import {z} from 'zod'

export type GetApiApiV1UsageExportArgs = {range?: ('7d' | '30d' | '90d' | '365d') | undefined, startDate?: string | undefined, endDate?: string | undefined, format?: ('csv' | 'json') | undefined, projectId?: string | undefined, detail?: ('daily' | 'full') | undefined, connectionId?: string | undefined, connectionType?: ('api' | 'oauth' | 'agent' | 'browser') | undefined};

export type GetApiApiV1UsageExportOptions = {baseUrl?: string | undefined, bearerAuth?: string | undefined, fetch?: typeof fetch | undefined};

export const dailyUsageExportRow = z.object({date: z.string(), project_name: z.string(), prompt_tokens: z.number(), completion_tokens: z.number(), total_tokens: z.number(), request_count: z.number(), cost_usd: z.number(), carbon_kg: z.number(), energy_kwh: z.number()});

export const usageExportFullRow = z.object({date: z.string(), model: z.string(), provider: z.string(), connection_id: z.string(), connection_type: z.enum(["api", "oauth", "agent", "browser"]), project_id: z.string(), project_name: z.string(), person_key: z.string().nullable(), person_name: z.string().nullable(), input_tokens_uncached: z.number().int().gte(0), input_tokens_cached: z.number().int().gte(0), input_tokens_cache_creation: z.number().int().gte(0), output_tokens: z.number().int().gte(0), total_tokens: z.number().int().gte(0), request_count: z.number().int().gte(0), provider_cost_usd: z.number().nullable(), cost_reported_events: z.number().int().gte(0), total_events: z.number().int().gte(0), carbon_kg: z.number(), energy_kwh: z.number(), water_liters: z.number()});

export const getApiApiV1UsageExportResponse = z.union([z.array(dailyUsageExportRow), z.array(usageExportFullRow)]);

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
};

/**
 * Export daily aggregates as CSV or JSON
 * 
 * GET /api/v1/usage/export
 * 
 * Also accepts auth: apiKey
 */
export const getApiApiV1UsageExport = async (args: GetApiApiV1UsageExportArgs, options?: GetApiApiV1UsageExportOptions) => {
const {baseUrl = "https://api.crbonfree.com", fetch: fetchFn = fetch, bearerAuth} = options ?? {}

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

if (args.range != null) query.append("range", String(args.range))
if (args.startDate != null) query.append("startDate", String(args.startDate))
if (args.endDate != null) query.append("endDate", String(args.endDate))
if (args.format != null) query.append("format", String(args.format))
if (args.projectId != null) query.append("projectId", String(args.projectId))
if (args.detail != null) query.append("detail", String(args.detail))
if (args.connectionId != null) query.append("connectionId", String(args.connectionId))
if (args.connectionType != null) query.append("connectionType", String(args.connectionType))
if (bearerAuth !== undefined) headers.set('authorization', `Bearer ${bearerAuth}`)

const url = `${baseUrl.replace(/\/+$/, '')}/api/v1/usage/export${query.size > 0 ? `?${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(getApiApiV1UsageExportResponse, await res.json())
};