# Main Entry Point Features - Implementation Status

This document tracks the implementation status of all main entry point enhancements.

**Last Updated:** 2025-12-23

## Implementation Checklist

### ✅ Module Context Variables (COMPLETE)
- [x] `__MODULE__` - Current module name ("__main__" when run directly)
- [x] `__file__` / `__FILE__` - Absolute path to current file
- [x] `__DIR__` - Directory containing current file
- [x] `__PACKAGE__` - Package name (first directory component)
- [x] `__ARGS__` / `__ARGV__` - Command-line arguments as List

**Location:** `src/zexus/cli/main.py` lines 175-196
**Tests:** `tests/test_main_args_complete.zx`

### ✅ Basic Execution Control (COMPLETE)
- [x] `run()` - Keep program running until interrupted
- [x] `execute()` - Alias for run()
- [x] `is_main()` - Check if running as main module
- [x] `exit_program(code)` - Exit with status code

**Location:** `src/zexus/evaluator/functions.py` lines 1044-1210
**Tests:** `examples/main_entry_point.zx`, `examples/simple_run_example.zx`

### ✅ Lifecycle Hooks (COMPLETE)
- [x] `on_start(callback)` - Register startup hook
- [x] `on_exit(callback)` - Register shutdown hook
- [x] Multiple hooks support
- [x] Hooks called in registration order
- [x] Error handling in hooks

**Location:** `src/zexus/evaluator/functions.py` lines 1242-1278
**Tests:** `tests/test_lifecycle_hooks.zx`

### ✅ Signal Handling (COMPLETE)
- [x] `signal_handler(signal_name, callback)` - Register custom signal handlers
- [x] SIGINT support (Ctrl+C)
- [x] SIGTERM support
- [x] SIGHUP support
- [x] SIGUSR1/SIGUSR2 support (Unix only)
- [x] Multiple handlers per signal
- [x] Signal name passed to handler as argument
- [x] Handler chain behavior tested

**Location:** `src/zexus/evaluator/functions.py` lines 1276-1298
**Tests:** `tests/test_signal_handlers.zx`, `tests/test_signal_handlers_enhanced.zx`

**Example Usage:**
```zexus
signal_handler("SIGINT", lambda sig: print("Caught " + sig))
signal_handler("SIGINT", cleanup_handler)  # Multiple handlers supported
```

### ✅ Module Introspection (COMPLETE)
- [x] `get_module_name()` - Get current module name
- [x] `get_module_path()` - Get current file path
- [x] `module_info()` - Get map with all module metadata
- [x] `list_imports()` - List imported modules
- [x] `get_exported_names()` - List exported names

**Location:** `src/zexus/evaluator/functions.py` lines 1300-1403
**Tests:** `tests/test_module_introspection.zx`

### ✅ Type Introspection (COMPLETE)
- [x] `type()` - Get type name of any value

**Location:** `src/zexus/evaluator/functions.py` lines 534-558
**Tests:** `tests/final_integration_test.zx`

### ✅ Utility Functions (COMPLETE)
- [x] `sleep(seconds)` - Sleep for specified duration

**Location:** `src/zexus/evaluator/functions.py` lines 1377-1396
**Tests:** `tests/test_schedule_simple.zx`, `tests/test_schedule_multi.zx`

### ✅ Multi-Task Scheduling (COMPLETE)
- [x] `schedule(tasks)` - Execute multiple tasks at different intervals
- [x] Threading-based implementation
- [x] Daemon threads (exit with main program)
- [x] Support for multiple concurrent tasks
- [x] Task ID tracking

**Location:** `src/zexus/evaluator/functions.py` lines 1299-1376
**Tests:** `tests/test_schedule_simple.zx`, `tests/test_schedule_multi.zx`
**Registration:** Line 1514

**Example Usage:**
```zexus
schedule([
    {interval: 1, action: check_queue},
    {interval: 5, action: save_state}
])
```

---

## ❌ Missing/Incomplete Features

### 🔴 Enhanced run() Callbacks (INCOMPLETE)
**Status:** Basic run() works, but callback with arguments not fully tested

**What's Missing:**
- [ ] Test run() with callback arguments: `run(callback, interval, [arg1, arg2])`
- [ ] Verify callback receives arguments correctly
- [ ] Test error handling when callback fails

**Implementation:** Already coded in lines 1044-1154, needs testing

**Action Required:** Create test file `tests/test_run_with_args.zx`

### ✅ Background Process Daemon (COMPLETE)
- [x] `daemonize()` - Run program as background daemon
- [x] Double-fork for proper daemon creation
- [x] Session detachment (setsid)
- [x] File descriptor redirection
- [x] Optional working directory setting
- [x] Unix/Linux support (Windows returns error)

**Location:** `src/zexus/evaluator/functions.py` lines 1398-1471
**Tests:** `tests/test_daemonize.zx`
**Examples:** `examples/daemon_example.zx`
**Registration:** Line 1597

**Example Usage:**
```zexus
if is_main() {
    daemonize()              # Daemonize with defaults
    daemonize("/var/run")    # Daemonize with custom working dir
    run(server_loop)
}
```

---

## ❌ Missing/Incomplete Features

### 🔴 Enhanced run() Callbacks (INCOMPLETE)
**Status:** Basic run() works, but callback with arguments not fully tested

**What's Missing:**
- [ ] Test run() with callback arguments: `run(callback, interval, [arg1, arg2])`
- [ ] Verify callback receives arguments correctly
- [ ] Test error handling when callback fails

**Implementation:** Already coded in lines 1044-1154, needs testing

**Action Required:** Create test file `tests/test_run_with_args.zx`

### ✅ Hot Reload for Development (COMPLETE)
**Status:** Fully implemented with file watching

- [x] `watch_and_reload(files)` - Watch files for changes
- [x] File watching with configurable interval
- [x] Reload callback support
- [x] Threading-based implementation
- [x] Multiple file support

**Location:** `src/zexus/evaluator/functions.py` lines 1472-1583
**Tests:** `tests/test_hot_reload_simple.zx`, `tests/test_hot_reload_callback.zx`
**Registration:** Line 1686

**Example Usage:**
```zexus
# Watch single file
watch_and_reload([__file__])

# Watch with custom interval
watch_and_reload([__file__], 0.5)

# Watch with callback
watch_and_reload([__file__], 1.0, on_reload)
```

### 🔴 Enhanced Signal Handling (PARTIALLY DONE)
**Status:** Basic signal handling works, but missing some features

**What's Missing:**
- [ ] Signal handler receives signal name as argument
- [ ] Test that handlers can prevent default behavior
- [ ] Test multiple handlers for same signal

**Action Required:** Enhance `_signal_handler` and add tests

---

## Priority Implementation Order

### ✅ Completed - All Features Implemented! 🎉
1. ✅ **schedule()** - Multi-task scheduling
2. ✅ **daemonize()** - Background process support
3. ✅ **Enhanced run()** - Callback with arguments
4. ✅ **Hot Reload** - File watching and reload callbacks
5. ✅ **Enhanced Signal Handling** - Signal name passed to handlers, multiple handler support

### 🎯 Implementation Complete!

All main entry point features have been successfully implemented and tested.

---

## Testing Coverage

### ✅ Existing Tests
- `tests/test_main_args_complete.zx` - All module variables
- `tests/test_lifecycle_hooks.zx` - on_start/on_exit
- `tests/test_signal_handlers.zx` - Signal handling
- `tests/test_module_introspection.zx` - Introspection functions
- `tests/test_schedule_simple.zx` - Single task scheduling
- `tests/test_schedule_multi.zx` - Multiple task scheduling
- `tests/test_daemonize.zx` - Daemon mode availability
- `examples/daemon_example.zx` - Daemon usage example
- `tests/test_run_with_args.zx` - Enhanced run() with callback arguments
- `tests/test_hot_reload_simple.zx` - Hot reload basic functionality
- `tests/test_hot_reload_callback.zx` - Hot reload with callback
- `tests/test_signal_handlers_enhanced.zx` - Enhanced signal handling with arguments
- `tests/final_integration_test.zx` - Complete integration

### ❌ Missing Tests
- None - all main entry point features are fully tested! ✅

---

## Documentation Status

- ✅ `docs/MAIN_ENTRY_POINT.md` - Original feature documentation
- ✅ `docs/MAIN_ENTRY_POINT_ENHANCEMENTS.md` - Enhanced features documentation
- ✅ `MAIN_ENTRY_POINT_IMPLEMENTATION.md` - Implementation summary
- ✅ `docs/IF_STATEMENT_PARSER_FIX.md` - Parser fix documentation
- ✅ `SESSION_PARSER_FIX_SUMMARY.md` - Session summary
- ✅ **This file** - Implementation status tracking

---

## Next Steps

**Immediate Actions:**
1. Review this document to confirm what's needed
2. Implement schedule() function
3. Test run() with callback arguments
4. Decide if daemonize() and hot reload are needed

**For Each Missing Feature:**
1. Update this checklist when starting implementation
2. Mark complete when tests pass
3. Update documentation if behavior changes
4. Commit with descriptive message referencing this file
