package tdd

import (
	"embed"
	"io"
	"testing"

	"github.com/Snider/Core/pkg/core"
	"github.com/stretchr/testify/assert"
	"github.com/wailsapp/wails/v3/pkg/application"
)

func TestCore_New_Good(t *testing.T) {
	c, err := core.New()
	assert.NoError(t, err)
	assert.NotNil(t, c)
}

// Mock service for testing
type MockService struct {
	Name string
}

func (m *MockService) GetName() string {
	return m.Name
}

func TestCore_WithService_Good(t *testing.T) {
	factory := func(c *core.Core) (any, error) {
		return &MockService{Name: "test"}, nil
	}
	c, err := core.New(core.WithService(factory))
	assert.NoError(t, err)
	svc := c.Service("tdd")
	assert.NotNil(t, svc)
	mockSvc, ok := svc.(*MockService)
	assert.True(t, ok)
	assert.Equal(t, "test", mockSvc.GetName())
}

func TestCore_WithService_Bad(t *testing.T) {
	factory := func(c *core.Core) (any, error) {
		return nil, assert.AnError
	}
	_, err := core.New(core.WithService(factory))
	assert.Error(t, err)
	assert.ErrorIs(t, err, assert.AnError)
}

func TestCore_WithWails_Good(t *testing.T) {
	app := &application.App{}
	c, err := core.New(core.WithWails(app))
	assert.NoError(t, err)
	assert.Equal(t, app, c.App)
}

//go:embed testdata
var testFS embed.FS

func TestCore_WithAssets_Good(t *testing.T) {
	c, err := core.New(core.WithAssets(testFS))
	assert.NoError(t, err)
	assets := c.Assets()
	file, err := assets.Open("testdata/test.txt")
	assert.NoError(t, err)
	defer file.Close()
	content, err := io.ReadAll(file)
	assert.NoError(t, err)
	assert.Equal(t, "hello from testdata\n", string(content))
}

func TestCore_WithServiceLock_Good(t *testing.T) {
	c, err := core.New(core.WithServiceLock())
	assert.NoError(t, err)
	err = c.RegisterService("test", &MockService{})
	assert.Error(t, err)
}

func TestCore_RegisterService_Good(t *testing.T) {
	c, err := core.New()
	assert.NoError(t, err)
	err = c.RegisterService("test", &MockService{Name: "test"})
	assert.NoError(t, err)
	svc := c.Service("test")
	assert.NotNil(t, svc)
	mockSvc, ok := svc.(*MockService)
	assert.True(t, ok)
	assert.Equal(t, "test", mockSvc.GetName())
}

func TestCore_RegisterService_Bad(t *testing.T) {
	c, err := core.New()
	assert.NoError(t, err)
	err = c.RegisterService("test", &MockService{})
	assert.NoError(t, err)
	err = c.RegisterService("test", &MockService{})
	assert.Error(t, err)
	err = c.RegisterService("", &MockService{})
	assert.Error(t, err)
}

func TestCore_ServiceFor_Good(t *testing.T) {
	c, err := core.New()
	assert.NoError(t, err)
	err = c.RegisterService("test", &MockService{Name: "test"})
	assert.NoError(t, err)
	svc, err := core.ServiceFor[*MockService](c, "test")
	assert.NoError(t, err)
	assert.Equal(t, "test", svc.GetName())
}

func TestCore_ServiceFor_Bad(t *testing.T) {
	c, err := core.New()
	assert.NoError(t, err)
	_, err = core.ServiceFor[*MockService](c, "nonexistent")
	assert.Error(t, err)
	err = c.RegisterService("test", "not a service")
	assert.NoError(t, err)
	_, err = core.ServiceFor[*MockService](c, "test")
	assert.Error(t, err)
}

func TestCore_MustServiceFor_Good(t *testing.T) {
	c, err := core.New()
	assert.NoError(t, err)
	err = c.RegisterService("test", &MockService{Name: "test"})
	assert.NoError(t, err)
	svc := core.MustServiceFor[*MockService](c, "test")
	assert.Equal(t, "test", svc.GetName())
}

func TestCore_MustServiceFor_Ugly(t *testing.T) {
	c, err := core.New()
	assert.NoError(t, err)
	assert.Panics(t, func() {
		core.MustServiceFor[*MockService](c, "nonexistent")
	})
	err = c.RegisterService("test", "not a service")
	assert.NoError(t, err)
	assert.Panics(t, func() {
		core.MustServiceFor[*MockService](c, "test")
	})
}

type MockAction struct {
	handled bool
}

func (a *MockAction) Handle(c *core.Core, msg core.Message) error {
	a.handled = true
	return nil
}

func TestCore_ACTION_Good(t *testing.T) {
	c, err := core.New()
	assert.NoError(t, err)
	action := &MockAction{}
	c.RegisterAction(action.Handle)
	err = c.ACTION(nil)
	assert.NoError(t, err)
	assert.True(t, action.handled)
}

func TestCore_RegisterActions_Good(t *testing.T) {
	c, err := core.New()
	assert.NoError(t, err)
	action1 := &MockAction{}
	action2 := &MockAction{}
	c.RegisterActions(action1.Handle, action2.Handle)
	err = c.ACTION(nil)
	assert.NoError(t, err)
	assert.True(t, action1.handled)
	assert.True(t, action2.handled)
}

func TestCore_WithName_Good(t *testing.T) {
	factory := func(c *core.Core) (any, error) {
		return &MockService{Name: "test"}, nil
	}
	c, err := core.New(core.WithName("my-service", factory))
	assert.NoError(t, err)
	svc := c.Service("my-service")
	assert.NotNil(t, svc)
	mockSvc, ok := svc.(*MockService)
	assert.True(t, ok)
	assert.Equal(t, "test", mockSvc.GetName())
}

func TestCore_WithName_Bad(t *testing.T) {
	factory := func(c *core.Core) (any, error) {
		return nil, assert.AnError
	}
	_, err := core.New(core.WithName("my-service", factory))
	assert.Error(t, err)
	assert.ErrorIs(t, err, assert.AnError)
}