import {z} from 'zod'

export type SessionType = 'agent' | 'team' | 'workflow';

export type CreateSessionRequest = {session_id?: (string | null) | undefined, session_name?: (string | null) | undefined, session_state?: ({[key: string]: unknown} | null) | undefined, metadata?: ({[key: string]: unknown} | null) | undefined, user_id?: (string | null) | undefined, agent_id?: (string | null) | undefined, team_id?: (string | null) | undefined, workflow_id?: (string | null) | undefined};

export type CreateApiSessionsArgs = {type?: SessionType | undefined, db_id?: (string | null) | undefined, body: CreateSessionRequest};

export type CreateApiSessionsOptions = {baseUrl: string, HTTPBearer?: string | undefined, fetch?: typeof fetch | undefined};

export const agentSessionDetailSchema = z.object({user_id: z.string().nullable().optional(), agent_session_id: z.string(), session_id: z.string(), session_name: z.string(), session_summary: z.record(z.string(), z.unknown()).nullable().optional(), session_state: z.record(z.string(), z.unknown()).nullable().optional(), agent_id: z.string().nullable().optional(), total_tokens: z.number().int().nullable().optional(), agent_data: z.record(z.string(), z.unknown()).nullable().optional(), metrics: z.record(z.string(), z.unknown()).nullable().optional(), metadata: z.record(z.string(), z.unknown()).nullable().optional(), chat_history: z.array(z.record(z.string(), z.unknown())).nullable().optional(), created_at: z.string().nullable().optional(), updated_at: z.string().nullable().optional()});

export const teamSessionDetailSchema = z.object({session_id: z.string(), session_name: z.string(), user_id: z.string().nullable().optional(), team_id: z.string().nullable().optional(), session_summary: z.record(z.string(), z.unknown()).nullable().optional(), session_state: z.record(z.string(), z.unknown()).nullable().optional(), metrics: z.record(z.string(), z.unknown()).nullable().optional(), team_data: z.record(z.string(), z.unknown()).nullable().optional(), metadata: z.record(z.string(), z.unknown()).nullable().optional(), chat_history: z.array(z.record(z.string(), z.unknown())).nullable().optional(), created_at: z.string().nullable().optional(), updated_at: z.string().nullable().optional(), total_tokens: z.number().int().nullable().optional()});

export const workflowSessionDetailSchema = z.object({user_id: z.string().nullable().optional(), workflow_id: z.string().nullable().optional(), workflow_name: z.string().nullable().optional(), session_id: z.string(), session_name: z.string(), session_data: z.record(z.string(), z.unknown()).nullable().optional(), session_state: z.record(z.string(), z.unknown()).nullable().optional(), workflow_data: z.record(z.string(), z.unknown()).nullable().optional(), metadata: z.record(z.string(), z.unknown()).nullable().optional(), created_at: z.string().nullable().optional(), updated_at: z.string().nullable().optional()});

export const createApiSessionsResponse = z.union([agentSessionDetailSchema, teamSessionDetailSchema, workflowSessionDetailSchema]);

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
};

/**
 * Create New Session
 * 
 * POST /sessions
 */
export const createApiSessions = async (args: CreateApiSessionsArgs, options: CreateApiSessionsOptions) => {
const {baseUrl, fetch: fetchFn = fetch, HTTPBearer} = options ?? {}

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

if (args.type != null) query.append("type", String(args.type))
if (args.db_id != null) query.append("db_id", String(args.db_id))
if (HTTPBearer !== undefined) headers.set('authorization', `Bearer ${HTTPBearer}`)

const url = `${baseUrl.replace(/\/+$/, '')}/sessions${query.size > 0 ? `?${query}` : ''}`

const res = await fetchFn(url, {method: "POST", headers, body: JSON.stringify(args.body)})

if (!res.ok) throw new Error(`Request failed with status ${res.status}`, {cause: {status: res.status, body: await res.text()}})

return validateResponse(createApiSessionsResponse, await res.json())
};