package java

import (
	"fmt"
	"os/exec"

	"zlh-agent/internal/state"
)

/*
   Verify validates that the Java dev container runtime is usable.

   Responsibilities:
   - Ensure `java` binary is present and executable
   - Ensure `javac` is present (development use case)

   IMPORTANT:
   - No installation here
   - No state mutation
   - Safe to call multiple times
*/
func Verify(cfg state.Config) error {

	// Check java runtime
	if _, err := exec.LookPath("java"); err != nil {
		return fmt.Errorf("java binary not found in PATH")
	}

	// Check Java compiler (dev requirement)
	if _, err := exec.LookPath("javac"); err != nil {
		return fmt.Errorf("javac binary not found in PATH")
	}

	return nil
}