/*
 * The MIT License (MIT)
 * Copyright (C) 2024 Huawei Device Co., Ltd.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 */

use std::collections::{BTreeMap, HashMap};
use std::hash::{BuildHasher, Hash};

#[cfg(feature = "object_indexmap")]
use indexmap::IndexMap;

use crate::bindgen_prelude::{Env, Result, ToNapiValue, *};

impl<K, V, S> TypeName for HashMap<K, V, S> {
  fn type_name() -> &'static str {
    "HashMap"
  }

  fn value_type() -> ValueType {
    ValueType::Object
  }
}

impl<K: From<String> + Eq + Hash, V: FromNapiValue> ValidateNapiValue for HashMap<K, V> {}

impl<K, V, S> ToNapiValue for HashMap<K, V, S>
where
  K: AsRef<str>,
  V: ToNapiValue,
{
  unsafe fn to_napi_value(raw_env: sys::napi_env, val: Self) -> Result<sys::napi_value> {
    let env = Env::from(raw_env);
    let mut obj = env.create_object()?;
    for (k, v) in val.into_iter() {
      obj.set(k.as_ref(), v)?;
    }

    unsafe { Object::to_napi_value(raw_env, obj) }
  }
}

impl<K, V, S> FromNapiValue for HashMap<K, V, S>
where
  K: From<String> + Eq + Hash,
  V: FromNapiValue,
  S: Default + BuildHasher,
{
  unsafe fn from_napi_value(env: sys::napi_env, napi_val: sys::napi_value) -> Result<Self> {
    let obj = unsafe { Object::from_napi_value(env, napi_val)? };
    let mut map = HashMap::default();
    for key in Object::keys(&obj)?.into_iter() {
      if let Some(val) = obj.get(&key)? {
        map.insert(K::from(key), val);
      }
    }

    Ok(map)
  }
}

impl<K, V> TypeName for BTreeMap<K, V> {
  fn type_name() -> &'static str {
    "BTreeMap"
  }

  fn value_type() -> ValueType {
    ValueType::Object
  }
}

impl<K: From<String> + Ord, V: FromNapiValue> ValidateNapiValue for BTreeMap<K, V> {}

impl<K, V> ToNapiValue for BTreeMap<K, V>
where
  K: AsRef<str>,
  V: ToNapiValue,
{
  unsafe fn to_napi_value(raw_env: sys::napi_env, val: Self) -> Result<sys::napi_value> {
    let env = Env::from(raw_env);
    let mut obj = env.create_object()?;
    for (k, v) in val.into_iter() {
      obj.set(k.as_ref(), v)?;
    }

    unsafe { Object::to_napi_value(raw_env, obj) }
  }
}

impl<K, V> FromNapiValue for BTreeMap<K, V>
where
  K: From<String> + Ord,
  V: FromNapiValue,
{
  unsafe fn from_napi_value(env: sys::napi_env, napi_val: sys::napi_value) -> Result<Self> {
    let obj = unsafe { Object::from_napi_value(env, napi_val)? };
    let mut map = BTreeMap::default();
    for key in Object::keys(&obj)?.into_iter() {
      if let Some(val) = obj.get(&key)? {
        map.insert(K::from(key), val);
      }
    }

    Ok(map)
  }
}

#[cfg(feature = "object_indexmap")]
impl<K, V, S> TypeName for IndexMap<K, V, S> {
  fn type_name() -> &'static str {
    "IndexMap"
  }

  fn value_type() -> ValueType {
    ValueType::Object
  }
}

#[cfg(feature = "object_indexmap")]
impl<K: From<String> + Hash + Eq, V: FromNapiValue> ValidateNapiValue for IndexMap<K, V> {}

#[cfg(feature = "object_indexmap")]
impl<K, V, S> ToNapiValue for IndexMap<K, V, S>
where
  K: AsRef<str>,
  V: ToNapiValue,
  S: Default + BuildHasher,
{
  unsafe fn to_napi_value(raw_env: sys::napi_env, val: Self) -> Result<sys::napi_value> {
    let env = Env::from(raw_env);
    let mut obj = env.create_object()?;
    for (k, v) in val.into_iter() {
      obj.set(k.as_ref(), v)?;
    }

    unsafe { Object::to_napi_value(raw_env, obj) }
  }
}

#[cfg(feature = "object_indexmap")]
impl<K, V, S> FromNapiValue for IndexMap<K, V, S>
where
  K: From<String> + Hash + Eq,
  V: FromNapiValue,
  S: Default + BuildHasher,
{
  unsafe fn from_napi_value(env: sys::napi_env, napi_val: sys::napi_value) -> Result<Self> {
    let obj = unsafe { Object::from_napi_value(env, napi_val)? };
    let mut map = IndexMap::default();
    for key in Object::keys(&obj)?.into_iter() {
      if let Some(val) = obj.get(&key)? {
        map.insert(K::from(key), val);
      }
    }

    Ok(map)
  }
}