package main

import (
	"context"
	"testing"

	"github.com/99designs/gqlgen/graphql/handler/transport"
	"github.com/google/uuid"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"gitlab.com/unboundsoftware/eventsourced/eventsourced"

	"gitea.unbound.se/unboundsoftware/schemas/domain"
	"gitea.unbound.se/unboundsoftware/schemas/hash"
	"gitea.unbound.se/unboundsoftware/schemas/middleware"
)

// MockCache is a mock implementation for testing
type MockCache struct {
	organizations map[string]*domain.Organization // keyed by orgId-name composite
	apiKeys       map[string]string               // maps orgId-name to hashed key
}

func (m *MockCache) OrganizationByAPIKey(plainKey string) *domain.Organization {
	// Find organization by comparing plaintext key with stored hash
	for compositeKey, hashedKey := range m.apiKeys {
		if hash.CompareAPIKey(hashedKey, plainKey) {
			return m.organizations[compositeKey]
		}
	}
	return nil
}

func TestWebSocketInitFunc_WithValidAPIKey(t *testing.T) {
	// Setup
	orgID := uuid.New()
	org := &domain.Organization{
		BaseAggregate: eventsourced.BaseAggregate{
			ID: eventsourced.IdFromString(orgID.String()),
		},
		Name: "Test Organization",
	}

	apiKey := "test-api-key-123"
	hashedKey, err := hash.APIKey(apiKey)
	require.NoError(t, err)

	compositeKey := orgID.String() + "-test-key"

	mockCache := &MockCache{
		organizations: map[string]*domain.Organization{
			compositeKey: org,
		},
		apiKeys: map[string]string{
			compositeKey: hashedKey,
		},
	}

	// Create InitFunc (simulating the WebSocket InitFunc logic)
	initFunc := func(ctx context.Context, initPayload transport.InitPayload) (context.Context, *transport.InitPayload, error) {
		// Extract API key from WebSocket connection_init payload
		if apiKey, ok := initPayload["X-Api-Key"].(string); ok && apiKey != "" {
			ctx = context.WithValue(ctx, middleware.ApiKey, apiKey)

			// Look up organization by API key (cache handles hash comparison)
			if organization := mockCache.OrganizationByAPIKey(apiKey); organization != nil {
				ctx = context.WithValue(ctx, middleware.OrganizationKey, *organization)
			}
		}
		return ctx, &initPayload, nil
	}

	// Test
	ctx := context.Background()
	initPayload := transport.InitPayload{
		"X-Api-Key": apiKey,
	}

	resultCtx, resultPayload, err := initFunc(ctx, initPayload)

	// Assert
	require.NoError(t, err)
	require.NotNil(t, resultPayload)

	// Check API key is in context
	if value := resultCtx.Value(middleware.ApiKey); value != nil {
		assert.Equal(t, apiKey, value.(string))
	} else {
		t.Fatal("API key not found in context")
	}

	// Check organization is in context
	if value := resultCtx.Value(middleware.OrganizationKey); value != nil {
		capturedOrg, ok := value.(domain.Organization)
		require.True(t, ok, "Organization should be of correct type")
		assert.Equal(t, org.Name, capturedOrg.Name)
		assert.Equal(t, org.ID.String(), capturedOrg.ID.String())
	} else {
		t.Fatal("Organization not found in context")
	}
}

func TestWebSocketInitFunc_WithInvalidAPIKey(t *testing.T) {
	// Setup
	mockCache := &MockCache{
		organizations: map[string]*domain.Organization{},
		apiKeys:       map[string]string{},
	}

	apiKey := "invalid-api-key"

	// Create InitFunc
	initFunc := func(ctx context.Context, initPayload transport.InitPayload) (context.Context, *transport.InitPayload, error) {
		// Extract API key from WebSocket connection_init payload
		if apiKey, ok := initPayload["X-Api-Key"].(string); ok && apiKey != "" {
			ctx = context.WithValue(ctx, middleware.ApiKey, apiKey)

			// Look up organization by API key (cache handles hash comparison)
			if organization := mockCache.OrganizationByAPIKey(apiKey); organization != nil {
				ctx = context.WithValue(ctx, middleware.OrganizationKey, *organization)
			}
		}
		return ctx, &initPayload, nil
	}

	// Test
	ctx := context.Background()
	initPayload := transport.InitPayload{
		"X-Api-Key": apiKey,
	}

	resultCtx, resultPayload, err := initFunc(ctx, initPayload)

	// Assert
	require.NoError(t, err)
	require.NotNil(t, resultPayload)

	// Check API key is in context
	if value := resultCtx.Value(middleware.ApiKey); value != nil {
		assert.Equal(t, apiKey, value.(string))
	} else {
		t.Fatal("API key not found in context")
	}

	// Check organization is NOT in context (since API key is invalid)
	value := resultCtx.Value(middleware.OrganizationKey)
	assert.Nil(t, value, "Organization should not be set for invalid API key")
}

func TestWebSocketInitFunc_WithoutAPIKey(t *testing.T) {
	// Setup
	mockCache := &MockCache{
		organizations: map[string]*domain.Organization{},
		apiKeys:       map[string]string{},
	}

	// Create InitFunc
	initFunc := func(ctx context.Context, initPayload transport.InitPayload) (context.Context, *transport.InitPayload, error) {
		// Extract API key from WebSocket connection_init payload
		if apiKey, ok := initPayload["X-Api-Key"].(string); ok && apiKey != "" {
			ctx = context.WithValue(ctx, middleware.ApiKey, apiKey)

			// Look up organization by API key (cache handles hash comparison)
			if organization := mockCache.OrganizationByAPIKey(apiKey); organization != nil {
				ctx = context.WithValue(ctx, middleware.OrganizationKey, *organization)
			}
		}
		return ctx, &initPayload, nil
	}

	// Test
	ctx := context.Background()
	initPayload := transport.InitPayload{}

	resultCtx, resultPayload, err := initFunc(ctx, initPayload)

	// Assert
	require.NoError(t, err)
	require.NotNil(t, resultPayload)

	// Check API key is NOT in context
	value := resultCtx.Value(middleware.ApiKey)
	assert.Nil(t, value, "API key should not be set when not provided")

	// Check organization is NOT in context
	value = resultCtx.Value(middleware.OrganizationKey)
	assert.Nil(t, value, "Organization should not be set when API key is not provided")
}

func TestWebSocketInitFunc_WithEmptyAPIKey(t *testing.T) {
	// Setup
	mockCache := &MockCache{
		organizations: map[string]*domain.Organization{},
		apiKeys:       map[string]string{},
	}

	// Create InitFunc
	initFunc := func(ctx context.Context, initPayload transport.InitPayload) (context.Context, *transport.InitPayload, error) {
		// Extract API key from WebSocket connection_init payload
		if apiKey, ok := initPayload["X-Api-Key"].(string); ok && apiKey != "" {
			ctx = context.WithValue(ctx, middleware.ApiKey, apiKey)

			// Look up organization by API key (cache handles hash comparison)
			if organization := mockCache.OrganizationByAPIKey(apiKey); organization != nil {
				ctx = context.WithValue(ctx, middleware.OrganizationKey, *organization)
			}
		}
		return ctx, &initPayload, nil
	}

	// Test
	ctx := context.Background()
	initPayload := transport.InitPayload{
		"X-Api-Key": "", // Empty string
	}

	resultCtx, resultPayload, err := initFunc(ctx, initPayload)

	// Assert
	require.NoError(t, err)
	require.NotNil(t, resultPayload)

	// Check API key is NOT in context (because empty string fails the condition)
	value := resultCtx.Value(middleware.ApiKey)
	assert.Nil(t, value, "API key should not be set when empty")

	// Check organization is NOT in context
	value = resultCtx.Value(middleware.OrganizationKey)
	assert.Nil(t, value, "Organization should not be set when API key is empty")
}

func TestWebSocketInitFunc_WithWrongTypeAPIKey(t *testing.T) {
	// Setup
	mockCache := &MockCache{
		organizations: map[string]*domain.Organization{},
		apiKeys:       map[string]string{},
	}

	// Create InitFunc
	initFunc := func(ctx context.Context, initPayload transport.InitPayload) (context.Context, *transport.InitPayload, error) {
		// Extract API key from WebSocket connection_init payload
		if apiKey, ok := initPayload["X-Api-Key"].(string); ok && apiKey != "" {
			ctx = context.WithValue(ctx, middleware.ApiKey, apiKey)

			// Look up organization by API key (cache handles hash comparison)
			if organization := mockCache.OrganizationByAPIKey(apiKey); organization != nil {
				ctx = context.WithValue(ctx, middleware.OrganizationKey, *organization)
			}
		}
		return ctx, &initPayload, nil
	}

	// Test
	ctx := context.Background()
	initPayload := transport.InitPayload{
		"X-Api-Key": 12345, // Wrong type (int instead of string)
	}

	resultCtx, resultPayload, err := initFunc(ctx, initPayload)

	// Assert
	require.NoError(t, err)
	require.NotNil(t, resultPayload)

	// Check API key is NOT in context (type assertion fails)
	value := resultCtx.Value(middleware.ApiKey)
	assert.Nil(t, value, "API key should not be set when wrong type")

	// Check organization is NOT in context
	value = resultCtx.Value(middleware.OrganizationKey)
	assert.Nil(t, value, "Organization should not be set when API key has wrong type")
}

func TestWebSocketInitFunc_WithMultipleOrganizations(t *testing.T) {
	// Setup - create multiple organizations
	org1ID := uuid.New()
	org1 := &domain.Organization{
		BaseAggregate: eventsourced.BaseAggregate{
			ID: eventsourced.IdFromString(org1ID.String()),
		},
		Name: "Organization 1",
	}

	org2ID := uuid.New()
	org2 := &domain.Organization{
		BaseAggregate: eventsourced.BaseAggregate{
			ID: eventsourced.IdFromString(org2ID.String()),
		},
		Name: "Organization 2",
	}

	apiKey1 := "api-key-org-1"
	apiKey2 := "api-key-org-2"
	hashedKey1, err := hash.APIKey(apiKey1)
	require.NoError(t, err)
	hashedKey2, err := hash.APIKey(apiKey2)
	require.NoError(t, err)

	compositeKey1 := org1ID.String() + "-key1"
	compositeKey2 := org2ID.String() + "-key2"

	mockCache := &MockCache{
		organizations: map[string]*domain.Organization{
			compositeKey1: org1,
			compositeKey2: org2,
		},
		apiKeys: map[string]string{
			compositeKey1: hashedKey1,
			compositeKey2: hashedKey2,
		},
	}

	// Create InitFunc
	initFunc := func(ctx context.Context, initPayload transport.InitPayload) (context.Context, *transport.InitPayload, error) {
		// Extract API key from WebSocket connection_init payload
		if apiKey, ok := initPayload["X-Api-Key"].(string); ok && apiKey != "" {
			ctx = context.WithValue(ctx, middleware.ApiKey, apiKey)

			// Look up organization by API key (cache handles hash comparison)
			if organization := mockCache.OrganizationByAPIKey(apiKey); organization != nil {
				ctx = context.WithValue(ctx, middleware.OrganizationKey, *organization)
			}
		}
		return ctx, &initPayload, nil
	}

	// Test with first API key
	ctx1 := context.Background()
	initPayload1 := transport.InitPayload{
		"X-Api-Key": apiKey1,
	}

	resultCtx1, _, err := initFunc(ctx1, initPayload1)
	require.NoError(t, err)

	if value := resultCtx1.Value(middleware.OrganizationKey); value != nil {
		capturedOrg, ok := value.(domain.Organization)
		require.True(t, ok)
		assert.Equal(t, org1.Name, capturedOrg.Name)
		assert.Equal(t, org1.ID.String(), capturedOrg.ID.String())
	} else {
		t.Fatal("Organization 1 not found in context")
	}

	// Test with second API key
	ctx2 := context.Background()
	initPayload2 := transport.InitPayload{
		"X-Api-Key": apiKey2,
	}

	resultCtx2, _, err := initFunc(ctx2, initPayload2)
	require.NoError(t, err)

	if value := resultCtx2.Value(middleware.OrganizationKey); value != nil {
		capturedOrg, ok := value.(domain.Organization)
		require.True(t, ok)
		assert.Equal(t, org2.Name, capturedOrg.Name)
		assert.Equal(t, org2.ID.String(), capturedOrg.ID.String())
	} else {
		t.Fatal("Organization 2 not found in context")
	}
}