using SharepointToolbox.Core.Models;
using SharepointToolbox.Services;

namespace SharepointToolbox.Tests.Services;

public class FolderStructureServiceTests
{
    [Fact]
    public void FolderStructureService_Implements_IFolderStructureService()
    {
        Assert.True(typeof(IFolderStructureService).IsAssignableFrom(typeof(FolderStructureService)));
    }

    [Fact]
    public void BuildUniquePaths_FromExampleCsv_ReturnsParentFirst()
    {
        var rows = new List<FolderStructureRow>
        {
            new() { Level1 = "Administration", Level2 = "Comptabilite", Level3 = "Factures" },
            new() { Level1 = "Administration", Level2 = "Comptabilite", Level3 = "Bilans" },
            new() { Level1 = "Administration", Level2 = "Ressources Humaines" },
            new() { Level1 = "Projets", Level2 = "Projet Alpha", Level3 = "Documents" },
        };

        var paths = FolderStructureService.BuildUniquePaths(rows);

        // Should contain unique paths, parent-first
        Assert.Contains("Administration", paths);
        Assert.Contains("Administration/Comptabilite", paths);
        Assert.Contains("Administration/Comptabilite/Factures", paths);
        Assert.Contains("Administration/Comptabilite/Bilans", paths);
        Assert.Contains("Projets", paths);
        Assert.Contains("Projets/Projet Alpha", paths);

        // Parent-first: "Administration" before "Administration/Comptabilite"
        var adminIdx = paths.ToList().IndexOf("Administration");
        var compIdx = paths.ToList().IndexOf("Administration/Comptabilite");
        Assert.True(adminIdx < compIdx);
    }

    [Fact]
    public void BuildUniquePaths_DuplicateRows_Deduplicated()
    {
        var rows = new List<FolderStructureRow>
        {
            new() { Level1 = "A", Level2 = "B" },
            new() { Level1 = "A", Level2 = "B" },
            new() { Level1 = "A", Level2 = "C" },
        };

        var paths = FolderStructureService.BuildUniquePaths(rows);

        Assert.Equal(3, paths.Count); // A, A/B, A/C (deduplicated)
    }

    [Fact]
    public void BuildUniquePaths_EmptyLevels_StopsAtLastNonEmpty()
    {
        var rows = new List<FolderStructureRow>
        {
            new() { Level1 = "Root", Level2 = "", Level3 = "", Level4 = "" },
        };

        var paths = FolderStructureService.BuildUniquePaths(rows);

        Assert.Single(paths);
        Assert.Equal("Root", paths[0]);
    }

    [Fact]
    public void FolderStructureRow_BuildPath_ReturnsCorrectPath()
    {
        var row = new FolderStructureRow
        {
            Level1 = "Admin",
            Level2 = "HR",
            Level3 = "Contracts",
            Level4 = ""
        };

        Assert.Equal("Admin/HR/Contracts", row.BuildPath());
    }

    [Fact(Skip = "Requires live SharePoint tenant")]
    public async Task CreateFoldersAsync_ValidRows_CreatesFolders()
    {
        await Task.CompletedTask;
    }
}