package perspective

import (
	"context"
	"testing"

	"4vif5i.gitea.cloud/numenor-labs/discourse/backend/ipfs"
	"github.com/go-redis/redismock/v8"
	"github.com/stretchr/testify/assert"
	"gorm.io/driver/sqlite"
	"gorm.io/gorm"
)

// Setup test dependencies
func setupTestDependencies(t *testing.T) (*PerspectiveService, redismock.ClientMock) {
	// Setup mock Redis
	client, mock := redismock.NewClientMock()

	// Setup in-memory SQLite database
	db, err := gorm.Open(sqlite.Open(":memory:"), &gorm.Config{})
	if err != nil {
		t.Fatalf("Failed to open in-memory database: %v", err)
	}

	// Create a mock IPFS service
	ipfsService := ipfs.NewMockIPFSService()

	// Create the service with our mocks
	service := NewPerspectiveService(client, db, ipfsService)

	return service, mock
}

func TestSubmitPerspective_Success(t *testing.T) {
	service, mock := setupTestDependencies(t)
	ctx := context.Background()

	// Setup Redis mock expectations for unverified user
	mock.ExpectExists("user:0x1234:submissions").SetVal(0)
	mock.ExpectSet("user:0x1234:submissions", 1, RedisTTL).SetVal("OK")

	// Call the service method
	ipfsHash, err := service.SubmitPerspective(
		ctx,
		"issue123",
		"This is a test perspective",
		"",
		"0x1234",
		false,
		ValidCaptchaToken,
	)

	// Verify the results
	assert.NoError(t, err)
	assert.NotEmpty(t, ipfsHash)

	// Verify Redis mock expectations were met
	if err := mock.ExpectationsWereMet(); err != nil {
		t.Errorf("Redis expectations were not met: %v", err)
	}

	// Verify perspective was stored in the database
	var perspective Perspective
	err = service.db.Where("ipfs_hash = ?", ipfsHash).First(&perspective).Error
	assert.NoError(t, err)
	assert.Equal(t, "issue123", perspective.IssueID)
	assert.Equal(t, "0x1234", perspective.UserAddress)
	assert.Equal(t, false, perspective.IsVerified)
}

func TestSubmitPerspective_VerifiedUser(t *testing.T) {
	service, mock := setupTestDependencies(t)
	ctx := context.Background()

	// No need to mock Redis for verified user

	// Call the service method
	ipfsHash, err := service.SubmitPerspective(
		ctx,
		"issue123",
		"This is a test perspective from a verified user",
		"",
		"0x5678",
		true, // Verified user
		"",   // No captcha needed
	)

	// Verify the results
	assert.NoError(t, err)
	assert.NotEmpty(t, ipfsHash)

	// Verify Redis mock expectations were met
	if err := mock.ExpectationsWereMet(); err != nil {
		t.Errorf("Redis expectations were not met: %v", err)
	}

	// Verify perspective was stored in the database
	var perspective Perspective
	err = service.db.Where("ipfs_hash = ?", ipfsHash).First(&perspective).Error
	assert.NoError(t, err)
	assert.Equal(t, "issue123", perspective.IssueID)
	assert.Equal(t, "0x5678", perspective.UserAddress)
	assert.Equal(t, true, perspective.IsVerified)
}

func TestSubmitPerspective_RateLimit(t *testing.T) {
	service, mock := setupTestDependencies(t)
	ctx := context.Background()

	// Setup Redis mock expectations for rate-limited user
	mock.ExpectGet("user:0x1234:submissions").SetVal("5") // Rate limit reached

	// Call the service method
	_, err := service.SubmitPerspective(
		ctx,
		"issue123",
		"This is a test perspective that should be rate limited",
		"",
		"0x1234",
		false,
		ValidCaptchaToken,
	)

	// Verify the results
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "rate limit exceeded")

	// Verify Redis mock expectations were met
	if err := mock.ExpectationsWereMet(); err != nil {
		t.Errorf("Redis expectations were not met: %v", err)
	}
}

func TestSubmitPerspective_InvalidCaptcha(t *testing.T) {
	service, _ := setupTestDependencies(t)
	ctx := context.Background()

	// Call the service method with invalid captcha
	_, err := service.SubmitPerspective(
		ctx,
		"issue123",
		"This is a test perspective with invalid captcha",
		"",
		"0x1234",
		false,
		"invalid-token",
	)

	// Verify the results
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "invalid CAPTCHA token")
}

func TestSubmitPerspective_OversizedText(t *testing.T) {
	service, _ := setupTestDependencies(t)
	ctx := context.Background()

	// Generate a text that exceeds the maximum length
	oversizedText := ""
	for i := 0; i < MaxTextLength+100; i++ {
		oversizedText += "a"
	}

	// Call the service method with oversized text
	_, err := service.SubmitPerspective(
		ctx,
		"issue123",
		oversizedText,
		"",
		"0x1234",
		true,
		"",
	)

	// Verify the results
	assert.Error(t, err)
	assert.Contains(t, err.Error(), "exceeds maximum length")
}

func TestGetPerspectivesByIssue(t *testing.T) {
	service, _ := setupTestDependencies(t)
	ctx := context.Background()

	// Insert test perspectives for the issue
	testIssueID := "issue456"

	// Create and store a few test perspectives
	for i := 0; i < 3; i++ {
		ipfsHash, err := service.SubmitPerspective(
			ctx,
			testIssueID,
			"Test perspective",
			"",
			"0xABCD",
			true,
			"",
		)
		assert.NoError(t, err)
		assert.NotEmpty(t, ipfsHash)
	}

	// Also create a perspective for a different issue
	_, err := service.SubmitPerspective(
		ctx,
		"different-issue",
		"Different issue perspective",
		"",
		"0xABCD",
		true,
		"",
	)
	assert.NoError(t, err)

	// Get perspectives for the test issue
	perspectives, err := service.GetPerspectivesByIssue(testIssueID)

	// Verify the results
	assert.NoError(t, err)
	assert.Len(t, perspectives, 3) // Should only find the 3 perspectives for this issue

	// Verify each perspective has the correct issue ID
	for _, p := range perspectives {
		assert.Equal(t, testIssueID, p.IssueID)
	}
}