#![allow(dead_code, unused_mut, unused_variables, unused_imports)]

use anyhow::{ensure, Result};
use std::os::unix::process::CommandExt;

pub const KERNEL_SU_OPTION: u32 = 0xDEADBEEF;

const CMD_GRANT_ROOT: u64 = 0;
// const CMD_BECOME_MANAGER: u64 = 1;
const CMD_GET_VERSION: u64 = 2;
// const CMD_ALLOW_SU: u64 = 3;
// const CMD_DENY_SU: u64 = 4;
// const CMD_GET_ALLOW_LIST: u64 = 5;
// const CMD_GET_DENY_LIST: u64 = 6;
const CMD_REPORT_EVENT: u64 = 7;
pub const CMD_SET_SEPOLICY: u64 = 8;

const EVENT_POST_FS_DATA: u64 = 1;
const EVENT_BOOT_COMPLETED: u64 = 2;

#[cfg(target_os = "android")]
pub fn grant_root() -> Result<()> {
    let mut result: u32 = 0;
    unsafe {
        libc::prctl(
            KERNEL_SU_OPTION as i32,
            CMD_GRANT_ROOT,
            0,
            0,
            &mut result as *mut _ as *mut libc::c_void,
        );
    }

    ensure!(result == KERNEL_SU_OPTION, "grant root failed");
    return Err(std::process::Command::new("sh").exec().into());
}

#[cfg(not(target_os = "android"))]
pub fn grant_root() -> Result<()> {
    unimplemented!("grant_root is only available on android");
}

pub fn get_version() -> i32 {
    let mut result: i32 = 0;
    #[cfg(target_os = "android")]
    unsafe {
        libc::prctl(
            KERNEL_SU_OPTION as i32,
            CMD_GET_VERSION,
            &mut result as *mut _ as *mut libc::c_void,
        );
    }
    result
}

fn report_event(event: u64) {
    #[cfg(target_os = "android")]
    unsafe {
        libc::prctl(KERNEL_SU_OPTION as i32, CMD_REPORT_EVENT, event);
    }
}

pub fn report_post_fs_data() {
    report_event(EVENT_POST_FS_DATA);
}

pub fn report_boot_complete() {
    report_event(EVENT_BOOT_COMPLETED);
}