "webhook", "gateway", "embed", "email", "object-store", "record", "task", "email-delivery", "mail"]).optional(), payload: z.record(z.string(), z.unknown())});

export const agentNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("agent"), payload: z.object({agent: z.object({name: z.string(), llm_provider: z.enum(["claude", "anthropic"]), model: z.string(), description: z.string().optional(), behaviour: z.string().optional(), output_schema: z.record(z.string(), z.string()).optional(), has_tools: z.boolean().optional(), tools: z.array(z.string()).optional(), knowledge: z.array(z.string()).optional(), timeout: z.number().optional()}).optional(), subject: z.string().optional(), node_subject: z.string().optional(), prompt: z.union([z.string(), z.object({})]).optional(), await: z.boolean().optional(), knowledge: z.array(z.string()).optional()})});

export const nodeOptions = z.object({flat_map: z.boolean().optional(), backoff_ms: z.number().int().optional(), timeout: z.number().int().optional(), attempts: z.number().int().gte(1).lte(10).optional(), ignore_response_codes: z.array(z.number().int()).optional()});

export const functionNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("function"), subject: z.string(), payload: z.unknown(), response_map: z.unknown(), options: nodeOptions.optional()});

export const httpPayload = z.object({base_url: z.string().optional(), url: z.string(), method: z.string(), data: z.object({}).optional(), params: z.object({}).optional(), query: z.object({}).optional(), headers: z.record(z.string(), z.string()).optional(), timeout: z.number().int().optional()});

export const integrationNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("integration"), integration_id: z.string().optional(), request_type_id: z.string().optional(), oauth: z.string().optional(), payload: httpPayload, options: nodeOptions.optional()});

export const httpNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("http"), payload: httpPayload, options: nodeOptions.optional()});

export const flowNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("flow"), subject: z.string(), payload: z.unknown(), await: z.boolean().optional(), response_map: z.unknown(), options: nodeOptions.optional()});

export const evalNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("eval"), payload: z.object({code: z.string(), params: z.record(z.string(), z.unknown())}), options: nodeOptions.optional()});

export const conditionNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("condition"), payload: z.object({rules: z.array(z.object({if: z.string().optional(), then: z.array(z.string()).optional(), else: z.array(z.string()).optional()})).optional()})});

export const rulesNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("rules"), payload: z.object({rules: z.object({}), facts: z.object({}).optional(), context: z.object({}).optional()})});

export const mapNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("map"), payload: z.union([z.object({}), z.array(z.unknown())]), options: z.object({flat_map: z.boolean().optional()}).optional()});

export const staticNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("static"), payload: z.record(z.string(), z.unknown())});

export const delayNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("delay"), payload: z.object({time_ms: z.number().int().gte(0)})});

export const scheduleNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("schedule"), payload: z.object({flow_subject: z.string(), trigger: z.unknown(), trigger_in: z.string().optional(), trigger_on: z.string().optional()})});

export const escalationPayload = z.object({message: z.string(), title: z.string().optional(), description: z.string().optional(), priority: z.string().optional(), assignees: z.string().optional(), fields: z.union([z.record(z.string(), z.unknown()), z.string()]).optional(), task_id: z.string().optional(), keep_status: z.boolean().optional()});

export const inputNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("input"), payload: escalationPayload});

export const humanInTheLoopNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("human-in-the-loop"), payload: escalationPayload});

export const quivaEndpointNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("quiva-endpoint"), subject: z.string(), payload: z.unknown()});

export const errorNodeData = z.object({id: z.string(), name: z.string().optional(), description: z.string().optional(), node_type: z.literal("error"), payload: z.object({status_code: z.number().int(), message: z.string().optional()})});

export const nodeData = z.discriminatedUnion("node_type", [triggerNodeData, agentNodeData, functionNodeData, integrationNodeData, httpNodeData, flowNodeData, evalNodeData, conditionNodeData, rulesNodeData, mapNodeData, staticNodeData, delayNodeData, scheduleNodeData, inputNodeData, humanInTheLoopNodeData, quivaEndpointNodeData, errorNodeData]);

export const nodeWorkflow = z.object({id: z.string(), data: nodeData, position: z.object({}).optional()});

export const edge = z.object({id: z.string(), source: z.string(), target: z.string()});

export const workflowConfig = z.object({nodes: z.array(nodeWorkflow).optional(), edges: z.array(edge).optional(), static: z.object({}).optional(), result: z.string().optional(), options: z.object({run_type: z.enum(["normal", "debounced", "ordered"]).optional(), order_on: z.string().optional(), debounce_on: z.string().optional(), debounce_time: z.number().int().optional(), debounce_max: z.number().int().optional()}).optional()});

export const modified = z.number().int();

export const listWorkflowsResponse = z.object({results: z.array(z.object({subject: z.string().optional(), name: z.string().optional(), description: z.string().optional(), config: workflowConfig.optional(), modified: modified.optional()})).optional(), results_total: 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
};

/**
 * List workflows
 * 
 * GET /hub/workflows
 * 
 * Also accepts auth: apiKeyAuth
 */
export const getApiHubWorkflows = async (args: GetApiHubWorkflowsArgs, options?: GetApiHubWorkflowsOptions) => {
const {baseUrl = "https://api.quiva.ai", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

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

const url = `${baseUrl.replace(/\/+$/, '')}/hub/workflows${query.size > 0 ? `?${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(listWorkflowsResponse, await res.json())
};