import {z} from 'zod'

export type GetApiLookupArgs = {urls: Array<string>, live?: boolean | undefined, recursive?: boolean | undefined, callback_url?: string | undefined, debug_email?: string | undefined, sets?: Array<string> | undefined, denoise?: boolean | undefined, min_age?: number | undefined, max_age?: number | undefined, squash?: boolean | undefined};

export type GetApiLookupOptions = {baseUrl?: string | undefined, ApiKeyAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const category = z.object({id: z.number().int().optional(), slug: z.string(), name: z.string()}).and(z.record(z.string(), z.unknown()));

export const technology = z.object({slug: z.string(), name: z.string(), cpe: z.string().optional(), versions: z.array(z.string()).optional(), categories: z.array(category).optional(), trafficRank: z.number().int().optional(), confirmedAt: z.number().int().optional()}).and(z.record(z.string(), z.unknown()));

export const lookupCompleted = z.object({url: z.string(), technologies: z.array(technology), technologySpend: z.enum(["Very low", "Low", "Medium", "High", "Very high"]).optional(), trafficLevel: z.enum(["Very low", "Low", "Medium", "High", "Very high"]).optional()}).and(z.record(z.string(), z.unknown()));

export const lookupPending = z.object({url: z.string(), technologies: z.array(technology).optional(), crawl: z.literal(true)}).and(z.record(z.string(), z.unknown()));

export const lookupError = z.object({url: z.string(), errors: z.array(z.string())}).and(z.record(z.string(), z.unknown()));

export const lookupResponseItem = z.union([lookupCompleted, lookupPending, lookupError]);

export const getApiLookupResponse = z.array(lookupResponseItem);

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
};

/**
 * Look up technologies and related website intelligence
 * 
 * GET /lookup
 */
export const getApiLookup = async (args: GetApiLookupArgs, options?: GetApiLookupOptions) => {
const {baseUrl = "https://api.wappalyzer.com/v2", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (args.urls != null) query.append("urls", args.urls.join(','))
if (args.live != null) query.append("live", String(args.live))
if (args.recursive != null) query.append("recursive", String(args.recursive))
if (args.callback_url != null) query.append("callback_url", String(args.callback_url))
if (args.debug_email != null) query.append("debug_email", String(args.debug_email))
if (args.sets != null) query.append("sets", args.sets.join(','))
if (args.denoise != null) query.append("denoise", String(args.denoise))
if (args.min_age != null) query.append("min_age", String(args.min_age))
if (args.max_age != null) query.append("max_age", String(args.max_age))
if (args.squash != null) query.append("squash", String(args.squash))
if (ApiKeyAuth !== undefined) headers.set("x-api-key", ApiKeyAuth)

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