// SC2229: Variable used before assignment (placeholder - requires data flow analysis)
#[allow(unused_imports)]
use crate::linter::LintResult;

pub fn check(_source: &str) -> LintResult {
    // Placeholder: Complex rule requiring data flow analysis
    // Would need to:
    // 1. Track variable assignments across scopes
    // 2. Analyze control flow paths
    // 3. Detect reads before writes
    // 4. Handle function boundaries and exports
    // Implementation deferred pending AST-based analysis
    LintResult::new()
}

#[cfg(test)]
mod tests {
    use super::*;
    #[test]
    fn test_sc2229_placeholder() {
        let code = "echo $var\nvar=value";
        let result = check(code);
        assert_eq!(result.diagnostics.len(), 0); // Placeholder
    }
    #[test]
    fn test_sc2229_valid_order_placeholder() {
        let code = "var=value\necho $var";
        let result = check(code);
        assert_eq!(result.diagnostics.len(), 0); // Placeholder
    }
    #[test]
    fn test_sc2229_comment_placeholder() {
        let code = "# comment";
        let result = check(code);
        assert_eq!(result.diagnostics.len(), 0);
    }
    #[test]
    fn test_sc2229_no_code_placeholder() {
        let code = "";
        let result = check(code);
        assert_eq!(result.diagnostics.len(), 0);
    }
    #[test]
    fn test_sc2229_simple_placeholder() {
        let code = "echo test";
        let result = check(code);
        assert_eq!(result.diagnostics.len(), 0);
    }
    #[test]
    fn test_sc2229_function_scope_placeholder() {
        let code = "foo() { echo $x; }\nx=1\nfoo";
        let result = check(code);
        assert_eq!(result.diagnostics.len(), 0); // Placeholder
    }
    #[test]
    fn test_sc2229_conditional_placeholder() {
        let code = "if [ -n \"$var\" ]; then\n  var=value\nfi";
        let result = check(code);
        assert_eq!(result.diagnostics.len(), 0); // Placeholder
    }
    #[test]
    fn test_sc2229_loop_placeholder() {
        let code = "while [ $count -lt 10 ]; do\n  count=$((count + 1))\ndone";
        let result = check(code);
        assert_eq!(result.diagnostics.len(), 0); // Placeholder
    }
    #[test]
    fn test_sc2229_export_placeholder() {
        let code = "export VAR\nVAR=value";
        let result = check(code);
        assert_eq!(result.diagnostics.len(), 0); // Placeholder
    }
    #[test]
    fn test_sc2229_default_value_placeholder() {
        let code = r#"echo ${var:-default}"#;
        let result = check(code);
        assert_eq!(result.diagnostics.len(), 0); // Placeholder
    }
}
