tailwind_rs_postcss/advanced_features/

dev_tools.rs

//! Development Tools
//! 
//! This module provides development tools for debugging, analysis,
//! and formatting of CSS code.

use std::collections::HashMap;
use super::types::*;

/// PostCSS development tools
pub struct PostCSSDevTools {
    debugger: CSSDebugger,
    inspector: CSSInspector,
    analyzer: CSSAnalyzer,
    formatter: CSSFormatter,
}

impl PostCSSDevTools {
    /// Create new development tools
    pub fn new() -> Self {
        Self {
            debugger: CSSDebugger::new(),
            inspector: CSSInspector::new(),
            analyzer: CSSAnalyzer::new(),
            formatter: CSSFormatter::new(),
        }
    }
    
    /// Debug CSS processing
    pub fn debug_processing(&self, css: &str, steps: &[ProcessingStep]) -> Result<DebugResult, AdvancedFeatureError> {
        let mut debug_info = DebugInfo::new();
        let mut current_css = css.to_string();
        
        for (i, step) in steps.iter().enumerate() {
            let step_debug = StepDebugInfo {
                step_name: step.name.clone(),
                step_index: i,
                input_css: current_css.clone(),
                input_size: current_css.len(),
                output_css: String::new(),
                output_size: 0,
                transformations: Vec::new(),
                performance: OperationMetrics {
                    operation: step.name.clone(),
                    duration: std::time::Duration::from_secs(0),
                    memory_delta: 0,
                    cpu_usage: 0.0,
                    input_size: current_css.len(),
                    output_size: 0,
                },
            };
            
            // Execute step with debugging
            let result = (step.execute)(&current_css)?;
            
            let mut step_debug = step_debug;
            step_debug.output_css = result.clone();
            step_debug.output_size = result.len();
            
            debug_info.steps.push(step_debug);
            current_css = result;
        }
        
        Ok(DebugResult {
            original_css: css.to_string(),
            final_css: current_css,
            debug_info: debug_info.clone(),
            total_steps: steps.len(),
            total_time: debug_info.total_time,
        })
    }
    
    /// Inspect CSS structure
    pub fn inspect_css(&self, css: &str) -> Result<InspectionResult, AdvancedFeatureError> {
        let ast = self.parse_css(css)?;
        
        let mut inspection = InspectionResult {
            total_rules: ast.rules.len(),
            total_properties: 0,
            total_selectors: 0,
            complexity_score: 0.0,
            maintainability_score: 0.0,
            issues: Vec::new(),
            recommendations: Vec::new(),
        };
        
        // Analyze rules
        for rule in &ast.rules {
            inspection.total_properties += rule.properties.len();
            inspection.total_selectors += 1;
            
            // Calculate complexity
            let rule_complexity = self.calculate_rule_complexity(rule);
            inspection.complexity_score += rule_complexity;
            
            // Check for issues
            if rule.properties.is_empty() {
                inspection.issues.push("Empty rule found".to_string());
            }
            
            if rule.selector.len() > 50 {
                inspection.issues.push("Long selector found".to_string());
            }
        }
        
        // Calculate maintainability score
        inspection.maintainability_score = self.calculate_maintainability_score(&inspection);
        
        // Generate recommendations
        inspection.recommendations = self.generate_recommendations(&inspection);
        
        Ok(inspection)
    }
    
    /// Format CSS code
    pub fn format_css(&self, css: &str, options: &FormatOptions) -> Result<String, AdvancedFeatureError> {
        let ast = self.parse_css(css)?;
        let mut formatted = String::new();
        
        // Apply formatting rules
        for rule in &options.rules {
            match rule {
                FormatRule::Indentation(indent) => {
                    formatted = self.apply_indentation(&ast, *indent)?;
                }
                FormatRule::LineBreaks(breaks) => {
                    formatted = self.apply_line_breaks(&ast, breaks)?;
                }
                FormatRule::Spacing(spacing) => {
                    formatted = self.apply_spacing(&ast, spacing)?;
                }
                FormatRule::Sorting(sort_options) => {
                    formatted = self.apply_sorting(&ast, sort_options)?;
                }
            }
        }
        
        Ok(formatted)
    }
    
    /// Analyze CSS structure
    pub fn analyze_css_structure(&self, css: &str) -> Result<AnalysisResult, AdvancedFeatureError> {
        let ast = self.parse_css(css)?;
        
        let mut analysis = CSSAnalysis {
            selectors: SelectorAnalysis {
                total_selectors: ast.rules.len(),
                complex_selectors: 0,
                duplicate_selectors: 0,
                specificity_scores: Vec::new(),
            },
            properties: PropertyAnalysis {
                total_properties: 0,
                duplicate_properties: 0,
                unused_properties: 0,
                property_usage: HashMap::new(),
            },
            specificity: SpecificityAnalysis {
                max_specificity: 0,
                avg_specificity: 0.0,
                high_specificity_selectors: Vec::new(),
            },
            performance: PerformanceAnalysis {
                estimated_size: css.len(),
                complexity_score: 0.0,
                optimization_opportunities: Vec::new(),
            },
            maintainability: MaintainabilityAnalysis {
                maintainability_score: 0.0,
                issues: Vec::new(),
                recommendations: Vec::new(),
            },
        };
        
        // Analyze selectors
        for rule in &ast.rules {
            analysis.selectors.total_selectors += 1;
            
            // Check for complex selectors
            if rule.selector.contains(' ') || rule.selector.contains('>') {
                analysis.selectors.complex_selectors += 1;
            }
            
            // Calculate specificity
            let specificity = self.calculate_specificity(&rule.selector);
            analysis.selectors.specificity_scores.push(specificity);
            analysis.specificity.max_specificity = analysis.specificity.max_specificity.max(specificity);
            
            if specificity > 3 {
                analysis.specificity.high_specificity_selectors.push(rule.selector.clone());
            }
        }
        
        // Calculate average specificity
        if !analysis.selectors.specificity_scores.is_empty() {
            analysis.specificity.avg_specificity = analysis.selectors.specificity_scores.iter().sum::<usize>() as f64 / analysis.selectors.specificity_scores.len() as f64;
        }
        
        // Analyze properties
        for rule in &ast.rules {
            analysis.properties.total_properties += rule.properties.len();
            
            for property in &rule.properties {
                *analysis.properties.property_usage.entry(property.name.clone()).or_insert(0) += 1;
            }
        }
        
        // Calculate performance metrics
        analysis.performance.complexity_score = self.calculate_css_complexity(&ast);
        
        // Calculate maintainability
        let maintainability_score = self.calculate_maintainability_score_analysis(&analysis);
        analysis.maintainability.maintainability_score = maintainability_score;
        
        let recommendations = self.generate_analysis_recommendations(&analysis);
        Ok(AnalysisResult {
            css: css.to_string(),
            analysis,
            recommendations,
        })
    }
    
    /// Parse CSS into AST
    fn parse_css(&self, css: &str) -> Result<CSSAST, AdvancedFeatureError> {
        // Simplified CSS parsing - would use proper CSS parser
        Ok(CSSAST {
            rules: self.parse_rules(css)?,
            comments: self.parse_comments(css)?,
        })
    }
    
    /// Parse CSS rules
    fn parse_rules(&self, css: &str) -> Result<Vec<CSSRule>, AdvancedFeatureError> {
        let mut rules = Vec::new();
        let rule_pattern = regex::Regex::new(r"([^{]+)\s*\{([^}]+)\}").unwrap();
        
        for cap in rule_pattern.captures_iter(css) {
            let selector = cap[1].trim().to_string();
            let properties = cap[2].trim().to_string();
            
            rules.push(CSSRule {
                selector,
                properties: self.parse_properties(&properties)?,
                line: 1, // Simplified
                column: 1,
            });
        }
        
        Ok(rules)
    }
    
    /// Parse CSS properties
    fn parse_properties(&self, properties_str: &str) -> Result<Vec<CSSProperty>, AdvancedFeatureError> {
        let mut properties = Vec::new();
        let property_pattern = regex::Regex::new(r"([^:]+):\s*([^;]+);").unwrap();
        
        for cap in property_pattern.captures_iter(properties_str) {
            properties.push(CSSProperty {
                name: cap[1].trim().to_string(),
                value: cap[2].trim().to_string(),
                important: cap[2].contains("!important"),
            });
        }
        
        Ok(properties)
    }
    
    /// Parse CSS comments
    fn parse_comments(&self, css: &str) -> Result<Vec<CSSComment>, AdvancedFeatureError> {
        let mut comments = Vec::new();
        let comment_pattern = regex::Regex::new(r"/\*([^*]|\*[^/])*\*/").unwrap();
        
        for cap in comment_pattern.captures_iter(css) {
            comments.push(CSSComment {
                content: cap[0].to_string(),
                line: 1, // Simplified
                column: 1,
            });
        }
        
        Ok(comments)
    }
    
    /// Calculate rule complexity
    fn calculate_rule_complexity(&self, rule: &CSSRule) -> f64 {
        let selector_complexity = rule.selector.len() as f64 * 0.1;
        let property_complexity = rule.properties.len() as f64 * 0.05;
        selector_complexity + property_complexity
    }
    
    /// Calculate maintainability score for inspection
    fn calculate_maintainability_score(&self, inspection: &InspectionResult) -> f64 {
        let mut score = 100.0;
        
        // Deduct for issues
        score -= inspection.issues.len() as f64 * 5.0;
        
        // Deduct for complexity
        score -= inspection.complexity_score * 0.1;
        
        (score as f64).max(0.0)
    }
    
    /// Calculate CSS complexity
    fn calculate_css_complexity(&self, ast: &CSSAST) -> f64 {
        let mut complexity = 0.0;
        
        for rule in &ast.rules {
            complexity += self.calculate_rule_complexity(rule);
        }
        
        complexity
    }
    
    /// Calculate maintainability score for analysis
    fn calculate_maintainability_score_analysis(&self, analysis: &CSSAnalysis) -> f64 {
        let mut score = 100.0;
        
        // Deduct for high specificity
        if analysis.specificity.max_specificity > 3 {
            score -= 10.0;
        }
        
        // Deduct for complex selectors
        if analysis.selectors.complex_selectors > analysis.selectors.total_selectors / 2 {
            score -= 15.0;
        }
        
        // Deduct for performance issues
        if analysis.performance.complexity_score > 10.0 {
            score -= 20.0;
        }
        
        (score as f64).max(0.0)
    }
    
    /// Generate recommendations
    fn generate_recommendations(&self, inspection: &InspectionResult) -> Vec<String> {
        let mut recommendations = Vec::new();
        
        if inspection.issues.contains(&"Empty rule found".to_string()) {
            recommendations.push("Remove empty CSS rules".to_string());
        }
        
        if inspection.issues.contains(&"Long selector found".to_string()) {
            recommendations.push("Simplify long CSS selectors".to_string());
        }
        
        if inspection.complexity_score > 10.0 {
            recommendations.push("Consider splitting complex CSS rules".to_string());
        }
        
        recommendations
    }
    
    /// Generate analysis recommendations
    fn generate_analysis_recommendations(&self, analysis: &CSSAnalysis) -> Vec<String> {
        let mut recommendations = Vec::new();
        
        if analysis.specificity.max_specificity > 3 {
            recommendations.push("Reduce CSS specificity for better maintainability".to_string());
        }
        
        if analysis.selectors.complex_selectors > analysis.selectors.total_selectors / 2 {
            recommendations.push("Simplify complex CSS selectors".to_string());
        }
        
        if analysis.performance.complexity_score > 10.0 {
            recommendations.push("Optimize CSS for better performance".to_string());
        }
        
        recommendations
    }
    
    /// Apply indentation formatting
    fn apply_indentation(&self, ast: &CSSAST, indent: usize) -> Result<String, AdvancedFeatureError> {
        let mut formatted = String::new();
        let indent_str = " ".repeat(indent);
        
        for rule in &ast.rules {
            formatted.push_str(&format!("{}{} {{\n", indent_str, rule.selector));
            
            for property in &rule.properties {
                formatted.push_str(&format!("{}{}: {};\n", indent_str.repeat(2), property.name, property.value));
            }
            
            formatted.push_str(&format!("{}}}\n", indent_str));
        }
        
        Ok(formatted)
    }
    
    /// Apply line breaks formatting
    fn apply_line_breaks(&self, ast: &CSSAST, breaks: &bool) -> Result<String, AdvancedFeatureError> {
        if *breaks {
            let mut formatted = String::new();
            
            for rule in &ast.rules {
                formatted.push_str(&format!("{}\n{{\n", rule.selector));
                
                for property in &rule.properties {
                    formatted.push_str(&format!("  {}: {};\n", property.name, property.value));
                }
                
                formatted.push_str("}\n\n");
            }
            
            Ok(formatted)
        } else {
            // Single line format
            let mut formatted = String::new();
            
            for rule in &ast.rules {
                formatted.push_str(&format!("{} {{ ", rule.selector));
                
                for property in &rule.properties {
                    formatted.push_str(&format!("{}: {}; ", property.name, property.value));
                }
                
                formatted.push_str("} ");
            }
            
            Ok(formatted)
        }
    }
    
    /// Apply spacing formatting
    fn apply_spacing(&self, ast: &CSSAST, _spacing: &SpacingRule) -> Result<String, AdvancedFeatureError> {
        // Simplified spacing implementation
        self.apply_line_breaks(ast, &true)
    }
    
    /// Apply sorting formatting
    fn apply_sorting(&self, ast: &CSSAST, _sort_options: &SortOptions) -> Result<String, AdvancedFeatureError> {
        // Simplified sorting implementation
        self.apply_line_breaks(ast, &true)
    }
    
    /// Calculate specificity
    fn calculate_specificity(&self, selector: &str) -> usize {
        let mut specificity = 0;
        
        // Count IDs
        specificity += selector.matches('#').count() * 100;
        
        // Count classes and attributes
        specificity += selector.matches('.').count() * 10;
        specificity += selector.matches('[').count() * 10;
        
        // Count elements
        specificity += selector.split_whitespace().count();
        
        specificity
    }
}

/// CSS debugger
pub struct CSSDebugger;

impl CSSDebugger {
    pub fn new() -> Self {
        Self
    }
}

/// CSS inspector
pub struct CSSInspector;

impl CSSInspector {
    pub fn new() -> Self {
        Self
    }
}

/// CSS analyzer
pub struct CSSAnalyzer;

impl CSSAnalyzer {
    pub fn new() -> Self {
        Self
    }
}

/// CSS formatter
pub struct CSSFormatter;

impl CSSFormatter {
    pub fn new() -> Self {
        Self
    }
}

/// Debug result
#[derive(Debug, Clone)]
pub struct DebugResult {
    pub original_css: String,
    pub final_css: String,
    pub debug_info: DebugInfo,
    pub total_steps: usize,
    pub total_time: std::time::Duration,
}

/// Inspection result
#[derive(Debug, Clone)]
pub struct InspectionResult {
    pub total_rules: usize,
    pub total_properties: usize,
    pub total_selectors: usize,
    pub complexity_score: f64,
    pub maintainability_score: f64,
    pub issues: Vec<String>,
    pub recommendations: Vec<String>,
}

/// Analysis result
#[derive(Debug, Clone)]
pub struct AnalysisResult {
    pub css: String,
    pub analysis: CSSAnalysis,
    pub recommendations: Vec<String>,
}

/// CSS AST structures
#[derive(Debug, Clone)]
pub struct CSSAST {
    pub rules: Vec<CSSRule>,
    pub comments: Vec<CSSComment>,
}

#[derive(Debug, Clone)]
pub struct CSSRule {
    pub selector: String,
    pub properties: Vec<CSSProperty>,
    pub line: usize,
    pub column: usize,
}

#[derive(Debug, Clone)]
pub struct CSSProperty {
    pub name: String,
    pub value: String,
    pub important: bool,
}

#[derive(Debug, Clone)]
pub struct CSSComment {
    pub content: String,
    pub line: usize,
    pub column: usize,
}

/// Processing step
pub struct ProcessingStep {
    pub name: String,
    pub execute: fn(&str) -> Result<String, AdvancedFeatureError>,
}

impl ProcessingStep {
    pub fn new(name: String, execute: fn(&str) -> Result<String, AdvancedFeatureError>) -> Self {
        Self { name, execute }
    }
}

#[cfg(test)]
mod tests {
    use super::*;
    
    #[test]
    fn test_dev_tools_creation() {
        let _tools = PostCSSDevTools::new();
        // Test that tools are created successfully
        assert!(true);
    }
    
    #[test]
    fn test_css_inspection() {
        let tools = PostCSSDevTools::new();
        let css = ".test { color: red; }";
        let result = tools.inspect_css(css);
        assert!(result.is_ok());
        
        let inspection = result.unwrap();
        assert_eq!(inspection.total_rules, 1);
        assert_eq!(inspection.total_properties, 1);
    }
    
    #[test]
    fn test_css_formatting() {
        let tools = PostCSSDevTools::new();
        let css = ".test{color:red;}";
        let options = FormatOptions::default();
        let result = tools.format_css(css, &options);
        assert!(result.is_ok());
        
        let formatted = result.unwrap();
        assert!(formatted.contains('\n'));
    }
    
    #[test]
    fn test_css_analysis() {
        let tools = PostCSSDevTools::new();
        let css = ".test { color: red; }";
        let result = tools.analyze_css_structure(css);
        assert!(result.is_ok());
        
        let analysis = result.unwrap();
        assert_eq!(analysis.analysis.selectors.total_selectors, 1);
        assert_eq!(analysis.analysis.properties.total_properties, 1);
    }
    
    #[test]
    fn test_processing_step() {
        let step = ProcessingStep::new(
            "test_step".to_string(),
            |input| Ok(input.to_string())
        );
        
        let result = (step.execute)("test");
        assert!(result.is_ok());
        assert_eq!(result.unwrap(), "test");
    }
}