import { definePluginEntry } from 'openclaw/plugin-sdk/plugin-entry'
import type { OpenClawPluginApi } from 'openclaw/plugin-sdk/core'
import fs from 'node:fs'
import path from 'node:path'
import { normalizeConfig, type SynthesisConfig } from './core/config.js'
import { ProcessManager } from './core/process-manager.js'
import { SessionMapping } from './core/session-mapping.js'
import { startBridgeServer } from './web/bridge-server.js'

// All long-lived state survives OpenClaw hot-reloads via globalThis.
const _G = globalThis as Record<string, unknown>
const PM_KEY = '_synthesisProcessManager'
const SERVER_KEY = '_synthesisBridgeServer'
const MAPPING_KEY = '_synthesisSessionMapping'
const LIFECYCLE_KEY = '_synthesisLifecycleRegistered'
const OPENCLAW_API_KEY = '_synthesisOpenclawApi'

function resolveAgentWorkspace(agentId: string): { workspace: string } | null {
  try {
    const configPath = path.join(process.env.HOME ?? '/root', '.openclaw', 'openclaw.json')
    const raw = JSON.parse(fs.readFileSync(configPath, 'utf8')) as {
      agents?: { list?: Array<{ id: string; workspace?: string }> }
    }
    const agent = raw.agents?.list?.find(a => a.id === agentId)
    if (!agent?.workspace) return null
    return { workspace: agent.workspace }
  } catch {
    return null
  }
}

export default definePluginEntry({
  id: 'synthesis-agent',
  name: 'SynthesisAgent',
  description: 'Routes OpenClaw agent turns through long-lived interactive Claude Code processes',

  register(api: OpenClawPluginApi): void {
    const config: SynthesisConfig = normalizeConfig((api as any).pluginConfig)
    const logger = (api as any).logger ?? console
    _G[OPENCLAW_API_KEY] = api

    let mapping = _G[MAPPING_KEY] as SessionMapping | undefined
    if (!mapping) {
      mapping = new SessionMapping(config.mappingDbPath)
      _G[MAPPING_KEY] = mapping
    }
    let pm = _G[PM_KEY] as ProcessManager | undefined
    if (!pm) {
      pm = new ProcessManager({ config, mapping, logger })
      _G[PM_KEY] = pm
    }

    if (!_G[LIFECYCLE_KEY]) {
      _G[LIFECYCLE_KEY] = true
      ;(api as any).on?.('gateway_start', () => {
        if (_G[SERVER_KEY]) return
        const server = startBridgeServer({
          config,
          mapping: mapping!,
          processManager: pm!,
          resolveAgent: resolveAgentWorkspace,
          logger,
        })
        _G[SERVER_KEY] = server
        logger.info?.(`[synthesis-agent] bridge HTTP=${config.bridgePort} WS=${config.channelWsPort}`)
      })
      ;(api as any).on?.('gateway_stop', async () => {
        const s = _G[SERVER_KEY] as Awaited<ReturnType<typeof startBridgeServer>> | undefined
        if (s) await s.close?.()
        delete _G[SERVER_KEY]
        await pm!.shutdown()
        delete _G[PM_KEY]
        logger.info?.('[synthesis-agent] bridge stopped')
      })
    }

    logger.info?.(`[synthesis-agent] plugin registered (bridge port=${config.bridgePort})`)
  },
})

// ── Standalone mode ───────────────────────────────────────────────────────────
// When this file is executed directly (e.g. `bun index.ts`), boot the bridge
// without the OpenClaw plugin runtime. Useful for local development & the
// laptop integration test.
//
// Detect direct execution via import.meta.main (Bun) or argv[1] match.
declare const Bun: { main: string } | undefined
const isDirectRun =
  (typeof Bun !== 'undefined' && Bun.main && import.meta.url === `file://${Bun.main}`) ||
  (process.argv[1] && (process.argv[1].endsWith('/index.ts') || process.argv[1].endsWith('/index.js')))

if (isDirectRun) {
  const config = normalizeConfig({})
  const mapping = new SessionMapping(config.mappingDbPath)
  const pm = new ProcessManager({ config, mapping })
  const server = startBridgeServer({
    config,
    mapping,
    processManager: pm,
    resolveAgent: resolveAgentWorkspace,
  })

  const shutdown = async () => {
    process.stderr.write('shutting down…\n')
    await server.close()
    await pm.shutdown()
    process.exit(0)
  }
  process.on('SIGINT', shutdown)
  process.on('SIGTERM', shutdown)
}