import {z} from 'zod'

export type AlertMetric = 'turn_latency_p50' | 'turn_latency_p95' | 'api_errors' | 'function_errors' | 'call_crashes' | 'call_volume';

export type AlertState = 'ok' | 'alert' | 'no_data' | 'unknown';

export type GetApiV1AlertRulesArgs = {enabled?: boolean | undefined, metric?: AlertMetric | undefined, project_id?: string | undefined, state?: AlertState | undefined};

export type GetApiV1AlertRulesOptions = {baseUrl?: string | undefined, polyApiKey?: string | undefined, fetch?: typeof fetch | undefined};

export const alertMetric = z.enum(["turn_latency_p50", "turn_latency_p95", "api_errors", "function_errors", "call_crashes", "call_volume"]);

export const alertOperator = z.enum([">", "<", ">=", "<="]);

export const windowDuration = z.enum(["5m", "10m", "60m"]);

export const alertState = z.enum(["ok", "alert", "no_data", "unknown"]);

export const alertRuleResponse = z.object({id: z.string(), name: z.string(), project_id: z.string().nullable().optional(), metric: alertMetric, operator: alertOperator, threshold_value: z.number().int().gte(0), window_duration: windowDuration, enabled: z.boolean(), current_state: alertState.optional(), since: z.string().nullable().optional(), last_evaluated_at: z.string().nullable().optional(), current_value: z.number().int().nullable().optional(), created_at: z.string(), updated_at: z.string()});

export const alertRuleListResponse = z.object({data: z.array(alertRuleResponse)});

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 alert rules
 * 
 * GET /v1/alert-rules
 */
export const getApiV1AlertRules = async (args: GetApiV1AlertRulesArgs, options?: GetApiV1AlertRulesOptions) => {
const {baseUrl = "https://api.us.poly.ai", fetch: fetchFn = fetch, polyApiKey} = options ?? {}

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

if (args.enabled != null) query.append("enabled", String(args.enabled))
if (args.metric != null) query.append("metric", String(args.metric))
if (args.project_id != null) query.append("project_id", String(args.project_id))
if (args.state != null) query.append("state", String(args.state))
if (polyApiKey !== undefined) headers.set("X-API-KEY", polyApiKey)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/alert-rules${query.size > 0 ? `?${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(alertRuleListResponse, await res.json())
};