import {z} from 'zod'

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

export const connectionStatsResponse = z.object({total_avatars: z.number().int(), total_voices: z.number().int(), total_integrations: z.number().int()});

export const insightsResponse = z.object({rate_success: z.number().int(), flagged_messages: z.number().int(), stats: z.record(z.string(), z.number().int())});

export const safetyResponse = z.object({enabled: z.boolean(), credit_limit: z.number().int(), message_limit: z.number().int()});

export const kbCustomizationOverviewResponse = z.object({kb_id: z.string(), name: z.string(), icon: z.string(), connection_stats: connectionStatsResponse, insights: insightsResponse, safety: safetyResponse});

export const kbDashboardResponse = z.object({results: z.array(kbCustomizationOverviewResponse), message: z.string()});

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 Kb Dashboard
 * 
 * GET /knowledge-bases/dashboard
 * 
 * Also accepts auth: OAuth2PasswordBearer
 */
export const getApiKnowledgeBasesDashboard = async (options: GetApiKnowledgeBasesDashboardOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (APIKeyHeader !== undefined) headers.set("x-api-key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/knowledge-bases/dashboard${query.size > 0 ? `?${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(kbDashboardResponse, await res.json())
};