import {z} from 'zod'

export type GetApiV1ConversationsConversationIdTraceEvidenceArgs = {conversation_id: string, observation_id: Array<string>};

export type GetApiV1ConversationsConversationIdTraceEvidenceOptions = {baseUrl: string, APIKeyHeader?: string | undefined, fetch?: typeof fetch | undefined};

export const traceTruncation = z.object({path: z.string(), reason: z.string().nullable().optional(), scope: z.string().nullable().optional(), original_bytes: z.number().int().nullable().optional(), stored_bytes: z.number().int().nullable().optional(), original_chars: z.number().int().nullable().optional(), original_type: z.string().nullable().optional(), original_leaves: z.number().int().nullable().optional(), stored_leaves: z.number().int().nullable().optional(), omitted_entries: z.number().int().nullable().optional()});

export const traceStep = z.object({kind: z.string(), actor: z.enum(["Customer", "Agent", "System"]), title: z.string(), summary: z.string().nullable().optional(), status: z.enum(["Succeeded", "Failed", "Skipped", "In Progress"]), started_at: z.string(), ended_at: z.string().nullable().optional(), duration_ms: z.number().int().nullable().optional(), turn_id: z.string().nullable().optional(), details: z.record(z.string(), z.unknown()).optional(), observation_ids: z.array(z.string()).optional(), truncation: z.array(traceTruncation).optional()});

export const traceEvidenceResponse = z.object({steps: z.array(traceStep), missing_observation_ids: z.array(z.string()).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
};

/**
 * Resolve exact trace observations for dashboard evidence
 * 
 * GET /v1/conversations/{conversation_id}/trace/evidence
 */
export const getApiV1ConversationsConversationIdTraceEvidence = async (args: GetApiV1ConversationsConversationIdTraceEvidenceArgs, options: GetApiV1ConversationsConversationIdTraceEvidenceOptions) => {
const {baseUrl, fetch: fetchFn = fetch, APIKeyHeader} = options ?? {}

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

for (const item of args.observation_id ?? []) query.append("observation_id", String(item))
if (APIKeyHeader !== undefined) headers.set("x-api-key", APIKeyHeader)

const url = `${baseUrl.replace(/\/+$/, '')}/v1/conversations/${encodeURIComponent(String(args.conversation_id))}/trace/evidence${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(traceEvidenceResponse, await res.json())
};