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use byteorder::{BigEndian, ByteOrder};

pub struct WiiMemory {
    mem1: Vec<u8>,
    mem2: Vec<u8>,
}

impl WiiMemory {
    pub fn new() -> Self {
        WiiMemory {
            mem1: vec!(0; 0x180_0000),
            mem2: vec!(0; 0x400_0000),
        }
    }

    pub fn write_u8(&mut self, address: usize, value: u8) {
        if address >= 0x8000_0000 && address < 0x8180_0000 {
            self.mem1[address - 0x8000_0000] = value;
        }
        else if address >= 0x9000_0000 && address < 0x9400_0000 {
            self.mem2[address - 0x9000_0000] = value;
        }
        else {
            error!("Failed to write value: 0x{:x} Cannot map address 0x{:x} to wii memory", value, address);
        }
    }

    pub fn write_u16(&mut self, address: usize, value: u16) {
        if address >= 0x8000_0000 && address < 0x8180_0000 {
            BigEndian::write_u16(&mut self.mem1[address - 0x8000_0000 ..], value);
        }
        else if address >= 0x9000_0000 && address < 0x9400_0000 {
            BigEndian::write_u16(&mut self.mem2[address - 0x9000_0000 ..], value);
        }
        else {
            error!("Failed to write value: 0x{:x} Cannot map address 0x{:x} to wii memory", value, address);
        }
    }

    pub fn write_u32(&mut self, address: usize, value: u32) {
        if address >= 0x8000_0000 && address < 0x8180_0000 {
            BigEndian::write_u32(&mut self.mem1[address - 0x8000_0000 ..], value);
        }
        else if address >= 0x9000_0000 && address < 0x9400_0000 {
            BigEndian::write_u32(&mut self.mem2[address - 0x9000_0000 ..], value);
        }
        else {
            error!("Failed to write value: 0x{:x} Cannot map address 0x{:x} to wii memory", value, address);
        }
    }

    pub fn read_u8(&self, address: usize) -> u8 {
        if address >= 0x8000_0000 && address < 0x8180_0000 {
            return self.mem1[address - 0x8000_0000];
        } else if address >= 0x9000_0000 && address < 0x9400_0000 {
            return self.mem2[address - 0x9000_0000];
        } else {
            error!("Failed to read value: Cannot map address 0x{:x} to wii memory", address);
            0
        }
    }

    pub fn read_u16(&self, address: usize) -> u16 {
        if address >= 0x8000_0000 && address < 0x8180_0000 {
            BigEndian::read_u16(&self.mem1[address - 0x8000_0000 ..])
        } else if address >= 0x9000_0000 && address < 0x9400_0000 {
             BigEndian::read_u16(&self.mem2[address - 0x9000_0000 ..])
        } else {
            error!("Failed to read value: Cannot map address 0x{:x} to wii memory", address);
            0
        }
    }

    pub fn read_u32(&self, address: usize) -> u32 {
        if address >= 0x8000_0000 && address < 0x8180_0000 {
            BigEndian::read_u32(&self.mem1[address - 0x8000_0000 ..])
        } else if address >= 0x9000_0000 && address < 0x9400_0000 {
             BigEndian::read_u32(&self.mem2[address - 0x9000_0000 ..])
        } else {
            error!("Failed to read value: Cannot map address 0x{:x} to wii memory", address);
            0
        }
    }

    pub fn read_f32(&self, address: usize) -> f32 {
        if address >= 0x8000_0000 && address < 0x8180_0000 {
            BigEndian::read_f32(&self.mem1[address - 0x8000_0000 ..])
        } else if address >= 0x9000_0000 && address < 0x9400_0000 {
             BigEndian::read_f32(&self.mem2[address - 0x9000_0000 ..])
        } else {
            error!("Failed to read value: Cannot map address 0x{:x} to wii memory", address);
            0.0
        }
    }

    pub fn buffer_from(&self, address: usize) -> &[u8] {
        if address >= 0x8000_0000 && address < 0x8180_0000 {
            &self.mem1[address - 0x8000_0000..]
        } else if address >= 0x9000_0000 && address < 0x9400_0000 {
            &self.mem2[address - 0x9000_0000..]
        } else {
            error!("Failed to get buffer: Cannot map address 0x{:x} to wii memory", address);
            &[]
        }
    }
}