1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153

use std::hash::Hash;

use naia_serde::{BitReader, BitWrite, BitWriter, Serde};

use crate::{
    bigmap::BigMapKey,
    protocol::{
        entity_handle::EntityHandle, net_entity::NetEntity, property::Property,
        property_mutate::PropertyMutator,
    },
};

#[derive(Clone)]
pub struct EntityProperty {
    handle_prop: Property<Option<EntityHandle>>,
}

impl EntityProperty {
    pub fn new(mutator_index: u8) -> Self {
        Self {
            handle_prop: Property::<Option<EntityHandle>>::new(None, mutator_index),
        }
    }

    pub fn mirror(&mut self, other: &EntityProperty) {
        *self.handle_prop = other.handle();
    }

    pub fn handle(&self) -> Option<EntityHandle> {
        *self.handle_prop
    }

    // Serialization / deserialization

    pub fn write(&self, writer: &mut dyn BitWrite, converter: &dyn NetEntityHandleConverter) {
        (*self.handle_prop)
            .map(|handle| converter.handle_to_net_entity(&handle))
            .ser(writer);
    }

    pub fn new_read(
        reader: &mut BitReader,
        mutator_index: u8,
        converter: &dyn NetEntityHandleConverter,
    ) -> Self {
        if let Some(net_entity) = Option::<NetEntity>::de(reader).unwrap() {
            let handle = converter.net_entity_to_handle(&net_entity);
            let mut new_prop = Self::new(mutator_index);
            *new_prop.handle_prop = Some(handle);
            return new_prop;
        } else {
            let mut new_prop = Self::new(mutator_index);
            *new_prop.handle_prop = None;
            return new_prop;
        }
    }

    pub fn read_write(bit_reader: &mut BitReader, bit_writer: &mut BitWriter) {
        Option::<NetEntity>::de(bit_reader).unwrap().ser(bit_writer);
    }

    pub fn read(&mut self, reader: &mut BitReader, converter: &dyn NetEntityHandleConverter) {
        if let Some(net_entity) = Option::<NetEntity>::de(reader).unwrap() {
            let handle = converter.net_entity_to_handle(&net_entity);
            *self.handle_prop = Some(handle);
        } else {
            *self.handle_prop = None;
        }
    }

    // Comparison

    pub fn equals(&self, other: &EntityProperty) -> bool {
        if let Some(handle) = *self.handle_prop {
            if let Some(other_handle) = *other.handle_prop {
                return handle == other_handle;
            }
            return false;
        }
        return other.handle_prop.is_none();
    }

    // Internal

    pub fn set_mutator(&mut self, mutator: &PropertyMutator) {
        self.handle_prop.set_mutator(mutator);
    }

    pub fn get<E: Copy + Eq + Hash>(&self, handler: &dyn EntityHandleConverter<E>) -> Option<E> {
        (*self.handle_prop).map(|handle| handler.handle_to_entity(&handle))
    }

    pub fn set<E: Copy + Eq + Hash>(&mut self, handler: &dyn EntityHandleConverter<E>, entity: &E) {
        let new_handle = handler.entity_to_handle(entity);
        *self.handle_prop = Some(new_handle);
    }
}

pub trait EntityHandleConverter<E: Copy + Eq + Hash> {
    fn handle_to_entity(&self, entity_handle: &EntityHandle) -> E;
    fn entity_to_handle(&self, entity: &E) -> EntityHandle;
}

pub trait NetEntityHandleConverter {
    fn handle_to_net_entity(&self, entity_handle: &EntityHandle) -> NetEntity;
    fn net_entity_to_handle(&self, net_entity: &NetEntity) -> EntityHandle;
}

pub trait NetEntityConverter<E: Copy + Eq + Hash> {
    fn entity_to_net_entity(&self, entity: &E) -> NetEntity;
    fn net_entity_to_entity(&self, net_entity: &NetEntity) -> E;
}

pub struct FakeEntityConverter;

impl NetEntityHandleConverter for FakeEntityConverter {
    fn handle_to_net_entity(&self, _: &EntityHandle) -> NetEntity {
        NetEntity::from(0)
    }

    fn net_entity_to_handle(&self, _: &NetEntity) -> EntityHandle {
        EntityHandle::from_u64(0)
    }
}

pub struct EntityConverter<'a, 'b, E: Eq + Copy + Hash> {
    handle_converter: &'a dyn EntityHandleConverter<E>,
    net_entity_converter: &'b dyn NetEntityConverter<E>,
}

impl<'a, 'b, E: Eq + Copy + Hash> EntityConverter<'a, 'b, E> {
    pub fn new(
        handle_converter: &'a dyn EntityHandleConverter<E>,
        net_entity_converter: &'b dyn NetEntityConverter<E>,
    ) -> Self {
        Self {
            handle_converter,
            net_entity_converter,
        }
    }
}

impl<'a, 'b, E: Copy + Eq + Hash> NetEntityHandleConverter for EntityConverter<'a, 'b, E> {
    fn handle_to_net_entity(&self, entity_handle: &EntityHandle) -> NetEntity {
        let entity = self.handle_converter.handle_to_entity(entity_handle);
        return self.net_entity_converter.entity_to_net_entity(&entity);
    }

    fn net_entity_to_handle(&self, net_entity: &NetEntity) -> EntityHandle {
        let entity = self.net_entity_converter.net_entity_to_entity(net_entity);
        return self.handle_converter.entity_to_handle(&entity);
    }
}