using ControlPlane.Api.Services;
using ControlPlane.Core.Models;

namespace ControlPlane.Api.Endpoints;

public static class GiteaEndpoints
{
    public static IEndpointRouteBuilder MapGiteaEndpoints(this IEndpointRouteBuilder app)
    {
        var g = app.MapGroup("/api/gitea").WithTags("Gitea");

        g.MapGet ("/repo",             GetRepo);
        g.MapGet ("/branches",         ListBranches);
        g.MapPost("/branches",         CreateBranch);
        g.MapGet ("/pulls",            ListPulls);
        g.MapGet ("/pulls/{number:long}", GetPull);
        g.MapPost("/pulls",            CreatePull);
        g.MapGet ("/tags",             ListTags);
        g.MapPost("/tags",             CreateTag);
        g.MapGet ("/webhooks",         ListWebhooks);
        g.MapPost("/webhooks",         RegisterWebhook);

        return app;
    }

    private static async Task<IResult> GetRepo(GiteaService svc, string? repo, CancellationToken ct)
    {
        var result = await svc.GetRepoAsync(repo, ct);
        return result is null ? Results.StatusCode(503) : Results.Ok(result);
    }

    private static async Task<IResult> ListBranches(GiteaService svc, string? repo, CancellationToken ct)
    {
        // repo=all returns branches from all registered repos, each tagged with repoKey
        if (repo == "all")
        {
            var all = await svc.ListAllBranchesAsync(ct);
            return Results.Ok(all.Select(x => new { repoKey = x.RepoKey, x.Branch.Name, x.Branch.CommitSha, x.Branch.Protected }));
        }
        return Results.Ok(await svc.ListBranchesAsync(repo, ct));
    }

    private static async Task<IResult> CreateBranch(
        CreateBranchRequest req, GiteaService svc, CancellationToken ct)
    {
        var branch = await svc.CreateBranchAsync(req, ct);
        return branch is null ? Results.BadRequest("Failed to create branch in Gitea.") : Results.Ok(branch);
    }

    private static async Task<IResult> ListPulls(
        GiteaService svc, string state = "open", string? repo = null, CancellationToken ct = default) =>
        Results.Ok(await svc.ListPullRequestsAsync(state, repo, ct));

    private static async Task<IResult> GetPull(
        long number, GiteaService svc, string? repo = null, CancellationToken ct = default)
    {
        var pr = await svc.GetPullRequestAsync(number, repo, ct);
        return pr is null ? Results.NotFound() : Results.Ok(pr);
    }

    private static async Task<IResult> CreatePull(
        CreatePullRequestRequest req, GiteaService svc, string? repo = null, CancellationToken ct = default)
    {
        var pr = await svc.CreatePullRequestAsync(req, repo, ct);
        return pr is null ? Results.BadRequest("Failed to create PR in Gitea.") : Results.Ok(pr);
    }

    private static async Task<IResult> ListTags(GiteaService svc, string? repo = null, CancellationToken ct = default) =>
        Results.Ok(await svc.ListTagsAsync(repo, ct));

    private static async Task<IResult> CreateTag(
        CreateTagRequest req, GiteaService svc, string? repo = null, CancellationToken ct = default)
    {
        var tag = await svc.CreateTagAsync(req, repo, ct);
        return tag is null ? Results.BadRequest("Failed to create tag in Gitea.") : Results.Ok(tag);
    }

    private static async Task<IResult> ListWebhooks(GiteaService svc, string? repo = null, CancellationToken ct = default) =>
        Results.Ok(await svc.ListWebhooksAsync(repo, ct));

    private static async Task<IResult> RegisterWebhook(
        CreateWebhookRequest req, GiteaService svc, string? repo = null, CancellationToken ct = default)
    {
        var hook = await svc.RegisterWebhookAsync(req, repo, ct);
        return hook is null ? Results.BadRequest("Failed to register webhook in Gitea.") : Results.Ok(hook);
    }
}