import {z} from 'zod'

export type GetApiApiV1AppsAppIdUsageArgs = {app_id: string, start_date?: (string | null) | undefined, end_date?: (string | null) | undefined, limit?: number | undefined, offset?: number | undefined};

export type GetApiApiV1AppsAppIdUsageOptions = {baseUrl?: string | undefined, fetch?: typeof fetch | undefined};

export const meteredUsageResponse = z.object({instance_id: z.string(), project_id: z.union([z.number().int(), z.string()]), team_id: z.union([z.number().int(), z.string()]), timestamp: z.string(), event_type: z.string(), cost: z.number(), details: z.string().nullable(), usage_type: z.string(), billing_start: z.string(), billing_end: z.string(), duration_minutes: z.number(), billing_key: z.string(), billing_hour: z.string(), billing_day: z.string()});

export const appUsageResponse = z.object({usage: z.array(meteredUsageResponse), total: z.number().int(), total_cost: z.number()});

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
};

/**
 * Get app metered usage
 * 
 * GET /api/v1/apps/{app_id}/usage
 */
export const getApiApiV1AppsAppIdUsage = async (args: GetApiApiV1AppsAppIdUsageArgs, options?: GetApiApiV1AppsAppIdUsageOptions) => {
const {baseUrl = "https://cloud-api.phala.com", fetch: fetchFn = fetch} = options ?? {}

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

if (args.start_date != null) query.append("start_date", String(args.start_date))
if (args.end_date != null) query.append("end_date", String(args.end_date))
if (args.limit != null) query.append("limit", String(args.limit))
if (args.offset != null) query.append("offset", String(args.offset))

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/apps/${encodeURIComponent(String(args.app_id))}/usage${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(appUsageResponse, await res.json())
};