# Canalhandia

Chat-only social features for the Canalhandia Minecraft server (Paper 26.2).

**Almost nothing here touches gameplay** — no world edits, no attributes, no
economy, and no items anywhere except one: the `luto` tribute. Pressing F to pay
respects drops the dead player's head into the mourner's inventory as a symbolic
memento (toggle: `luto.cabeca`). Everything else is chat messages and clickable
buttons, and every module can be switched off independently. (The reaction-count
boss bar was removed; live counts ride on the reactor's action bar and a closing
tally line.)

All player-facing text is Portuguese (pt-BR).

---

## Modules

| Module | What it does |
|---|---|
| `curiosidades` | *"Sabia que o Fulano já minerou 5.966 blocos de Pedra?"* — a fact about a player, with reaction buttons. Fires on join by default. |
| `adivinha` | The same fact with the name hidden, plus clickable player names. Reveals after 45s and names who guessed right. |
| `luto` | A clickable `[F]` under each death message, with a count when the window closes. Pressing F drops the **dead player's head** into the mourner's inventory (once per mourner per death, never to the dead player themselves) — the one gameplay-touching feature; toggle with `luto.cabeca`. Bedrock types `/f`. |
| `enquete` | `/enquete Pergunta \| A \| B` — clickable voting with a live tally on the boss bar. |
| `ranking` | `/ranking mineracao` and friends. Covers **offline players too**. |
| `marcos` | Announces round milestones — 100 km walked, 24 hours played — the first time someone crosses one. |
| `mortes` | Replaces each death message with a comic pt-BR line (cause-based flavor + a death counter) and sends the death coordinates **privately** to the dead player on respawn (the death screen swallows chat sent during the event), so they can run back to their dropped items. Respects `keepInventory`. No storage, no command. |
| `ia` | `/ia <pergunta>` asks an OpenAI-compatible model in chat. Optional wiki grounding, per-player memory, operator corrections. |

Toggle any of them: `/canalhandia modulo <nome> <on|off>`

---

## Where the data comes from

Everything is derived from **vanilla statistics**. No database, no tracking code,
no extra writes — the server was already recording all of it.

- **Online players** use the Bukkit API (`Player#getStatistic`).
- **Rankings** read `<world>/players/stats/<uuid>.json` directly, because Bukkit
  only exposes statistics for players who are online. `usercache.json` maps those
  UUIDs back to names, including Floodgate/Bedrock players whose UUIDs start with
  `00000000-0000-0000-0009`.

Note the path: Paper writes to `<world>/players/stats`, **not** `<world>/stats`.
`OfflineStats` checks both.

---

## Two constraints worth knowing

These shaped the design, and anyone changing the code should know them before
"fixing" what looks odd.

### 1. Chat messages cannot be edited after sending

There is no vanilla way to update a message that is already in the chat log. So
the counts baked into the reaction buttons are **frozen at send time** and never
change. The live numbers appear on two other surfaces instead:

- an **action bar** shown to whoever just reacted
- a **final tally line** broadcast when the window closes

(A boss bar spanning the whole reaction window was tried and removed — it sat
on screen for `janela-reacao-segundos` and read as clutter, and the two
surfaces above already carry the counts.)

### 2. Who reacted, without filling the screen

Naming every reactor on its own chat line does not scale — five people
reacting to five reactions is a wall of text. So the names live in three
progressively larger places:

- **hover tooltip** on each button (Java only — Bedrock cannot hover)
- **one-line closing summary** naming the first `resumo-nomes` (default 3) and
  collapsing the rest into `+N`
- **`/reacoes`** for the full breakdown, sent privately so chat stays clean

The same cap applies to the mourning line, so a popular death is still one line.

Relatedly, a curiosity costs **one** chat message, not two — the button row is
appended to the headline rather than broadcast separately.

And automatic curiosities are rate-limited by `intervalo-minimo-segundos`
(default 120). Without it, five people joining together produced five
curiosities back to back. A typed `/curiosidade` bypasses the limit.

### 3. Clicks arrive late

People scroll back and click minutes after a message. Reactions therefore keep
counting for `reacao-validade-minutos` (default 15) even after the boss bar is
gone, and the last 8 reaction sets stay in memory for that reason. Silently
dropping a late click looks like a bug to the player.

### 4. Bedrock cannot click, and cannot show emoji

Geyser cannot deliver a chat `clickEvent` to a Bedrock client, and most emoji
render as tofu boxes there. So every clickable interaction has a typed
equivalent, and every reaction carries two labels:

```yaml
reacoes:
  uau:
    java: "[😮]"     # Java clients
    texto: "[UAU]"   # Bedrock clients — ASCII only
    comando: "wow"   # what a Bedrock player types
```

Messages with buttons are therefore built twice and sent per player
(`broadcastPerPlatform`), not via `Bukkit.broadcast`. Typed fallbacks:
`/reagir <chave>`, `/legal`, `/wow`, `/top`, `/f`, `/palpite <nome>`,
`/votar <número>` — all of which act on the most recent message, so the player
never needs a message id.

Changing a `comando` to a new name also requires adding that command to
`plugin.yml` and restarting; Bukkit commands are static.

**Detecting Bedrock**: Floodgate mints UUIDs whose high 64 bits are zero
(`00000000-0000-0000-0009-…`), so `Platform.isBedrock` checks
`getUniqueId().getMostSignificantBits() == 0`. That keeps Floodgate an optional
runtime dependency rather than a compile-time one. `/canalhandia plataformas`
lists who is online and on which platform.

### 5. Names are translated by the client, not by us

Block, item and mob names are emitted as **translatable components**
(`Component.translatable(material.translationKey())`), so a pt-BR client renders
"Pedra" and an en-US client renders "Stone" from the same broadcast. There is no
translation table to maintain.

The consequence: the client only supplies the **singular** form. Every sentence
is therefore phrased so the number never has to agree with the noun —
*"5.966 blocos de Pedra"*, never *"5.966 Pedras"*. Keep that rule when adding
sentences to `CuriosityFactory`.

Note that the **server console** renders translatable components in English, so
`[Curiosidade] ... 16 unidades de Copper Pickaxe` in `latest.log` does not mean
players saw English.

---

## Commands

Player-facing:

```
/curiosidade                       anuncia uma curiosidade agora
/curiosidade <jogador>             anuncia sobre alguém específico
/curiosidade ver [jogador]         mostra só para você
/curiosidade listar [jogador]      lista todas as curiosidades disponíveis
/curiosidade toggle                entra/sai do sorteio
/adivinha                          inicia uma rodada de "adivinhe de quem é"
/enquete Pergunta | A | B          abre uma enquete
/enquete encerrar                  encerra a enquete aberta
/ranking [categoria]               placares do servidor
/canalhandia status                mostra toda a configuração
/canalhandia modulos               lista os módulos e seu estado
```

Admin (`canalhandia.admin`):

```
/canalhandia modulo <nome> <on|off>       liga/desliga um módulo
/canalhandia marcos                       força uma verificação de marcos
/canalhandia limpar [cooldown|historico|tudo]
/canalhandia reload
/curiosidade modo <entrada|intervalo|ambos|manual>
/curiosidade intervalo <min>              intervalo do modo temporizado
/curiosidade atraso <seg>                 espera após o jogador entrar
/curiosidade cooldown <min>               mínimo entre citar o mesmo jogador
/curiosidade repetir <n>                  quantas recentes evitar repetir
/curiosidade janela <seg>                 duração da barra de reações
/curiosidade validade <min>               por quanto tempo cliques ainda contam
/curiosidade reacoes <on|off>
/curiosidade reacao add <chave> <rótulo>
/curiosidade reacao remover <chave>
/curiosidade categoria <nome> <on|off>
```

Every setter **writes through to `config.yml` immediately**, so in-game changes
survive a restart.

### Permissions

| Permission | Default | Grants |
|---|---|---|
| `canalhandia.reagir` | everyone | react, press F |
| `canalhandia.ver` | everyone | `ver`, `listar`, `/ranking` |
| `canalhandia.enquete` | everyone | open polls |
| `canalhandia.forcar` | op | trigger curiosities and guess rounds |
| `canalhandia.admin` | op | change modules and all settings |
| `canalhandia.isento` | nobody | never be the subject |
| `canalhandia.ia` | op | `/ia` (public question, broadcast to chat) |
| `canalhandia.ia.privado` | op | `/iap` (private question, answer only to the asker) |
| `canalhandia.ia.corrigir` | op | `/ia corrigir <resposta>` — register a correction for the last answer |
| `canalhandia.ia.perfil` | op | `/ia perfil <economico\|preciso>` — switch profile live |

Permissions are **declared explicitly** in `plugin.yml`. An undeclared Bukkit
permission falls back to op-only, which would silently stop normal players from
reacting.

---

## IA (`/ia`)

Chat Q&A backed by an OpenAI-compatible endpoint (default MiniMax). Gated to
operator + LuckPerms-permitted players; both `/ia` and `/iap` default to op and
are granted independently, so an operator can let someone ask privately without
letting them broadcast.

**The model can only ever produce chat text.** No tool/function definitions are
sent in the request, the reply is passed to `sendMessage` and nowhere else, and
`AiText.sanitise` strips leading slashes so a reply cannot be mistaken for a
command. A player asking it to "run `/op me`" gets a string back, not an
executed command.

### Commands

| Command | What it does |
|---|---|
| `/ia <pergunta>` | Asks the model. Public by default — the question and answer broadcast. Needs `canalhandia.ia`. |
| `/iap <pergunta>` | Asks privately — the answer goes only to the asker. Needs `canalhandia.ia.privado`. |
| `/ia perfil <economico\|preciso>` | Switches profile live. `ECONOMICO` skips the wiki (fast); `PRECISO` consults the Minecraft Wiki (slower, grounded). Needs `canalhandia.ia.perfil`. |
| `/ia corrigir <resposta correta>` | Records a correction for the last answered question. Future similar questions get it as context — the cheap alternative to fine-tuning. Needs `canalhandia.ia.corrigir`. |
| `/ia feedback ruim` | Flags the last answer wrong (in-memory counter shown in `/canalhandia status`). |
| `/errado` | The `[ERRADO]` reaction to the last message — the typed-twin of the reaction button, for Bedrock players. |

Subcommands only hijack when their second token is one they act on (a known
profile key, or `ruim`), so `/ia perfil do servidor` falls through and is asked.
`corrigir` stays greedy — a correction always reads the rest of the line.

### Profile

`ECONOMICO` skips the wiki round trip — fast, ungrounded. `PRECISO` runs a
forced tool call to pick a wiki term, looks it up on pt.minecraft.wiki, and
injects the article as context. Switch live with `/ia perfil`; the choice is
read per-question, so it takes effect immediately.

### Operator corrections

`/ia corrigir <resposta>` appends to `plugins/Canalhandia/correcoes.yml`. When a
new question shares at least one significant word (length > 4) with a recorded
correction, the correction is injected as system context. Pure string matching,
no model round trip.

### Memory and context

- **Per-player memory**: the last `memoria-perguntas` exchanges within
  `memoria-minutos` are replayed, for follow-ups like "e no nether?". Forgotten
  on quit. Baked at construction; not hot-swappable.
- **Server context**: the `contexto:` list in `config.yml` is facts the model
  would never know (server name, Bedrock prefix, installed mods). Sent on every
  question.
- **Asker's stats**: when `estatisticas-jogador` is on (default), the asking
  player's headline numbers (blocks mined, time played, distance walked, deaths,
  mob kills) are read from their vanilla stats JSON and injected as context, so
  "quantos blocos eu minerei?" gets a real answer instead of "não tenho
  acesso". The stats file lags by under a minute. Gated off with
  `/canalhandia` settings or `ia.estatisticas-jogador: false`.
- **Recipes**: `RecipeBook` snapshots `Bukkit.recipeIterator()` at enable (main
  thread) and answers recipe questions from that snapshot — `explaintext` drops
  tables, so the wiki cannot supply them.

### Keys and limits

The API key never lives in `config.yml` (committed to git). Read from the
`MINIMAX_API_KEY` env var, or `plugins/Canalhandia/minimax.key` (one line,
printable ASCII only — control chars are stripped so a stray newline can't
land the key in a server-log header exception).

Per-player cooldown (`cooldown-segundos`), a server-wide daily cap
(`limite-diario`), and a one-question-at-a-time guard per player keep the
token spend bounded. `canalhandia.admin` skips the cooldown.

The four values `url`, `wiki-caracteres`, `memoria-perguntas` and
`memoria-minutos` are baked at construction. Everything else — `modelo`,
`max-tokens`, `temperatura`, `instrucoes`, `perfil`, `contexto`, the limits —
is read live, so operators can hot-swap them with `/canalhandia reload` or the
`/ia perfil` command without a restart.

---

## Building

Requires **JDK 25**. Paper 26.2's API ships Java 25 class files, and JDK 21 fails
with a misleading `cannot access org.bukkit.Bukkit` — that phrasing means the
class-file version is too new, not that the dependency is missing.

```bash
docker run --rm -v "$PWD":/work -v "$HOME/.m2":/root/.m2 -w /work \
  maven:3.9-eclipse-temurin-25 mvn -B package
```

Output: `target/Canalhandia-1.0.0.jar`

The dependency uses Paper's newer coordinate scheme:
`io.papermc.paper:paper-api:26.2.build.92-stable`.

### Deploying

Copy the jar into the server's `plugins/` and restart. There is no hot-reload
path for a new jar — `/canalhandia reload` only re-reads `config.yml`.

```bash
POD=$(microk8s kubectl get pod -n minecraft -l app=crafty-controller -o name | head -1)
SRV=/crafty/servers/6e39a8b2-300b-42d6-8139-f397c23e461b
microk8s kubectl cp target/Canalhandia-1.0.0.jar minecraft/${POD#pod/}:$SRV/plugins/Canalhandia-1.0.0.jar
```

---

## Source layout

| File | Role |
|---|---|
| `Canalhandia.java` | Plugin entry point, scheduling, broadcasting, listeners |
| `CanalhandiaCommand.java` | Every command and all click callbacks |
| `Settings.java` | Typed config access; all setters persist immediately |
| `Module.java` / `Category.java` / `Mode.java` | Toggleable feature, fact group, trigger mode |
| `CuriosityFactory.java` | Builds the Portuguese sentences from statistics |
| `Stats.java` | Defensive Bukkit statistics access |
| `Fact.java` | One sentence plus its category |
| `Reactions.java` | Reaction state, buttons, boss bar, tally |
| `GuessRound.java` | "Adivinhe de quem é" round state |
| `Poll.java` | Poll state, voting, results |
| `Milestones.java` | Threshold tracking, persisted to `marcos.yml` |
| `OfflineStats.java` | Reads stats JSON for offline players (rankings + the asker's stat summary for the IA) |
| `RankingMetric.java` | Leaderboard columns and their formatting |
| `DeathFlavor.java` | Comic pt-BR verb phrases for each death cause (used by the `mortes` module) |
| `Msg.java` | Shared chat formatting and pt-BR number/duration formatting |

### Adding a curiosity

Add one line to `CuriosityFactory.facts(...)` using the existing helpers
(`material`, `entities`, `distance`, `time`, `count`), pick a `Category`, and
phrase it so the count never has to agree with a translated noun.

Statistic constants get renamed between Minecraft releases, so resolve them via
`Stats.resolve("NEW_NAME", "OLD_NAME")` — a rename then degrades one curiosity
instead of breaking the whole announcement.