hakorune/src/runner/modes/vm.rs

use super::super::NyashRunner;
use nyash_rust::{
    ast::ASTNode,
    parser::NyashParser,
    mir::MirCompiler,
};
use std::{fs, process};

impl NyashRunner {
    /// Execute VM mode with full plugin initialization and AST prelude merge
    pub(crate) fn execute_vm_mode(&self, filename: &str) {
        // Note: hv1 direct route is now handled at main.rs entry point (before plugin initialization).
        // This function is only called after plugin initialization has already occurred.

        // Quiet mode for child pipelines (e.g., selfhost compiler JSON emit)
        let quiet_pipe = crate::config::env::env_bool("NYASH_JSON_ONLY");

        // Enforce plugin-first policy for VM on this branch (deterministic):
        // - Initialize plugin host if not yet loaded
        // - Prefer plugin implementations for core boxes
        // - Optionally fail fast when plugins are missing (NYASH_VM_PLUGIN_STRICT=1)
        {
            // FileBox provider initialization (SSOT via ProviderFactory)
            use crate::runner::modes::common_util::provider_registry;
            use nyash_rust::runtime::provider_lock;

            // Register builtin FileBox factory (idempotent)
            #[cfg(feature = "builtin-filebox")]
            {
                nyash_rust::boxes::file::builtin_factory::register_builtin_filebox();
            }

            // Select provider based on mode (dynamic → builtin → core-ro)
            let filebox_mode = provider_registry::read_filebox_mode_from_env();
            let filebox_provider = provider_registry::select_file_provider(filebox_mode);
            if let Err(e) = provider_lock::set_filebox_provider(filebox_provider) {
                if !quiet_pipe {
                    eprintln!("[warn] FileBox provider already set: {}", e);
                }
            }

            // Initialize unified registry globals (idempotent)
            nyash_rust::runtime::init_global_unified_registry();

            // Init plugin host from nyash.toml if not yet loaded
            let need_init = {
                let host = nyash_rust::runtime::get_global_plugin_host();
                host.read()
                    .map(|h| h.config_ref().is_none())
                    .unwrap_or(true)
            };
            if need_init {
                // Let init_bid_plugins resolve hakorune.toml/nyash.toml and configure
                crate::runner_plugin_init::init_bid_plugins();
            }

            // Phase 21.4: Deprecation warnings for old ENV variables
            // No longer auto-setting NYASH_USE_PLUGIN_BUILTINS or NYASH_PLUGIN_OVERRIDE_TYPES
            // Use NYASH_BOX_FACTORY_POLICY and NYASH_FILEBOX_MODE instead
            if std::env::var("NYASH_USE_PLUGIN_BUILTINS").is_ok() {
                if !quiet_pipe {
                    eprintln!("[vm] warn: NYASH_USE_PLUGIN_BUILTINS is deprecated. Use NYASH_BOX_FACTORY_POLICY instead.");
                }
            }
            if std::env::var("NYASH_PLUGIN_OVERRIDE_TYPES").is_ok() {
                if !quiet_pipe {
                    eprintln!("[vm] warn: NYASH_PLUGIN_OVERRIDE_TYPES is deprecated. Use NYASH_BOX_FACTORY_POLICY instead.");
                }
            }

            // Centralized plugin guard
            let strict = crate::config::env::env_bool("NYASH_VM_PLUGIN_STRICT");
            crate::runner::modes::common_util::plugin_guard::check_and_report(
                strict,
                quiet_pipe,
                "vm",
            );
        }

        // Read the file
        let code = match fs::read_to_string(filename) {
            Ok(content) => content,
            Err(e) => {
                eprintln!("❌ Error reading file {}: {}", filename, e);
                process::exit(1);
            }
        };

        // Unified using/prelude handling (SSOT):
        // - resolve_prelude_paths_profiled: discover preludes (DFS, operator boxes, etc.)
        // - merge_prelude_text: text-based merge for all VM paths
        //   * .hako プレリュードは AST に突っ込まない（Parse error防止）
        //   * .hako は text-merge + Stage-3 parser で一貫処理
        let trace = crate::config::env::cli_verbose()
            || crate::config::env::env_bool("NYASH_RESOLVE_TRACE");

        // When using is enabled, resolve preludes/profile; otherwise, keep original code.
        let mut code_final = if crate::config::env::enable_using() {
            match crate::runner::modes::common_util::resolve::resolve_prelude_paths_profiled(
                self,
                &code,
                filename,
            ) {
                Ok((_, prelude_paths)) => {
                    if !prelude_paths.is_empty() {
                        // SSOT: always text-merge for VM (includes .hako-safe handling inside)
                        match crate::runner::modes::common_util::resolve::merge_prelude_text(
                            self,
                            &code,
                            filename,
                        ) {
                            Ok(merged) => {
                                if trace {
                                    eprintln!(
                                        "[using/text-merge] preludes={} (vm)",
                                        prelude_paths.len()
                                    );
                                }
                                merged
                            }
                            Err(e) => {
                                eprintln!("❌ {}", e);
                                process::exit(1);
                            }
                        }
                    } else {
                        code.clone()
                    }
                }
                Err(e) => {
                    eprintln!("❌ {}", e);
                    process::exit(1);
                }
            }
        } else {
            // using disabled: detect and fail fast if present
            if code.contains("\nusing ") || code.trim_start().starts_with("using ") {
                eprintln!(
                    "❌ using: prelude merge is disabled in this profile. Enable NYASH_USING_AST=1 or remove 'using' lines."
                );
                process::exit(1);
            }
            code
        };

        // Dev sugar pre-expand: @name = expr → local name = expr
        code_final =
            crate::runner::modes::common_util::resolve::preexpand_at_local(&code_final);

        // Hako-friendly normalize: strip leading `local ` at line head for Nyash parser compatibility.
        if crate::runner::modes::common_util::hako::looks_like_hako_code(&code_final)
            || filename.ends_with(".hako")
        {
            code_final =
                crate::runner::modes::common_util::hako::strip_local_decl(&code_final);
        }

        // Optional: dump merged Hako source after using/prelude merge and Hako normalization.
        // Guarded by env; defaultはOFF（Phase 25.1a selfhost builder デバッグ用）。
        if std::env::var("NYASH_VM_DUMP_MERGED_HAKO")
            .ok()
            .as_deref()
            == Some("1")
        {
            let default_path = {
                let mut tmp = std::env::temp_dir();
                tmp.push("nyash_merged_vm.hako");
                tmp
            };
            let path = std::env::var("NYASH_VM_DUMP_MERGED_HAKO_PATH")
                .ok()
                .filter(|p| !p.is_empty())
                .unwrap_or_else(|| default_path.to_string_lossy().into_owned());

            if let Err(e) = fs::write(&path, &code_final) {
                if trace {
                    eprintln!("[vm/merged-hako] failed to write {}: {}", path, e);
                }
            } else if trace
                || crate::config::env::env_bool("NYASH_VM_DUMP_MERGED_HAKO_LOG")
            {
                eprintln!("[vm/merged-hako] dumped merged code to {}", path);
            }
        }

        if trace && (std::env::var("NYASH_PARSER_STAGE3").ok() == Some("1".into())
            || std::env::var("HAKO_PARSER_STAGE3").ok() == Some("1".into()))
        {
            eprintln!("[vm] Stage-3: enabled (env) for {}", filename);
        }

        // Fail‑Fast (opt‑in): Hako 構文を Nyash VM 経路で実行しない
        // 目的: .hako は Hakorune VM、MIR は Core/LLVM に役割分離するためのガード
        {
            let on = crate::runner::modes::common_util::hako::fail_fast_on_hako();
            if on {
                let hako_like = code_final.contains("static box ")
                    || code_final.contains("using selfhost.")
                    || code_final.contains("using hakorune.");
                if hako_like {
                    eprintln!(
                        "❌ Hako-like source detected in Nyash VM path. Use Hakorune VM (v1 dispatcher) or Core/LLVM for MIR.\n   hint: set HAKO_VERIFY_PRIMARY=hakovm in verify path"
                    );
                    process::exit(1);
                }
            }
        }

        // Parse main code (after text-merge and Hako normalization)
        let ast_combined = match NyashParser::parse_from_string(&code_final) {
            Ok(ast) => ast,
            Err(e) => {
                eprintln!("❌ Parse error in {}: {}", filename, e);
                // Enhanced context: list merged prelude files if any
                let preludes = crate::runner::modes::common_util::resolve::clone_last_merged_preludes();
                if !preludes.is_empty() {
                    eprintln!("[parse/context] merged prelude files ({}):", preludes.len());
                    let show = std::cmp::min(16, preludes.len());
                    for p in preludes.iter().take(show) {
                        eprintln!("  - {}", p);
                    }
                    if preludes.len() > show {
                        eprintln!("  ... ({} more)", preludes.len() - show);
                    }
                }
                process::exit(1);
            }
        };

        // Optional: dump AST statement kinds for quick diagnostics
        if std::env::var("NYASH_AST_DUMP").ok().as_deref() == Some("1") {
            eprintln!("[ast] dump start (vm)");
            if let ASTNode::Program { statements, .. } = &ast_combined {
                for (i, st) in statements.iter().enumerate().take(50) {
                    let kind = match st {
                        ASTNode::BoxDeclaration {
                            is_static, name, ..
                        } => {
                            if *is_static {
                                format!("StaticBox({})", name)
                            } else {
                                format!("Box({})", name)
                            }
                        }
                        ASTNode::FunctionDeclaration { name, .. } => format!("FuncDecl({})", name),
                        ASTNode::FunctionCall { name, .. } => format!("FuncCall({})", name),
                        ASTNode::MethodCall { method, .. } => format!("MethodCall({})", method),
                        ASTNode::ScopeBox { .. } => "ScopeBox".to_string(),
                        ASTNode::ImportStatement { path, .. } => format!("Import({})", path),
                        ASTNode::UsingStatement { namespace_name, .. } => {
                            format!("Using({})", namespace_name)
                        }
                        _ => format!("{:?}", st),
                    };
                    eprintln!("[ast] {}: {}", i, kind);
                }
            }
            eprintln!("[ast] dump end");
        }

        // Macro expand (if enabled)
        let ast = crate::r#macro::maybe_expand_and_dump(&ast_combined, false);

        // Minimal user-defined Box support (inline factory)
        let static_box_decls = {
            use crate::{
                box_factory::{BoxFactory, RuntimeError},
                core::model::BoxDeclaration as CoreBoxDecl,
                instance_v2::InstanceBox,
            };
            use std::sync::{Arc, RwLock};

            // Collect user-defined (non-static) box declarations at program level.
            // Additionally, record static box names so we can alias
            // `StaticBoxName` -> `StaticBoxNameInstance` when such a
            // concrete instance box exists (common pattern in libs).
            // Also collect static box declarations for VM singleton persistence.
            let mut nonstatic_decls: std::collections::HashMap<String, CoreBoxDecl> =
                std::collections::HashMap::new();
            let mut static_names: Vec<String> = Vec::new();
            let mut static_box_decls: std::collections::HashMap<String, CoreBoxDecl> =
                std::collections::HashMap::new();
            if let ASTNode::Program { statements, .. } = &ast {
                for st in statements {
                    if let ASTNode::BoxDeclaration {
                        name,
                        fields,
                        public_fields,
                        private_fields,
                        methods,
                        constructors,
                        init_fields,
                        weak_fields,
                        is_interface,
                        extends,
                        implements,
                        type_parameters,
                        is_static,
                        ..
                    } = st {
                        if *is_static {
                            static_names.push(name.clone());
                            // Store static box declaration for VM singleton persistence
                            let static_decl = CoreBoxDecl {
                                name: name.clone(),
                                fields: fields.clone(),
                                public_fields: public_fields.clone(),
                                private_fields: private_fields.clone(),
                                methods: methods.clone(),
                                constructors: constructors.clone(),
                                init_fields: init_fields.clone(),
                                weak_fields: weak_fields.clone(),
                                is_interface: *is_interface,
                                extends: extends.clone(),
                                implements: implements.clone(),
                                type_parameters: type_parameters.clone(),
                            };
                            static_box_decls.insert(name.clone(), static_decl);
                            continue; // modules/static boxes are not user-instantiable directly
                        }
                        let decl = CoreBoxDecl {
                            name: name.clone(),
                            fields: fields.clone(),
                            public_fields: public_fields.clone(),
                            private_fields: private_fields.clone(),
                            methods: methods.clone(),
                            constructors: constructors.clone(),
                            init_fields: init_fields.clone(),
                            weak_fields: weak_fields.clone(),
                            is_interface: *is_interface,
                            extends: extends.clone(),
                            implements: implements.clone(),
                            type_parameters: type_parameters.clone(),
                        };
                        nonstatic_decls.insert(name.clone(), decl);
                    }
                }
            }
            // Phase 25.1b: Include static boxes in user factory for NewBox support
            // Static boxes are singletons (via VM's register_static_box_decl) but must also
            // be advertised by user factory so NewBox doesn't fall through to plugin route.
            //
            // Build final map:
            // 1. Start with nonstatic_decls (regular user boxes)
            // 2. Add static_box_decls (for NewBox support, VM will ensure singleton)
            // 3. Add StaticName -> StaticNameInstance aliases if present
            let mut decls = nonstatic_decls.clone();

            // Add static box declarations (VM singleton instances)
            // nonstatic takes precedence if name conflicts (rare but possible)
            for (name, sdecl) in static_box_decls.iter() {
                if !decls.contains_key(name) {
                    decls.insert(name.clone(), sdecl.clone());
                }
            }

            // Add StaticName -> StaticNameInstance aliases if present
            for s in static_names.into_iter() {
                let inst = format!("{}Instance", s);
                if let Some(d) = nonstatic_decls.get(&inst) {
                    decls.insert(s, d.clone());
                }
            }

            if !decls.is_empty() {
                // Inline factory: minimal User factory backed by collected declarations
                struct InlineUserBoxFactory {
                    decls: Arc<RwLock<std::collections::HashMap<String, CoreBoxDecl>>>,
                }
                impl BoxFactory for InlineUserBoxFactory {
                    fn create_box(
                        &self,
                        name: &str,
                        args: &[Box<dyn crate::box_trait::NyashBox>],
                    ) -> Result<Box<dyn crate::box_trait::NyashBox>, RuntimeError> {
                        let opt = { self.decls.read().unwrap().get(name).cloned() };
                        let decl = match opt {
                            Some(d) => d,
                            None => {
                                return Err(RuntimeError::InvalidOperation {
                                    message: format!("Unknown Box type: {}", name),
                                })
                            }
                        };
                        let mut inst = InstanceBox::from_declaration(
                            decl.name.clone(),
                            decl.fields.clone(),
                            decl.methods.clone(),
                        );
                        let _ = inst.init(args);
                        Ok(Box::new(inst))
                    }

                    fn box_types(&self) -> Vec<&str> {
                        // Can't return borrowed strings from temporary RwLock guard
                        // Registry will try create_box() regardless of this list
                        vec![]
                    }

                    fn is_available(&self) -> bool {
                        true
                    }

                    fn factory_type(&self) -> crate::box_factory::FactoryType {
                        crate::box_factory::FactoryType::User
                    }
                }
                let factory = InlineUserBoxFactory {
                    decls: Arc::new(RwLock::new(decls)),
                };
                crate::runtime::unified_registry::register_user_defined_factory(std::sync::Arc::new(factory));
            }

            // Return static_box_decls for VM registration
            static_box_decls
        };

        // Compile to MIR
        let mut compiler = MirCompiler::with_options(!self.config.no_optimize);
        let compile = match compiler.compile(ast) {
            Ok(c) => c,
            Err(e) => {
                eprintln!("❌ MIR compilation error: {}", e);
                process::exit(1);
            }
        };

        // Optional barrier-elision for parity with fallback path
        let mut module_vm = compile.module.clone();
        if crate::config::env::env_bool("NYASH_VM_ESCAPE_ANALYSIS") {
            let removed = crate::mir::passes::escape::escape_elide_barriers_vm(&mut module_vm);
            if removed > 0 {
                crate::cli_v!(
                    "[VM] escape_elide_barriers: removed {} barriers",
                    removed
                );
            }
        }

        // Optional: dump MIR for diagnostics
        if crate::config::env::env_bool("NYASH_VM_DUMP_MIR") {
            let p = crate::mir::MirPrinter::new();
            eprintln!("{}", p.print_module(&module_vm));
        }

        // Execute via MIR interpreter
        use crate::backend::MirInterpreter;
        let mut vm = MirInterpreter::new();

        // Register static box declarations for singleton persistence
        for (name, decl) in static_box_decls {
            vm.register_static_box_decl(name, decl);
        }

        // Optional: verify MIR before execution (dev-only)
        if crate::config::env::env_bool("NYASH_VM_VERIFY_MIR") {
            let mut verifier = crate::mir::verification::MirVerifier::new();
            for (name, func) in module_vm.functions.iter() {
                if let Err(errors) = verifier.verify_function(func) {
                    if !errors.is_empty() {
                        eprintln!("[vm-verify] function: {}", name);
                        for er in errors {
                            eprintln!("  • {}", er);
                        }
                    }
                }
            }
        }

        if std::env::var("NYASH_DUMP_FUNCS").ok().as_deref() == Some("1") {
            eprintln!("[vm] functions available:");
            for k in module_vm.functions.keys() {
                eprintln!("  - {}", k);
            }
        }

        match vm.execute_module(&module_vm) {
            Ok(ret) => {
                use crate::box_trait::{NyashBox, IntegerBox, BoolBox};

                // Extract exit code from return value
                let exit_code = if let Some(ib) = ret.as_any().downcast_ref::<IntegerBox>() {
                    ib.value as i32
                } else if let Some(bb) = ret.as_any().downcast_ref::<BoolBox>() {
                    if bb.value { 1 } else { 0 }
                } else {
                    // For non-integer/bool returns, default to 0 (success)
                    0
                };

                // Optional: print lightweight VM counters for diagnostics
                if crate::config::env::env_bool("NYASH_VM_STATS") {
                    let (inst, br, cmp) = vm.stats_counters();
                    eprintln!("[vm/stats] inst={} compare={} branch={}", inst, cmp, br);
                }

                // Quiet mode: suppress "RC:" output for JSON-only pipelines
                if !quiet_pipe {
                    println!("RC: {}", exit_code);
                }

                // Exit with the return value as exit code
                process::exit(exit_code);
            }
            Err(e) => {
                eprintln!("❌ [rust-vm] VM error: {}", e);
                process::exit(1);
            }
        }
    }
}