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mod access;
mod mkdir;
mod read_dir;
mod read_file;
mod rm;
mod stats;
mod write_file;

use rquickjs::{
    module::{Declarations, Exports, ModuleDef},
    prelude::Func,
};
use rquickjs::{Class, Ctx, Object, Result};

use rquickjs::function::Async;

// use crate::{module_builder::ModuleInfo, modules::module::export_default};

use self::access::access;
use self::read_dir::{read_dir, read_dir_sync, Dirent};
use self::read_file::{read_file, read_file_sync};
use self::rm::{rmdir, rmfile};
use self::stats::{stat_fn, Stat};
use self::write_file::write_file;

use crate::modules::fs::{
    access::access_sync,
    mkdir::{mkdir, mkdir_sync, mkdtemp, mkdtemp_sync},
    rm::{rmdir_sync, rmfile_sync},
    stats::stat_fn_sync,
    write_file::write_file_sync,
};

use super::module::export_default;

pub const CONSTANT_F_OK: u32 = 0;
pub const CONSTANT_R_OK: u32 = 4;
pub const CONSTANT_W_OK: u32 = 2;
pub const CONSTANT_X_OK: u32 = 1;

pub struct FsPromisesModule;

impl ModuleDef for FsPromisesModule {
    fn declare(declare: &Declarations<'_>) -> Result<()> {
        declare.declare("access")?;
        declare.declare("open")?;
        declare.declare("readFile")?;
        declare.declare("writeFile")?;
        declare.declare("appendFile")?;
        declare.declare("copyFile")?;
        declare.declare("rename")?;
        declare.declare("readdir")?;
        declare.declare("mkdir")?;
        declare.declare("mkdtemp")?;
        declare.declare("rm")?;
        declare.declare("rmdir")?;
        declare.declare("stat")?;
        declare.declare("constants")?;

        declare.declare("default")?;

        Ok(())
    }

    fn evaluate<'js>(ctx: &Ctx<'js>, exports: &Exports<'js>) -> Result<()> {
        Class::<Dirent>::register(ctx)?;
        Class::<Stat>::register(ctx)?;

        export_default(ctx, exports, |default| {
            export_promises(ctx, default)?;

            Ok(())
        })
    }
}

// impl From<FsPromisesModule> for ModuleInfo<FsPromisesModule> {
//     fn from(val: FsPromisesModule) -> Self {
//         ModuleInfo {
//             name: "fs/promises",
//             module: val,
//         }
//     }
// }

pub struct FsModule;

impl ModuleDef for FsModule {
    fn declare(declare: &Declarations<'_>) -> Result<()> {
        declare.declare("promises")?;
        declare.declare("accessSync")?;
        declare.declare("mkdirSync")?;
        declare.declare("mkdtempSync")?;
        declare.declare("readdirSync")?;
        declare.declare("readFileSync")?;
        declare.declare("rmdirSync")?;
        declare.declare("rmSync")?;
        declare.declare("statSync")?;
        declare.declare("writeFileSync")?;

        declare.declare("default")?;

        Ok(())
    }

    fn evaluate<'js>(ctx: &Ctx<'js>, exports: &Exports<'js>) -> Result<()> {
        Class::<Dirent>::register(ctx)?;
        Class::<Stat>::register(ctx)?;

        export_default(ctx, exports, |default| {
            let promises = Object::new(ctx.clone())?;
            export_promises(ctx, &promises)?;

            default.set("promises", promises)?;
            default.set("accessSync", Func::from(access_sync))?;
            default.set("mkdirSync", Func::from(mkdir_sync))?;
            default.set("mkdtempSync", Func::from(mkdtemp_sync))?;
            default.set("readdirSync", Func::from(read_dir_sync))?;
            default.set("readFileSync", Func::from(read_file_sync))?;
            default.set("rmdirSync", Func::from(rmdir_sync))?;
            default.set("rmSync", Func::from(rmfile_sync))?;
            default.set("statSync", Func::from(stat_fn_sync))?;
            default.set("writeFileSync", Func::from(write_file_sync))?;

            Ok(())
        })
    }
}

fn export_promises<'js>(ctx: &Ctx<'js>, exports: &Object<'js>) -> Result<()> {
    let constants = Object::new(ctx.clone())?;
    constants.set("F_OK", CONSTANT_F_OK)?;
    constants.set("R_OK", CONSTANT_R_OK)?;
    constants.set("W_OK", CONSTANT_W_OK)?;
    constants.set("X_OK", CONSTANT_X_OK)?;

    exports.set("readdir", Func::from(Async(read_dir)))?;
    exports.set("readFile", Func::from(Async(read_file)))?;
    exports.set("writeFile", Func::from(Async(write_file)))?;
    exports.set("mkdir", Func::from(Async(mkdir)))?;
    exports.set("mkdtemp", Func::from(Async(mkdtemp)))?;
    exports.set("rmdir", Func::from(Async(rmdir)))?;
    exports.set("rm", Func::from(Async(rmfile)))?;
    exports.set("stat", Func::from(Async(stat_fn)))?;
    exports.set("access", Func::from(Async(access)))?;

    exports.set("constants", constants)?;

    Ok(())
}

// impl From<FsModule> for ModuleInfo<FsModule> {
//     fn from(val: FsModule) -> Self {
//         ModuleInfo {
//             name: "fs",
//             module: val,
//         }
//     }
// }