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use std::ffi::{c_void, CStr, CString};

use crate::{
    bindings::{
        mono_class_get_name, mono_method_desc_new, mono_method_desc_search_in_class,
        mono_object_new, MonoAssembly, MonoClass, MonoDomain, MonoImage,
    },
    method::ClassMethod,
    object::Object,
    void_ptr::MonoVoidPtr,
};

pub struct Class {
    pub mono_assembly: *mut MonoAssembly,
    pub mono_class: *mut MonoClass,
    pub mono_domain: *mut MonoDomain,
    pub mono_image: *mut MonoImage,
}

impl Class {
    pub fn create_object(&self) -> Object {
        Object {
            mono_assembly: self.mono_assembly,
            mono_class: self.mono_class,
            mono_domain: self.mono_domain,
            mono_image: self.mono_image,
            mono_object: unsafe { mono_object_new(self.mono_domain, self.mono_class) },
        }
    }

    pub fn get_name(&self) -> String {
        unsafe {
            CStr::from_ptr(mono_class_get_name(self.mono_class))
                .to_string_lossy()
                .to_string()
        }
    }

    pub fn get_method_by_name(&self, name: &'static str) -> ClassMethod {
        let class_name = self.get_name();
        let method_name = CString::new(format!("{}:{}()", class_name, name)).unwrap();
        let method_desc = unsafe { mono_method_desc_new(method_name.as_ptr(), 0) };
        let method = unsafe { mono_method_desc_search_in_class(method_desc, self.mono_class) };
        ClassMethod {
            mono_assembly: self.mono_assembly,
            mono_class: self.mono_class,
            mono_domain: self.mono_domain,
            mono_image: self.mono_image,
            mono_method: method,
        }
    }
}

impl MonoVoidPtr for Class {
    fn mono_void_ptr(self) -> *mut c_void {
        self.mono_class as *mut c_void
    }
}