#!/usr/bin/env bash
# GARC — Google Workspace Agent Runtime CLI
# Main entrypoint

set -euo pipefail

GARC_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"

# ── Python version gate ────────────────────────────────────────────────────
if ! python3 -c "import sys; assert sys.version_info >= (3,10), f'Python 3.10+ required, got {sys.version}'" 2>/dev/null; then
  _PY_VER=$(python3 --version 2>&1)
  echo "❌ GARC requires Python 3.10 or higher." >&2
  echo "   Detected: ${_PY_VER}" >&2
  echo "   Install Python 3.10+: https://www.python.org/downloads/" >&2
  exit 1
fi
GARC_LIB="${GARC_DIR}/lib"
GARC_CONFIG="${HOME}/.garc"
GARC_CONFIG_ENV="${GARC_CONFIG}/config.env"

# Load base config if present
if [[ -f "${GARC_CONFIG_ENV}" ]]; then
  # shellcheck source=/dev/null
  source "${GARC_CONFIG_ENV}"
fi

# Load profile-specific config (overrides base config)
GARC_PROFILE="${GARC_PROFILE:-}"
if [[ -n "${GARC_PROFILE}" ]]; then
  _PROFILE_ENV="${GARC_CONFIG}/profiles/${GARC_PROFILE}/config.env"
  if [[ -f "${_PROFILE_ENV}" ]]; then
    # shellcheck source=/dev/null
    source "${_PROFILE_ENV}"
  fi
  # Use profile-specific token if not already overridden
  _PROFILE_TOKEN="${GARC_CONFIG}/profiles/${GARC_PROFILE}/token.json"
  if [[ -f "${_PROFILE_TOKEN}" && -z "${GARC_TOKEN_FILE:-}" ]]; then
    export GARC_TOKEN_FILE="${_PROFILE_TOKEN}"
  fi
fi

# Defaults
GARC_CACHE_DIR="${GARC_CACHE_DIR:-${GARC_CONFIG}/cache}"
GARC_CACHE_TTL="${GARC_CACHE_TTL:-300}"
GARC_DEFAULT_AGENT="${GARC_DEFAULT_AGENT:-main}"

VERSION="0.1.0"

usage() {
  cat <<EOF
GARC v${VERSION} — Google Workspace Agent Runtime CLI

Usage: garc <command> [subcommand] [options]

━━━ Core ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  init                        Initialize GARC workspace (config + dirs)
  setup [all|check|sheets|drive]  Provision GWS resources automatically
  bootstrap [--agent <id>]    Load disclosure chain from Google Drive
  status                      Show config and connection health

━━━ Gmail ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  gmail send     --to <email> --subject <text> --body <text> [--cc] [--html]
  gmail reply    --thread-id <id> --to <email> --body <text>
  gmail search   <query> [--max N] [--body]
  gmail read     <message_id>
  gmail inbox    [--max N] [--unread]
  gmail draft    --to <email> --subject <text> --body <text>
  gmail labels
  gmail profile
  send "<msg>" --to <email>   Shorthand for gmail send

━━━ Google Calendar ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  calendar today              Events for today
  calendar week               Events for this week
  calendar list    [--days N] [--query <text>]
  calendar create  --summary <text> --start <dt> --end <dt> [--attendees ...]
  calendar update  <event_id> [--summary ...] [--start ...] [--end ...]
  calendar delete  <event_id>
  calendar get     <event_id>
  calendar freebusy --start <date> --end <date> --emails email1 [...]
  calendar quick-add "<natural language>"
  calendar calendars          List all accessible calendars

━━━ Google Drive ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  drive list         [--folder-id <id>] [--query <name>]
  drive search       <query> [--type doc|sheet|slide|folder|pdf]
  drive info         <file_id>
  drive download     --file-id <id> | --folder-id + --filename  [--output <path>]
  drive upload       <local_path> [--folder-id <id>] [--convert]
  drive create-folder <name> [--parent-id <id>]
  drive create-doc   <name> [--folder-id <id>] [--content <text>]
  drive share        <file_id> --email <email> [--role reader|writer]
  drive move         <file_id> --to <folder_id>
  drive delete       <file_id> [--permanent]

━━━ Google Sheets ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  sheets info        [--sheets-id <id>]
  sheets read        --range <A1:Z100> [--format table|json]
  sheets write       --range <A1> --values '[[...]]'
  sheets append      --sheet <name> --values '[...]'
  sheets search      --sheet <name> --query <text> [--format json]
  sheets clear       --range <range>

━━━ Memory ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  memory pull                 Sync Sheets memory → local cache
  memory push "<entry>"       Save entry to Sheets memory
  memory search <query>       Search memory entries

━━━ Tasks ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  task list        [--list <id>] [--completed] [--format json]
  task show        <task_id>
  task create      "<title>" [--due YYYY-MM-DD] [--notes <text>] [--list <id>]
  task update      <task_id> [--title] [--due] [--notes]
  task done        <task_id>           Mark task complete
  task delete      <task_id>
  task clear-completed                 Remove all completed tasks
  task tasklists                       List all task lists

━━━ People & Contacts ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  people search    <query>             Search personal contacts
  people directory <query>             Search GWS org directory
  people list      [--max N]
  people show      <contact_id>
  people create    --name <name> [--email] [--phone] [--company] [--title]
  people update    <contact_id> [--name] [--email] ...
  people delete    <contact_id>
  people lookup    <name>              Quick name → email lookup

━━━ Permission & Approval ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  auth suggest "<task>"       Infer minimum OAuth scopes
  auth check [--profile <p>]  Verify current token scopes
  auth login [--profile <p>]  Launch OAuth2 flow
  auth status                 Show token info
  approve gate <task_type>    Check execution gate
  approve list                List pending approvals
  approve create "<task>"     Create approval request
  approve act <id> --action approve|reject

━━━ Agents & Queue ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  agent list                  List registered agents
  agent register [--file]     Register from agents.yaml
  agent show <id>             Show agent details
  ingress enqueue  --text "<msg>" [--source gmail|manual] [--sender <email>]
  ingress list     [--status pending|done|failed|all]
  ingress next     [--agent <id>]
  ingress run-once [--agent <id>] [--dry-run]   → outputs Claude prompt
  ingress execute-stub --queue-id <id>           → show execution plan
  ingress context  --queue-id <id>               → full Claude-readable bundle
  ingress delegate --queue-id <id> --to <agent>
  ingress handoff  --queue-id <id>
  ingress approve/resume --queue-id <id>
  ingress done/fail --queue-id <id> [--note <text>]
  ingress verify   --queue-id <id>
  ingress stats

━━━ Google Forms (Response Pipeline) ━━━━━━━━━━━━━━━━━━━━━━━━━━
  forms list                  List accessible Google Forms
  forms responses <id>        List form responses
  forms watch <id> --agent    Poll form and auto-enqueue new responses

━━━ Daemon (Gmail Poller) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  daemon start     [--interval <sec>] [--agent <id>]
  daemon stop
  daemon status
  daemon restart
  daemon poll-once                    Single poll cycle (foreground)
  daemon logs      [--follow]
  daemon install                      Install macOS launchd service

━━━ Knowledge Graph ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  kg build                    Build KG from Drive Docs
  kg query "<concept>"        Search knowledge graph
  kg show <doc_id>            Show doc + links

━━━ Profiles (Multi-tenant) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  profile list                List all tenant profiles
  profile use <name>          Activate a profile (eval output)
  profile add <name>          Create a new profile
  profile show [<name>]       Show profile config
  profile remove <name>       Delete a profile
  profile current             Show active profile

━━━ System ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  heartbeat                   Log system state to Sheets
  audit list [--agent <id>] [--since YYYY-MM-DD]  View audit log
  doctor                      Check Python version and dependencies

Options:
  --help, -h      Show this help
  --version, -v   Show version
  --debug         Enable debug output
  --dry-run       Preview without executing
  --confirm       Auto-confirm preview-gated operations

Config: ~/.garc/config.env  |  Cache: ~/.garc/cache/
Docs:   docs/google-cloud-setup.md  |  Quickstart: docs/quickstart.md
EOF
}

# Parse global flags
DEBUG=false
DRY_RUN=false

while [[ $# -gt 0 ]]; do
  case "$1" in
    --debug) DEBUG=true; shift ;;
    --dry-run) DRY_RUN=true; shift ;;
    --help|-h) usage; exit 0 ;;
    --version|-v) echo "garc ${VERSION}"; exit 0 ;;
    *) break ;;
  esac
done

export DEBUG DRY_RUN GARC_DIR GARC_LIB GARC_CONFIG GARC_CACHE_DIR GARC_CACHE_TTL

# ── Non-blocking audit log ─────────────────────────────────────────────────
# Fires in background so it never blocks or fails the main command.
_garc_audit_log() {
  local cmd="$1"
  local args_str="$2"
  local result="${3:-ok}"
  local sheets_id="${GARC_SHEETS_ID:-}"
  local agent_id="${GARC_DEFAULT_AGENT:-}"

  [[ -z "${sheets_id}" ]] && return 0
  [[ "${cmd}" == "audit" ]] && return 0   # don't audit audit itself

  (
    python3 "${GARC_DIR}/scripts/garc-sheets-helper.py" audit-append \
      --sheets-id "${sheets_id}" \
      --agent-id "${agent_id}" \
      --cmd "${cmd}" \
      --args "${args_str}" \
      --result "${result}" \
      --user "${USER:-}" \
      --timestamp "$(date -u +"%Y-%m-%dT%H:%M:%SZ")" \
      2>/dev/null
  ) &
}

COMMAND="${1:-help}"
shift || true

case "${COMMAND}" in
  init)
    source "${GARC_LIB}/bootstrap.sh"
    garc_init "$@"
    ;;
  setup)
    python3 "${GARC_DIR}/scripts/garc-setup.py" "${1:-all}" "${@:2}"
    ;;
  bootstrap)
    source "${GARC_LIB}/bootstrap.sh"
    garc_bootstrap "$@"
    ;;
  status)
    source "${GARC_LIB}/bootstrap.sh"
    garc_status "$@"
    ;;
  memory)
    source "${GARC_LIB}/memory.sh"
    garc_memory "$@"
    ;;
  gmail)
    source "${GARC_LIB}/gmail.sh"
    garc_gmail "$@"
    ;;
  send)
    # Shorthand: garc send "<msg>" --to <email>
    source "${GARC_LIB}/send.sh"
    garc_send "$@"
    ;;
  calendar|cal)
    source "${GARC_LIB}/calendar.sh"
    garc_calendar "$@"
    ;;
  drive)
    source "${GARC_LIB}/drive.sh"
    garc_drive "$@"
    ;;
  sheets)
    source "${GARC_LIB}/sheets.sh"
    garc_sheets "$@"
    ;;
  task)
    source "${GARC_LIB}/task.sh"
    garc_task "$@"
    ;;
  people|contacts)
    source "${GARC_LIB}/people.sh"
    garc_people "$@"
    ;;
  approve)
    source "${GARC_LIB}/approve.sh"
    garc_approve "$@"
    ;;
  agent)
    source "${GARC_LIB}/agent.sh"
    garc_agent "$@"
    ;;
  auth)
    source "${GARC_LIB}/auth.sh"
    garc_auth "$@"
    ;;
  heartbeat)
    source "${GARC_LIB}/heartbeat.sh"
    garc_heartbeat "$@"
    ;;
  kg)
    source "${GARC_LIB}/kg.sh"
    garc_kg "$@"
    ;;
  ingress)
    source "${GARC_LIB}/ingress.sh"
    garc_ingress "$@"
    ;;
  daemon)
    source "${GARC_LIB}/daemon.sh"
    garc_daemon "$@"
    ;;
  audit)
    source "${GARC_LIB}/audit.sh"
    _garc_audit_log "audit" "$*"
    garc_audit "$@"
    ;;
  profile)
    source "${GARC_LIB}/profile.sh"
    garc_profile "$@"
    ;;
  forms)
    source "${GARC_LIB}/forms.sh"
    garc_forms "$@"
    ;;
  doctor)
    python3 - <<'PY'
import sys, importlib, subprocess

print("GARC Doctor — Environment Check")
print("─" * 40)

# Python version
pv = sys.version_info
status = "✅" if pv >= (3, 10) else "❌"
print(f"{status} Python {pv.major}.{pv.minor}.{pv.micro}  (required: >=3.10,<3.13)")

# Required packages
required = [
    ("googleapiclient",  "google-api-python-client"),
    ("google.auth",      "google-auth"),
    ("google_auth_oauthlib", "google-auth-oauthlib"),
    ("httplib2",         "google-auth-httplib2"),
    ("requests",         "requests"),
    ("yaml",             "pyyaml"),
    ("dateutil",         "python-dateutil"),
    ("rich",             "rich"),
]
print()
print("Dependencies:")
all_ok = True
for module, pkg in required:
    try:
        importlib.import_module(module)
        print(f"  ✅ {pkg}")
    except ImportError:
        print(f"  ❌ {pkg}  →  pip install {pkg}")
        all_ok = False

print()
if all_ok:
    print("✅ All checks passed.")
else:
    print("⚠️  Some packages missing. Run: pip install -r requirements.txt")
    sys.exit(1)
PY
    ;;
  help|--help|-h)
    usage
    ;;
  *)
    echo "garc: unknown command '${COMMAND}'" >&2
    echo "Run 'garc --help' for usage." >&2
    exit 1
    ;;
esac