using JobTrackerApi.Data;
using JobTrackerApi.Models;
using JobTrackerApi.Services;
using Microsoft.EntityFrameworkCore;
using Xunit;

namespace JobTrackerApi.MariaDb.Tests;

public sealed class CvBlankPersistenceTests
{
    private const string Owner = "rd21-owner";
    private static CvVariantService Service(JobTrackerContext db) => new(db, new CareerProfileService(db), new ThemedCvRenderer());
    private static CvVariantSettings Blank() => new() { SectionsExplicit = true, IncludeProfileContact = false };

    private static async Task SeedProfile(JobTrackerContext db)
    {
        db.Users.Add(new() { Id = Owner, UserName = "synthetic-cv-blank" });
        await db.SaveChangesAsync();
        await new CareerProfileService(db).SaveVersionAsync(Owner, new()
        {
            Contact = new() { FullName = "Canonical Person", Headline = "Canonical headline", Email = "synthetic@example.test" },
            Summary = { "Canonical summary" },
            Jobs = { new() { Id = "canonical-role", Title = "Canonical role", Company = "Synthetic company", Bullets = { "Canonical evidence" } } },
            Skills = { "Canonical skill" },
        }, "manual", 0, default);
    }

    [Fact]
    public async Task Blank_json_readback_duplicate_design_and_restore_preserve_canonical_profile_on_mariadb()
    {
        await using var database = await MariaDbDatabase.CreateAsync();
        int id;
        string initialJson;
        string canonicalJson;
        string? identityJson;
        await using (var seed = database.Context())
        {
            await SeedProfile(seed);
            canonicalJson = (await seed.CareerProfiles.SingleAsync()).ProfileJson;
            identityJson = (await seed.Users.SingleAsync()).ProfileCvStructureJson;
            var created = await Service(seed).CreateAsync(Owner, "Blank", null, Blank(), default);
            id = created.Id;
            initialJson = created.SettingsJson;
        }

        int copyId;
        await using (var edit = database.Context())
        {
            var service = Service(edit);
            var read = (await service.GetAsync(Owner, id, default))!;
            Assert.Equal(initialJson, read.SettingsJson);
            var settings = CvVariantSettingsJson.Deserialize(read.SettingsJson);
            Assert.True(settings.SectionsExplicit);
            Assert.False(settings.IncludeProfileContact);
            Assert.Empty(settings.Sections);
            var rendered = await service.RenderAsync(Owner, id, new("Fallback identity", "data:image/png;base64,AA=="), default, 1);
            Assert.False(rendered!.HasContent);
            Assert.DoesNotContain("Canonical", rendered.Html);
            Assert.DoesNotContain("Fallback identity", rendered.Html);

            var copy = (await service.DuplicateAsync(Owner, id, "Blank copy", default))!;
            copyId = copy.Id;
            Assert.Equal(initialJson, copy.SettingsJson);
            settings.ThemeId = "minimal";
            settings.AccentColor = "#123456";
            await service.SaveAsync(Owner, id, null, settings, "manual", 1, default);
        }

        await using (var reopen = database.Context())
        {
            var service = Service(reopen);
            var settings = CvVariantSettingsJson.Deserialize((await service.GetAsync(Owner, id, default))!.SettingsJson);
            Assert.Equal("minimal", settings.ThemeId);
            Assert.True(settings.SectionsExplicit);
            Assert.False(settings.IncludeProfileContact);
            Assert.False((await service.RenderAsync(Owner, id, new("Fallback", null), default, 2))!.HasContent);
            settings.Headline = "Authored CV-only headline";
            await service.SaveAsync(Owner, id, null, settings, "manual", 2, default);
            var restored = (await service.RestoreVersionAsync(Owner, id, 1, 3, default))!;
            Assert.Equal(4, restored.Version);
            Assert.Equal(initialJson, restored.SettingsJson);
        }

        await using var verify = database.Context();
        Assert.Equal(initialJson, (await verify.CvVariants.SingleAsync(cv => cv.Id == id)).SettingsJson);
        Assert.Equal(initialJson, (await verify.CvVariants.SingleAsync(cv => cv.Id == copyId)).SettingsJson);
        Assert.Equal(new[] { 1, 2, 3, 4 }, await verify.CvVariantVersions.Where(row => row.CvVariantId == id).OrderBy(row => row.Version).Select(row => row.Version).ToArrayAsync());
        Assert.Single(await verify.CvVariantVersions.Where(row => row.CvVariantId == copyId).ToListAsync());
        Assert.Equal(canonicalJson, (await verify.CareerProfiles.SingleAsync()).ProfileJson);
        Assert.Equal(identityJson, (await verify.Users.SingleAsync()).ProfileCvStructureJson);
        Assert.Equal(1, (await verify.CareerProfiles.SingleAsync()).Version);
        Assert.Single(await verify.CareerProfileVersions.ToListAsync());
        Assert.Equal("Canonical role", (await verify.CareerExperiences.SingleAsync()).Title);
        var profile = await new CareerProfileService(verify).LoadStructuredAsync(Owner, default);
        Assert.Equal("Canonical summary", Assert.Single(profile.Summary));
        Assert.Equal("Canonical skill", Assert.Single(profile.Skills));
        Assert.Equal("Canonical evidence", Assert.Single(Assert.Single(profile.Jobs).Bullets));
    }

    [Fact]
    public async Task Competing_blank_edits_and_foreign_access_cannot_overwrite_winner_or_append_history_on_mariadb()
    {
        await using var database = await MariaDbDatabase.CreateAsync();
        int id;
        await using (var seed = database.Context())
        {
            await SeedProfile(seed);
            id = (await Service(seed).CreateAsync(Owner, "Blank", null, Blank(), default)).Id;
        }
        await using var winner = database.Context();
        await using var staleSave = database.Context();
        await using var staleRestore = database.Context();
        Assert.Equal(1, (await Service(staleSave).GetAsync(Owner, id, default))!.Version);
        Assert.Equal(1, (await Service(staleRestore).GetAsync(Owner, id, default))!.Version);
        var settings = Blank();
        settings.ThemeId = "minimal";
        settings.Headline = "Acknowledged CV-only winner";
        await Service(winner).SaveAsync(Owner, id, "Winner", settings, "manual", 1, default);
        await Assert.ThrowsAsync<DbUpdateConcurrencyException>(() => Service(staleSave).SaveAsync(Owner, id, "Stale name", Blank(), "autosave", 1, default));
        await Assert.ThrowsAsync<DbUpdateConcurrencyException>(() => Service(staleRestore).RestoreVersionAsync(Owner, id, 1, 1, default));

        await using (var foreign = database.Context("foreign"))
        {
            var service = Service(foreign);
            Assert.Null(await service.GetAsync("foreign", id, default));
            Assert.Null(await service.SaveAsync("foreign", id, "Foreign", Blank(), "manual", 2, default));
            Assert.Null(await service.DuplicateAsync("foreign", id, null, default));
            Assert.Null(await service.RestoreVersionAsync("foreign", id, 1, 2, default));
            Assert.Null(await service.RenderAsync("foreign", id, new("Foreign", null), default, 2));
            Assert.Empty(await service.ListVersionsAsync("foreign", id, default));
        }

        await using var verify = database.Context();
        var saved = await verify.CvVariants.SingleAsync();
        Assert.Equal(2, saved.Version);
        Assert.Equal("Winner", saved.Name);
        Assert.Equal(CvVariantSettingsJson.Serialize(settings), saved.SettingsJson);
        var history = await verify.CvVariantVersions.OrderBy(row => row.Version).ToListAsync();
        Assert.Equal(new[] { 1, 2 }, history.Select(row => row.Version));
        Assert.Equal(CvVariantSettingsJson.Serialize(Blank()), history[0].SettingsJson);
        Assert.Equal(saved.SettingsJson, history[1].SettingsJson);
        Assert.Equal(1, (await verify.CareerProfiles.SingleAsync()).Version);
        Assert.Single(await verify.CareerProfileVersions.ToListAsync());
        Assert.Equal("Canonical role", (await verify.CareerExperiences.SingleAsync()).Title);
    }
}