package scene

import (
	"context"
	"errors"
	"testing"

	"github.com/stashapp/stash/pkg/models"
	"github.com/stashapp/stash/pkg/models/jsonschema"
	"github.com/stashapp/stash/pkg/models/mocks"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/mock"
)

const invalidImage = "aW1hZ2VCeXRlcw&&"

var (
	existingStudioID    = 101
	existingPerformerID = 103
	existingGroupID     = 104
	existingTagID       = 105

	existingStudioName = "existingStudioName"
	existingStudioErr  = "existingStudioErr"
	missingStudioName  = "missingStudioName"

	existingPerformerName = "existingPerformerName"
	existingPerformerErr  = "existingPerformerErr"
	missingPerformerName  = "missingPerformerName"

	existingGroupName = "existingGroupName"
	existingGroupErr  = "existingGroupErr"
	missingGroupName  = "missingGroupName"

	existingTagName = "existingTagName"
	existingTagErr  = "existingTagErr"
	missingTagName  = "missingTagName"
)

var testCtx = context.Background()

func TestImporterPreImport(t *testing.T) {
	i := Importer{
		Input: jsonschema.Scene{
			Cover: invalidImage,
		},
	}

	err := i.PreImport(testCtx)
	assert.NotNil(t, err)

	i.Input.Cover = imageBase64

	err = i.PreImport(testCtx)
	assert.Nil(t, err)
}

func TestImporterPreImportWithStudio(t *testing.T) {
	db := mocks.NewDatabase()

	i := Importer{
		StudioWriter: db.Studio,
		Input: jsonschema.Scene{
			Studio: existingStudioName,
		},
	}

	db.Studio.On("FindByName", testCtx, existingStudioName, false).Return(&models.Studio{
		ID: existingStudioID,
	}, nil).Once()
	db.Studio.On("FindByName", testCtx, existingStudioErr, false).Return(nil, errors.New("FindByName error")).Once()

	err := i.PreImport(testCtx)
	assert.Nil(t, err)
	assert.Equal(t, existingStudioID, *i.scene.StudioID)

	i.Input.Studio = existingStudioErr
	err = i.PreImport(testCtx)
	assert.NotNil(t, err)

	db.AssertExpectations(t)
}

func TestImporterPreImportWithMissingStudio(t *testing.T) {
	db := mocks.NewDatabase()

	i := Importer{
		StudioWriter: db.Studio,
		Input: jsonschema.Scene{
			Studio: missingStudioName,
		},
		MissingRefBehaviour: models.ImportMissingRefEnumFail,
	}

	db.Studio.On("FindByName", testCtx, missingStudioName, false).Return(nil, nil).Times(3)
	db.Studio.On("Create", testCtx, mock.AnythingOfType("*models.Studio")).Run(func(args mock.Arguments) {
		s := args.Get(1).(*models.Studio)
		s.ID = existingStudioID
	}).Return(nil)

	err := i.PreImport(testCtx)
	assert.NotNil(t, err)

	i.MissingRefBehaviour = models.ImportMissingRefEnumIgnore
	err = i.PreImport(testCtx)
	assert.Nil(t, err)

	i.MissingRefBehaviour = models.ImportMissingRefEnumCreate
	err = i.PreImport(testCtx)
	assert.Nil(t, err)
	assert.Equal(t, existingStudioID, *i.scene.StudioID)

	db.AssertExpectations(t)
}

func TestImporterPreImportWithMissingStudioCreateErr(t *testing.T) {
	db := mocks.NewDatabase()

	i := Importer{
		StudioWriter: db.Studio,
		Input: jsonschema.Scene{
			Studio: missingStudioName,
		},
		MissingRefBehaviour: models.ImportMissingRefEnumCreate,
	}

	db.Studio.On("FindByName", testCtx, missingStudioName, false).Return(nil, nil).Once()
	db.Studio.On("Create", testCtx, mock.AnythingOfType("*models.Studio")).Return(errors.New("Create error"))

	err := i.PreImport(testCtx)
	assert.NotNil(t, err)

	db.AssertExpectations(t)
}

func TestImporterPreImportWithPerformer(t *testing.T) {
	db := mocks.NewDatabase()

	i := Importer{
		PerformerWriter:     db.Performer,
		MissingRefBehaviour: models.ImportMissingRefEnumFail,
		Input: jsonschema.Scene{
			Performers: []string{
				existingPerformerName,
			},
		},
	}

	db.Performer.On("FindByNames", testCtx, []string{existingPerformerName}, false).Return([]*models.Performer{
		{
			ID:   existingPerformerID,
			Name: existingPerformerName,
		},
	}, nil).Once()
	db.Performer.On("FindByNames", testCtx, []string{existingPerformerErr}, false).Return(nil, errors.New("FindByNames error")).Once()

	err := i.PreImport(testCtx)
	assert.Nil(t, err)
	assert.Equal(t, []int{existingPerformerID}, i.scene.PerformerIDs.List())

	i.Input.Performers = []string{existingPerformerErr}
	err = i.PreImport(testCtx)
	assert.NotNil(t, err)

	db.AssertExpectations(t)
}

func TestImporterPreImportWithMissingPerformer(t *testing.T) {
	db := mocks.NewDatabase()

	i := Importer{
		PerformerWriter: db.Performer,
		Input: jsonschema.Scene{
			Performers: []string{
				missingPerformerName,
			},
		},
		MissingRefBehaviour: models.ImportMissingRefEnumFail,
	}

	db.Performer.On("FindByNames", testCtx, []string{missingPerformerName}, false).Return(nil, nil).Times(3)
	db.Performer.On("Create", testCtx, mock.AnythingOfType("*models.Performer")).Run(func(args mock.Arguments) {
		p := args.Get(1).(*models.Performer)
		p.ID = existingPerformerID
	}).Return(nil)

	err := i.PreImport(testCtx)
	assert.NotNil(t, err)

	i.MissingRefBehaviour = models.ImportMissingRefEnumIgnore
	err = i.PreImport(testCtx)
	assert.Nil(t, err)

	i.MissingRefBehaviour = models.ImportMissingRefEnumCreate
	err = i.PreImport(testCtx)
	assert.Nil(t, err)
	assert.Equal(t, []int{existingPerformerID}, i.scene.PerformerIDs.List())

	db.AssertExpectations(t)
}

func TestImporterPreImportWithMissingPerformerCreateErr(t *testing.T) {
	db := mocks.NewDatabase()

	i := Importer{
		PerformerWriter: db.Performer,
		Input: jsonschema.Scene{
			Performers: []string{
				missingPerformerName,
			},
		},
		MissingRefBehaviour: models.ImportMissingRefEnumCreate,
	}

	db.Performer.On("FindByNames", testCtx, []string{missingPerformerName}, false).Return(nil, nil).Once()
	db.Performer.On("Create", testCtx, mock.AnythingOfType("*models.Performer")).Return(errors.New("Create error"))

	err := i.PreImport(testCtx)
	assert.NotNil(t, err)

	db.AssertExpectations(t)
}

func TestImporterPreImportWithGroup(t *testing.T) {
	db := mocks.NewDatabase()

	i := Importer{
		GroupWriter:         db.Group,
		MissingRefBehaviour: models.ImportMissingRefEnumFail,
		Input: jsonschema.Scene{
			Groups: []jsonschema.SceneGroup{
				{
					GroupName:  existingGroupName,
					SceneIndex: 1,
				},
			},
		},
	}

	db.Group.On("FindByName", testCtx, existingGroupName, false).Return(&models.Group{
		ID:   existingGroupID,
		Name: existingGroupName,
	}, nil).Once()
	db.Group.On("FindByName", testCtx, existingGroupErr, false).Return(nil, errors.New("FindByName error")).Once()

	err := i.PreImport(testCtx)
	assert.Nil(t, err)
	assert.Equal(t, existingGroupID, i.scene.Groups.List()[0].GroupID)

	i.Input.Groups[0].GroupName = existingGroupErr
	err = i.PreImport(testCtx)
	assert.NotNil(t, err)

	db.AssertExpectations(t)
}

func TestImporterPreImportWithMissingGroup(t *testing.T) {
	db := mocks.NewDatabase()

	i := Importer{
		GroupWriter: db.Group,
		Input: jsonschema.Scene{
			Groups: []jsonschema.SceneGroup{
				{
					GroupName: missingGroupName,
				},
			},
		},
		MissingRefBehaviour: models.ImportMissingRefEnumFail,
	}

	db.Group.On("FindByName", testCtx, missingGroupName, false).Return(nil, nil).Times(3)
	db.Group.On("Create", testCtx, mock.AnythingOfType("*models.Group")).Run(func(args mock.Arguments) {
		m := args.Get(1).(*models.Group)
		m.ID = existingGroupID
	}).Return(nil)

	err := i.PreImport(testCtx)
	assert.NotNil(t, err)

	i.MissingRefBehaviour = models.ImportMissingRefEnumIgnore
	err = i.PreImport(testCtx)
	assert.Nil(t, err)

	i.MissingRefBehaviour = models.ImportMissingRefEnumCreate
	err = i.PreImport(testCtx)
	assert.Nil(t, err)
	assert.Equal(t, existingGroupID, i.scene.Groups.List()[0].GroupID)

	db.AssertExpectations(t)
}

func TestImporterPreImportWithMissingGroupCreateErr(t *testing.T) {
	db := mocks.NewDatabase()

	i := Importer{
		GroupWriter: db.Group,
		Input: jsonschema.Scene{
			Groups: []jsonschema.SceneGroup{
				{
					GroupName: missingGroupName,
				},
			},
		},
		MissingRefBehaviour: models.ImportMissingRefEnumCreate,
	}

	db.Group.On("FindByName", testCtx, missingGroupName, false).Return(nil, nil).Once()
	db.Group.On("Create", testCtx, mock.AnythingOfType("*models.Group")).Return(errors.New("Create error"))

	err := i.PreImport(testCtx)
	assert.NotNil(t, err)

	db.AssertExpectations(t)
}

func TestImporterPreImportWithTag(t *testing.T) {
	db := mocks.NewDatabase()

	i := Importer{
		TagWriter:           db.Tag,
		MissingRefBehaviour: models.ImportMissingRefEnumFail,
		Input: jsonschema.Scene{
			Tags: []string{
				existingTagName,
			},
		},
	}

	db.Tag.On("FindByNames", testCtx, []string{existingTagName}, false).Return([]*models.Tag{
		{
			ID:   existingTagID,
			Name: existingTagName,
		},
	}, nil).Once()
	db.Tag.On("FindByNames", testCtx, []string{existingTagErr}, false).Return(nil, errors.New("FindByNames error")).Once()

	err := i.PreImport(testCtx)
	assert.Nil(t, err)
	assert.Equal(t, []int{existingTagID}, i.scene.TagIDs.List())

	i.Input.Tags = []string{existingTagErr}
	err = i.PreImport(testCtx)
	assert.NotNil(t, err)

	db.AssertExpectations(t)
}

func TestImporterPreImportWithMissingTag(t *testing.T) {
	db := mocks.NewDatabase()

	i := Importer{
		TagWriter: db.Tag,
		Input: jsonschema.Scene{
			Tags: []string{
				missingTagName,
			},
		},
		MissingRefBehaviour: models.ImportMissingRefEnumFail,
	}

	db.Tag.On("FindByNames", testCtx, []string{missingTagName}, false).Return(nil, nil).Times(3)
	db.Tag.On("Create", testCtx, mock.AnythingOfType("*models.Tag")).Run(func(args mock.Arguments) {
		t := args.Get(1).(*models.Tag)
		t.ID = existingTagID
	}).Return(nil)

	err := i.PreImport(testCtx)
	assert.NotNil(t, err)

	i.MissingRefBehaviour = models.ImportMissingRefEnumIgnore
	err = i.PreImport(testCtx)
	assert.Nil(t, err)

	i.MissingRefBehaviour = models.ImportMissingRefEnumCreate
	err = i.PreImport(testCtx)
	assert.Nil(t, err)
	assert.Equal(t, []int{existingTagID}, i.scene.TagIDs.List())

	db.AssertExpectations(t)
}

func TestImporterPreImportWithMissingTagCreateErr(t *testing.T) {
	db := mocks.NewDatabase()

	i := Importer{
		TagWriter: db.Tag,
		Input: jsonschema.Scene{
			Tags: []string{
				missingTagName,
			},
		},
		MissingRefBehaviour: models.ImportMissingRefEnumCreate,
	}

	db.Tag.On("FindByNames", testCtx, []string{missingTagName}, false).Return(nil, nil).Once()
	db.Tag.On("Create", testCtx, mock.AnythingOfType("*models.Tag")).Return(errors.New("Create error"))

	err := i.PreImport(testCtx)
	assert.NotNil(t, err)

	db.AssertExpectations(t)
}