---
source: framec/tests/csharp_snapshots.rs
expression: "compile_fixture(\"09_return_explicit\", \"csharp\")"
---
using System;
using System.Collections.Generic;
using System.Threading.Tasks;

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

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

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

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

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

class ReturnExplicitCompartment {
    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 ReturnExplicitFrameEvent? forward_event;
    public ReturnExplicitCompartment? parent_compartment;

    public ReturnExplicitCompartment(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 ReturnExplicitCompartment Copy() {
        ReturnExplicitCompartment c = new ReturnExplicitCompartment(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 ReturnExplicit {
    private List<ReturnExplicitCompartment> _state_stack;
    private ReturnExplicitCompartment __compartment;
    private ReturnExplicitCompartment? __next_compartment;
    private List<ReturnExplicitFrameContext> _context_stack;

    public ReturnExplicit() {
        _state_stack = new List<ReturnExplicitCompartment>();
        _context_stack = new List<ReturnExplicitFrameContext>();
        this.__compartment = __prepareEnter("Judging", new List<object>(), new List<object>());
        this.__next_compartment = null;
    }

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

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

    private Dictionary<string, List<string>> hsm_chain() {
        return new Dictionary<string, List<string>> {
            { "Judging", new List<string> { "Judging" } },
        };
    }
    private ReturnExplicitCompartment __prepareEnter(string leaf, List<object> state_args, List<object> enter_args) {
        ReturnExplicitCompartment? comp = null;
        foreach (string name in hsm_chain()[leaf]) {
            ReturnExplicitCompartment new_comp = new ReturnExplicitCompartment(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) {
        ReturnExplicitCompartment? comp = __compartment;
        while (comp != null) {
            comp.exit_args = new List<object>(exit_args);
            comp = comp.parent_compartment;
        }
    }

    private void __kernel(ReturnExplicitFrameEvent __e) {
        // Route event to current state.
        __router(__e);
        // Drain any transitions queued by the handler.
        while (__next_compartment != null) {
            ReturnExplicitCompartment next_compartment = __next_compartment!;
            __next_compartment = null;
            // Exit the current (leaf) state.
            ReturnExplicitFrameEvent exit_event = new ReturnExplicitFrameEvent("<$", __compartment.exit_args);
            __router(exit_event);
            // Switch to the new compartment.
            __compartment = next_compartment;
            // Three-branch forward-event handling.
            ReturnExplicitFrameEvent? forward_event = next_compartment.forward_event;
            next_compartment.forward_event = null;
            if (forward_event == null) {
                // No forwarded event — synthesize a fresh $>.
                ReturnExplicitFrameEvent enter_event = new ReturnExplicitFrameEvent("$>", __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 $>, then dispatch the forward.
                ReturnExplicitFrameEvent enter_event = new ReturnExplicitFrameEvent("$>", __compartment.enter_args);
                __router(enter_event);
                __router(forward_event);
            }
            foreach (var ctx in _context_stack) {
                ctx._transitioned = true;
            }
        }
    }

    private void __router(ReturnExplicitFrameEvent __e) {
        if (__compartment.state == "Judging") {
            _state_Judging(__e, __compartment);
        }
    }

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

    public string decide(int score) {
        ReturnExplicitFrameEvent __e = new ReturnExplicitFrameEvent("decide", new List<object> { score });
        ReturnExplicitFrameContext __ctx = new ReturnExplicitFrameContext(__e, null);
        _context_stack.Add(__ctx);
        try {
            __kernel(_context_stack[_context_stack.Count - 1]._event);
            var __result = (string) _context_stack[_context_stack.Count - 1]._return;
            _context_stack.RemoveAt(_context_stack.Count - 1);
            return __result;
        } catch {
            _context_stack.RemoveAt(_context_stack.Count - 1);
            throw;
        }
    }

    private void _state_Judging(ReturnExplicitFrameEvent __e, ReturnExplicitCompartment compartment) {
        if (__e._message == "decide") {
            this._s_Judging_hdl_user_decide(__e, compartment);
            return;
        }
    }

    private void _s_Judging_hdl_user_decide(ReturnExplicitFrameEvent __e, ReturnExplicitCompartment compartment) {
        int score = System.Convert.ToInt32(__e._parameters[0]);
                        if score >= 60 {
        _context_stack[_context_stack.Count - 1]._return = "pass";
                            return;
                        }
        _context_stack[_context_stack.Count - 1]._return = "fail";
                        return;
    }
}
