// ============================================================
// DevOS — Autonomous AI Execution System
// Copyright (c) 2026 Shiva Deore. All rights reserved.
// ============================================================

// core/doctor.ts — System health checks for DevOS subsystems.
//
// Sprint 23: ComputerUse Memory check via MemoryStrategy.
// Sprint 24: Hardware Detection + First-boot Setup checks.
//
// NOTE: This is the sandbox stub. The full implementation (with LLM provider,
// Docker, database, and tool-registry checks) lives at C:\Users\shiva\DevOS\core\doctor.ts
// and will be merged on the host machine.

import fs   from 'fs'
import path from 'path'
import { memoryStrategy }              from './memoryStrategy'
import { detectHardware }              from './hardwareDetector'
import { isSetupComplete }             from './setupWizard'
import { evolutionAnalyzer }           from './evolutionAnalyzer'
import { loadConfig }                  from '../providers/index'

// ── Types ────────────────────────────────────────────────────

export interface DoctorCheckResult {
  name:    string
  status:  'ok' | 'warn' | 'error'
  message: string
  detail?: string | Record<string, unknown>
}

export interface DoctorReport {
  timestamp: string
  checks:    DoctorCheckResult[]
  healthy:   boolean
}

// ── Corrupted skill name patterns ─────────────────────────────
// Skills with these name patterns are junk auto-generated names
const CORRUPTED_SKILL_NAMES = [
  'digital_ledger_app', 'open_batman_com', 'open_esquire_com',
  'clear_converastion', 'skills_skills', 'which_skill_you',
  'check_any_those', 'fetch_https_httpbin', 'read_users_shiva',
  'run_node_console', 'identify_skill_skills', 'open_instagram_com',
  'open_google_chrome', 'what', 'how_register_trademark',
  'what_hsn_code', 'what_just_happened', 'give_full_system',
  'access_uploaded_file', 'provide_data_yesterday',
]

// ── Individual checks ─────────────────────────────────────────

/**
 * Sprint 23 — ComputerUse Memory check.
 */
async function checkComputerUseMemory(): Promise<DoctorCheckResult> {
  try {
    const stats  = memoryStrategy.stats()
    const status = stats.total === 0 ? 'warn' : 'ok'
    return {
      name:   'ComputerUse Memory',
      status,
      message: stats.total === 0
        ? 'Memory store is empty — no computer-use sessions recorded yet'
        : `Memory store healthy — ${stats.total} goal(s), avg success rate ${(stats.avgSuccessRate * 100).toFixed(1)}%`,
      detail: {
        totalGoals:     stats.total,
        avgSuccessRate: stats.avgSuccessRate,
        topGoals:       stats.topGoals,
      },
    }
  } catch (err: any) {
    return {
      name:    'ComputerUse Memory',
      status:  'error',
      message: `Memory store unavailable: ${err?.message ?? 'unknown error'}`,
    }
  }
}

// ── Ollama check ──────────────────────────────────────────────

async function checkOllama(): Promise<DoctorCheckResult> {
  try {
    const ollamaBase = (process.env.OLLAMA_HOST ?? 'http://127.0.0.1:11434').replace(/\/$/, '')
    const r = await fetch(`${ollamaBase}/api/tags`, {
      signal: AbortSignal.timeout(3000),
    })
    if (!r.ok) return { name: 'Ollama', status: 'warn', message: `Ollama HTTP ${r.status}` }
    const data = await r.json() as any
    const all     = data.models || []
    const chatMod = all.filter((m: any) =>
      !m.name.includes('embed') && !m.name.includes('nomic') && !m.name.includes('mxbai')
    )
    if (chatMod.length === 0) {
      return { name: 'Ollama', status: 'warn', message: 'Running but no chat models installed', detail: 'Run: ollama pull gemma2:2b' }
    }
    return {
      name: 'Ollama', status: 'ok',
      message: `Running — ${chatMod.length} chat model(s): ${chatMod.map((m: any) => m.name).join(', ')}`,
    }
  } catch {
    return { name: 'Ollama', status: 'warn', message: 'NOT RUNNING — cloud APIs will be used instead', detail: 'Start Ollama for local inference' }
  }
}

// ── API keys check ────────────────────────────────────────────

function checkApiKeys(): DoctorCheckResult {
  try {
    const config = loadConfig()
    const apis   = config.providers?.apis || []
    const active = apis.filter(a => a.enabled && a.key && a.key.length > 10)
    if (active.length === 0) {
      return { name: 'API Keys', status: 'warn', message: 'NONE configured — add keys in dashboard Settings', detail: 'Go to http://localhost:3000 > Settings > API Keys' }
    }
    const summary = active.map(a => `${a.name}(${a.provider})`).join(', ')
    return { name: 'API Keys', status: 'ok', message: `${active.length} active: ${summary}` }
  } catch (e: any) {
    return { name: 'API Keys', status: 'error', message: `Config load failed: ${e.message}` }
  }
}

// ── Port check ────────────────────────────────────────────────

async function checkPorts(): Promise<DoctorCheckResult> {
  const ports = [4200, 3000, 3001, 11434]
  const labels: Record<number, string> = { 4200: 'Aiden API', 3000: 'Dashboard', 3001: 'MCP', 11434: 'Ollama' }
  const results: string[] = []
  await Promise.all(ports.map(async port => {
    try {
      const ctrl = new AbortController()
      const timer = setTimeout(() => ctrl.abort(), 1500)
      await fetch(`http://localhost:${port}`, { signal: ctrl.signal })
      clearTimeout(timer)
      results.push(`${labels[port]}:${port}(up)`)
    } catch (e: any) {
      if (e.name === 'AbortError') {
        results.push(`${labels[port]}:${port}(up)`) // connected, just no response
      } else {
        results.push(`${labels[port]}:${port}(down)`)
      }
    }
  }))
  const down = results.filter(r => r.includes('(down)'))
  return {
    name: 'Ports',
    status: down.length === 0 ? 'ok' : 'warn',
    message: results.join(' | '),
  }
}

// ── Skills check ──────────────────────────────────────────────

function checkSkills(): DoctorCheckResult {
  const skillDirs = [
    path.join(process.cwd(), 'workspace', 'skills', 'learned'),
    path.join(process.cwd(), 'workspace', 'skills', 'approved'),
    path.join(process.cwd(), 'skills'),
  ]
  let total     = 0
  let corrupted = 0
  const corruptedNames: string[] = []
  for (const dir of skillDirs) {
    if (!fs.existsSync(dir)) continue
    try {
      const entries = fs.readdirSync(dir, { withFileTypes: true })
      for (const e of entries) {
        if (!e.isDirectory()) continue
        total++
        if (CORRUPTED_SKILL_NAMES.includes(e.name) || e.name.length < 5 || !e.name.includes('_')) {
          corrupted++
          corruptedNames.push(e.name)
        }
      }
    } catch {}
  }
  if (corrupted > 0) {
    return {
      name: 'Skills', status: 'warn',
      message: `${total} skills, ${corrupted} corrupted — run: devos doctor --clean-skills`,
      detail:  `Corrupted: ${corruptedNames.slice(0, 8).join(', ')}${corruptedNames.length > 8 ? '...' : ''}`,
    }
  }
  return { name: 'Skills', status: 'ok', message: `${total} skills loaded, none corrupted` }
}

// ── Dashboard check ───────────────────────────────────────────

function checkDashboard(): DoctorCheckResult {
  const pkgPath = path.join(process.cwd(), 'dashboard-next', 'package.json')
  const distPath = path.join(process.cwd(), 'dashboard-next', '.next')
  if (!fs.existsSync(pkgPath)) {
    return { name: 'Dashboard', status: 'error', message: 'MISSING — dashboard-next/ not found' }
  }
  if (!fs.existsSync(distPath)) {
    return { name: 'Dashboard', status: 'warn', message: 'Found but not built — run: cd dashboard-next && npm run build' }
  }
  return { name: 'Dashboard', status: 'ok', message: 'dashboard-next/ found and built' }
}

// ── Scheduler check ───────────────────────────────────────────

function checkScheduler(): DoctorCheckResult {
  try {
    const schedPath = path.join(process.cwd(), 'workspace', 'scheduled-tasks.json')
    if (!fs.existsSync(schedPath)) {
      return { name: 'Scheduler', status: 'ok', message: '0 tasks scheduled' }
    }
    const tasks = JSON.parse(fs.readFileSync(schedPath, 'utf-8')) as any[]
    const active = tasks.filter(t => t.enabled !== false).length
    return { name: 'Scheduler', status: 'ok', message: `${tasks.length} tasks (${active} active)` }
  } catch (e: any) {
    return { name: 'Scheduler', status: 'warn', message: `Could not read tasks: ${e.message}` }
  }
}

// ── Clean corrupted skills ─────────────────────────────────────

export function cleanCorruptedSkills(): { deleted: string[]; kept: number } {
  const skillDirs = [
    path.join(process.cwd(), 'workspace', 'skills', 'learned'),
    path.join(process.cwd(), 'workspace', 'skills', 'approved'),
  ]
  const deleted: string[] = []
  let kept = 0
  for (const dir of skillDirs) {
    if (!fs.existsSync(dir)) continue
    try {
      const entries = fs.readdirSync(dir, { withFileTypes: true })
      for (const e of entries) {
        if (!e.isDirectory()) continue
        const fullPath = path.join(dir, e.name)
        const isCorrupted = (
          CORRUPTED_SKILL_NAMES.includes(e.name) ||
          e.name.length < 5 ||
          (!e.name.includes('_') && e.name !== 'stock_research' && e.name !== 'python_execution')
        )
        if (isCorrupted) {
          try {
            fs.rmSync(fullPath, { recursive: true, force: true })
            deleted.push(e.name)
          } catch {}
        } else {
          kept++
        }
      }
    } catch {}
  }
  return { deleted, kept }
}

// ── Doctor runner ─────────────────────────────────────────────

export async function runDoctor(): Promise<DoctorReport> {
  const checks: DoctorCheckResult[] = []

  // LLM providers
  checks.push(await checkOllama())
  checks.push(checkApiKeys())

  // Network ports
  checks.push(await checkPorts())

  // Sprint 23 — ComputerUse Memory
  checks.push(await checkComputerUseMemory())

  // Sprint 24 — Hardware Detection
  const hw = detectHardware()
  checks.push({
    name:    'Hardware Detection',
    status:  hw.gpu !== 'Unknown GPU' ? 'ok' : 'warn',
    message: hw.gpu !== 'Unknown GPU'
      ? `GPU detected: ${hw.gpu}`
      : 'GPU not detected - model recommendations may be suboptimal',
    detail:  `${hw.gpu} - ${hw.vramGB}GB VRAM - ${hw.ramGB}GB RAM - ${hw.platform}`,
  })

  // Sprint 24 — First-boot Setup
  const setupDone = isSetupComplete()
  checks.push({
    name:    'First-boot Setup',
    status:  setupDone ? 'ok' : 'warn',
    message: setupDone ? 'Setup complete' : 'Run: devos setup',
    detail:  setupDone ? 'Setup complete' : 'Run: devos setup',
  })

  // Sprint 27 — Self-Evolution Analyzer
  checks.push({
    name:    'Evolution Analyzer',
    status:  'ok',
    message: evolutionAnalyzer.getSummary(),
    detail:  evolutionAnalyzer.getSummary(),
  })

  // Skills, dashboard, scheduler
  checks.push(checkSkills())
  checks.push(checkDashboard())
  checks.push(checkScheduler())

  return {
    timestamp: new Date().toISOString(),
    checks,
    healthy:   checks.every(c => c.status !== 'error'),
  }
}
