enemize-rs/enemize/src/randomize.rs

use std::path::Path;

use anyhow::ensure;

use crate::option_flags::OptionFlags;
use crate::rom::RomData;
use crate::PatchSet;

impl RomData {
    pub fn randomize(
        &mut self,
        base_patch: &Path,
        option_flags: OptionFlags,
        seed: i32,
    ) -> anyhow::Result<()> {
        ensure!(
            self.is_randomizer(),
            "Enemizer only supports randomizer ROMs for input."
        );
        ensure!(!self.is_race(), "Enemizer does not support race roms.");

        if self.is_enemizer() {
            // Reuse seed in ROM, not the one given.
            self.reset_enemizer();
        } else {
            self.set_enemizer_seed(seed);
        }

        self.expand_rom();
        self.set_info_flags(option_flags)?;

        let patches = PatchSet::load(base_patch)?;
        patches.patch_rom(self);

        Ok(())
    }
}