import {z} from 'zod'

export type FlowWindow = '5m' | '1h' | '24h';

export type GetApiApiOrgIdFleetPipelinesArgs = {org_id: string, window?: FlowWindow | undefined};

export type GetApiApiOrgIdFleetPipelinesOptions = {baseUrl: string, Authorization?: string | undefined, fetch?: typeof fetch | undefined};

export const flowDestination = z.object({exporter: z.string().nullable().optional(), id: z.string(), target: z.string().nullable().optional(), type: z.string()});

export const pipelineFleet = z.object({collectors: z.number().int().gte(0), config: z.string().nullable().optional(), id: z.string(), name: z.string(), version: z.number().int().nullable().optional()});

export const pipelineExporter = z.object({destination: z.string(), dropped: z.number(), failed: z.number(), name: z.string(), queue: z.number().nullable().optional(), rate: z.number().nullable().optional()});

export const flowIssueKind = z.enum(["export_errors", "dropped", "backpressure", "receiver_refused"]);

export const flowSignal = z.enum(["logs", "metrics", "traces"]);

export const flowIssue = z.object({kind: flowIssueKind, signal: flowSignal, value: z.number()});

export const pipelineReceiver = z.object({name: z.string(), rate: z.number().nullable().optional(), refused: z.number()});

export const pipeline = z.object({dropped_ratio: z.number().nullable().optional(), exporters: z.array(pipelineExporter), failed_ratio: z.number().nullable().optional(), fleet: z.string(), id: z.string(), in_rate: z.number().nullable().optional(), issues: z.array(flowIssue), name: z.string(), out_rate: z.number().nullable().optional(), queue_ratio: z.number().nullable().optional(), receivers: z.array(pipelineReceiver), signal: flowSignal});

export const flowWindow = z.enum(["5m", "1h", "24h"]);

export const pipelinesResponse = z.object({destinations: z.array(flowDestination), fleets: z.array(pipelineFleet), generated_at: z.number().int(), metrics_restricted: z.boolean(), pipelines: z.array(pipeline), window: flowWindow});

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
};

/**
 * Throughput and issues per OTel pipeline of each readable fleet for the Pipelines page
 * 
 * GET /api/{org_id}/fleet/pipelines
 */
export const getApiApiOrgIdFleetPipelines = async (args: GetApiApiOrgIdFleetPipelinesArgs, options: GetApiApiOrgIdFleetPipelinesOptions) => {
const {baseUrl, fetch: fetchFn = fetch, Authorization} = options ?? {}

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

if (args.window != null) query.append("window", String(args.window))
if (Authorization !== undefined) headers.set("Authorization", Authorization)

const url = `${baseUrl.replace(/\/+$/, '')}/api/${encodeURIComponent(String(args.org_id))}/fleet/pipelines${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(pipelinesResponse, await res.json())
};