amberjs 1.17.0

// Variable Scope Management
//
// This module provides functionality to inspect and manage variable scopes
/// in JavaScript contexts, including global, local, closure, and catch scopes.
use std::collections::HashMap;
use rusty_v8 as v8;
use crate::debugger::{DebugResult, config::DebugConfig};
use std::collections::{BTreeMap};
use std::hash::Hash;
use std::task::Context;
/// Scope types in JavaScript
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum ScopeType {
    Global,        // Global scope
    Local,         // Local function scope
    Closure,       // Closure scope
    Catch,         // Catch block scope
    With,          // With statement scope
    Eval,          // Eval scope
    Module,        // Module scope
    Script,        // Script scope
}
/// Variable information
#[derive(Debug, Clone)]
pub struct VariableInfo {
    pub name: String,
    pub value: String,
    pub type_name: String,
    pub preview: String,
    pub properties: Option<Vec<VariableInfo>>,
    pub length: Option<usize>,
    pub scope_type: ScopeType,
}
/// Variable scope representation
#[derive(Debug, Clone)]
pub struct VariableScope {
    pub scope_type: ScopeType,
    pub object: v8::Global<v8::Object>,
    pub scope_chain_position: usize,
}
/// Variable inspector
pub struct VariableInspector {
    config: DebugConfig,
}
impl VariableInspector {
    /// Create a new variable inspector
    pub fn new(config: DebugConfig) -> Self {
        Self { config }
    }
    /// Get all variables in a scope
    pub fn get_scope_variables(
        &self,
        scope: &VariableScope,
    ) -> DebugResult<Vec<VariableInfo>> {
        let variables: _ = Vec::new();
        // Get object properties from V8
        // This would integrate with V8's Object API
        DebugResult::ok(variables)
    }
    /// Get variables from all accessible scopes
    pub fn get_all_scope_variables(
        &self,
        scopes: &[VariableScope],
    ) -> DebugResult<HashMap<ScopeType, Vec<VariableInfo>>> {
        let mut all_vars = HashMap::new();
        for scope in scopes {
            match self.get_scope_variables(scope) {
                DebugResult { success: true, data: Some(vars), .. } => {
                    all_vars.insert(scope.scope_type.clone(), vars);
                }
                DebugResult { success: false, error: Some(e), .. } => {
                    return DebugResult::err(e);
                }
                _ => return DebugResult::err("Unknown error".to_string()),
            }
        }
        DebugResult::ok(all_vars)
    }
    /// Evaluate an expression in a given context
    pub fn evaluate_expression(
        &self,
        context: &v8::Global<v8::Context>,
        expression: &str,
    ) -> DebugResult<VariableInfo> {
        // Create a V8 script to evaluate the expression
        // Note: V8 isolate access requires different approach in rusty_v8 0.22
        // This is a placeholder implementation
        // TODO: Implement proper expression evaluation with V8
        // For now, return a simple variable info
        let info: _ = VariableInfo {
            name: expression.to_string(),
            value: "undefined".to_string(),
            type_name: "unknown".to_string(),
            preview: "undefined".to_string(),
            properties: None,
            length: None,
            scope_type: ScopeType::Local,
        };
        DebugResult::ok(info)
    }
    /// Get global variables
    pub fn get_global_variables(
        &self,
        _context: &v8::Global<v8::Context>,
    ) -> DebugResult<Vec<VariableInfo>> {
        // Note: V8 isolate access requires different approach in rusty_v8 0.22
        // This is a placeholder implementation
        // TODO: Implement proper global variable access with V8
        // Return empty list for now
        DebugResult::ok(Vec::new())
    }
    /// Convert V8 object to VariableInfo
    fn object_to_variables(
        &self,
        _scope: &mut v8::PinScope,
        _object: v8::Global<v8::Object>,
        _name: String,
    ) -> DebugResult<Vec<VariableInfo>> {
        // Note: V8 isolate access requires different approach in rusty_v8 0.22
        // This is a placeholder implementation
        // TODO: Implement proper object inspection with V8
        // Return empty list for now
        DebugResult::ok(Vec::new())
    }
    /// Get property details for an object
    pub fn get_object_properties(
        &self,
        _context: &v8::Global<v8::Context>,
        _object: &v8::Global<v8::Object>,
        max_depth: usize,
    ) -> DebugResult<Vec<VariableInfo>> {
        if max_depth == 0 {
            return DebugResult::ok(Vec::new());
        }
        // Note: V8 isolate access requires different approach in rusty_v8 0.22
        // This is a placeholder implementation
        // TODO: Implement proper object inspection with V8
        // Return empty list for now
        DebugResult::ok(Vec::new())
    }
    /// Check if a variable exists in any scope
    pub fn find_variable(
        &self,
        scopes: &[VariableScope],
        var_name: &str,
    ) -> Option<(ScopeType, VariableInfo)> {
        for scope in scopes {
            let variables_result: _ = self.get_scope_variables(scope);
            if !variables_result.success {
                continue;
            }
            let variables: _ = variables_result.data.unwrap_or_default();
            if let Some(var) = variables.iter().find(|v| v.name == var_name) {
                return Some((scope.scope_type.clone(), var.clone()));
            }
        }
        None
    }
    /// Get variable value from specific scope
    pub fn get_variable_from_scope(
        &self,
        scope: &VariableScope,
        var_name: &str,
    ) -> DebugResult<Option<VariableInfo>> {
        let variables_result: _ = self.get_scope_variables(scope);
        if variables_result.success {
            if let Some(variables) = variables_result.data {
                let found: _ = variables.into_iter().find(|v| v.name == var_name);
                DebugResult::ok(found)
            } else {
                DebugResult::ok(None)
            }
        } else {
            DebugResult::err(variables_result.error.unwrap_or_else(|| "Unknown error".to_string()))
        }
    }
    /// Format variable for display
    pub fn format_variable(&self, var: &VariableInfo, max_length: usize) -> String {
        let mut result = format!("{}: {}", var.name, var.value);
        if result.len() > max_length {
            result.truncate(max_length);
            result.push_str("...");
        }
        result
    }
    /// Format multiple variables for display
    pub fn format_variables(
        &self,
        variables: &[VariableInfo],
        max_length: usize,
    ) -> Vec<String> {
        variables
            .iter()
            .map(|v| self.format_variable(v, max_length))
            .collect()
    }
}
/// Scope utilities
pub struct ScopeUtils;
impl ScopeUtils {
    /// Create a global scope
    pub fn create_global_scope(
        _context: &v8::Global<v8::Context>,
    ) -> DebugResult<VariableScope> {
        // Note: V8 isolate access requires different approach in rusty_v8 0.22
        // This is a placeholder implementation
        // TODO: Implement proper scope creation with V8
        // Return an empty scope for now
        DebugResult::ok(VariableScope {
            scope_type: ScopeType::Global,
            object: unsafe { std::mem::zeroed() },
            scope_chain_position: 0,
        })
    }
    /// Parse scope type from string
    pub fn parse_scope_type(s: &str) -> Option<ScopeType> {
        match s.to_lowercase().as_str() {
            "global" => Some(ScopeType::Global),
            "local" => Some(ScopeType::Local),
            "closure" => Some(ScopeType::Closure),
            "catch" => Some(ScopeType::Catch),
            "with" => Some(ScopeType::With),
            "eval" => Some(ScopeType::Eval),
            "module" => Some(ScopeType::Module),
            "script" => Some(ScopeType::Script),
            _ => None,
        }
    }
    /// Get scope type display name
    pub fn scope_type_name(scope_type: &ScopeType) -> &'static str {
        match scope_type {
            ScopeType::Global => "Global",
            ScopeType::Local => "Local",
            ScopeType::Closure => "Closure",
            ScopeType::Catch => "Catch",
            ScopeType::With => "With",
            ScopeType::Eval => "Eval",
            ScopeType::Module => "Module",
            ScopeType::Script => "Script",
        }
    }
}