import {z} from 'zod'

export type GetApiPagesPageIdStatsArgs = {page_id: string, timerange_start?: string | undefined, timerange_end?: string | undefined};

export type GetApiPagesPageIdStatsOptions = {baseUrl?: string | undefined, BearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const pageSummary = z.object({id: z.number().int().optional(), public_id: z.string().optional(), name: z.string().optional(), current_path: z.string().optional(), type: z.string().optional()});

export const funnelSummary = z.object({id: z.number().int().optional(), public_id: z.string().optional(), name: z.string().optional()});

export const funnelStepStats = z.object({page_id: z.number().int().nullable().optional(), name: z.string().optional(), current_path: z.string().optional(), views_all: z.number().int().optional(), views_unique: z.number().int().optional(), optins: z.number().int().optional(), optin_rate: z.number().optional(), sales_count: z.number().int().optional(), sales_rate: z.number().optional(), sales_value: z.string().optional(), recurring_sales_count: z.number().int().optional(), recurring_sales_value: z.string().optional(), earnings_per_view: z.string().optional(), earnings_per_unique_view: z.string().optional()});

export const pageStatsAttributes = z.object({currency: z.string().optional(), timerange: z.object({from: z.string().optional(), to: z.string().optional()}).optional(), page: pageSummary.optional(), funnel: funnelSummary.nullable().optional(), step: funnelStepStats.nullable().optional()});

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
};

/**
 * Fetch Page Stats
 * 
 * GET /pages/{page_id}/stats
 * 
 * Also accepts auth: OAuth2
 */
export const getApiPagesPageIdStats = async (args: GetApiPagesPageIdStatsArgs, options?: GetApiPagesPageIdStatsOptions) => {
const {baseUrl = "https://myworkspace.myclickfunnels.com/api/v2", fetch: fetchFn = fetch, BearerAuth} = options ?? {}

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

if (args.timerange_start != null) query.append("timerange_start", String(args.timerange_start))
if (args.timerange_end != null) query.append("timerange_end", String(args.timerange_end))
if (BearerAuth !== undefined) headers.set('authorization', `Bearer ${BearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/pages/${encodeURIComponent(String(args.page_id))}/stats${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(pageStatsAttributes, await res.json())
};