import {z} from 'zod'

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

export const publicPlan = z.object({tier: z.enum(["free", "silver", "gold", "platinum"]), name: z.string(), monthly_price_usd: z.number().int().gte(0), annual_price_usd: z.number().int().gte(0), monthly_credits: z.number().int().gte(0), api_access: z.enum(["full", "search_and_depth"]), max_api_keys: z.number().int().gte(1), rate_limit_per_minute: z.number().int().gte(1), daily_search_quota: z.number().int().gte(0), tech_stack_search: z.boolean(), checkout_url: z.string()});

export const publicPlans = z.object({currency: z.literal("USD"), plans: z.array(publicPlan), enterprise: z.object({contact_url: z.string(), note: z.string()}), how_to_get_a_key: z.object({signup_url: z.string(), keys_url: z.string(), note: z.string()}), checkout: z.record(z.string(), z.string()), docs: z.object({api_docs_url: z.string(), openapi_url: z.string()})});

export const getApiPlansResponse = z.object({data: publicPlans});

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 plans, included credits and how to get a key
 * 
 * GET /plans
 */
export const getApiPlans = async (options?: GetApiPlansOptions) => {
const {baseUrl = "https://indexed.vc/api/v1", fetch: fetchFn = fetch} = options ?? {}

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

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