use crate::structs::{Settings, StructError, StructResult};
use crate::ArchiveError;
use serde::{ser, Serialize};

pub struct ArchiveSerializer {
    bytes: Vec<u8>,
    settings: Settings,
}

impl ArchiveSerializer {
    pub fn new(settings: Settings) -> Self {
        Self {
            bytes: Vec::new(),
            settings,
        }
    }

    pub fn to_bytes(self) -> Vec<u8> {
        self.bytes
    }
}

impl ser::Serializer for &mut ArchiveSerializer {
    type Ok = ();
    type Error = ArchiveError<StructError>;

    type SerializeSeq = Self;
    type SerializeTuple = Self;
    type SerializeTupleStruct = Self;
    type SerializeTupleVariant = Self;
    type SerializeMap = Self;
    type SerializeStruct = Self;
    type SerializeStructVariant = Self;

    fn serialize_bool(self, v: bool) -> StructResult<()> {
        self.bytes.push(v as u8);
        Ok(())
    }

    fn serialize_i8(self, v: i8) -> StructResult<()> {
        self.bytes.push(v as u8);
        Ok(())
    }

    fn serialize_i16(self, v: i16) -> StructResult<()> {
        self.bytes.append(&mut self.settings.byte_order.i16(v));
        Ok(())
    }

    fn serialize_i32(self, v: i32) -> StructResult<()> {
        self.bytes.append(&mut self.settings.byte_order.i32(v));
        Ok(())
    }

    fn serialize_i64(self, v: i64) -> StructResult<()> {
        self.bytes.append(&mut self.settings.byte_order.i64(v));
        Ok(())
    }

    fn serialize_u8(self, v: u8) -> StructResult<()> {
        self.bytes.push(v);
        Ok(())
    }

    fn serialize_u16(self, v: u16) -> StructResult<()> {
        self.bytes.append(&mut self.settings.byte_order.u16(v));
        Ok(())
    }

    fn serialize_u32(self, v: u32) -> StructResult<()> {
        self.bytes.append(&mut self.settings.byte_order.u32(v));
        Ok(())
    }

    fn serialize_u64(self, v: u64) -> StructResult<()> {
        self.bytes.append(&mut self.settings.byte_order.u64(v));
        Ok(())
    }

    fn serialize_f32(self, v: f32) -> StructResult<()> {
        self.bytes.append(&mut self.settings.byte_order.f32(v));
        Ok(())
    }

    fn serialize_f64(self, v: f64) -> StructResult<()> {
        self.bytes.append(&mut self.settings.byte_order.f64(v));
        Ok(())
    }

    fn serialize_char(self, v: char) -> StructResult<()> {
        self.bytes.push(v as u8);
        Ok(())
    }

    fn serialize_str(self, v: &str) -> StructResult<()> {
        self.bytes.append(&mut v.as_bytes().to_vec());
        Ok(())
    }

    fn serialize_bytes(self, v: &[u8]) -> StructResult<()> {
        self.bytes.append(&mut v.to_vec());
        Ok(())
    }

    fn serialize_none(self) -> StructResult<()> {
        Ok(())
    }

    fn serialize_some<T>(self, value: &T) -> StructResult<()>
    where
        T: ?Sized + Serialize,
    {
        value.serialize(self)
    }

    fn serialize_unit(self) -> StructResult<()> {
        Ok(())
    }

    fn serialize_unit_struct(self, _name: &'static str) -> StructResult<()> {
        self.serialize_unit()
    }

    fn serialize_unit_variant(
        self,
        _name: &'static str,
        variant_index: u32,
        _variant: &'static str,
    ) -> StructResult<()> {
        self.bytes.append(
            &mut self
                .settings
                .variant_index_type
                .cast(variant_index, &self.settings.byte_order)?,
        );
        Ok(())
    }

    fn serialize_newtype_struct<T>(self, _name: &'static str, value: &T) -> StructResult<()>
    where
        T: ?Sized + Serialize,
    {
        value.serialize(self)
    }

    fn serialize_newtype_variant<T>(
        self,
        _name: &'static str,
        variant_index: u32,
        _variant: &'static str,
        value: &T,
    ) -> StructResult<()>
    where
        T: ?Sized + Serialize,
    {
        self.bytes.append(
            &mut self
                .settings
                .variant_index_type
                .cast(variant_index, &self.settings.byte_order)?,
        );
        value.serialize(self)
    }

    fn serialize_seq(self, _len: Option<usize>) -> StructResult<Self::SerializeSeq> {
        Ok(self)
    }

    fn serialize_tuple(self, _len: usize) -> StructResult<Self::SerializeTuple> {
        Ok(self)
    }

    fn serialize_tuple_struct(
        self,
        _name: &'static str,
        _len: usize,
    ) -> StructResult<Self::SerializeTupleStruct> {
        Ok(self)
    }

    fn serialize_tuple_variant(
        self,
        _name: &'static str,
        variant_index: u32,
        _variant: &'static str,
        _len: usize,
    ) -> StructResult<Self::SerializeTupleVariant> {
        self.bytes.append(
            &mut self
                .settings
                .variant_index_type
                .cast(variant_index, &self.settings.byte_order)?,
        );
        Ok(self)
    }

    fn serialize_map(self, _len: Option<usize>) -> StructResult<Self::SerializeMap> {
        Ok(self)
    }

    fn serialize_struct(
        self,
        _name: &'static str,
        _len: usize,
    ) -> StructResult<Self::SerializeStruct> {
        Ok(self)
    }

    fn serialize_struct_variant(
        self,
        _name: &'static str,
        variant_index: u32,
        _variant: &'static str,
        _len: usize,
    ) -> StructResult<Self::SerializeStructVariant> {
        self.bytes.append(
            &mut self
                .settings
                .variant_index_type
                .cast(variant_index, &self.settings.byte_order)?,
        );
        Ok(self)
    }
}

impl ser::SerializeSeq for &mut ArchiveSerializer {
    type Ok = ();
    type Error = ArchiveError<StructError>;

    fn serialize_element<T>(&mut self, value: &T) -> StructResult<()>
    where
        T: ?Sized + Serialize,
    {
        value.serialize(&mut **self)
    }

    fn end(self) -> StructResult<()> {
        Ok(())
    }
}

impl ser::SerializeTuple for &mut ArchiveSerializer {
    type Ok = ();
    type Error = ArchiveError<StructError>;

    fn serialize_element<T>(&mut self, value: &T) -> StructResult<()>
    where
        T: ?Sized + Serialize,
    {
        value.serialize(&mut **self)
    }

    fn end(self) -> StructResult<()> {
        Ok(())
    }
}

impl ser::SerializeTupleStruct for &mut ArchiveSerializer {
    type Ok = ();
    type Error = ArchiveError<StructError>;

    fn serialize_field<T>(&mut self, value: &T) -> StructResult<()>
    where
        T: ?Sized + Serialize,
    {
        value.serialize(&mut **self)
    }

    fn end(self) -> StructResult<()> {
        Ok(())
    }
}

impl ser::SerializeTupleVariant for &mut ArchiveSerializer {
    type Ok = ();
    type Error = ArchiveError<StructError>;

    fn serialize_field<T>(&mut self, value: &T) -> StructResult<()>
    where
        T: ?Sized + Serialize,
    {
        value.serialize(&mut **self)
    }

    fn end(self) -> StructResult<()> {
        Ok(())
    }
}

impl ser::SerializeMap for &mut ArchiveSerializer {
    type Ok = ();
    type Error = ArchiveError<StructError>;

    fn serialize_key<T>(&mut self, key: &T) -> StructResult<()>
    where
        T: ?Sized + Serialize,
    {
        key.serialize(&mut **self)
    }

    fn serialize_value<T>(&mut self, value: &T) -> StructResult<()>
    where
        T: ?Sized + Serialize,
    {
        value.serialize(&mut **self)
    }

    fn end(self) -> StructResult<()> {
        Ok(())
    }
}

impl ser::SerializeStruct for &mut ArchiveSerializer {
    type Ok = ();
    type Error = ArchiveError<StructError>;

    fn serialize_field<T>(&mut self, _key: &'static str, value: &T) -> StructResult<()>
    where
        T: ?Sized + Serialize,
    {
        value.serialize(&mut **self)
    }

    fn end(self) -> StructResult<()> {
        Ok(())
    }
}

impl ser::SerializeStructVariant for &mut ArchiveSerializer {
    type Ok = ();
    type Error = ArchiveError<StructError>;

    fn serialize_field<T>(&mut self, _key: &'static str, value: &T) -> StructResult<()>
    where
        T: ?Sized + Serialize,
    {
        value.serialize(&mut **self)
    }

    fn end(self) -> StructResult<()> {
        Ok(())
    }
}