import {z} from 'zod'

export type ViewOp = 'eq' | 'prefix' | 'regex' | 'param' | 'ref';

export type MatchOp = 'eq' | 'in' | 'prefix' | 'suffix' | 'contains' | 'regex';

export type Rule = {name?: (string | null) | undefined, onPage?: (string | null) | undefined, op: ViewOp, t: 'view', value?: (string | null) | undefined} | {onPage?: (string | null) | undefined, op?: (MatchOp | null) | undefined, t: 'action', targets?: Array<string> | undefined, value?: (string | null) | undefined} | {onPage?: (string | null) | undefined, op: MatchOp, t: 'error', value: string};

export type CreateNamedEvent = {name: string, rules: Array<Rule>};

export type CreateApiApiOrgIdRumAnalyticsNamedEventsArgs = {org_id: string, app: string, body: CreateNamedEvent};

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

export const viewOp = z.enum(["eq", "prefix", "regex", "param", "ref"]);

export const matchOp = z.enum(["eq", "in", "prefix", "suffix", "contains", "regex"]);

export const rule = z.union([z.object({name: z.string().nullable().optional(), onPage: z.string().nullable().optional(), op: viewOp, t: z.literal("view"), value: z.string().nullable().optional()}), z.object({onPage: z.string().nullable().optional(), op: matchOp.nullable().optional(), t: z.literal("action"), targets: z.array(z.string()).optional(), value: z.string().nullable().optional()}), z.object({onPage: z.string().nullable().optional(), op: matchOp, t: z.literal("error"), value: z.string()})]);

export const namedEvent = z.object({app: z.string(), createdAt: z.number().int(), createdBy: z.string(), id: z.string(), name: z.string(), rules: z.array(rule), updatedAt: z.number().int(), updatedBy: z.string(), version: z.number().int()});

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
};

/**
 * Create a named event
 * 
 * POST /api/{org_id}/rum/analytics/named_events
 */
export const createApiApiOrgIdRumAnalyticsNamedEvents = async (args: CreateApiApiOrgIdRumAnalyticsNamedEventsArgs, options: CreateApiApiOrgIdRumAnalyticsNamedEventsOptions) => {
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 (args.app != null) query.append("app", String(args.app))
if (Authorization !== undefined) headers.set("Authorization", Authorization)

const url = `${baseUrl.replace(/\/+$/, '')}/api/${encodeURIComponent(String(args.org_id))}/rum/analytics/named_events${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(namedEvent, await res.json())
};