using System;
using System.Text.Json.Nodes;

namespace StellaOps.Notify.Models.Tests;

public sealed class NotifySchemaMigrationTests
{
    [Fact]
    public void UpgradeRuleAddsSchemaVersionWhenMissing()
    {
        var json = JsonNode.Parse(
            """
            {
              "ruleId": "rule-legacy",
              "tenantId": "tenant-1",
              "name": "legacy",
              "enabled": true,
              "match": { "eventKinds": ["scanner.report.ready"] },
              "actions": [ { "actionId": "send", "channel": "email:legacy", "enabled": true } ],
              "createdAt": "2025-10-18T00:00:00Z",
              "updatedAt": "2025-10-18T00:00:00Z"
            }
            """)!;

        var rule = NotifySchemaMigration.UpgradeRule(json);

        Assert.Equal(NotifySchemaVersions.Rule, rule.SchemaVersion);
        Assert.Equal("rule-legacy", rule.RuleId);
    }

    [Fact]
    public void UpgradeRuleThrowsOnUnknownSchema()
    {
        var json = JsonNode.Parse(
            """
            {
              "schemaVersion": "notify.rule@2",
              "ruleId": "rule-future",
              "tenantId": "tenant-1",
              "name": "future",
              "enabled": true,
              "match": { "eventKinds": ["scanner.report.ready"] },
              "actions": [ { "actionId": "send", "channel": "email:soc", "enabled": true } ],
              "createdAt": "2025-10-18T00:00:00Z",
              "updatedAt": "2025-10-18T00:00:00Z"
            }
            """)!;

        var exception = Assert.Throws<NotSupportedException>(() => NotifySchemaMigration.UpgradeRule(json));
        Assert.Contains("notify rule schema version", exception.Message, StringComparison.Ordinal);
    }

    [Fact]
    public void UpgradeChannelDefaultsMissingVersion()
    {
        var json = JsonNode.Parse(
            """
            {
              "channelId": "channel-email",
              "tenantId": "tenant-1",
              "name": "email:soc",
              "type": "email",
              "config": { "secretRef": "ref://notify/channels/email/soc" },
              "enabled": true,
              "createdAt": "2025-10-18T00:00:00Z",
              "updatedAt": "2025-10-18T00:00:00Z"
            }
            """)!;

        var channel = NotifySchemaMigration.UpgradeChannel(json);

        Assert.Equal(NotifySchemaVersions.Channel, channel.SchemaVersion);
        Assert.Equal("channel-email", channel.ChannelId);
    }

    [Fact]
    public void UpgradeTemplateDefaultsMissingVersion()
    {
        var json = JsonNode.Parse(
            """
            {
              "templateId": "tmpl-slack-concise",
              "tenantId": "tenant-1",
              "channelType": "slack",
              "key": "concise",
              "locale": "en-us",
              "body": "{{summary}}",
              "renderMode": "markdown",
              "format": "slack",
              "createdAt": "2025-10-18T00:00:00Z",
              "updatedAt": "2025-10-18T00:00:00Z"
            }
            """)!;

        var template = NotifySchemaMigration.UpgradeTemplate(json);

        Assert.Equal(NotifySchemaVersions.Template, template.SchemaVersion);
        Assert.Equal("tmpl-slack-concise", template.TemplateId);
    }

}