import {z} from 'zod'

export type CreateApiV1BalancesTrackTokensArgs = {'x-api-version': string, body: {customer_id: string, entity_id?: string | undefined, feature_id?: string | undefined, model_id: string, input_tokens: number, output_tokens: number, cache_read_tokens?: number | undefined, cache_write_tokens?: number | undefined, audio_input_tokens?: number | undefined, audio_output_tokens?: number | undefined, reasoning_tokens?: number | undefined, properties?: {[key: string]: unknown} | undefined, timestamp?: number | undefined, overage_behavior?: ('cap' | 'overflow') | undefined, async?: boolean | undefined}};

export type CreateApiV1BalancesTrackTokensOptions = {baseUrl?: string | undefined, secretKey?: string | undefined, fetch?: typeof fetch | undefined};

export const balance = z.object({feature_id: z.string(), feature: z.object({id: z.string(), name: z.string(), type: z.enum(["boolean", "metered", "credit_system", "ai_credit_system"]), consumable: z.boolean(), event_names: z.array(z.string()).optional(), credit_schema: z.array(z.object({metered_feature_id: z.string(), credit_cost: z.number()})).optional(), model_markups: z.record(z.string(), z.object({markup: z.number().gte(-100).optional(), input_cost: z.number().gte(0).optional(), output_cost: z.number().gte(0).optional()})).nullable().optional(), default_markup: z.number().gte(-100).optional(), provider_markups: z.record(z.string(), z.object({markup: z.number().gte(-100)})).nullable().optional(), display: z.object({singular: z.string().nullable().optional(), plural: z.string().nullable().optional()}).optional(), archived: z.boolean()}).optional(), granted: z.number(), remaining: z.number().gte(0), usage: z.number(), unlimited: z.boolean(), overage_allowed: z.boolean(), max_purchase: z.number().nullable(), next_reset_at: z.number().nullable(), breakdown: z.array(z.object({id: z.string().optional(), plan_id: z.string().nullable(), included_grant: z.number(), prepaid_grant: z.number(), remaining: z.number(), usage: z.number(), unlimited: z.boolean(), reset: z.object({interval: z.union([z.enum(["one_off", "minute", "hour", "day", "week", "month", "quarter", "semi_annual", "year"]), z.literal("multiple")]), interval_count: z.number().optional(), resets_at: z.number().nullable()}).nullable(), price: z.object({amount: z.number().optional(), tiers: z.array(z.object({to: z.union([z.number(), z.literal("inf")]), amount: z.number(), flat_amount: z.number().optional()})).optional(), tier_behavior: z.enum(["graduated", "volume"]).optional(), billing_units: z.number(), billing_method: z.enum(["prepaid", "usage_based"]), max_purchase: z.number().nullable()}).nullable(), expires_at: z.number().nullable()})).optional(), rollovers: z.array(z.object({balance: z.number(), expires_at: z.number()})).optional()});

export const createApiV1BalancesTrackTokensResponse = z.object({customer_id: z.string(), entity_id: z.string().optional(), event_name: z.string().optional(), value: z.number(), balance: balance.nullable(), balances: z.record(z.string(), balance.nullable()).optional(), deductions: z.array(z.object({balance_id: z.string(), feature_id: z.string(), plan_id: z.string().nullable(), reset: z.object({interval: z.union([z.enum(["one_off", "minute", "hour", "day", "week", "month", "quarter", "semi_annual", "year"]), z.literal("multiple")]), interval_count: z.number().optional(), resets_at: z.number().nullable()}).nullable(), value: z.number()})).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
};

/**
 * Records AI token usage for a customer and returns the updated AI credit balance.
 * 
 * POST /v1/balances.track_tokens
 */
export const createApiV1BalancesTrackTokens = async (args: CreateApiV1BalancesTrackTokensArgs, options?: CreateApiV1BalancesTrackTokensOptions) => {
const {baseUrl = "https://api.useautumn.com", fetch: fetchFn = fetch, secretKey} = options ?? {}

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

if (args['x-api-version'] != null) headers.set("x-api-version", String(args['x-api-version']))
if (secretKey !== undefined) headers.set('authorization', `Bearer ${secretKey}`)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/balances.track_tokens${query.size > 0 ? `?${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(createApiV1BalancesTrackTokensResponse, await res.json())
};