yog-cli 0.48.0

//! What a content reference (`@<kind>:<id>`) can name, for the designers'
//! pickers — the same three sources `yog build` checks references against:
//! the mod's own content (`content/`), the other mods' ids it declares in
//! `yog.toml` (`[external.<namespace>]`) and the game's (read from the
//! client jar on this machine, when there is one). And the mod's own
//! `.ydef`s of a kind with what they say (an advancement's parent, an
//! effect's color), for the designers that draw several at once.

use std::collections::HashMap;
use std::path::{Path, PathBuf};
use yog_ids::Format;
use yog_sync::{Mutex, OnceLock};

use yog_data::Value;

use crate::design::assets::{Resources, Vanilla};
use crate::design::project::{self, mod_root};

/// Kinds of content defined by files of their own, by extension; any other
/// kind is the `.ydef`s of that `kind`.
const FILE_KINDS: [(&str, &[Format]); 4] = [
    (yog_ids::kind::ITEM, &[Format::Item, Format::Block]),
    (yog_ids::kind::BLOCK, &[Format::Block]),
    (yog_ids::kind::ENTITY, &[Format::Entity]),
    (yog_ids::kind::RECIPE, &[Format::Recipe]),
];

/// Body files (`.ymodel`, `.yanim`): named by their path under `content/`
/// without the extension (`body/wings`), as an entity's `model` names them.
const BODY_FORMATS: [Format; 2] = [Format::Model, Format::Anim];

/// Resources defined by files of their own under `resources/`, named by
/// their path there without the extension (`block/glass`).
const RESOURCE_KINDS: [(&str, Format); 2] = [
    (yog_ids::kind::TEXTURE, Format::Texture),
    (yog_ids::kind::MATERIAL, Format::Material),
];

/// Where the game's ids of a kind are in its client jar: translation keys
/// of its lang (`entity.minecraft.pig` → `pig`; `dotted`: the rest may hold
/// dots, `generic.max_health`), files of its data folders (by kind), or the
/// keys of one of its assets (`sounds.json`: sound events).
enum GameIds {
    /// Keys starting with the game's `<kind>.minecraft.` of each of these kinds.
    Lang {
        kinds: &'static [&'static str],
        dotted: bool,
    },
    /// A prefix of its own (`attribute.name.`).
    LangPrefix(&'static str),
    Data,
    Keys(&'static str),
}

/// The game's sound events: the keys of its `sounds.json`.
const SOUNDS_ASSET: &str = yog_ids::res::SOUNDS_JSON;
/// Attributes' translation keys: `attribute.name.generic.max_health`.
const ATTRIBUTE_LANG_PREFIX: &str = "attribute.name.";
/// The game's potions' item names: `item.minecraft.potion.effect.<name>`, a Yog potion alias.
const POTION_LANG_PREFIX: &str = "potion.effect.";

const GAME_IDS: [(&str, GameIds); 12] = [
    (
        yog_ids::kind::ITEM,
        GameIds::Lang {
            kinds: &[yog_ids::kind::ITEM, yog_ids::kind::BLOCK],
            dotted: false,
        },
    ),
    (
        yog_ids::kind::BLOCK,
        GameIds::Lang {
            kinds: &[yog_ids::kind::BLOCK],
            dotted: false,
        },
    ),
    (
        yog_ids::kind::ENTITY,
        GameIds::Lang {
            kinds: &[yog_ids::kind::ENTITY],
            dotted: false,
        },
    ),
    (
        yog_ids::kind::EFFECT,
        GameIds::Lang {
            kinds: &[yog_ids::kind::EFFECT],
            dotted: false,
        },
    ),
    (
        yog_ids::kind::ATTRIBUTE,
        GameIds::LangPrefix(ATTRIBUTE_LANG_PREFIX),
    ),
    (
        yog_ids::kind::BIOME,
        GameIds::Lang {
            kinds: &[yog_ids::kind::BIOME],
            dotted: false,
        },
    ),
    (
        ENCHANTMENT,
        GameIds::Lang {
            kinds: &[ENCHANTMENT],
            dotted: false,
        },
    ),
    (yog_ids::kind::LOOT_TABLE, GameIds::Data),
    (yog_ids::kind::ADVANCEMENT, GameIds::Data),
    (yog_ids::kind::DAMAGE_TYPE, GameIds::Data),
    (yog_ids::kind::RECIPE, GameIds::Data),
    (SOUND, GameIds::Keys(SOUNDS_ASSET)),
];

/// Kinds of the game's content a reference may name that no Yog file defines.
const ENCHANTMENT: &str = "enchantment";
const SOUND: &str = "sound";

/// The kinds whose game tags a reference may name (`tag:<kind>`).
const GAME_TAG_KINDS: [&str; 6] = [
    yog_ids::kind::ITEM,
    yog_ids::kind::BLOCK,
    yog_ids::kind::ENTITY,
    yog_ids::kind::FLUID,
    yog_ids::kind::BIOME,
    yog_ids::kind::DAMAGE_TYPE,
];

/// One of the mod's own: its id and the file that defines it.
#[derive(Debug, Clone, PartialEq, yog_data::Schema)]
pub struct OwnRef {
    pub id: String,
    pub file: String,
}

/// What a reference of one kind may name, ids with their namespace.
#[derive(Debug, Default, yog_data::Schema)]
pub struct RefChoices {
    pub own: Vec<OwnRef>,
    /// Declared in `yog.toml`, another mod's.
    pub external: Vec<String>,
    /// The game's (`minecraft:…`); empty without a client jar.
    pub game: Vec<String>,
}

/// One of the mod's `.ydef`s: its id, its file and what it says.
#[derive(Debug, yog_data::Schema)]
pub struct OwnDef {
    pub id: String,
    pub file: String,
    pub value: Value,
}

fn files(root: &Path, format: Format) -> Vec<PathBuf> {
    crate::files::of(&root.join(yog_ids::project::CONTENT), format)
}

/// A content file that's one object.
fn read(file: &Path) -> Option<Value> {
    yog_data::text::parse_value(&crate::files::read_source(file).ok()?)
        .ok()
        .filter(|v| matches!(v, Value::Map(_)))
}

/// The choices for `@<kind>:` in the file at `file` (`kind` may also be a
/// body format, `ymodel`/`yanim`, or `tag:<kind>` — the tags of a kind:
/// the mod's own `.ydef` tags of it, the game's).
pub fn refs(file: &Path, kind: &str) -> RefChoices {
    let mut out = RefChoices::default();
    if let Some(root) = mod_root(file) {
        out.own = own(&root, kind);
        out.external = external(&root, kind);
    }
    if body_format(kind).is_none() {
        out.game = game(mod_root(file).as_deref(), kind);
    }
    out
}

/// `kind` as a body format (`ymodel`, `yanim`).
fn body_format(kind: &str) -> Option<Format> {
    Format::of(kind).filter(|f| BODY_FORMATS.contains(f))
}

fn own(root: &Path, kind: &str) -> Vec<OwnRef> {
    let ns = crate::design::project::mod_id(root).unwrap_or_else(|| yog_ids::ns::MINECRAFT.into());
    let mut out = Vec::new();
    let tag_of = format!("{}{}", yog_ids::typed::TAG, yog_ids::sep::NAMESPACE);
    if let Some(of) = kind.strip_prefix(tag_of.as_str()) {
        for d in defs(root, yog_ids::kind::TAG) {
            if d.value
                .get(yog_ids::content_field::OF)
                .and_then(Value::as_str)
                == Some(of)
            {
                out.push(OwnRef {
                    id: d.id,
                    file: d.file,
                });
            }
        }
        return out;
    }
    // Files named by their path: body files under content/, resources under resources/.
    let by_path = body_format(kind)
        .map(|f| (yog_ids::project::CONTENT, f))
        .or_else(|| {
            RESOURCE_KINDS
                .iter()
                .find(|(k, _)| *k == kind)
                .map(|(_, f)| (yog_ids::project::RESOURCES, *f))
        });
    if let Some((dir, format)) = by_path {
        let dir = root.join(dir);
        for f in crate::files::of(&dir, format) {
            let rel = f.strip_prefix(&dir).unwrap_or(&f).with_extension("");
            out.push(OwnRef {
                id: yog_ids::join(
                    &ns,
                    &rel.to_string_lossy().replace('\\', yog_ids::sep::PATH),
                ),
                file: f.to_string_lossy().into_owned(),
            });
        }
        return out;
    }
    if let Some((_, exts)) = FILE_KINDS.iter().find(|(k, _)| *k == kind) {
        for format in *exts {
            for f in files(root, *format) {
                let given = read(&f).and_then(|d| {
                    d.get(yog_ids::content_field::ID)
                        .and_then(Value::as_str)
                        .map(str::to_string)
                });
                let id = given.unwrap_or_else(|| {
                    f.file_stem()
                        .unwrap_or_default()
                        .to_string_lossy()
                        .into_owned()
                });
                out.push(OwnRef {
                    id: yog_ids::qualify_in(&ns, &id),
                    file: f.to_string_lossy().into_owned(),
                });
            }
        }
    } else {
        out = defs(root, kind)
            .into_iter()
            .map(|d| OwnRef {
                id: d.id,
                file: d.file,
            })
            .collect();
    }
    out.sort_by(|a, b| a.id.cmp(&b.id));
    out.dedup_by(|a, b| a.id == b.id);
    out
}

/// The mod's `.ydef`s of `kind`, in file order.
fn defs(root: &Path, kind: &str) -> Vec<OwnDef> {
    let ns = crate::design::project::mod_id(root).unwrap_or_else(|| yog_ids::ns::MINECRAFT.into());
    let mut out = Vec::new();
    for f in files(root, Format::Def) {
        let Some(doc) = read(&f) else { continue };
        if doc
            .get(yog_ids::content_field::KIND)
            .and_then(Value::as_str)
            != Some(kind)
        {
            continue;
        }
        let Some(id) = doc.get(yog_ids::content_field::ID).and_then(Value::as_str) else {
            continue;
        };
        out.push(OwnDef {
            id: yog_ids::qualify_in(&ns, id),
            file: f.to_string_lossy().into_owned(),
            value: doc,
        });
    }
    out
}

/// The mod's `.ydef`s of `kind` beside the file at `file`.
pub fn own_defs(file: &Path, kind: &str) -> Vec<OwnDef> {
    mod_root(file).map(|r| defs(&r, kind)).unwrap_or_default()
}

fn external(root: &Path, kind: &str) -> Vec<String> {
    let Some(kind) = crate::content::refs::RefKind::from_word(kind) else {
        return Vec::new();
    };
    let Ok(manifest) = crate::manifest::YogToml::read(&project::path(root)) else {
        return Vec::new();
    };
    let mut out = Vec::new();
    for external in &manifest.externals {
        for (_, ids) in external.ids.iter().filter(|(k, _)| *k == kind) {
            out.extend(
                ids.iter()
                    .map(|id| yog_ids::qualify_in(&external.namespace, id)),
            );
        }
    }
    out
}

/// The game's ids of `kind`, from the client jar (cached per jar).
fn game(root: Option<&Path>, kind: &str) -> Vec<String> {
    let tag_of = format!("{}{}", yog_ids::typed::TAG, yog_ids::sep::NAMESPACE);
    let tags = kind
        .strip_prefix(tag_of.as_str())
        .filter(|of| GAME_TAG_KINDS.contains(of))
        .map(yog_ids::registry_dirs);
    let how = GAME_IDS.iter().find(|(k, _)| *k == kind).map(|(_, h)| h);
    if tags.is_none() && how.is_none() {
        return Vec::new();
    }
    let Some(vanilla) = Resources::for_mod(root).vanilla else {
        return Vec::new();
    };
    type Cache = Mutex<HashMap<(PathBuf, String), Vec<String>>>;
    static CACHE: OnceLock<Cache> = OnceLock::new();
    let key = (vanilla.jar.clone(), kind.to_string());
    if let Some(hit) = CACHE
        .get_or_init(Default::default)
        .lock()
        .get(&key)
        .cloned()
    {
        return hit;
    }
    let mut out: Vec<String> = match (tags, how) {
        (Some(dirs), _) => data_ids(
            &vanilla,
            dirs.iter()
                .map(|d| format!("{}/{d}", yog_ids::pack::TAGS))
                .collect(),
        ),
        (None, None) => Vec::new(),
        (None, Some(GameIds::Lang { kinds, dotted })) => {
            let prefixes = kinds
                .iter()
                .map(|k| yog_ids::lang_prefix(k, yog_ids::ns::MINECRAFT))
                .collect();
            lang_ids(&vanilla, kind, prefixes, *dotted)
        }
        (None, Some(GameIds::LangPrefix(prefix))) => {
            lang_ids(&vanilla, kind, vec![prefix.to_string()], true)
        }
        (None, Some(GameIds::Data)) => data_ids(&vanilla, yog_ids::registry_dirs(kind)),
        (None, Some(GameIds::Keys(asset))) => {
            asset_keys(&vanilla, &format!("{}/{asset}", yog_ids::ns::MINECRAFT))
                .keys()
                .map(|k| game_id(k))
                .collect()
        }
    };
    out.sort();
    out.dedup();
    CACHE
        .get_or_init(Default::default)
        .lock()
        .insert(key, out.clone());
    out
}

/// `path` as the game's id.
fn game_id(path: &str) -> String {
    yog_ids::join(yog_ids::ns::MINECRAFT, path)
}

/// The keys of the jar's JSON asset `asset` (the first of the jar's copies that reads).
fn asset_keys(vanilla: &Vanilla, asset: &str) -> serde_json::Map<String, serde_json::Value> {
    vanilla
        .read_all(asset)
        .into_iter()
        .find_map(|b| serde_json::from_slice::<serde_json::Map<String, serde_json::Value>>(&b).ok())
        .unwrap_or_default()
}

/// The `.json` files under the game's `data/minecraft/<dir>/`, as ids.
fn data_ids(vanilla: &Vanilla, dirs: Vec<String>) -> Vec<String> {
    dirs.iter()
        .flat_map(|d| {
            vanilla.names_under(&format!(
                "{}/{}/{d}/",
                yog_ids::pack::DATA,
                yog_ids::ns::MINECRAFT
            ))
        })
        .filter_map(|n| n.strip_suffix(yog_ids::res::JSON).map(game_id))
        .collect()
}

/// The ids the game's lang keys under `prefixes` name (`dotted`: the rest
/// may hold dots); for items, a potion's key is Yog's alias of it.
fn lang_ids(vanilla: &Vanilla, kind: &str, prefixes: Vec<String>, dotted: bool) -> Vec<String> {
    let lang = format!(
        "{}/{}",
        yog_ids::ns::MINECRAFT,
        yog_ids::lang_file(yog_ids::game::LOCALE)
    );
    asset_keys(vanilla, &lang)
        .keys()
        .filter_map(|k| prefixes.iter().find_map(|p| k.strip_prefix(p.as_str())))
        .filter(|rest| rest.starts_with(POTION_LANG_PREFIX) || dotted || !rest.contains('.'))
        .map(|rest| {
            match rest
                .strip_prefix(POTION_LANG_PREFIX)
                .filter(|_| kind == yog_ids::kind::ITEM)
            {
                // `item.minecraft.potion.effect.swiftness` → `yog:potion/swiftness`.
                Some(name) => format!("{}{name}", yog_ids::yog::POTION_ALIAS),
                None => game_id(rest),
            }
        })
        .collect()
}

/// The game's kinds of block (`kind: "stairs"` on a `.yblock`): their
/// names, texture slots, the `block` fields they take and their defaults —
/// as `yog-formats` has them.
pub fn block_kinds() -> Value {
    use yog_data::Schema;
    Value::List(
        yog_formats::content::BlockKind::built_ins()
            .iter()
            .map(Schema::write)
            .collect(),
    )
}

#[cfg(test)]
mod tests {
    use super::*;

    fn write(root: &Path, rel: &str, text: &str) {
        let p = root.join(rel);
        std::fs::create_dir_all(p.parent().unwrap()).unwrap();
        std::fs::write(p, text).unwrap();
    }

    #[test]
    fn a_mods_own_content_external_ids_and_defs() {
        let dir = std::env::temp_dir().join(format!("yog-idle-refs-{}", std::process::id()));
        let _ = std::fs::remove_dir_all(&dir);
        write(
            &dir,
            "yog.toml",
            "[mod]\nid = \"mymod\"\n\n[external.create]\nentities = [\"seat\"]\n",
        );
        write(&dir, "content/items/wand.yitem", "{ name: \"Wand\" }");
        write(
            &dir,
            "content/items/potion.yitem",
            "{ item: { potion: { effects: [] } } }",
        );
        write(
            &dir,
            "content/blocks/lamp.yblock",
            "// a lamp\n{ id: \"glow_lamp\" }",
        );
        write(
            &dir,
            "content/mobs/wisp.yentity",
            "{ kind: \"mob\", width: 0.5, height: 0.5 }",
        );
        write(
            &dir,
            "content/body/wisp.ymodel",
            "{ texture: \"\", bones: [] }",
        );
        write(
            &dir,
            "content/fx/glow.ydef",
            "{ kind: \"effect\", id: \"glow\", category: \"beneficial\", color: 255 }",
        );
        write(
            &dir,
            "content/fx/dim.ydef",
            "{ kind: \"attribute\", id: \"dim\", default: 1, min: 0, max: 2 }",
        );
        write(
            &dir,
            "content/tags/plants.ydef",
            "{ kind: \"tag\", of: \"block\", id: \"plants\", values: [] }",
        );
        let probe = dir.join("content/items/wand.yitem");
        let ids = |kind: &str| {
            refs(&probe, kind)
                .own
                .into_iter()
                .map(|r| r.id)
                .collect::<Vec<_>>()
        };
        assert_eq!(
            ids("item"),
            ["mymod:glow_lamp", "mymod:potion", "mymod:wand"],
            "items include potion-only .yitems and a block's item form"
        );
        assert_eq!(ids("block"), ["mymod:glow_lamp"]);
        assert_eq!(ids("entity"), ["mymod:wisp"]);
        assert_eq!(ids("ymodel"), ["mymod:body/wisp"]);
        assert_eq!(ids("effect"), ["mymod:glow"]);
        assert_eq!(refs(&probe, "entity").external, ["create:seat"]);
        assert_eq!(ids("tag:block"), ["mymod:plants"]);
        assert!(ids("tag:item").is_empty());
        let effects = own_defs(&probe, "effect");
        assert_eq!(effects.len(), 1);
        assert_eq!(effects[0].value.get("color"), Some(&Value::Int(255)));
        std::fs::remove_dir_all(&dir).unwrap();
    }

    #[test]
    fn the_games_block_kinds_are_listed() {
        let kinds = block_kinds();
        let names: Vec<&str> = kinds
            .as_list()
            .unwrap()
            .iter()
            .filter_map(|k| k.get("name").and_then(Value::as_str))
            .collect();
        assert!(
            names.contains(&"stairs") && names.contains(&"pressure_plate"),
            "{names:?}"
        );
    }
}