---
source: framec/tests/csharp_snapshots.rs
expression: "compile_fixture(\"02_hsm\", \"csharp\")"
---
using System;
using System.Collections.Generic;
using System.Threading.Tasks;

class MiniHsmFrameEvent {
    public string _message;
    public List<object> _parameters;

    public MiniHsmFrameEvent(string message) {
        this._message = message;
        this._parameters = new List<object>();
    }

    public MiniHsmFrameEvent(string message, List<object> parameters) {
        this._message = message;
        this._parameters = parameters;
    }
}

class MiniHsmFrameContext {
    public MiniHsmFrameEvent _event;
    public object? _return;
    public Dictionary<string, object> _data;
    public bool _transitioned = false;

    public MiniHsmFrameContext(MiniHsmFrameEvent ev, object? defaultReturn = null) {
        this._event = ev;
        this._return = defaultReturn;
        this._data = new Dictionary<string, object>();
        this._transitioned = false;
    }
}

class MiniHsmCompartment {
    public string state;
    public List<object> state_args;
    public Dictionary<string, object> state_vars;
    public List<object> enter_args;
    public List<object> exit_args;
    public MiniHsmFrameEvent? forward_event;
    public MiniHsmCompartment? parent_compartment;

    public MiniHsmCompartment(string state) {
        this.state = state;
        this.state_args = new List<object>();
        this.state_vars = new Dictionary<string, object>();
        this.enter_args = new List<object>();
        this.exit_args = new List<object>();
        this.forward_event = null;
        this.parent_compartment = null;
    }

    public MiniHsmCompartment Copy() {
        MiniHsmCompartment c = new MiniHsmCompartment(this.state);
        c.state_args = new List<object>(this.state_args);
        c.state_vars = new Dictionary<string, object>(this.state_vars);
        c.enter_args = new List<object>(this.enter_args);
        c.exit_args = new List<object>(this.exit_args);
        c.forward_event = this.forward_event;
        c.parent_compartment = this.parent_compartment;
        return c;
    }
}

public class MiniHsm {
    private List<MiniHsmCompartment> _state_stack;
    private MiniHsmCompartment __compartment;
    private MiniHsmCompartment? __next_compartment;
    private List<MiniHsmFrameContext> _context_stack;
    public int awakes = 0;
    public int sleeps = 0;
    public int last = 0;

    public MiniHsm() {
        _state_stack = new List<MiniHsmCompartment>();
        _context_stack = new List<MiniHsmFrameContext>();
        this.__compartment = __prepareEnter("Live", new List<object>(), new List<object>());
        this.__next_compartment = null;
    }

    public void __frame_init() {
        MiniHsmFrameEvent __e = new MiniHsmFrameEvent("$>", __compartment.enter_args);
        MiniHsmFrameContext __ctx = new MiniHsmFrameContext(__e, null);
        _context_stack.Add(__ctx);
        __kernel(__e);
        _context_stack.RemoveAt(_context_stack.Count - 1);
    }

    public static MiniHsm __create() {
        MiniHsm c = new MiniHsm();
        c.__frame_init();
        return c;
    }

    private Dictionary<string, List<string>> hsm_chain() {
        return new Dictionary<string, List<string>> {
            { "Live", new List<string> { "Live" } },
            { "Awake", new List<string> { "Live", "Awake" } },
            { "Asleep", new List<string> { "Live", "Asleep" } },
        };
    }
    private MiniHsmCompartment __prepareEnter(string leaf, List<object> state_args, List<object> enter_args) {
        MiniHsmCompartment? comp = null;
        foreach (string name in hsm_chain()[leaf]) {
            MiniHsmCompartment new_comp = new MiniHsmCompartment(name);
            new_comp.state_args = new List<object>(state_args);
            new_comp.enter_args = new List<object>(enter_args);
            new_comp.parent_compartment = comp;
            comp = new_comp;
        }
        return comp!;
    }

    private void __prepareExit(List<object> exit_args) {
        MiniHsmCompartment? comp = __compartment;
        while (comp != null) {
            comp.exit_args = new List<object>(exit_args);
            comp = comp.parent_compartment;
        }
    }

    private void __kernel(MiniHsmFrameEvent __e) {
        // Route event to current state.
        __router(__e);
        // Drain any transitions queued by the handler.
        while (__next_compartment != null) {
            MiniHsmCompartment next_compartment = __next_compartment!;
            __next_compartment = null;
            // Exit the current (leaf) state.
            MiniHsmFrameEvent exit_event = new MiniHsmFrameEvent("<$", __compartment.exit_args);
            __router(exit_event);
            // Switch to the new compartment.
            __compartment = next_compartment;
            // Three-branch forward-event handling.
            MiniHsmFrameEvent? forward_event = next_compartment.forward_event;
            next_compartment.forward_event = null;
            if (forward_event == null) {
                // No forwarded event — synthesize a fresh $>.
                MiniHsmFrameEvent enter_event = new MiniHsmFrameEvent("$>", __compartment.enter_args);
                __router(enter_event);
            } else if (forward_event._message == "$>") {
                // Forwarded event IS $> — dispatch directly so the
                // destination's $> handler receives the caller's payload.
                __router(forward_event);
            } else {
                // Forwarded event is not $> — initialize the destination
                // with a fresh $>, then dispatch the forward.
                MiniHsmFrameEvent enter_event = new MiniHsmFrameEvent("$>", __compartment.enter_args);
                __router(enter_event);
                __router(forward_event);
            }
            foreach (var ctx in _context_stack) {
                ctx._transitioned = true;
            }
        }
    }

    private void __router(MiniHsmFrameEvent __e) {
        if (__compartment.state == "Live") {
            _state_Live(__e, __compartment);
        } else if (__compartment.state == "Awake") {
            _state_Awake(__e, __compartment);
        } else if (__compartment.state == "Asleep") {
            _state_Asleep(__e, __compartment);
        }
    }

    private void __transition(MiniHsmCompartment next) {
        __next_compartment = next;
    }

    public void wake() {
        MiniHsmFrameEvent __e = new MiniHsmFrameEvent("wake", new List<object>());
        MiniHsmFrameContext __ctx = new MiniHsmFrameContext(__e, null);
        _context_stack.Add(__ctx);
        try {
            __kernel(_context_stack[_context_stack.Count - 1]._event);
            _context_stack.RemoveAt(_context_stack.Count - 1);
        } catch {
            _context_stack.RemoveAt(_context_stack.Count - 1);
            throw;
        }
    }

    public void sleep() {
        MiniHsmFrameEvent __e = new MiniHsmFrameEvent("sleep", new List<object>());
        MiniHsmFrameContext __ctx = new MiniHsmFrameContext(__e, null);
        _context_stack.Add(__ctx);
        try {
            __kernel(_context_stack[_context_stack.Count - 1]._event);
            _context_stack.RemoveAt(_context_stack.Count - 1);
        } catch {
            _context_stack.RemoveAt(_context_stack.Count - 1);
            throw;
        }
    }

    public void signal() {
        MiniHsmFrameEvent __e = new MiniHsmFrameEvent("signal", new List<object>());
        MiniHsmFrameContext __ctx = new MiniHsmFrameContext(__e, null);
        _context_stack.Add(__ctx);
        try {
            __kernel(_context_stack[_context_stack.Count - 1]._event);
            _context_stack.RemoveAt(_context_stack.Count - 1);
        } catch {
            _context_stack.RemoveAt(_context_stack.Count - 1);
            throw;
        }
    }

    private void _state_Live(MiniHsmFrameEvent __e, MiniHsmCompartment compartment) {
        if (__e._message == "signal") {
            this._s_Live_hdl_user_signal(__e, compartment);
            return;
        }
        if (__e._message == "sleep") {
            this._s_Live_hdl_user_sleep(__e, compartment);
            return;
        }
        if (__e._message == "wake") {
            this._s_Live_hdl_user_wake(__e, compartment);
            return;
        }
    }

    private void _state_Awake(MiniHsmFrameEvent __e, MiniHsmCompartment compartment) {
        if (__e._message == "$>") {
            this._s_Awake_hdl_frame_enter(__e, compartment);
            return;
        }
        if (__e._message == "signal") {
            this._s_Awake_hdl_user_signal(__e, compartment);
            return;
        }
    }

    private void _state_Asleep(MiniHsmFrameEvent __e, MiniHsmCompartment compartment) {
        if (__e._message == "$>") {
            this._s_Asleep_hdl_frame_enter(__e, compartment);
            return;
        }
        if (__e._message == "signal") {
            this._s_Asleep_hdl_user_signal(__e, compartment);
            return;
        }
        if (__e._message == "wake") {
            this._s_Asleep_hdl_user_wake(__e, compartment);
            return;
        }
    }

    private void _s_Live_hdl_user_signal(MiniHsmFrameEvent __e, MiniHsmCompartment compartment) {

    }

    private void _s_Live_hdl_user_sleep(MiniHsmFrameEvent __e, MiniHsmCompartment compartment) {

    }

    private void _s_Live_hdl_user_wake(MiniHsmFrameEvent __e, MiniHsmCompartment compartment) {

    }

    private void _s_Awake_hdl_frame_enter(MiniHsmFrameEvent __e, MiniHsmCompartment compartment) {
        self.awakes = self.awakes + 1
    }

    private void _s_Awake_hdl_user_signal(MiniHsmFrameEvent __e, MiniHsmCompartment compartment) {
        self.last = 1;
        _state_Live(__e, compartment.parent_compartment);
    }

    private void _s_Asleep_hdl_frame_enter(MiniHsmFrameEvent __e, MiniHsmCompartment compartment) {
        self.sleeps = self.sleeps + 1
    }

    private void _s_Asleep_hdl_user_signal(MiniHsmFrameEvent __e, MiniHsmCompartment compartment) {
        self.last = 2;
        _state_Live(__e, compartment.parent_compartment);
    }

    private void _s_Asleep_hdl_user_wake(MiniHsmFrameEvent __e, MiniHsmCompartment compartment) {
        { MiniHsmCompartment __next = __prepareEnter("Awake", new List<object>(), new List<object>());
        __transition(__next); }
        return;
    }
}
