import {z} from 'zod'

export type GetApiBotsBotIdUsageArgs = {bot_id: string};

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

export const usageReport = z.object({bot_id: z.string(), meetingbaas_bot_id: z.string().nullable().optional(), stt_provider: z.string(), tts_provider: z.string(), llm_provider: z.string().nullable().optional(), llm_model: z.string().nullable().optional(), key_sources: z.record(z.string(), z.string()).optional(), started_at: z.number(), ended_at: z.number().nullable().optional(), duration_seconds: z.number(), stt_audio_seconds: z.number(), tts_characters: z.number().int(), tts_requests: z.number().int(), llm_turns: z.number().int(), llm_prompt_tokens: z.number().int(), llm_cached_prompt_tokens: z.number().int(), llm_completion_tokens: z.number().int(), llm_total_tokens: z.number().int()}).and(z.record(z.string(), z.unknown()));

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 Bot Usage
 * 
 * GET /bots/{bot_id}/usage
 */
export const getApiBotsBotIdUsage = async (args: GetApiBotsBotIdUsageArgs, options?: GetApiBotsBotIdUsageOptions) => {
const {baseUrl = "https://speaking.meetingbaas.com", fetch: fetchFn = fetch, ApiKeyAuth} = options ?? {}

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

if (ApiKeyAuth !== undefined) headers.set("x-meeting-baas-api-key", ApiKeyAuth)

const url = `${baseUrl.replace(/\/+$/, '')}/bots/${encodeURIComponent(String(args.bot_id))}/usage${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(usageReport, await res.json())
};