#!/usr/bin/env zsh
emulate -L zsh
setopt err_exit no_unset pipe_fail

# wm-cursor: Manage Cursor SSH remote windows with grouped tmux sessions
# Each worktree gets its own Cursor window with an independently-focused
# grouped tmux session, sharing the same window list in the status bar.

# --- Resolve script path (must be at top level, not inside a function) ---

local script_path=${0:A}

# --- Resolve Cursor remote CLI (most recently modified) ---

local -a cursor_bins=(~/.cursor-server/cli/servers/*/server/bin/remote-cli/cursor(NOm))
if (( ${#cursor_bins} == 0 )); then
  print -u2 "Error: Cursor remote CLI not found in ~/.cursor-server/cli/servers/"
  exit 1
fi
local cursor_bin=${cursor_bins[1]}

# --- Refresh Cursor IPC socket (tmux may hold a stale one) ---
# Multiple stale sockets may exist; probe to find a live one

local sock
for sock in /tmp/vscode-ipc-*.sock(NOm); do
  if VSCODE_IPC_HOOK_CLI=$sock $cursor_bin --status &>/dev/null; then
    export VSCODE_IPC_HOOK_CLI=$sock
    break
  fi
done

# --- Helper functions ---

ensure_tmux() {
  if [[ -z ${TMUX-} ]]; then
    print -u2 "Error: Not inside a tmux session"
    exit 1
  fi
}

check_dev_db() {
  if ! docker ps --format '{{.Names}}' 2>/dev/null | grep -q '^windmill-db-dev$'; then
    print -u2 "Warning: windmill-db-dev container is not running"
  fi
}

setup_grouped_session() {
  local handle=$1 worktree_path=$2
  local session_name=cursor-${handle}

  # Detect the current main tmux session
  local main_session=$(tmux display-message -p '#S')

  # Create grouped session (shares windows with the main session)
  if ! tmux has-session -t $session_name 2>/dev/null; then
    tmux new-session -d -t $main_session -s $session_name
  fi

  # Focus on the worktree's window
  tmux select-window -t ${session_name}:wm-${handle} 2>/dev/null || true

  # Write .vscode/settings.json in the worktree if it doesn't already exist
  local settings_file=${worktree_path}/.vscode/settings.json
  if [[ ! -f $settings_file ]]; then
    mkdir -p ${settings_file:h}

    # Read ports from .env.local if available
    local env_file=${worktree_path}/.env.local
    local ports_config=""
    if [[ -f $env_file ]]; then
      local backend_port frontend_port
      source $env_file
      backend_port=${BACKEND_PORT-}
      frontend_port=${FRONTEND_PORT-}
      if [[ -n $backend_port && -n $frontend_port ]]; then
        ports_config=',
  "remote.autoForwardPorts": true,
  "remote.otherPortsAttributes": {
    "onAutoForward": "ignore"
  },
  "remote.portsAttributes": {
    "'$backend_port'": { "label": "Backend", "onAutoForward": "silent" },
    "'$frontend_port'": { "label": "Frontend", "onAutoForward": "openBrowserOnce" }
  }'
      fi
    fi

    cat > $settings_file <<SETTINGS
{
  "rust-analyzer.initializeStopped": true,
  "terminal.integrated.defaultProfile.linux": "wm-tmux",
  "terminal.integrated.profiles.linux": {
    "wm-tmux": {
      "path": "tmux",
      "args": ["attach-session", "-t", "${session_name}"]
    }
  }${ports_config}
}
SETTINGS
    print "Created ${settings_file}"
  fi
}

# --- Feature flag parsing ---
# Extracts --features <value> from args, exports CARGO_FEATURES, returns remaining args.
# Usage: parse_features_flag "$@"; set -- "${remaining_args[@]}"

parse_features_flag() {
  remaining_args=()
  while (( $# )); do
    case $1 in
      --features)
        if (( $# < 2 )); then
          print -u2 "Error: --features requires a value"
          exit 1
        fi
        export CARGO_FEATURES=$2
        shift 2
        ;;
      --features=*)
        export CARGO_FEATURES=${1#--features=}
        shift
        ;;
      *)
        remaining_args+=("$1")
        shift
        ;;
    esac
  done
}

# --- Subcommands ---

cmd_add() {
  ensure_tmux
  check_dev_db

  parse_features_flag "$@"
  set -- "${remaining_args[@]}"

  # Snapshot worktree list before
  local -a before=("${(@f)$(git worktree list --porcelain | grep '^worktree ')}")

  workmux add -b "$@"

  # Diff to find the new entry
  local -a after=("${(@f)$(git worktree list --porcelain | grep '^worktree ')}")
  local -a new=(${after:|before})

  if (( ${#new} == 0 )); then
    print -u2 "Error: Could not detect new worktree path"
    exit 1
  fi

  local new_path=${new[1]#worktree }
  local handle=${new_path:t}

  print "New worktree: ${handle} at ${new_path}"
  setup_grouped_session $handle $new_path
  $cursor_bin -n $new_path
  print "Opened Cursor for ${handle}"
}

cmd_open() {
  local name=${1:?Usage: wm-cursor open <name>}
  shift

  ensure_tmux
  check_dev_db

  parse_features_flag "$@"
  set -- "${remaining_args[@]}"

  # Write CARGO_FEATURES to .env.local if specified
  if [[ -n ${CARGO_FEATURES-} ]]; then
    local wt_env=$(workmux path $name)/.env.local
    if [[ -f $wt_env ]]; then
      # Remove existing CARGO_FEATURES line and append new one
      sed -i '/^CARGO_FEATURES=/d' $wt_env
      echo "CARGO_FEATURES=$CARGO_FEATURES" >> $wt_env
    fi
  fi

  local wt_path=$(workmux path $name)
  local prev_target=$(tmux display-message -p '#{session_name}:#{window_index}')

  workmux open $name "$@"
  tmux select-window -t $prev_target
  setup_grouped_session $name $wt_path
  $cursor_bin -n $wt_path
  print "Opened Cursor for ${name}"
}

cmd_close() {
  local name=${1:?Usage: wm-cursor close <name>}

  tmux kill-session -t cursor-${name} 2>/dev/null || true
  workmux close $name
}

cmd_setup() {
  local repo_root=${1:?Usage: wm-cursor setup <repo-root>}
  repo_root=${repo_root:A}
  local vscode_dir=${repo_root}/.vscode

  mkdir -p $vscode_dir

  # --- tasks.json ---
  local tasks_file=${vscode_dir}/tasks.json
  local write_tasks=true
  if [[ -f $tasks_file ]]; then
    print -n "tasks.json already exists. Overwrite? [y/N] "
    read -q || { print; write_tasks=false }
    print
  fi
  if $write_tasks; then
    cat > $tasks_file <<'TASKS'
{
  "version": "2.0.0",
  "tasks": [
    {
      "label": "Start dev DB",
      "type": "shell",
      "command": "./start-dev-db.sh",
      "options": { "shell": { "executable": "/bin/bash" } },
      "runOptions": { "runOn": "folderOpen" },
      "presentation": { "reveal": "silent", "close": true },
      "problemMatcher": []
    }
  ]
}
TASKS
    print "Wrote ${tasks_file}"
  fi

  # --- settings.json (merge wm-cursor keys, preserve existing) ---
  local settings_file=${vscode_dir}/settings.json
  local wmc_settings='
  {
    "rust-analyzer.initializeStopped": true,
    "terminal.integrated.defaultProfile.linux": "wm-tmux",
    "terminal.integrated.profiles.linux": {
      "wm-tmux": {
        "path": "tmux",
        "args": ["new-session", "-A", "-s", "main"]
      }
    },
    "remote.autoForwardPorts": true,
    "remote.otherPortsAttributes": {
      "onAutoForward": "ignore"
    },
    "remote.portsAttributes": {
      "8000": { "label": "Backend", "onAutoForward": "silent" },
      "3000": { "label": "Frontend", "onAutoForward": "openBrowserOnce" },
      "5432": { "label": "PostgreSQL", "onAutoForward": "silent" }
    }
  }'

  if [[ -f $settings_file ]]; then
    # Strip // comments so jq can parse, merge, then write back
    local existing
    existing=$(python3 -c '
import json, re, sys
text = sys.stdin.read()
# Remove // comments only outside of strings
text = re.sub(r'"'"'("(?:[^"\\]|\\.)*")|//[^\n]*'"'"', lambda m: m.group(1) or "", text)
json.dump(json.loads(text), sys.stdout, indent=2)
' < $settings_file)
    jq --argjson wmc "$wmc_settings" '. * $wmc' <<< "$existing" > ${settings_file}.tmp \
      && mv ${settings_file}.tmp $settings_file
    print "Merged wm-cursor settings into ${settings_file}"
  else
    jq . <<< "$wmc_settings" > $settings_file
    print "Created ${settings_file}"
  fi

  # --- zsh alias ---
  local rc=${ZDOTDIR:-$HOME}/.zshrc
  local alias_line="alias wmc=${(q)script_path}"

  if [[ -f $rc ]] && grep -qF 'alias wmc=' $rc; then
    sed -i "s|^alias wmc=.*|${alias_line}|" $rc
    print "Updated wmc alias in ${rc}"
  else
    print "\n# wm-cursor alias\n${alias_line}" >> $rc
    print "Added wmc alias to ${rc}"
  fi
}

# --- Main ---

case ${1-} in
  add)            shift; cmd_add "$@" ;;
  open)           shift; cmd_open "$@" ;;
  close)          shift; cmd_close "$@" ;;
  setup)          shift; cmd_setup "$@" ;;
  *)
    print -u2 "Usage: wm-cursor <add|open|close|setup> [args...]"
    print -u2 ""
    print -u2 "Subcommands:"
    print -u2 "  add [--features <f>] [workmux-add-args...]   Create worktree + open Cursor"
    print -u2 "  open <name> [--features <f>]                 Open Cursor for existing worktree"
    print -u2 "  close <name>                                 Clean up grouped tmux session"
    print -u2 "  setup <repo-root>                            Set up .vscode settings, tasks + wmc alias"
    print -u2 ""
    print -u2 "Options:"
    print -u2 "  --features <features>   Cargo features for the backend (e.g. \"enterprise,parquet\")"
    exit 1
    ;;
esac