using System.Security.Claims;
using JobTrackerApi.Controllers;
using JobTrackerApi.Data;
using JobTrackerApi.Models;
using JobTrackerApi.Services;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Data.Sqlite;
using Microsoft.EntityFrameworkCore;
using Moq;
using Xunit;

namespace JobTrackerApi.Tests;

public sealed class CompanyCreateCompatibilityTests
{
    [Fact]
    public async Task Exact_Norwegian_name_reuses_owned_company_without_overwriting_existing_fields()
    {
        await using var fixture = await Fixture.CreateAsync();
        var existing = new Company { OwnerUserId = "owner-a", Name = "Ærlig Økonomi Ås", Location = "Original location", Source = "Finn", RecruiterEmail = "retained@example.test" };
        fixture.Db.Companies.Add(existing);
        await fixture.Db.SaveChangesAsync();

        var result = await fixture.Controller.Create(new("  Ærlig Økonomi Ås  ", "Imported location", "LinkedIn"), default);

        var company = Assert.IsType<Company>(Assert.IsType<OkObjectResult>(result.Result).Value);
        Assert.Equal(existing.Id, company.Id);
        Assert.Equal("owner-a", company.OwnerUserId);
        Assert.Equal("Ærlig Økonomi Ås", company.Name);
        Assert.Equal("Original location", company.Location);
        Assert.Equal("Finn", company.Source);
        Assert.Equal("retained@example.test", company.RecruiterEmail);
        Assert.Equal(1, await fixture.Db.Companies.IgnoreQueryFilters().CountAsync());
    }

    [Fact]
    public async Task Ascii_case_insensitive_reuse_and_trimmed_input_remain_compatible()
    {
        await using var fixture = await Fixture.CreateAsync();
        var existing = new Company { OwnerUserId = "owner-a", Name = "Northwind AS", Location = "Original location", Source = "Finn" };
        fixture.Db.Companies.Add(existing);
        await fixture.Db.SaveChangesAsync();

        var result = await fixture.Controller.Create(new("  nORTHWIND aS  ", "Another location", "LinkedIn"), default);

        var company = Assert.IsType<Company>(Assert.IsType<OkObjectResult>(result.Result).Value);
        Assert.Equal(existing.Id, company.Id);
        Assert.Equal("Northwind AS", company.Name);
        Assert.Equal("Original location", company.Location);
        Assert.Equal("Finn", company.Source);
        Assert.Equal(1, await fixture.Db.Companies.CountAsync());
    }

    [Fact]
    public async Task An_identical_foreign_name_creates_a_separate_owned_company_and_preserves_source_normalization()
    {
        await using var fixture = await Fixture.CreateAsync();
        var foreign = new Company { OwnerUserId = "owner-b", Name = "Ærlig AS", Location = "Private location", Source = "Private source", RecruiterEmail = "private@example.test" };
        fixture.Db.Companies.Add(foreign);
        await fixture.Db.SaveChangesAsync();

        var result = await fixture.Controller.Create(new("  Ærlig AS  ", "  Bergen  ", "https://www.nav.no/jobs"), default);

        var company = Assert.IsType<Company>(Assert.IsType<CreatedAtActionResult>(result.Result).Value);
        Assert.NotEqual(foreign.Id, company.Id);
        Assert.Equal("owner-a", company.OwnerUserId);
        Assert.Equal("Ærlig AS", company.Name);
        Assert.Equal("Bergen", company.Location);
        Assert.Equal("NAV", company.Source);
        Assert.Null(company.RecruiterEmail);
        Assert.Equal(1, await fixture.Db.Companies.CountAsync());
        Assert.Equal(2, await fixture.Db.Companies.IgnoreQueryFilters().CountAsync());
        var retained = await fixture.Db.Companies.IgnoreQueryFilters().AsNoTracking().SingleAsync(value => value.Id == foreign.Id);
        Assert.Equal("owner-b", retained.OwnerUserId);
        Assert.Equal("Private location", retained.Location);
        Assert.Equal("Private source", retained.Source);
        Assert.Equal("private@example.test", retained.RecruiterEmail);
    }

    private sealed class Fixture(SqliteConnection connection, JobTrackerContext db) : IAsyncDisposable
    {
        public JobTrackerContext Db { get; } = db;
        public CompaniesController Controller { get; } = new(db)
        {
            ControllerContext = new ControllerContext
            {
                HttpContext = new DefaultHttpContext
                {
                    User = new ClaimsPrincipal(new ClaimsIdentity([new Claim(ClaimTypes.NameIdentifier, "owner-a")], "test")),
                },
            },
        };

        public static async Task<Fixture> CreateAsync()
        {
            var connection = new SqliteConnection("Data Source=:memory:");
            await connection.OpenAsync();
            var currentUser = new Mock<ICurrentUserService>();
            currentUser.SetupGet(value => value.UserId).Returns("owner-a");
            var db = new JobTrackerContext(new DbContextOptionsBuilder<JobTrackerContext>().UseSqlite(connection).Options, currentUser.Object);
            await db.Database.EnsureCreatedAsync();
            return new Fixture(connection, db);
        }

        public async ValueTask DisposeAsync()
        {
            await Db.DisposeAsync();
            await connection.DisposeAsync();
        }
    }
}