using Eis.Infrastructure.Administration;

namespace Eis.Infrastructure.Tests.Administration;

public sealed class AdminMigrationOptionsTests
{
    [Fact]
    public void DisabledByDefault()
    {
        WithEnvironment(null, null, null, () =>
        {
            var options = AdminMigrationOptions.FromEnvironment(
                configuredNativeReadsEnabled: false,
                authenticationNativeEnabled: false,
                sharesLegacySessions: false);

            Assert.False(options.NativeReadsEnabled);
        });
    }

    [Fact]
    public void RequiresNativeAuthentication()
    {
        WithEnvironment("true", null, "true", () =>
        {
            var exception = Assert.Throws<InvalidOperationException>(() =>
                AdminMigrationOptions.FromEnvironment(
                    configuredNativeReadsEnabled: false,
                    authenticationNativeEnabled: false,
                    sharesLegacySessions: false));

            Assert.Contains("AUTH_NATIVE_ENABLED=true", exception.Message);
        });
    }

    [Fact]
    public void RequiresSharedSessionsOutsideIsolatedTests()
    {
        WithEnvironment("true", null, null, () =>
        {
            var exception = Assert.Throws<InvalidOperationException>(() =>
                AdminMigrationOptions.FromEnvironment(
                    configuredNativeReadsEnabled: false,
                    authenticationNativeEnabled: true,
                    sharesLegacySessions: false));

            Assert.Contains("Redis", exception.Message);
        });
    }

    [Fact]
    public void AllowsSharedRedisSessions()
    {
        WithEnvironment("true", null, null, () =>
        {
            var options = AdminMigrationOptions.FromEnvironment(
                configuredNativeReadsEnabled: false,
                authenticationNativeEnabled: true,
                sharesLegacySessions: true);

            Assert.True(options.NativeReadsEnabled);
        });
    }

    [Fact]
    public void OrganizationWritesRequireNativeReads()
    {
        WithEnvironment("false", "true", null, () =>
        {
            var exception = Assert.Throws<InvalidOperationException>(() =>
                AdminMigrationOptions.FromEnvironment(
                    configuredNativeReadsEnabled: false,
                    authenticationNativeEnabled: true,
                    sharesLegacySessions: true));

            Assert.Contains("ADMIN_NATIVE_READS_ENABLED=true", exception.Message);
        });
    }

    [Fact]
    public void EnablesOrganizationWritesWithReadsAndSharedSessions()
    {
        WithEnvironment("true", "true", null, () =>
        {
            var options = AdminMigrationOptions.FromEnvironment(
                configuredNativeReadsEnabled: false,
                authenticationNativeEnabled: true,
                sharesLegacySessions: true);

            Assert.True(options.NativeReadsEnabled);
            Assert.True(options.NativeOrganizationWritesEnabled);
        });
    }

    [Fact]
    public void EnablesAccountBatchesWithReadsAndSharedSessions()
    {
        WithEnvironment("true", null, null, () =>
        {
            var options = AdminMigrationOptions.FromEnvironment(
                configuredNativeReadsEnabled: false,
                authenticationNativeEnabled: true,
                sharesLegacySessions: true);

            Assert.True(options.NativeReadsEnabled);
            Assert.True(options.NativeAccountBatchesEnabled);
        }, accountBatchesEnabled: "true");
    }

    [Fact]
    public void EnablesAdminConfigurationWithReadsAndSharedSessions()
    {
        WithEnvironment("true", null, null, () =>
        {
            var options = AdminMigrationOptions.FromEnvironment(
                configuredNativeReadsEnabled: false,
                authenticationNativeEnabled: true,
                sharesLegacySessions: true);

            Assert.True(options.NativeReadsEnabled);
            Assert.True(options.NativeConfigurationEnabled);
        }, configurationEnabled: "true");
    }

    [Fact]
    public void EnablesNoticeManagementWithReadsAndSharedSessions()
    {
        WithEnvironment("true", null, null, () =>
        {
            var options = AdminMigrationOptions.FromEnvironment(
                configuredNativeReadsEnabled: false,
                authenticationNativeEnabled: true,
                sharesLegacySessions: true);

            Assert.True(options.NativeReadsEnabled);
            Assert.True(options.NativeNoticeManagementEnabled);
        }, noticeManagementEnabled: "true");
    }

    [Fact]
    public void AcceptsLegacyNoticeWritesEnvironmentVariable()
    {
        WithEnvironment("true", null, null, () =>
        {
            var options = AdminMigrationOptions.FromEnvironment(
                configuredNativeReadsEnabled: false,
                authenticationNativeEnabled: true,
                sharesLegacySessions: true);

            Assert.True(options.NativeNoticeManagementEnabled);
        }, legacyNoticeWritesEnabled: "true");
    }

    [Fact]
    public void EnablesCentersWithReadsAndSharedSessions()
    {
        WithEnvironment("true", null, null, () =>
        {
            var options = AdminMigrationOptions.FromEnvironment(
                configuredNativeReadsEnabled: false,
                authenticationNativeEnabled: true,
                sharesLegacySessions: true);

            Assert.True(options.NativeReadsEnabled);
            Assert.True(options.NativeCentersEnabled);
        }, centersEnabled: "true");
    }

    private static void WithEnvironment(
        string? nativeReadsEnabled,
        string? nativeOrganizationWritesEnabled,
        string? allowMemory,
        Action test,
        string? accountBatchesEnabled = null,
        string? configurationEnabled = null,
        string? noticeManagementEnabled = null,
        string? legacyNoticeWritesEnabled = null,
        string? centersEnabled = null)
    {
        var previousNativeReadsEnabled = Environment.GetEnvironmentVariable("ADMIN_NATIVE_READS_ENABLED");
        var previousNativeOrganizationWritesEnabled = Environment.GetEnvironmentVariable("ADMIN_NATIVE_ORGANIZATION_WRITES_ENABLED");
        var previousAccountBatchesEnabled = Environment.GetEnvironmentVariable("ADMIN_NATIVE_ACCOUNT_BATCHES_ENABLED");
        var previousConfigurationEnabled = Environment.GetEnvironmentVariable("ADMIN_NATIVE_CONFIGURATION_ENABLED");
        var previousNoticeManagementEnabled = Environment.GetEnvironmentVariable("ADMIN_NATIVE_NOTICE_MANAGEMENT_ENABLED");
        var previousLegacyNoticeWritesEnabled = Environment.GetEnvironmentVariable("ADMIN_NATIVE_NOTICE_WRITES_ENABLED");
        var previousCentersEnabled = Environment.GetEnvironmentVariable("ADMIN_NATIVE_CENTERS_ENABLED");
        var previousAllowMemory = Environment.GetEnvironmentVariable("ADMIN_NATIVE_ALLOW_MEMORY");
        try
        {
            Environment.SetEnvironmentVariable("ADMIN_NATIVE_READS_ENABLED", nativeReadsEnabled);
            Environment.SetEnvironmentVariable("ADMIN_NATIVE_ORGANIZATION_WRITES_ENABLED", nativeOrganizationWritesEnabled);
            Environment.SetEnvironmentVariable("ADMIN_NATIVE_ACCOUNT_BATCHES_ENABLED", accountBatchesEnabled);
            Environment.SetEnvironmentVariable("ADMIN_NATIVE_CONFIGURATION_ENABLED", configurationEnabled);
            Environment.SetEnvironmentVariable("ADMIN_NATIVE_NOTICE_MANAGEMENT_ENABLED", noticeManagementEnabled);
            Environment.SetEnvironmentVariable("ADMIN_NATIVE_NOTICE_WRITES_ENABLED", legacyNoticeWritesEnabled);
            Environment.SetEnvironmentVariable("ADMIN_NATIVE_CENTERS_ENABLED", centersEnabled);
            Environment.SetEnvironmentVariable("ADMIN_NATIVE_ALLOW_MEMORY", allowMemory);
            test();
        }
        finally
        {
            Environment.SetEnvironmentVariable("ADMIN_NATIVE_READS_ENABLED", previousNativeReadsEnabled);
            Environment.SetEnvironmentVariable("ADMIN_NATIVE_ORGANIZATION_WRITES_ENABLED", previousNativeOrganizationWritesEnabled);
            Environment.SetEnvironmentVariable("ADMIN_NATIVE_ACCOUNT_BATCHES_ENABLED", previousAccountBatchesEnabled);
            Environment.SetEnvironmentVariable("ADMIN_NATIVE_CONFIGURATION_ENABLED", previousConfigurationEnabled);
            Environment.SetEnvironmentVariable("ADMIN_NATIVE_NOTICE_MANAGEMENT_ENABLED", previousNoticeManagementEnabled);
            Environment.SetEnvironmentVariable("ADMIN_NATIVE_NOTICE_WRITES_ENABLED", previousLegacyNoticeWritesEnabled);
            Environment.SetEnvironmentVariable("ADMIN_NATIVE_CENTERS_ENABLED", previousCentersEnabled);
            Environment.SetEnvironmentVariable("ADMIN_NATIVE_ALLOW_MEMORY", previousAllowMemory);
        }
    }
}