import { homedir } from 'node:os'
import { resolve as resolvePath } from 'node:path'

export interface SynthesisConfig {
  bridgePort: number
  bridgeToken: string
  claudePluginRef: string
  permissionMode: string
  idleKillMs: number
  maxProcesses: number
  mappingDbPath: string
}

const DEFAULTS: SynthesisConfig = {
  bridgePort: 18801,
  bridgeToken: 'synthesis-local',
  claudePluginRef: 'plugin:synthesis-claude@local',
  permissionMode: 'acceptEdits',
  idleKillMs: 3_600_000,
  maxProcesses: 16,
  mappingDbPath: '~/.openclaw/synthesis/sessions.json',
}

function expand(p: string): string {
  if (p.startsWith('~')) return resolvePath(homedir(), p.slice(2))
  return resolvePath(p)
}

export function normalizeConfig(raw: unknown): SynthesisConfig {
  const r = (raw ?? {}) as Partial<SynthesisConfig>
  const merged: SynthesisConfig = {
    bridgePort: typeof r.bridgePort === 'number' ? r.bridgePort : DEFAULTS.bridgePort,
    bridgeToken: typeof r.bridgeToken === 'string' && r.bridgeToken ? r.bridgeToken : DEFAULTS.bridgeToken,
    claudePluginRef: typeof r.claudePluginRef === 'string' && r.claudePluginRef ? r.claudePluginRef : DEFAULTS.claudePluginRef,
    permissionMode: typeof r.permissionMode === 'string' && r.permissionMode ? r.permissionMode : DEFAULTS.permissionMode,
    idleKillMs: typeof r.idleKillMs === 'number' ? r.idleKillMs : DEFAULTS.idleKillMs,
    maxProcesses: typeof r.maxProcesses === 'number' ? r.maxProcesses : DEFAULTS.maxProcesses,
    mappingDbPath: typeof r.mappingDbPath === 'string' && r.mappingDbPath ? r.mappingDbPath : DEFAULTS.mappingDbPath,
  }
  merged.mappingDbPath = expand(merged.mappingDbPath)
  return merged
}