package components

import (
	"os"
	"path/filepath"
	"testing"

	lazycoreUtils "github.com/jesseduffield/lazycore/pkg/utils"
	"github.com/jesseduffield/lazygit/pkg/commands/git_commands"
	"github.com/jesseduffield/lazygit/pkg/commands/models"
	"github.com/jesseduffield/lazygit/pkg/config"
	"github.com/jesseduffield/lazygit/pkg/gocui"
	"github.com/jesseduffield/lazygit/pkg/gui/types"
	integrationTypes "github.com/jesseduffield/lazygit/pkg/integration/types"
	"github.com/stretchr/testify/assert"
)

// this file is for testing our test code (meta, I know)

type coordinate struct {
	x, y int
}

type fakeGuiDriver struct {
	failureMessage      string
	pressedKeys         []string
	clickedCoordinates  []coordinate
	heldCoordinates     []coordinate
	movedCoordinates    []coordinate
	releasedCoordinates []coordinate
	scrolledCoordinates []coordinate
	onUIThread          bool
	onUIThreadCallCount int
}

var _ integrationTypes.GuiDriver = &fakeGuiDriver{}

func (self *fakeGuiDriver) PressKey(key string) {
	self.pressedKeys = append(self.pressedKeys, key)
}

func (self *fakeGuiDriver) PressKeysRapidly(keys ...string) {
	self.pressedKeys = append(self.pressedKeys, keys...)
}

func (self *fakeGuiDriver) Click(x, y int) {
	self.clickedCoordinates = append(self.clickedCoordinates, coordinate{x: x, y: y})
}

func (self *fakeGuiDriver) ClickAndHold(x, y int) {
	self.heldCoordinates = append(self.heldCoordinates, coordinate{x: x, y: y})
}

func (self *fakeGuiDriver) MouseMove(x, y int) {
	self.movedCoordinates = append(self.movedCoordinates, coordinate{x: x, y: y})
}

func (self *fakeGuiDriver) MouseRelease(x, y int) {
	self.releasedCoordinates = append(self.releasedCoordinates, coordinate{x: x, y: y})
}

func (self *fakeGuiDriver) ScrollWheelDown(x, y int) {
	self.scrolledCoordinates = append(self.scrolledCoordinates, coordinate{x: x, y: y})
}

func (self *fakeGuiDriver) RefreshInBackground() {
}

func (self *fakeGuiDriver) OnUIThreadAndWait(f func()) {
	self.onUIThreadCallCount++
	self.onUIThread = true
	f()
	self.onUIThread = false
}

func (self *fakeGuiDriver) FocusIn() {
}

func (self *fakeGuiDriver) FocusInAndClick(x, y int) {
	self.clickedCoordinates = append(self.clickedCoordinates, coordinate{x: x, y: y})
}

func (self *fakeGuiDriver) Keys() config.KeybindingConfig {
	return config.KeybindingConfig{}
}

func (self *fakeGuiDriver) CurrentContext() types.Context {
	return nil
}

func (self *fakeGuiDriver) ContextForView(viewName string) types.Context {
	return nil
}

func (self *fakeGuiDriver) Fail(message string) {
	self.failureMessage = message
}

func (self *fakeGuiDriver) Log(message string) {
}

func (self *fakeGuiDriver) LogUI(message string) {
}

func (self *fakeGuiDriver) CheckedOutRef() *models.Branch {
	return nil
}

func (self *fakeGuiDriver) MainView() *gocui.View {
	return nil
}

func (self *fakeGuiDriver) SecondaryView() *gocui.View {
	return nil
}

func (self *fakeGuiDriver) View(viewName string) *gocui.View {
	return nil
}

func (self *fakeGuiDriver) TopViewInWindow(windowName string) *gocui.View {
	return nil
}

func (self *fakeGuiDriver) SetCaption(string) {
}

func (self *fakeGuiDriver) SetCaptionPrefix(string) {
}

func (self *fakeGuiDriver) NextToast() *string {
	return nil
}

func (self *fakeGuiDriver) CheckAllToastsAcknowledged() {}

func (self *fakeGuiDriver) Headless() bool { return false }

func (self *fakeGuiDriver) PretendMergeOrRebaseStartedInLazygit() {}

func TestManualFailure(t *testing.T) {
	test := NewIntegrationTest(NewIntegrationTestArgs{
		Description: unitTestDescription,
		Run: func(t *TestDriver, keys config.KeybindingConfig) {
			t.Fail("blah")
		},
	})
	driver := &fakeGuiDriver{}
	test.Run(driver)
	assert.Equal(t, "blah", driver.failureMessage)
}

func TestSuccess(t *testing.T) {
	test := NewIntegrationTest(NewIntegrationTestArgs{
		Description: unitTestDescription,
		Run: func(t *TestDriver, keys config.KeybindingConfig) {
			t.press("a")
			t.press("b")
			t.click(0, 1)
			t.click(2, 3)
			t.clickAndHold(0, 1)
			t.mouseMove(2, 3)
			t.repeatMouseMove()
			t.mouseRelease()
		},
	})
	driver := &fakeGuiDriver{}
	test.Run(driver)
	assert.EqualValues(t, []string{"a", "b"}, driver.pressedKeys)
	assert.EqualValues(t, []coordinate{{0, 1}, {2, 3}}, driver.clickedCoordinates)
	assert.EqualValues(t, []coordinate{{0, 1}}, driver.heldCoordinates)
	assert.EqualValues(t, []coordinate{{2, 3}, {2, 3}}, driver.movedCoordinates)
	assert.EqualValues(t, []coordinate{{2, 3}}, driver.releasedCoordinates)
	assert.Equal(t, "", driver.failureMessage)
}

func TestViewDriverPointerCoordinates(t *testing.T) {
	guiDriver := &fakeGuiDriver{}
	testDriver := NewTestDriver(guiDriver, nil, config.KeybindingConfig{}, 0)
	view := gocui.NewView("source", 10, 20, 30, 31, gocui.OutputNormal)
	targetView := gocui.NewView("target", 40, 50, 60, 61, gocui.OutputNormal)
	viewDriver := &ViewDriver{
		getView: func() *gocui.View {
			assert.True(t, guiDriver.onUIThread)
			return view
		},
		t: testDriver,
	}
	targetViewDriver := &ViewDriver{
		getView: func() *gocui.View {
			assert.True(t, guiDriver.onUIThread)
			return targetView
		},
		t: testDriver,
	}

	viewDriver.
		Click(1, 2).
		FocusInAndClick(3, 4).
		ClickAndHold(5, 6).
		MouseMove(7, 8).
		MouseMoveToBottom(9).
		MouseMoveToView(targetViewDriver, 10, 11).
		ScrollWheelDown()

	assert.Equal(t, []coordinate{{12, 23}, {14, 25}}, guiDriver.clickedCoordinates)
	assert.Equal(t, []coordinate{{16, 27}}, guiDriver.heldCoordinates)
	assert.Equal(t, []coordinate{{18, 29}, {20, 30}, {51, 62}}, guiDriver.movedCoordinates)
	assert.Equal(t, []coordinate{{11, 21}}, guiDriver.scrolledCoordinates)
	assert.Equal(t, 7, guiDriver.onUIThreadCallCount)
}

func TestFailingFixture(t *testing.T) {
	test := NewIntegrationTest(NewIntegrationTestArgs{
		Description: unitTestDescription,
		SetupRepo: func(shell *Shell) {
			shell.RunCommand([]string{"git", "checkout", "no-such-branch"})
			shell.CreateFile("reached.txt", "")
		},
		Run: func(t *TestDriver, keys config.KeybindingConfig) {},
	})

	paths := NewPaths(t.TempDir())
	assert.NoError(t, os.MkdirAll(paths.ActualRepo(), 0o777))

	workingDir, err := createFixture(test, paths, lazycoreUtils.GetLazyRootDirectory())

	assert.ErrorContains(t, err, "git checkout no-such-branch")
	assert.Empty(t, workingDir)
	// the steps following the failing one are skipped
	assert.NoFileExists(t, filepath.Join(paths.ActualRepo(), "reached.txt"))
}

func TestGitVersionRestriction(t *testing.T) {
	scenarios := []struct {
		testName          string
		gitVersion        GitVersionRestriction
		expectedShouldRun bool
	}{
		{
			testName:          "AtLeast, current is newer",
			gitVersion:        AtLeast("2.24.9"),
			expectedShouldRun: true,
		},
		{
			testName:          "AtLeast, current is same",
			gitVersion:        AtLeast("2.25.0"),
			expectedShouldRun: true,
		},
		{
			testName:          "AtLeast, current is older",
			gitVersion:        AtLeast("2.26.0"),
			expectedShouldRun: false,
		},
		{
			testName:          "Before, current is older",
			gitVersion:        Before("2.24.9"),
			expectedShouldRun: false,
		},
		{
			testName:          "Before, current is same",
			gitVersion:        Before("2.25.0"),
			expectedShouldRun: false,
		},
		{
			testName:          "Before, current is newer",
			gitVersion:        Before("2.26.0"),
			expectedShouldRun: true,
		},
		{
			testName:          "Includes, current is included",
			gitVersion:        Includes("2.23.0", "2.25.0"),
			expectedShouldRun: true,
		},
		{
			testName:          "Includes, current is not included",
			gitVersion:        Includes("2.23.0", "2.27.0"),
			expectedShouldRun: false,
		},
	}

	currentGitVersion := git_commands.GitVersion{Major: 2, Minor: 25, Patch: 0}

	for _, s := range scenarios {
		t.Run(s.testName, func(t *testing.T) {
			test := NewIntegrationTest(NewIntegrationTestArgs{
				Description: unitTestDescription,
				GitVersion:  s.gitVersion,
			})
			shouldRun := test.ShouldRunForGitVersion(&currentGitVersion)
			assert.Equal(t, shouldRun, s.expectedShouldRun)
		})
	}
}