import {z} from 'zod'

export type CompositeStaleChildPolicy = 'use_last_state' | 'treat_as_false' | 'treat_as_true';

export type CompositeCondition = {expression: string, stale_child_policy?: CompositeStaleChildPolicy | undefined, warning_counts_as_firing?: boolean | undefined};

export type CreateApiApiV2OrgIdAlertsCompositesValidateArgs = {org_id: string, body: {composite_condition: CompositeCondition, composite_id?: (string | null) | undefined, folder_id?: (string | null) | undefined}};

export type CreateApiApiV2OrgIdAlertsCompositesValidateOptions = {baseUrl: string, Authorization?: string | undefined, fetch?: typeof fetch | undefined};

export const compositeChildResponse = z.object({accessible: z.boolean(), alert_id: z.string(), alert_type: z.string().nullable().optional(), effective_cadence_seconds: z.number().int().nullable().optional(), enabled: z.boolean().nullable().optional(), folder_id: z.string().nullable().optional(), level: z.string().nullable().optional(), level_at: z.number().int().nullable().optional(), name: z.string().nullable().optional(), stale: z.boolean().nullable().optional(), stale_deadline: z.number().int().nullable().optional(), truth: z.boolean().nullable().optional()});

export const compositeValidationWarning = z.object({alert_id: z.string(), code: z.string()});

export const compositeValidationResponse = z.object({canonical_expression: z.string().nullable().optional(), children: z.array(compositeChildResponse), result: z.boolean().nullable().optional(), result_level: z.string().nullable().optional(), valid: z.boolean(), warnings: z.array(compositeValidationWarning)});

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
};

/**
 * Validate a composite alert condition
 * 
 * POST /api/v2/{org_id}/alerts/composites/validate
 */
export const createApiApiV2OrgIdAlertsCompositesValidate = async (args: CreateApiApiV2OrgIdAlertsCompositesValidateArgs, options: CreateApiApiV2OrgIdAlertsCompositesValidateOptions) => {
const {baseUrl, fetch: fetchFn = fetch, Authorization} = options ?? {}

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

if (Authorization !== undefined) headers.set("Authorization", Authorization)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v2/${encodeURIComponent(String(args.org_id))}/alerts/composites/validate${query.size > 0 ? `?${query}` : ''}`

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