#!/usr/bin/env bash
# kei — KeiSeiKit launcher with TUI splash, then exec claude.
#
# Distinct from `keisei` (Rust exobrain CLI: `keisei attach/mount/...`).
# `kei` is the lightweight splash + launch entry point most users want.
#
# Usage:
#   kei                     # splash → claude (interactive REPL)
#   kei --no-splash         # skip splash → exec claude
#   kei --status            # status only, don't launch claude
#   kei message ...         # inter-session mailbox (send/inbox/list) — see kei-message.sh
#   kei configure           # re-pick stack profile + opt-in hook packs
#   kei run-via <backend> <agent> "<task>"
#                           # invoke a KeiSeiKit agent via an external LLM CLI
#                           # backends: claude grok agy copilot kimi codex
#                           # `kei run-via list` shows install status
#   kei [args...]           # splash → claude args... (forwarded verbatim)
#
# The splash shows: substrate version, agent count, last sleep run,
# active sessions (kei-ping). Press any key to skip the dwell.
#
# Returns: same exit code as `claude`.

set -e

# --- subcommand dispatch (before splash) ---------------------------------
# `kei message ...` → mailbox CLI; `kei configure` → hook/stack re-picker;
# `kei run-via ...` → invoke agent through external LLM CLI; rest = launch.
case "${1:-}" in
  message|msg|m)
    shift
    exec "$HOME/.claude/scripts/kei-message.sh" "$@"
    ;;
  configure|config|reconfigure)
    shift
    exec "$HOME/.claude/scripts/kei-configure.sh" "$@"
    ;;
  run-via|via|run|agent-via)
    shift
    exec "$HOME/.claude/scripts/kei-agent-cli.sh" "$@"
    ;;
esac

# --- args ----------------------------------------------------------------
SPLASH=1
STATUS_ONLY=0
PASSTHROUGH=()
for arg in "$@"; do
  case "$arg" in
    --no-splash) SPLASH=0 ;;
    --status)    STATUS_ONLY=1; SPLASH=1 ;;
    *)           PASSTHROUGH+=("$arg") ;;
  esac
done

# --- locate claude on PATH -----------------------------------------------
CLAUDE_BIN="$(command -v claude 2>/dev/null || true)"
if [ -z "$CLAUDE_BIN" ] && [ "$STATUS_ONLY" = "0" ]; then
  echo "error: 'claude' not on PATH. Install Claude Code first:" >&2
  echo "  curl -fsSL https://claude.ai/install.sh | sh" >&2
  exit 127
fi

# --- read state ----------------------------------------------------------
AGENTS_DIR="${HOME}/.claude/agents"
SYNC_DIR="${HOME}/.claude/memory/sync-repo"

# Agent count from generated .md files
agent_count() {
  local n=0
  if [ -d "$AGENTS_DIR" ]; then
    n=$(find "$AGENTS_DIR" -maxdepth 1 -name "*.md" -not -name "_*" 2>/dev/null | wc -l | tr -d ' ')
  fi
  printf '%s' "$n"
}

# Profile from .installed marker file
profile_name() {
  # install.sh stamps the chosen profile here; .installed only holds primitive
  # names (so the old `grep ^profile .installed` always returned "?").
  local f="$HOME/.claude/.kei-profile"
  if [ -f "$f" ]; then head -1 "$f"; else echo "?"; fi
}

# Last Phase B sleep timestamp
last_sleep_run() {
  local f="${SYNC_DIR}/reports/last-run.txt"
  if [ -f "$f" ]; then
    local ts
    ts=$(cat "$f" 2>/dev/null | head -1)
    if [ -n "$ts" ]; then
      # epoch → human; macOS date(1) -r and Linux date(1) -d differ
      if date -r "$ts" '+%Y-%m-%d %H:%M' >/dev/null 2>&1; then
        date -r "$ts" '+%Y-%m-%d %H:%M'
      elif date -d "@$ts" '+%Y-%m-%d %H:%M' >/dev/null 2>&1; then
        date -d "@$ts" '+%Y-%m-%d %H:%M'
      else
        echo "$ts"
      fi
    else
      echo "never"
    fi
  else
    echo "never"
  fi
}

# Active session count via kei-ping (auto-selects redis or sqlite backend)
active_sessions() {
  if command -v kei-ping >/dev/null 2>&1; then
    kei-ping list 2>/dev/null | grep -cE '^\s*[0-9]+s\s' || echo "0"
  else
    echo "n/a"
  fi
}

# --- splash --------------------------------------------------------------
splash() {
  local p ac sl as
  p="$(profile_name)"
  ac="$(agent_count)"
  sl="$(last_sleep_run)"
  as="$(active_sessions)"

  # Only color if stdout is a tty. Brand palette: голубой (sky-blue) + жёлтый (gold).
  local C0= C1= C2= C3= CV=
  if [ -t 1 ]; then
    C0=$'\033[0m'
    C1=$'\033[1;38;5;39m'    # голубой (sky-blue) — logo
    C2=$'\033[1;38;5;220m'   # жёлтый (gold) — brand line
    C3=$'\033[2;38;5;39m'    # dim blue — separators
    CV=$'\033[1;38;5;220m'   # жёлтый — field values
  fi

  cat <<EOF

${C1}    ██╗  ██╗███████╗██╗███████╗███████╗██╗${C0}
${C1}    ██║ ██╔╝██╔════╝██║██╔════╝██╔════╝██║${C0}
${C1}    █████╔╝ █████╗  ██║███████╗█████╗  ██║${C0}
${C1}    ██╔═██╗ ██╔══╝  ██║╚════██║██╔══╝  ██║${C0}
${C1}    ██║  ██╗███████╗██║███████║███████╗██║${C0}
${C1}    ╚═╝  ╚═╝╚══════╝╚═╝╚══════╝╚══════╝╚═╝${C0}

${C2}    KeiSeiKit · substrate v0.38${C0}
${C3}    ─────────────────────────────────────${C0}
      profile        : ${CV}${p}${C0}
      agents         : ${CV}${ac}${C0}
      last sleep run : ${CV}${sl}${C0}
      active sessions: ${CV}${as}${C0}
${C3}    ─────────────────────────────────────${C0}

EOF
}

# --- main ----------------------------------------------------------------
if [ "$SPLASH" = "1" ]; then
  splash
fi

if [ "$STATUS_ONLY" = "1" ]; then
  exit 0
fi

# Brief dwell so user sees splash before claude takes over the screen.
# Skipped if stdin not a tty (CI / piped) or if --no-splash.
if [ "$SPLASH" = "1" ] && [ -t 0 ] && [ -t 1 ]; then
  # Wait up to 0.6s; any keypress aborts immediately.
  read -t 0.6 -n 1 -s _ 2>/dev/null || true
fi

exec "$CLAUDE_BIN" "${PASSTHROUGH[@]}"
