// Combat.scenario.test.js
// Full combat scenario driven through shared/turn.js directly --- NO React.
//
// Does 100 ROUNDS (not turns). A round = one full pass through initiative
// (every active participant acts once); round counter increments at wrap.
// See docs/GLOSSARY.md. Previous version lied: called nextTurn 100× (~100
// turns, ~12 rounds). Now loops by actual round-wrap count.
//
// Exercises ALL combat paths deterministically (less random than replay):
//   startEncounter, nextTurn, togglePause, addParticipant, addParticipants,
//   updateParticipant, removeParticipant, toggleParticipantActive,
//   applyHpChange (damage/heal), deathSave (incl. 3-success → isDying),
//   toggleCondition, reorderParticipants (drag same-init tie), endEncounter,
//   activateDisplay, clearDisplay, toggleHidePlayerHp.
//
// Failing assertions do NOT abort the run: each phase wrapped in try/catch,
// failures collected, final expect reports all.

const {
  makeParticipant,
  buildCharacterParticipant,
  buildMonsterParticipant,
  startEncounter,
  nextTurn,
  togglePause,
  addParticipant,
  addParticipants,
  updateParticipant,
  removeParticipant,
  toggleParticipantActive,
  applyHpChange,
  deathSave,
  toggleCondition,
  reorderParticipants,
  endEncounter,
  activateDisplay,
  clearDisplay,
  toggleHidePlayerHp,
} = require('../../shared');

// aliases for combat funcs that clash with local helper names
const {
  applyHpChange: combatApplyHpChange,
  toggleParticipantActive: combatToggleActive,
  toggleCondition: combatToggleCondition,
  deathSave: combatDeathSave,
} = require('../../shared');

// ---------- scenario state (mirrors two firestore docs) ----------

const ROUNDS = 100;

// encounter doc
let enc = {
  name: 'BigBoss',
  participants: [],
  isStarted: false,
  isPaused: false,
  round: 0,
  currentTurnParticipantId: null,
  turnOrderIds: [],
};
// activeDisplay/status doc
let display = {
  activeCampaignId: null,
  activeEncounterId: null,
  hidePlayerHp: true,
  hideNpcHp: false,
};
const CAMPAIGN_ID = 'camp-1';
const ENCOUNTER_ID = 'enc-1';
const roster = [];

function applyEnc(patch) {
  if (!patch) return;
  for (const [k, v] of Object.entries(patch)) enc[k] = v;
}
function applyDisplay(patch) {
  if (!patch) return;
  for (const [k, v] of Object.entries(patch)) display[k] = v;
}

const RESULTS = [];
function record(phase, fn) {
  try { fn(); RESULTS.push({ phase, ok: true }); }
  catch (err) { RESULTS.push({ phase, ok: false, err: err.message }); }
}
async function recordAsync(phase, fn) {
  try { await fn(); RESULTS.push({ phase, ok: true }); }
  catch (err) { RESULTS.push({ phase, ok: false, err: err.message }); }
}

// ---------- helpers (shared, no React) ----------

const alive = (name) => enc.participants.find(p => p.name === name && p.currentHp > 0);
const any = (name) => enc.participants.find(p => p.name === name);
const idOf = (name) => { const p = any(name); return p ? p.id : null; };

function addCharacterViaUI(name, maxHp, initMod) {
  roster.push({ id: `char-${name}`, name, defaultMaxHp: maxHp, defaultInitMod: initMod });
}
function addMonsterParticipant(name, maxHp, initMod, isNpc = false) {
  const { participant } = buildMonsterParticipant({ name, maxHp, initMod, isNpc });
  applyEnc(addParticipant(enc, participant).patch);
}
function addCharacterParticipant(charName) {
  const character = roster.find(c => c.name === charName);
  if (!character) throw new Error(`char not found: ${charName}`);
  if (enc.participants.some(p => p.type === 'character' && p.originalCharacterId === character.id)) {
    throw new Error(`${charName} already in encounter`);
  }
  const { participant } = buildCharacterParticipant(character);
  applyEnc(addParticipant(enc, participant).patch);
}
function addAllCharacters() {
  const toAdd = roster
    .filter(c => !enc.participants.some(p => p.type === 'character' && p.originalCharacterId === c.id))
    .map(c => buildCharacterParticipant(c).participant);
  applyEnc(addParticipants(enc, toAdd).patch);
}
function startCombat() {
  applyEnc(startEncounter(enc).patch);
  applyDisplay(activateDisplay({ campaignId: CAMPAIGN_ID, encounterId: ENCOUNTER_ID }).patch);
}
function endCombat() {
  applyEnc(endEncounter(enc).patch);
  applyDisplay(clearDisplay().patch);
}
function nextTurnAction() { applyEnc(nextTurn(enc).patch); }
function pauseCombat() { applyEnc(togglePause(enc).patch); if (!enc.isPaused) throw new Error('not paused'); }
function resumeCombat() { applyEnc(togglePause(enc).patch); if (enc.isPaused) throw new Error('not resumed'); }

function applyDamage(name, amount) {
  const p = any(name);
  if (!p || p.currentHp <= 0) return; // dead = skip (button hidden in UI)
  applyEnc(combatApplyHpChange(enc, p.id, 'damage', amount).patch);
}
function applyHeal(name, amount) {
  const p = any(name);
  if (!p) return; // removed (death) = skip (no button in UI)
  applyEnc(combatApplyHpChange(enc, p.id, 'heal', amount).patch);
}
function toggleActive(name) {
  const p = any(name);
  if (!p) throw new Error(`no active target: ${name}`);
  applyEnc(combatToggleActive(enc, p.id).patch);
}
function toggleConditionAction(name, label) {
  const p = any(name);
  if (!p) throw new Error(`no condition target: ${name}`);
  applyEnc(combatToggleCondition(enc, p.id, label).patch);
}
function editParticipant(name, patch) {
  const p = any(name);
  if (!p) throw new Error(`no edit target: ${name}`);
  applyEnc(updateParticipant(enc, p.id, patch).patch);
}
function removeParticipantByName(name) {
  const p = any(name);
  if (!p) throw new Error(`no remove target: ${name}`);
  applyEnc(removeParticipant(enc, p.id).patch);
}
function deathSaveAction(name, type, saveNum) {
  const p = any(name);
  if (!p) throw new Error(`no deathsave target: ${name}`);
  applyEnc(combatDeathSave(enc, p.id, type, saveNum).patch);
}
function dragTie(draggedName, targetName) {
  const d = any(draggedName), t = any(targetName);
  if (!d || !t) throw new Error('drag target missing');
  applyEnc(reorderParticipants(enc, d.id, t.id).patch);
}
function toggleHidePlayerHpAction() {
  applyDisplay(toggleHidePlayerHp(display.hidePlayerHp).patch);
}

// ---------- scenario ----------

test('full 100-round combat scenario (shared, no React)', async () => {
  // roster
  await recordAsync('addChar Fighter', () => addCharacterViaUI('Fighter', 30, 2));
  await recordAsync('addChar Cleric', () => addCharacterViaUI('Cleric', 24, 1));
  await recordAsync('addChar Rogue', () => addCharacterViaUI('Rogue', 22, 3));

  // monsters + npcs
  await recordAsync('addMonster Goblin1', () => addMonsterParticipant('Goblin1', 8, 2));
  await recordAsync('addMonster Goblin2', () => addMonsterParticipant('Goblin2', 8, 2));
  await recordAsync('addMonster OrcBoss', () => addMonsterParticipant('OrcBoss', 60, 1));
  await recordAsync('addMonster Wolf', () => addMonsterParticipant('Wolf', 14, 3));
  await recordAsync('addNpc Merchant', () => addMonsterParticipant('Merchant', 12, 0, true));

  // add chars into encounter
  await recordAsync('addCharParticipant Fighter', () => addCharacterParticipant('Fighter'));
  await recordAsync('addCharParticipant Cleric', () => addCharacterParticipant('Cleric'));
  await recordAsync('addCharParticipant Rogue', () => addCharacterParticipant('Rogue'));
  await recordAsync('addAllChars', () => addAllCharacters()); // bulk add path

  // hidden hp toggle x2 (back to default)
  record('toggleHidePlayerHp', () => toggleHidePlayerHpAction());
  record('toggleHidePlayerHp back', () => toggleHidePlayerHpAction());

  await recordAsync('startCombat', () => startCombat());

  // ---------- 100 ROUNDS (loop by actual round-wrap count) ----------
  let roundsDone = 0;
  let prevRound = enc.round;
  let turnInRound = 0;
  let turnTotal = 0;

  while (roundsDone < ROUNDS) {
    turnTotal++;
    const actor = anyById(enc.currentTurnParticipantId);
    const r = enc.round;

    // per-turn deterministic actions keyed by round + actor type
    // damage OrcBoss every even round
    if (r % 2 === 0 && turnInRound === 0) {
      await recordAsync(`r${r} damage OrcBoss`, () => applyDamage('OrcBoss', 3));
    }
    // heal Cleric every 3 rounds
    if (r % 3 === 0 && turnInRound === 1) {
      record(`r${r} heal Cleric`, () => applyHeal('Cleric', 2));
    }
    // condition on Fighter every 5 rounds
    if (r % 5 === 0 && turnInRound === 2) {
      record(`r${r} condition Fighter stunned`, () => toggleConditionAction('Fighter', 'Stunned'));
    }
    // toggleActive Goblin2 every 7 rounds (toggle off, next 7 toggle on)
    if (r % 7 === 0 && turnInRound === 3) {
      record(`r${r} toggleActive Goblin2`, () => toggleActive('Goblin2'));
    }
    // edit Wolf initiative every 13 rounds
    if (r % 13 === 0 && turnInRound === 4) {
      record(`r${r} edit Wolf init`, () => editParticipant('Wolf', { initiative: 15 }));
    }

    // pause/resume + add reinforcement + edit every 10 rounds
    if (r % 10 === 0 && turnInRound === 0) {
      await recordAsync(`r${r} pause`, () => pauseCombat());
      await recordAsync(`r${r} addReinforcement`, () => addMonsterParticipant(`Reinforce${r}`, 10, 1));
      await recordAsync(`r${r} edit Rogue initiative`, () => editParticipant('Rogue', { initiative: 20 }));
      await recordAsync(`r${r} resume`, () => resumeCombat());
    }

    // create a same-init tie + drag every 15 rounds (exercises reorderParticipants)
    if (r % 15 === 0 && turnInRound === 5) {
      const g1 = any('Goblin1');
      if (g1 && alive('Goblin2')) {
        record(`r${r} tie Goblin2->Goblin1 init`, () => editParticipant('Goblin2', { initiative: g1.initiative }));
        record(`r${r} drag Goblin2 before Goblin1`, () => dragTie('Goblin2', 'Goblin1'));
      }
    }

    // death scenarios: drop a PC to 0, death saves, revive
    if (r === 25 && turnInRound === 0) {
      await recordAsync(`r${r} drop Rogue`, () => applyDamage('Rogue', 99));
      record(`r${r} deathSave1 Rogue`, () => deathSaveAction('Rogue', 'fail', 1));
      record(`r${r} revive Rogue`, () => applyHeal('Rogue', 22));
    }
    // round 50: full 3-success death-save path (isDying) on Cleric, then remove
    if (r === 50 && turnInRound === 0) {
      await recordAsync(`r${r} drop Cleric`, () => applyDamage('Cleric', 99));
      await recordAsync(`r${r} deathSave Cleric x3 (isDying)`, async () => {
        deathSaveAction('Cleric', 'fail', 1);
        deathSaveAction('Cleric', 'fail', 2);
        deathSaveAction('Cleric', 'fail', 3); // → dead
      });
      const cl = any('Cleric');
      if (cl && cl.isDying) record(`r${r} remove dying Cleric`, () => removeParticipantByName('Cleric'));
    }

    // remove a reinforcement every 30 rounds
    if (r % 30 === 0 && turnInRound === 1) {
      const rein = any(`Reinforce${r - 10}`);
      if (rein) record(`r${r} remove Reinforce${r - 10}`, () => removeParticipantByName(`Reinforce${r - 10}`));
    }

    // toggle hide hp every 20 rounds
    if (r % 20 === 0 && turnInRound === 0) {
      record(`r${r} toggleHidePlayerHp`, () => toggleHidePlayerHpAction());
      record(`r${r} toggleHidePlayerHp back`, () => toggleHidePlayerHpAction());
    }

    // rotation integrity check every 10 rounds at round start
    if (turnInRound === 0 && r % 10 === 0) {
      record(`r${r} rotation-check`, () => {
        const order = enc.turnOrderIds || [];
        const uniq = new Set(order);
        if (uniq.size !== order.length) throw new Error(`turnOrderIds dup: ${JSON.stringify(order)}`);
        if (enc.currentTurnParticipantId && !order.includes(enc.currentTurnParticipantId)) {
          throw new Error(`currentTurn ${enc.currentTurnParticipantId} not in turnOrderIds`);
        }
        const ids = enc.participants.map(p => p.id);
        if (JSON.stringify(order) !== JSON.stringify(ids)) {
          throw new Error(`turnOrderIds drift: order=${JSON.stringify(order)} ids=${JSON.stringify(ids)}`);
        }
      });
    }

    // advance turn
    await recordAsync(`r${r} turn${turnInRound} nextTurn`, () => nextTurnAction());
    turnInRound++;

    // round wrap detected
    if (enc.round > prevRound) {
      roundsDone++;
      prevRound = enc.round;
      turnInRound = 0;
    }
  }

  await recordAsync('endCombat', () => endCombat());

  // ---------- report ----------
  const failed = RESULTS.filter(x => !x.ok);
  if (failed.length > 0) {
    const msg = failed.map(f => `FAIL [${f.phase}]: ${f.err}`).join('\n');
    // eslint-disable-next-line no-console
    console.error(`\n=== SCENARIO FAILURES (${failed.length}/${RESULTS.length}) ===\n${msg}\n`);
  }
  expect(failed).toEqual([]);
  expect(roundsDone).toBe(ROUNDS);

  // lifecycle assertions (activeDisplay mirrors combat state)
  expect(enc.isStarted).toBe(false);
  expect(enc.round).toBe(0);
  expect(enc.currentTurnParticipantId).toBeNull();
  expect(display.activeCampaignId).toBeNull();
  expect(display.activeEncounterId).toBeNull();
});

function anyById(id) {
  return enc.participants.find(p => p.id === id);
}