import {z} from 'zod'

export type GetApiUsageReportArgs = {'user-uuids'?: Array<string> | undefined, 'team-uuids'?: Array<string> | undefined, startDate: string, endDate: string};

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

export const usageReportTeam = z.object({uuid: z.string().optional(), name: z.string().optional()});

export const usageReportUser = z.object({uuid: z.string().optional(), firstName: z.string().optional(), lastName: z.string().optional(), email: z.string().optional(), team: usageReportTeam.optional()});

export const usageReportMetrics = z.object({coachingSessions: z.number().int(), callsViewed: z.number().int(), commentsLeft: z.number().int(), snippetsCreated: z.number().int(), gInsightsRan: z.number().int(), conversationInsightsRan: z.number().int(), superAgentQueries: z.number().int().optional(), superAgentWebQueries: z.number().int().optional(), superAgentSlackQueries: z.number().int().optional(), superAgentSessions: z.number().int().optional(), superAgentWebSessions: z.number().int().optional(), superAgentSlackSessions: z.number().int().optional()});

export const usageReport = z.object({user: usageReportUser, metrics: usageReportMetrics});

export const usageReportResponse = z.object({data: z.array(usageReport).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
};

/**
 * Get Usage Report
 * 
 * GET /usageReport
 */
export const getApiUsageReport = async (args: GetApiUsageReportArgs, options?: GetApiUsageReportOptions) => {
const {baseUrl = "https://api.attention.tech/v2", fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

if (args['user-uuids'] != null) query.append("user-uuids", args['user-uuids'].join(','))
if (args['team-uuids'] != null) query.append("team-uuids", args['team-uuids'].join(','))
if (args.startDate != null) query.append("startDate", String(args.startDate))
if (args.endDate != null) query.append("endDate", String(args.endDate))
if (APIKeyHeader !== undefined) headers.set("Authorization", APIKeyHeader)

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