// This test file has been split into smaller, more focused test files for better reliability:
// - combat-movement-highlights.test.js (CoA 6, 7) - Tests highlight behavior
// - combat-movement-highlights-5.test.js (CoA 5) - Tests mesh creation (currently hangs, needs investigation)
// - combat-movement-calculation.test.js (CoA 8) - Tests reachable tile calculation
// - combat-movement-execution.test.js (CoA 9, 10, 11) - Tests actual movement execution
//
// The split improves test reliability and performance by avoiding resource accumulation issues.
// CoA 5 hangs even in isolation, suggesting an issue with THREE.js mesh creation/cleanup.

import { expect } from "@esm-bundle/chai";
import * as THREE from "three";
import { GameLoop } from "../../../src/core/GameLoop.js";
import {
  createGameLoopSetup,
  cleanupGameLoop,
  createRunData,
  createMockGameStateManagerForCombat,
  setupCombatUnits,
  cleanupTurnSystem,
} from "./helpers.js";

describe.skip("Core: GameLoop - Combat Movement (Legacy - Split into separate files)", function () {
  this.timeout(30000);

  let gameLoop;
  let container;
  let mockGameStateManager;
  let playerUnit;
  let enemyUnit;

  beforeEach(async () => {
    const setup = createGameLoopSetup();
    gameLoop = setup.gameLoop;
    container = setup.container;

    // Clean up any existing state first
    if (gameLoop.turnSystemAbortController) {
      gameLoop.turnSystemAbortController.abort();
    }
    gameLoop.stop();
    if (
      gameLoop.turnSystem &&
      typeof gameLoop.turnSystem.reset === "function"
    ) {
      gameLoop.turnSystem.reset();
    }

    gameLoop.init(container);
    mockGameStateManager = createMockGameStateManagerForCombat();
    gameLoop.gameStateManager = mockGameStateManager;

    const runData = createRunData({
      squad: [{ id: "u1", classId: "CLASS_VANGUARD" }],
    });
    await gameLoop.startLevel(runData, { startAnimation: false });

    // Mock updateCombatState to avoid slow file fetches that can cause hangs
    // Replace with a no-op that resolves immediately
    gameLoop.updateCombatState = async () => Promise.resolve();

    const units = setupCombatUnits(gameLoop);
    playerUnit = units.playerUnit;
    enemyUnit = units.enemyUnit;
  });

  afterEach(async () => {
    // Clear highlights first to free Three.js resources
    if (gameLoop.clearMovementHighlights) {
      gameLoop.clearMovementHighlights();
    }
    if (gameLoop.clearSpawnZoneHighlights) {
      gameLoop.clearSpawnZoneHighlights();
    }

    // Ensure turn system is properly cleaned up
    if (gameLoop.turnSystem) {
      try {
        if (
          gameLoop.turnSystem.phase !== "INIT" &&
          gameLoop.turnSystem.phase !== "COMBAT_END"
        ) {
          gameLoop.turnSystem.endCombat();
        }
      } catch (e) {
        // Ignore errors during cleanup
      }
    }

    cleanupTurnSystem(gameLoop);
    cleanupGameLoop(gameLoop, container);

    // Small delay to allow cleanup to complete
    await new Promise((resolve) => setTimeout(resolve, 50));
  });

  it("CoA 5: should show movement highlights for player units in combat", () => {
    mockGameStateManager.getCombatState.returns({
      activeUnit: {
        id: playerUnit.id,
        name: playerUnit.name,
      },
      turnQueue: [],
    });

    gameLoop.updateMovementHighlights(playerUnit);

    expect(gameLoop.movementHighlights.size).to.be.greaterThan(0);
    const highlightArray = Array.from(gameLoop.movementHighlights);
    expect(highlightArray.length).to.be.greaterThan(0);
    expect(highlightArray[0]).to.be.instanceOf(THREE.Mesh);
  });

  it("CoA 6: should not show movement highlights for enemy units", () => {
    mockGameStateManager.getCombatState.returns({
      activeUnit: {
        id: enemyUnit.id,
        name: enemyUnit.name,
      },
      turnQueue: [],
    });

    gameLoop.updateMovementHighlights(enemyUnit);
    expect(gameLoop.movementHighlights.size).to.equal(0);
  });

  it("CoA 7: should clear movement highlights when not in combat", () => {
    mockGameStateManager.getCombatState.returns({
      activeUnit: {
        id: playerUnit.id,
        name: playerUnit.name,
      },
      turnQueue: [],
    });
    gameLoop.updateMovementHighlights(playerUnit);
    expect(gameLoop.movementHighlights.size).to.be.greaterThan(0);

    mockGameStateManager.currentState = "STATE_DEPLOYMENT";
    gameLoop.updateMovementHighlights(playerUnit);
    expect(gameLoop.movementHighlights.size).to.equal(0);
  });

  it("CoA 8: should calculate reachable positions correctly", () => {
    const reachable = gameLoop.movementSystem.getReachableTiles(playerUnit, 4);

    expect(reachable).to.be.an("array");
    expect(reachable.length).to.be.greaterThan(0);

    reachable.forEach((pos) => {
      expect(pos).to.have.property("x");
      expect(pos).to.have.property("y");
      expect(pos).to.have.property("z");
      expect(gameLoop.grid.isValidBounds(pos)).to.be.true;
    });
  });

  it("CoA 9: should move player unit in combat when clicking valid position", async () => {
    // Set player unit to have high charge so it becomes active immediately
    playerUnit.chargeMeter = 100;
    playerUnit.baseStats.speed = 20; // High speed to ensure it goes first

    const allUnits = [playerUnit];
    gameLoop.turnSystem.startCombat(allUnits);

    // Verify player is active (should be after startCombat with high charge)
    const activeUnit = gameLoop.turnSystem.getActiveUnit();
    expect(activeUnit).to.equal(playerUnit);

    const initialPos = { ...playerUnit.position };
    const targetPos = {
      x: initialPos.x + 1,
      y: initialPos.y,
      z: initialPos.z,
    };
    const initialAP = playerUnit.currentAP;

    await gameLoop.handleCombatMovement(targetPos);

    if (
      playerUnit.position.x !== initialPos.x ||
      playerUnit.position.z !== initialPos.z
    ) {
      expect(playerUnit.position.x).to.equal(targetPos.x);
      expect(playerUnit.position.z).to.equal(targetPos.z);
      expect(playerUnit.currentAP).to.be.lessThan(initialAP);
    } else {
      expect(playerUnit.currentAP).to.be.at.most(initialAP);
    }
  });

  it("CoA 10: should not move unit if target is not reachable", async () => {
    // Set player unit to have high charge so it becomes active immediately
    playerUnit.chargeMeter = 100;
    playerUnit.baseStats.speed = 20;

    const allUnits = [playerUnit];
    gameLoop.turnSystem.startCombat(allUnits);

    // Verify player is active
    expect(gameLoop.turnSystem.getActiveUnit()).to.equal(playerUnit);

    const initialPos = { ...playerUnit.position };
    const targetPos = { x: 20, y: 1, z: 20 };

    gameLoop.isRunning = false;
    gameLoop.inputManager = {
      getCursorPosition: () => targetPos,
      update: () => {},
      isKeyPressed: () => false,
      setCursor: () => {},
    };

    await gameLoop.handleCombatMovement(targetPos);

    expect(playerUnit.position.x).to.equal(initialPos.x);
    expect(playerUnit.position.z).to.equal(initialPos.z);
  });

  it("CoA 11: should not move unit if not enough AP", async () => {
    // Set player unit to have high charge so it becomes active immediately
    playerUnit.chargeMeter = 100;
    playerUnit.baseStats.speed = 20;

    const allUnits = [playerUnit];
    gameLoop.turnSystem.startCombat(allUnits);

    // Verify player is active
    expect(gameLoop.turnSystem.getActiveUnit()).to.equal(playerUnit);

    playerUnit.currentAP = 0;
    const initialPos = { ...playerUnit.position };
    const targetPos = { x: 6, y: 1, z: 5 };

    gameLoop.isRunning = false;
    gameLoop.inputManager = {
      getCursorPosition: () => targetPos,
      update: () => {},
      isKeyPressed: () => false,
      setCursor: () => {},
    };

    await gameLoop.handleCombatMovement(targetPos);
    expect(playerUnit.position.x).to.equal(initialPos.x);
  });
});