# ClassicAPI Adoption Backlog

Opportunities to use [ClassicAPI](https://github.com/brues-code/ClassicAPI)
(`C:\Git\ClassicAPI`, see `docs/API.md`) in SuperCleveRoidMacros. ClassicAPI is
a client mod (sibling to nampower/SuperWoW) that backports the modern `C_*` API
into the 1.12.1 client.

**Policy: ClassicAPI is a hard requirement of this fork — no fallbacks.** The
load-time requirement check warns when it's missing (`Core.lua`), the same as
nampower/UnitXP. ClassicAPI-backed code may assume the API is present (light
`pcall`/nil guards for runtime safety are fine, but do not maintain alternate
non-ClassicAPI implementations). Users who don't want ClassicAPI should run the
upstream addon instead.

API references are line numbers into `C:\Git\ClassicAPI\docs\API.md`.

---

## Tier 1 — high impact (new capabilities, not just refactors)

### 1. `C_UnitAuras` — native aura data for any unit
- **API:** `API.md:8670` — `GetAuraDataBySpellName(unit, name, filter)`,
  `GetUnitAuraBySpellID(unit, spellID, filter)`, `GetAuraDataByIndex`.
- Returns `spellId`, `dispelName` (`"Magic"`/`"Curse"`/`"Disease"`/`"Poison"`),
  `applications` (stacks), `duration`.
- **Unlocks:** `[dispellable]` / `[curse]` / `[magic]` target conditionals and
  spellID-based (rank/locale-proof) aura matching.
- **~~Caveat: `expirationTime` is player-only~~ — NO LONGER TRUE.** This note said
  target/focus `expirationTime` was always `0`, so debuff *timers* had to stay on
  libdebuff. ClassicAPI has since added the `Aura::Source` cache: for a non-player
  unit `expirationTime` is reconstructed from the observed `SMSG_SPELL_GO`, and
  `duration` is the **caster-modified** value (talent extensions like Improved
  Shadow Word: Pain included). It also handles combo-point finisher scaling
  automatically (Rupture at 4 CP reads 14s, no registration) and ships Carnage's
  roll-gated Rip/Rake refresh in the DLL (`src/turtle/Carnage.cpp`, exposed as
  `RegisterAuraDurationModifierByTrigger`).
- **Real remaining caveats** (all best-effort, from `docs/API.md`):
  - Only auras observed *after login* carry caster/timing; older ones report
    `expirationTime` 0 and `sourceUnit` nil.
  - Max-stack refresh is a blind spot: re-applying at max stacks (Shadow Weaving
    5→5) emits no client-visible change, so the entry elapses and evicts.
  - Out-of-range group members are spell-ID only, with `applications` always 1.
- **Consequence:** most of libdebuff is now redundant — see
  "libdebuff retirement" below.

- **DONE (slice 1 — dispel-type conditionals):** added `ClassicAPI.lua`
  detection module (`CleveRoids.ClassicAPI`, mirrors NampowerAPI's
  `HasMinimumVersion`) and the `[magic]`/`[curse]`/`[disease]`/`[poison]`/
  `[dispellable]` conditionals + negations, backed by
  `C_UnitAuras.GetDebuffDataByIndex(...).dispelName`. No-arg booleans, honor
  `@unit`, graceful fallback (positive→false, negated→true) when ClassicAPI is
  absent. Purely additive — the existing `ValidateAura` path is untouched.
- **DONE (slice 2 — buff-side / offensive dispel):** `UnitHasDispelType` now
  takes a `helpful` flag (scans `GetBuffDataByIndex`), exposed as
  `[magicbuff]`/`[dispellablebuff]` + negations — detect a dispellable buff to
  strip off an enemy (e.g. `[harm,magicbuff] Dispel Magic`). Magic-only is the
  practical set since 1.12 offensive dispel removes Magic buffs.
- **Follow-ups (still TODO):**
  - spellID-based aura matching via `GetUnitAuraBySpellID` (rank/locale-proof),
    optionally wired into `ValidateAura` as a fast path with libdebuff fallback.
  - more reliable cross-unit stacks via `applications`.
  - class-aware `[dispellable]` (only types this character can actually remove).
  - optional name filtering on the type keywords (e.g. `[magic:Polymorph]`).

### 2. ~~`C_Item.GetWeaponEnchantInfo()` — temp-enchant IDs~~ — DONE
- Shipped as `[mhenchant]` / `[ohenchant]` (+ `no` variants). Matches the applied
  temp enchant by SpellItemEnchantment ID *or* localized name — the name path
  resolves via `C_Item.GetEnchantInfo(id).name` (the ID→name table this doc
  assumed we lacked), so no tooltip scan. Wrappers `ClassicAPI.GetWeaponEnchant`
  / `GetEnchantName`; `ValidateWeaponImbue` now reads through the former.
- Bare = any temp enchant; OR-lists supported (`[mhenchant:2823/Deadly_Poison]`).
- Follow-up (optional): route `[mhimbue:Name]`'s match through `GetEnchantName`
  too, retiring the green-text tooltip scan in `CheckWeaponImbueByName`.

### 3. `GetUnitSpeed(unit)` + `IsFalling()` / `IsSwimming()`
- **API:** `API.md:8312`, `API.md:7629`.
- **Replaces today:** MonkeySpeed addon dependency (which needs SuperWoW
  `UnitPosition`) for `[moving]` — `Conditionals.lua:2981`.

- **DONE:** `ClassicAPI.lua` exposes `HasUnitSpeed` / `GetUnitCurrentSpeed` /
  `GetPlayerSpeedPercent` (100% = 7.0 yd/s) plus `IsPlayerFalling` (`IsFalling`).
  `GetPlayerSpeed` and `IsPlayerMoving` are ClassicAPI-only now; the boolean
  `[moving]` ORs in `IsPlayerFalling` so jumping/falling registers even though
  `currentSpeed` is horizontal-only.
- **Fallbacks removed (ClassicAPI mandatory):** deleted the MonkeySpeed
  integration (`HasMonkeySpeed`, `RequireMonkeySpeed`), the Nampower
  `PlayerIsMoving` branch, and the 100 Hz position-tracking buffer in Core.lua's
  OnUpdate (`_positionHistory`, `POS_TRACK_INTERVAL`, `UnitPosition` upvalue).
  MonkeySpeed dropped from README "Supported Addons".
- **`IsSwimming` deliberately not used:** swim state is true while treading
  water motionless, which would falsely report `[moving]`.

---

## Tier 2 — replace custom scanning / extra deps

### `GetActionInfo(slot)` — action-slot → spell/macro/item mapping
- **API:** `API.md:489` — returns `actionType, id, subType`.
- **DONE:** `ClassicAPI.GetActionInfo` wrapper added; `GetActionButtonInfo`
  (`Extensions/Tooltip/Generic.lua`) rewritten to use it and resolve names via
  `GetSpellRecField` / `GetItem` / `GetMacroInfo`, replacing the per-slot
  GameTooltip scan + texture heuristic (which couldn't tell spell from item and
  never recognized macros). Powers reactive-ability slot detection
  (`IndexActionSlot`). Deleted the dead SuperWoW-`GetActionText` copy of
  `GetActionButtonInfo` in `Conditionals.lua`.
- **Known limitation:** GetActionInfo returns `id = nil` for bag-instance items
  (items dragged from bags rather than placed by itemID), so those slots get no
  name. The consumers (`actionSlots` for `/startattack`·`/shoot`·auto-shot
  proxies, reactive spells) only need spells, so this is acceptable.
- **Follow-up (optional):** migrate the remaining `GetActionText` macro-slot
  detection in `Core.lua` / `ComboPointTracker.lua` to `GetActionInfo` too.

### 4. `C_Spell.*` / `GetSpellInfo(spellID)`
- **API:** `API.md:6649+` — `GetSpellCooldown`, `IsUsableSpell`, `IsSpellKnown`,
  `SpellHasRange`, `GetSpellSchool`, `FindSpellBookSlotByID`.
- **Replaces today:** spellbook scanning via `GetSpellName(i, BOOKTYPE_SPELL)`
  (`Conditionals.lua:2500`) and the Slam-slot hack. Simplifies `[known]`,
  `[usable]`, range checks.

### 5. `C_Timer.After` / `NewTicker` (+ coroutines)
- **API:** `API.md:8008+`.
- **Replaces today:** manual `OnUpdate` frames (`Core.lua:5082`, `:80`, `:460`)
  and the UnitXP aura-cleanup timer (`Conditionals.lua:1474`).

### 6. `UnitGUID` / `UnitTokenFromGUID`
- **API:** `API.md:8206+`.
- **Replaces today:** SuperWoW GUIDs in ComboPointTracker (`ComboPointTracker.lua`).
- **Verify first:** confirm GUID string format matches SuperWoW's before swapping.

### 7. Native `focus` token + `FocusUnit`/`ClearFocus` + `PLAYER_FOCUS_CHANGED`
- **API:** `API.md:2624+`.
- **Replaces today:** custom/pfUI focus resolution (`Conditionals.lua:5799`, `:3148`).
  Gives engine-backed `@focus` for non-pfUI users.

---

## Tier 3 — situational

- **`C_NamePlate.GetNamePlates()` / `nameplateN` tokens** (`API.md:5742+`) —
  alternative to UnitXP enemy enumeration for AoE counting (`Conditionals.lua:3099`).
- **`GetShapeshiftFormID()` + `UPDATE_SHAPESHIFT_FORM`** (`API.md:7792`) —
  cleaner stance/form conditionals.
- **`CastSpellNoToggle` / numeric spellIDs in `/cast`** (`API.md:5336+`) —
  rank-specific casting by ID, no-toggle behavior; could back a `/cast <spellID>`.
- **State helpers** `IsStealthed` / `IsMounted` / `UnitStandState` (`API.md:7574+`) —
  back simple `[stealth]` / `[mounted]` / `[standing]` conditionals.

---

## Cross-cutting policy

ClassicAPI is a **hard requirement** (see policy at the top) — ClassicAPI-backed
code calls the API directly, **no fallbacks**. Light `pcall`/nil guards for
runtime safety are fine; do not maintain alternate non-ClassicAPI
implementations. The load-time requirement check (`Core.lua`) warns when it's
missing, the same as nampower/UnitXP.

---

## Conditionals.lua audit — do NOT migrate (traps)

Findings from the full Conditionals.lua audit. These look like ClassicAPI
candidates but are **worse** than the current implementation — recorded so we
don't re-investigate.

- ~~**Auras / `ValidateAura`** — `C_UnitAuras.expirationTime` is player-only~~ —
  **STALE, do not trust this entry.** It was written before the `Aura::Source`
  cache landed. Non-player `expirationTime`/`duration` now work (caster-modified,
  talent extensions included), so this is no longer a reason to keep libdebuff's
  remote-duration tracking. See Tier 1 §1 and "libdebuff retirement" for the
  current picture and the real caveats. The nampower `GetUnitField` batch read is
  a separate question and has not been re-examined.
- **`GetCurrentShapeshiftIndex` form loop / `[stance]`·`[form]`** —
  `GetShapeshiftFormID()` returns the **DBC form id** (Cat=1, Bear=5,
  Shadowform=28…), NOT the 1-based **bar index** these conditionals compare
  against. Swapping would silently break every `[stance:N]`/`[form:N]` macro.
  (Only the Rogue *stealth* branch was migrated, via `IsStealthed`.)
- **Cast-time scans** (Slam-clip, `GetSpellCastTime`) — ClassicAPI/DBC cast time
  is **base only** (no haste/talents/buffs), which defeats the reason these scan
  the tooltip.
- **Range / distance / behind / facing** — UnitXP_SP3 gives precise yards +
  facing; `UnitInRange` is a binary 40yd and has no facing/behind. Keep UnitXP.
- **`FindItemLocation`** — nampower `FindPlayerItemSlot` finds an item by id/name
  across bags in one call; ClassicAPI has no equivalent (would need a manual
  `C_Container` bag scan). Keep nampower.
- **`[known]`** (name+rank+talent logic richer than `IsSpellKnown`/`IsPlayerSpell`'s
  current-rank/no-talent semantics) and **`[usable]`/reactive** (nampower
  `IsSpellUsable` == `IsUsableSpell`). Keep.

## Conditionals.lua audit — done

- `GetItemCooldownCached` → ClassicAPI `GetItemCooldown(item)` (slots 1-19 still
  inventory-based).
- `[stealth]`/`[nostealth]`/`[stl]`/`[nostl]` + Rogue branch of
  `GetCurrentShapeshiftIndex` → `IsStealthed()`.
- `CountEnemiesMatching` nameplate scan → `C_NamePlate.GetNamePlateGUIDs()`.
- Focus: `GetFocusUnitId`/`TryTargetFocus` use the native `"focus"` token;
  added `[focus]`/`[nofocus]`. `/focus` is provided by ClassicAPI's companion
  addon.

## libdebuff retirement

libdebuff exists because vanilla cannot report debuff durations on units other
than the player. ClassicAPI's `Aura::Source` cache now does exactly that, so most
of the library is redundant. This is a staged replacement, not a delete: measure
first, then remove per group.

Current footprint: 28 public `lib:` methods, ~726 internal references in
`Utility.lua`, consumers in 8 files (`Conditionals.lua` 45, `Compatibility/pfUI.lua`
39, `Core.lua` 9). Note pfUI did **not** delete its own libdebuff — v9.0.25 still
ships ~1695 lines of it, re-based on `C_UnitAuras.GetAuraDataByIndex` /
`GetAuraDataBySpellName`. "Re-base on C_UnitAuras", not "remove", is the precedent.

**Group A — replaceable by `C_UnitAuras` (do these first):**
`GetDuration`, `GetDebuffCaster`, `IsOurDebuff`, `UnitBuff`/`UnitDebuff`,
`FindPlayerDebuff`/`FindPlayerBuff`, `GetAllDebuffsOnTarget`, `GetCachedIcon`,
`ApplyCarnageRefresh`, and the Dark Harvest trio (`ApplyDarkHarvestStart`/`End`,
`GetDarkHarvestReduction`, `GetTimeRemainingWithDarkHarvest`) — ClassicAPI ships
Carnage refresh and Dark Harvest tick compression in the DLL.

**Group B — no `C_UnitAuras` equivalent, keep:**
`ShouldApplyDebuffRank`, `DidSpellFail`, `WasSpellReflected`, `DidTargetEvade`,
`ProcessMissReason`, `IsPersonalDebuff`, `GetSpellRank`/`GetSpellBaseName`,
`HasPendingCast`. These are miss/rank/learning logic, not aura state.

**Gate before removing Group A:** confirm parity in-game on one spell where
ClassicAPI does the hard part — Rip under Carnage. Compare
`CleveRoids.libdebuff:GetDuration(spellID)` against
`C_UnitAuras.GetUnitAuraBySpellID(unit, spellID).duration` and the derived
remaining (`expirationTime - GetTime()`), on a target you have debuffed. If those
agree across a Carnage proc, Group A can go. Watch the documented best-effort
gaps: an aura cast before you logged in, and refresh-at-max-stacks.

## Marginal / optional follow-ups

- **`[swimming]`** → `IsSwimming()` would drop the nampower-2.36 version gate +
  warning (same semantics). `[rooted]` has no ClassicAPI equivalent — keep nampower.
- **Weapon-imbue name match** (`[imbue:Mongoose]`) → `C_Item.GetWeaponEnchantInfo`
  gives enchant **IDs**, so it needs an enchantID→name table we don't ship.