using Microsoft.Extensions.Logging.Abstractions;
using Microsoft.Extensions.Options;
using Novelly.Api.Agent;
using Novelly.Api.Chapters;
using Novelly.Api.Characters;
using Novelly.Api.Projects;
using Novelly.Api.Scenes;

namespace Novelly.Api.Tests;

/// <summary>
/// Covers the list endpoints, which sort and aggregate in SQL rather than in memory.
/// SQLite is fussier than the in-memory provider about what it will translate — ordering
/// by a DateTimeOffset, for one — so these have to run against real SQLite to be worth anything.
/// </summary>
[TestFixture]
public class ListingTests : ServiceTestFixture
{
    [Test]
    public async Task Projects_are_listed_most_recently_updated_first()
    {
        var older = await Projects.CreateAsync(new CreateProjectRequest("Older Book"));
        var newer = await Projects.CreateAsync(new CreateProjectRequest("Newer Book"));

        // Touching the older project should float it to the top.
        await Projects.UpdateAsync(older.Id, new UpdateProjectRequest(Logline: "Revised."));

        var listed = await Projects.ListAsync();

        Assert.Multiple(() =>
        {
            Assert.That(listed.Select(p => p.Title), Is.EqualTo(new[] { "Older Book", "Newer Book" }));
            Assert.That(listed.Select(p => p.Id), Does.Contain(newer.Id));
        });
    }

    [Test]
    public async Task Project_summaries_aggregate_counts_and_words_across_chapters()
    {
        var project = await Projects.CreateAsync(new CreateProjectRequest("The Salt Road"));
        await Characters.CreateAsync(project.Id, new CreateCharacterRequest("Ines"));
        await Characters.CreateAsync(project.Id, new CreateCharacterRequest("Mara"));

        var first = await Chapters.CreateAsync(project.Id, new CreateChapterRequest("Landfall"));
        var second = await Chapters.CreateAsync(project.Id, new CreateChapterRequest("The Harbour"));
        await Scenes.CreateAsync(first.Id, new CreateSceneRequest("Dawn", Prose: "One two three"));
        await Scenes.CreateAsync(second.Id, new CreateSceneRequest("Dusk", Prose: "Four five"));

        var summary = (await Projects.ListAsync()).Single();

        Assert.Multiple(() =>
        {
            Assert.That(summary.CharacterCount, Is.EqualTo(2));
            Assert.That(summary.ChapterCount, Is.EqualTo(2));
            Assert.That(summary.WordCount, Is.EqualTo(5));
        });
    }

    [Test]
    public async Task A_project_with_no_chapters_reports_zero_words_rather_than_failing()
    {
        await Projects.CreateAsync(new CreateProjectRequest("Empty"));

        var summary = (await Projects.ListAsync()).Single();

        Assert.Multiple(() =>
        {
            Assert.That(summary.WordCount, Is.EqualTo(0));
            Assert.That(summary.ChapterCount, Is.EqualTo(0));
        });
    }

    [Test]
    public async Task Chapters_are_listed_in_manuscript_order_with_scene_totals()
    {
        var project = await Projects.CreateAsync(new CreateProjectRequest("The Salt Road"));
        var second = await Chapters.CreateAsync(project.Id, new CreateChapterRequest("Second", Number: 2));
        var first = await Chapters.CreateAsync(project.Id, new CreateChapterRequest("First", Number: 1));
        await Scenes.CreateAsync(second.Id, new CreateSceneRequest("A", Prose: "One two"));
        await Scenes.CreateAsync(second.Id, new CreateSceneRequest("B", Prose: "Three"));

        var listed = await Chapters.ListAsync(project.Id);

        Assert.Multiple(() =>
        {
            Assert.That(listed.Select(c => c.Title), Is.EqualTo(new[] { "First", "Second" }));
            Assert.That(listed.Single(c => c.Id == second.Id).SceneCount, Is.EqualTo(2));
            Assert.That(listed.Single(c => c.Id == second.Id).WordCount, Is.EqualTo(3));
            Assert.That(listed.Single(c => c.Id == first.Id).WordCount, Is.EqualTo(0));
        });
    }

    [Test]
    public async Task Conversations_are_listed_most_recently_updated_first()
    {
        var project = await Projects.CreateAsync(new CreateProjectRequest("The Salt Road"));
        var agent = new NovelAgentService(
            Db.Context,
            new ScriptedModelClient([[new AgentTextBlock("Reply.")]]),
            new NovelAgentToolset(Projects, Characters, Chapters, Beats, Scenes, Tags),
            Options.Create(new AgentOptions()),
            NullLogger<NovelAgentService>.Instance);

        await agent.SendMessageAsync(project.Id, new SendAgentMessageRequest("First question."));
        await agent.SendMessageAsync(project.Id, new SendAgentMessageRequest("Second question."));

        var listed = await agent.ListConversationsAsync(project.Id);

        Assert.Multiple(() =>
        {
            Assert.That(listed, Has.Count.EqualTo(2));
            Assert.That(listed[0].Title, Is.EqualTo("Second question."));
            Assert.That(listed[0].MessageCount, Is.EqualTo(2));
        });
    }

    [Test]
    public async Task Characters_are_listed_by_role_then_name()
    {
        var project = await Projects.CreateAsync(new CreateProjectRequest("The Salt Road"));
        await Characters.CreateAsync(project.Id, new CreateCharacterRequest("Zeno", CharacterRole.Supporting));
        await Characters.CreateAsync(project.Id, new CreateCharacterRequest("Ines", CharacterRole.Protagonist));
        await Characters.CreateAsync(project.Id, new CreateCharacterRequest("Anders", CharacterRole.Supporting));

        var listed = await Characters.ListAsync(project.Id);

        Assert.That(listed.Select(c => c.Name), Is.EqualTo(new[] { "Ines", "Anders", "Zeno" }));
    }
}