local test_helper = require('test.test_helper')
local mocks = test_helper.mocks
local utils = test_helper.utils

describe('Core Module', function()
  local core
  
  setup(function()
    mocks.setupFilesystem()
    core = require('src.core')
  end)
  
  it('should initialize game state', function()
    core.init()
    assert.are.equal(0, core.state.gameTime)
    assert.are.equal(2, #core.state.cats)
    assert.are.equal(0, #core.state.furniture)
  end)
  
  it('should spawn cats', function()
    local initialCount = #core.state.cats
    core.spawnCat()
    assert.are.equal(initialCount + 1, #core.state.cats)
  end)
  
  it('should generate cat names', function()
    local name = core.generateCatName()
    assert.are_not.equal(nil, name:find(' '))
  end)
  
  it('should remove cats', function()
    local catId = core.state.cats[1].id
    local result = core.removeCat(catId)
    assert.is_true(result)
    assert.are.equal(1, #core.state.cats)
  end)
  
  it('should add furniture', function()
    local furn = core.addFurniture('bed', { x = 0, y = 0, z = 0 })
    assert.are_not.equal(nil, furn)
  end)
  
  it('should reject invalid furniture type', function()
    local furn = core.addFurniture('invalid_type', { x = 0, y = 0, z = 0 })
    assert.is_false(furn)
  end)
  
  it('should save game', function()
    local result = core.saveGame()
    assert.is_true(result)
  end)
  
  it('should load game', function()
    core.saveGame()
    local result = core.loadGame()
    assert.is_true(result)
  end)
  
  it('should handle missing save file', function()
    local result = core.loadGame()
    assert.is_false(result)
  end)
  
  it('should toggle pause', function()
    core.togglePause()
    assert.is_true(core.state.isPaused)
    core.togglePause()
    assert.is_false(core.state.isPaused)
  end)
  
  it('should get happiness percentage', function()
    local happiness = core.getHappinessPercentage()
    assert.is_true(happiness >= 0)
    assert.is_true(happiness <= 100)
  end)
  
  it('should calculate happiness with zero cats', function()
    core.state.cats = {}
    core.calculateHouseHappiness()
    assert.are.equal(0, core.state.house.totalHappiness)
  end)
  
  it('should check cat departures', function()
    local cat = utils.createMockCat({ needs = { comfort = 0.05, hunger = 0.5 } })
    table.insert(core.state.cats, cat)
    local initialCount = #core.state.cats
    core.checkCatDepartures()
    assert.is_true(#core.state.cats < initialCount)
  end)
  
  it('should handle nil cat in update', function()
    core.state.cats = { nil }
    core.update(0.1)
  end)
  
  it('should handle nil cat in happiness calculation', function()
    core.state.cats = { nil }
    core.calculateHouseHappiness()
  end)
  
  it('should handle nil cat in removeCat', function()
    local result = core.removeCat(999)
    assert.is_false(result)
  end)
  
  it('should handle nil core in update', function()
    _G.core = nil
    core.update(0.1)
  end)
  
  it('should handle nil cat module', function()
    _G.cat = nil
    core.update(0.1)
  end)
  
  it('should handle nil ui module', function()
    _G.ui = nil
    core.update(0.1)
  end)
  
  it('should handle nil voxel module', function()
    _G.voxel = nil
    core.update(0.1)
  end)
  
  it('should handle nil audio module', function()
    _G.audio = nil
    core.update(0.1)
  end)
  
  it('should handle nil house module', function()
    _G.house = nil
    core.update(0.1)
  end)
  
  it('should handle empty furniture list', function()
    core.state.furniture = {}
    core.calculateHouseHappiness()
  end)
  
  it('should handle nil needs in cat', function()
    local cat = utils.createMockCat()
    cat.needs = nil
    table.insert(core.state.cats, cat)
    core.calculateHouseHappiness()
  end)
  
  it('should handle nil personality in cat', function()
    local cat = utils.createMockCat()
    cat.personality = nil
    table.insert(core.state.cats, cat)
    cat:updateNeeds()
  end)
  
  it('should handle nil furniture in cat ai behavior', function()
    core.state.furniture = nil
    local cat = utils.createMockCat()
    cat:aiBehavior()
  end)
end)