// ─── Golem Maintenance Upkeep Tests (Issue #315) ───────────────────────────────
// Tests that multi-type golem cores split upkeep evenly across all mana types.

import { describe, it, expect } from 'vitest';
import {
  CORES, FRAMES, MIND_CIRCUITS,
} from '@/lib/game/data/golems';
import type { GolemDesign, SerializedDesign } from '@/lib/game/data/golems/types';
import type { RuntimeActiveGolem } from '@/lib/game/types';
import { processGolemMaintenance } from './golem-combat-actions';

// ─── Helpers ───────────────────────────────────────────────────────────────────

function makeDesign(
  coreId: string,
  frameId: string,
  circuitId: string,
  enchantIds: string[] = [],
  selectedSpells: string[] = [],
): GolemDesign {
  return {
    id: `test_${coreId}_${frameId}_${circuitId}`,
    name: `Test ${coreId} ${frameId}`,
    core: CORES[coreId],
    frame: FRAMES[frameId],
    mindCircuit: MIND_CIRCUITS[circuitId],
    enchantments: [],
    selectedManaTypes: [],
    selectedSpells,
  };
}

function makeSerialized(design: GolemDesign): SerializedDesign {
  return {
    id: design.id,
    name: design.name,
    coreId: design.core.id,
    frameId: design.frame.id,
    mindCircuitId: design.mindCircuit.id,
    enchantmentIds: [],
    selectedManaTypes: design.selectedManaTypes,
    selectedSpells: design.selectedSpells,
  };
}

function makeActiveGolem(design: GolemDesign, currentMana?: number, attackProgress = 0): RuntimeActiveGolem {
  return {
    designId: design.id,
    summonedFloor: 1,
    attackProgress,
    roomsRemaining: 3,
    currentMana: currentMana ?? design.core.manaCapacity,
    spellCastIndex: 0,
  };
}

// ─── Tests ─────────────────────────────────────────────────────────────────────

describe('processGolemMaintenance - multi-type core upkeep splitting (fix #315)', () => {
  it('single-type core (basic) deducts upkeep from one element', () => {
    const design = makeDesign('basic', 'earth', 'simple');
    const serialized = makeSerialized(design);
    const golem = makeActiveGolem(design);

    const elements = {
      earth: { current: 50, max: 100, unlocked: true },
    };

    const result = processGolemMaintenance(
      [golem],
      { [design.id]: serialized },
      100,
      elements,
    );

    expect(result.maintainedGolems.length).toBe(1);
    // Basic core: manaRegen=0.5, upkeep=1.0/hr, HOURS_PER_TICK=0.04 => 0.04 per tick
    const expectedDeduction = 0.5 * 2 * 0.04; // 0.04
    expect(result.elements.earth.current).toBeCloseTo(50 - expectedDeduction);
  });

  it('multi-type core splits upkeep evenly across selected mana types', () => {
    const design = makeDesign('intermediate', 'earth', 'simple');
    design.selectedManaTypes = ['fire', 'water'];
    const serialized = makeSerialized(design);
    const golem = makeActiveGolem(design);

    const elements = {
      fire: { current: 50, max: 100, unlocked: true },
      water: { current: 50, max: 100, unlocked: true },
    };

    const result = processGolemMaintenance(
      [golem],
      { [design.id]: serialized },
      100,
      elements,
    );

    expect(result.maintainedGolems.length).toBe(1);
    // Intermediate core: manaRegen=1.5, upkeep=3.0/hr split across 2 types
    // Per type: 1.5/hr * 0.04 = 0.06 per tick
    const expectedDeduction = (1.5 * 2 * 0.04) / 2; // 0.06
    expect(result.elements.fire.current).toBeCloseTo(50 - expectedDeduction);
    expect(result.elements.water.current).toBeCloseTo(50 - expectedDeduction);
  });

  it('advanced core (3 types) splits upkeep three ways', () => {
    const design = makeDesign('advanced', 'steel', 'simple');
    design.selectedManaTypes = ['fire', 'water', 'earth'];
    const serialized = makeSerialized(design);
    const golem = makeActiveGolem(design);

    const elements = {
      fire: { current: 50, max: 100, unlocked: true },
      water: { current: 50, max: 100, unlocked: true },
      earth: { current: 50, max: 100, unlocked: true },
    };

    const result = processGolemMaintenance(
      [golem],
      { [design.id]: serialized },
      100,
      elements,
    );

    expect(result.maintainedGolems.length).toBe(1);
    // Advanced core: manaRegen=3.0, upkeep=6.0/hr split across 3 types
    // Per type: 2.0/hr * 0.04 = 0.08 per tick
    const expectedDeduction = (3.0 * 2 * 0.04) / 3; // 0.08
    expect(result.elements.fire.current).toBeCloseTo(50 - expectedDeduction);
    expect(result.elements.water.current).toBeCloseTo(50 - expectedDeduction);
    expect(result.elements.earth.current).toBeCloseTo(50 - expectedDeduction);
  });

  it('dismisses golem when one mana type is insufficient for split upkeep', () => {
    const design = makeDesign('intermediate', 'earth', 'simple');
    design.selectedManaTypes = ['fire', 'water'];
    const serialized = makeSerialized(design);
    const golem = makeActiveGolem(design);

    const elements = {
      fire: { current: 50, max: 100, unlocked: true },
      water: { current: 0.001, max: 100, unlocked: true }, // Almost empty
    };

    const result = processGolemMaintenance(
      [golem],
      { [design.id]: serialized },
      100,
      elements,
    );

    expect(result.maintainedGolems.length).toBe(0);
    expect(result.logMessages[0]).toContain('dismissed');
    expect(result.logMessages[0]).toContain('water');
  });

  it('dismisses golem when one mana type is not unlocked', () => {
    const design = makeDesign('intermediate', 'earth', 'simple');
    design.selectedManaTypes = ['fire', 'water'];
    const serialized = makeSerialized(design);
    const golem = makeActiveGolem(design);

    const elements = {
      fire: { current: 50, max: 100, unlocked: true },
      // water not present => not unlocked
    };

    const result = processGolemMaintenance(
      [golem],
      { [design.id]: serialized },
      100,
      elements,
    );

    expect(result.maintainedGolems.length).toBe(0);
    expect(result.logMessages[0]).toContain('dismissed');
  });

  it('does not deduct any mana when upkeep cannot be paid (atomic check)', () => {
    const design = makeDesign('intermediate', 'earth', 'simple');
    design.selectedManaTypes = ['fire', 'water'];
    const serialized = makeSerialized(design);
    const golem = makeActiveGolem(design);

    const elements = {
      fire: { current: 50, max: 100, unlocked: true },
      water: { current: 0.001, max: 100, unlocked: true },
    };

    const result = processGolemMaintenance(
      [golem],
      { [design.id]: serialized },
      100,
      elements,
    );

    // fire should NOT have been deducted since water couldn't pay its share
    expect(result.elements.fire.current).toBe(50);
  });
});