// TOOD: `pub(super) for most of these?`

use std::convert::Into;
use std::path::PathBuf;
use std::io::{Read};
use std::fs::File;

use byteorder::{LittleEndian, ReadBytesExt};
use rand::Rng;
use thiserror::Error;

use crate::ship::monster::MonsterType;
use crate::ship::room::{Episode, RoomMode};

// TODO: don't use *
use crate::ship::map::*;

#[derive(Debug, Copy, Clone, PartialEq)]
pub enum MapArea {
    Pioneer2Ep1,
    Forest1,
    Forest2,
    Caves1,
    Caves2,
    Caves3,
    Mines1,
    Mines2,
    Ruins1,
    Ruins2,
    Ruins3,
    Dragon,
    DeRolLe,
    VolOpt,
    DarkFalz,
    Pioneer2Ep2,
    VrTempleAlpha,
    VrTempleBeta,
    VrSpaceshipAlpha,
    VrSpaceshipBeta,
    Cca,
    JungleAreaNorth,
    JungleAreaEast,
    Mountain,
    Seaside,
    SeabedUpper,
    SeabedLower,
    GalGryphon,
    OlgaFlow,
    BarbaRay,
    GolDragon,
    SeasideNight,
    Tower,
    Pioneer2Ep4,
    CraterEast,
    CraterWest,
    CraterSouth,
    CraterNorth,
    CraterInterior,
    SubDesert1,
    SubDesert2,
    SubDesert3,
    SaintMillion,
    // TestMapEp4,
}

#[derive(Error, Debug)]
#[error("")]
pub enum MapAreaError {
    UnknownMapArea(u16),
}

impl MapArea {
    pub fn from_value(episode: &Episode, area: u16) -> Result<MapArea, MapAreaError> {
        match (episode, area) {
            (Episode::One, 0) => Ok(MapArea::Pioneer2Ep1),
            (Episode::One, 1) => Ok(MapArea::Forest1),
            (Episode::One, 2) => Ok(MapArea::Forest2),
            (Episode::One, 3) => Ok(MapArea::Caves1),
            (Episode::One, 4) => Ok(MapArea::Caves2),
            (Episode::One, 5) => Ok(MapArea::Caves3),
            (Episode::One, 6) => Ok(MapArea::Mines1),
            (Episode::One, 7) => Ok(MapArea::Mines2),
            (Episode::One, 8) => Ok(MapArea::Ruins1),
            (Episode::One, 9) => Ok(MapArea::Ruins2),
            (Episode::One, 10) => Ok(MapArea::Ruins3),
            (Episode::One, 11) => Ok(MapArea::Dragon),
            (Episode::One, 12) => Ok(MapArea::DeRolLe),
            (Episode::One, 13) => Ok(MapArea::VolOpt),
            (Episode::One, 14) => Ok(MapArea::DarkFalz),
            (Episode::Two, 0) => Ok(MapArea::Pioneer2Ep2),
            (Episode::Two, 1) => Ok(MapArea::VrTempleAlpha),
            (Episode::Two, 2) => Ok(MapArea::VrTempleBeta),
            (Episode::Two, 3) => Ok(MapArea::VrSpaceshipAlpha),
            (Episode::Two, 4) => Ok(MapArea::VrSpaceshipBeta),
            (Episode::Two, 5) => Ok(MapArea::Cca),
            (Episode::Two, 6) => Ok(MapArea::JungleAreaNorth),
            (Episode::Two, 7) => Ok(MapArea::JungleAreaEast),
            (Episode::Two, 8) => Ok(MapArea::Mountain),
            (Episode::Two, 9) => Ok(MapArea::Seaside),
            (Episode::Two, 10) => Ok(MapArea::SeabedUpper),
            (Episode::Two, 11) => Ok(MapArea::SeabedLower),
            (Episode::Two, 12) => Ok(MapArea::GalGryphon),
            (Episode::Two, 13) => Ok(MapArea::OlgaFlow),
            (Episode::Two, 14) => Ok(MapArea::BarbaRay),
            (Episode::Two, 15) => Ok(MapArea::GolDragon),
            (Episode::Two, 16) => Ok(MapArea::SeasideNight),
            (Episode::Two, 17) => Ok(MapArea::Tower),
            (Episode::Four, 0) => Ok(MapArea::Pioneer2Ep4),
            (Episode::Four, 1) => Ok(MapArea::CraterEast),
            (Episode::Four, 2) => Ok(MapArea::CraterWest),
            (Episode::Four, 3) => Ok(MapArea::CraterSouth),
            (Episode::Four, 4) => Ok(MapArea::CraterNorth),
            (Episode::Four, 5) => Ok(MapArea::CraterInterior),
            (Episode::Four, 6) => Ok(MapArea::SubDesert1),
            (Episode::Four, 7) => Ok(MapArea::SubDesert2),
            (Episode::Four, 8) => Ok(MapArea::SubDesert3),
            (Episode::Four, 9) => Ok(MapArea::SaintMillion),
            // (Episode::Four, 10) => Ok(MapArea::TestMapEp4),
            _ => Err(MapAreaError::UnknownMapArea(area))
        }
    }

    pub fn drop_area_value(&self) -> Option<u32> {
        match self {
            MapArea::Forest1 => Some(0),
            MapArea::Forest2 => Some(1),
            MapArea::Caves1 => Some(2),
            MapArea::Caves2 => Some(3),
            MapArea::Caves3 => Some(4),
            MapArea::Mines1 => Some(5),
            MapArea::Mines2 => Some(6),
            MapArea::Ruins1 => Some(7),
            MapArea::Ruins2 => Some(8),
            MapArea::Ruins3 => Some(9),
            MapArea::Dragon => Some(2),
            MapArea::DeRolLe => Some(5),
            MapArea::VolOpt => Some(7),
            MapArea::DarkFalz => Some(9),
            
            MapArea::VrTempleAlpha => Some(0),
            MapArea::VrTempleBeta => Some(1),
            MapArea::VrSpaceshipAlpha => Some(2),
            MapArea::VrSpaceshipBeta => Some(3),
            MapArea::Cca => Some(4),
            MapArea::JungleAreaNorth => Some(5),
            MapArea::JungleAreaEast => Some(5),
            MapArea::Mountain => Some(6),
            MapArea::Seaside => Some(7),
            MapArea::SeabedUpper => Some(8),
            MapArea::SeabedLower => Some(9),
            MapArea::GalGryphon => Some(8),
            MapArea::OlgaFlow => Some(9),
            MapArea::BarbaRay => Some(2),
            MapArea::GolDragon => Some(5),
            MapArea::SeasideNight => Some(7),
            MapArea::Tower => Some(9),

            MapArea::CraterEast => Some(2),
            MapArea::CraterWest => Some(3),
            MapArea::CraterSouth => Some(4),
            MapArea::CraterNorth => Some(5),
            MapArea::CraterInterior => Some(6),
            MapArea::SubDesert1 => Some(7),
            MapArea::SubDesert2 => Some(8),
            MapArea::SubDesert3 => Some(9),
            MapArea::SaintMillion => Some(9),
            // MapArea::TestMapEp4 => Some(0),
            _ => None
        }
    }

    pub fn area_value(&self) -> u8 {
        match self {
            MapArea::Pioneer2Ep1 => 0,
            MapArea::Forest1 => 1,
            MapArea::Forest2 => 2,
            MapArea::Caves1 => 3,
            MapArea::Caves2 => 4,
            MapArea::Caves3 => 5,
            MapArea::Mines1 => 6,
            MapArea::Mines2 => 7,
            MapArea::Ruins1 => 8,
            MapArea::Ruins2 => 9,
            MapArea::Ruins3 => 10,
            MapArea::Dragon => 11,
            MapArea::DeRolLe => 12,
            MapArea::VolOpt => 13,
            MapArea::DarkFalz => 14,
            MapArea::Pioneer2Ep2 => 0,
            MapArea::VrTempleAlpha => 1,
            MapArea::VrTempleBeta => 2,
            MapArea::VrSpaceshipAlpha => 3,
            MapArea::VrSpaceshipBeta => 4,
            MapArea::Cca => 5,
            MapArea::JungleAreaNorth => 6,
            MapArea::JungleAreaEast => 7,
            MapArea::Mountain => 8,
            MapArea::Seaside => 9,
            MapArea::SeabedUpper => 10,
            MapArea::SeabedLower => 11,
            MapArea::GalGryphon => 12,
            MapArea::OlgaFlow => 13,
            MapArea::BarbaRay => 14,
            MapArea::GolDragon => 15,
            MapArea::SeasideNight => 16,
            MapArea::Tower => 17,
            MapArea::Pioneer2Ep4 => 0,
            MapArea::CraterEast => 1,
            MapArea::CraterWest => 2,
            MapArea::CraterSouth => 3,
            MapArea::CraterNorth => 4,
            MapArea::CraterInterior => 5,
            MapArea::SubDesert1 => 6,
            MapArea::SubDesert2 => 7,
            MapArea::SubDesert3 => 8,
            MapArea::SaintMillion => 9,
            // MapArea::TestMapEp4 => 10,
        }
    }
}