using GameList.Contracts;
using GameList.Data;
using GameList.Domain;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace GameList.Endpoints;

public static class SuggestEndpoints
{
    public static void MapSuggestEndpoints(this IEndpointRouteBuilder app)
    {
        app.MapGet("/api/suggestions/mine", async (HttpContext ctx, AppDbContext db) =>
        {
            var phase = await EndpointHelpers.GetPhase(db);
            if (phase != Phase.Suggest)
                return EndpointHelpers.PhaseMismatch(Phase.Suggest, phase);

            var player = await EndpointHelpers.GetAuthenticatedPlayer(ctx, db);
            if (player is null) return Results.Unauthorized();
            var mine = await db.Suggestions.AsNoTracking()
                .Where(s => s.PlayerId == player.Id)
                .Select(s => new
                {
                    s.Id,
                    s.Name,
                    s.Genre,
                    s.Description,
                    s.ScreenshotUrl,
                    s.YoutubeUrl,
                    s.GameUrl,
                    s.CreatedAt
                })
                .ToListAsync();

            var ordered = mine
                .OrderBy(s => s.CreatedAt)
                .Select(s => new SuggestionDto(s.Id, s.Name, s.Genre, s.Description, s.ScreenshotUrl, s.YoutubeUrl, s.GameUrl));

            return Results.Ok(ordered);
        });

        app.MapPost("/api/suggestions", async ([FromBody] SuggestionRequest request, HttpContext ctx, AppDbContext db) =>
        {
            var phase = await EndpointHelpers.GetPhase(db);
            if (phase != Phase.Suggest)
                return EndpointHelpers.PhaseMismatch(Phase.Suggest, phase);

            if (string.IsNullOrWhiteSpace(request.Name) || request.Name.Length > 100)
            {
                return Results.BadRequest(new { error = "Name is required and must be <= 100 characters." });
            }

            var player = await EndpointHelpers.GetAuthenticatedPlayer(ctx, db);
            if (player is null) return Results.Unauthorized();

            if (string.IsNullOrWhiteSpace(player.DisplayName))
            {
                return Results.BadRequest(new { error = "Set a display name before submitting suggestions." });
            }

            var existingCount = await db.Suggestions.CountAsync(s => s.PlayerId == player.Id);
            if (existingCount >= 3)
            {
                return Results.BadRequest(new { error = "You have reached the 3 suggestion limit." });
            }

            var suggestion = new Suggestion
            {
                PlayerId = player.Id,
                Name = request.Name.Trim(),
                Genre = EndpointHelpers.TrimTo(request.Genre, 50),
                Description = EndpointHelpers.TrimTo(request.Description, 500),
                ScreenshotUrl = EndpointHelpers.TrimTo(request.ScreenshotUrl, 2048),
                YoutubeUrl = EndpointHelpers.TrimTo(request.YoutubeUrl, 2048),
                GameUrl = EndpointHelpers.TrimTo(request.GameUrl, 2048)
            };

            db.Suggestions.Add(suggestion);
            await db.SaveChangesAsync();

            return Results.Created($"/api/suggestions/{suggestion.Id}", new { suggestion.Id });
        });

        app.MapDelete("/api/suggestions/{id:int}", async (int id, HttpContext ctx, AppDbContext db) =>
        {
            var phase = await EndpointHelpers.GetPhase(db);
            if (phase != Phase.Suggest)
                return EndpointHelpers.PhaseMismatch(Phase.Suggest, phase);

            var player = await EndpointHelpers.GetAuthenticatedPlayer(ctx, db);
            if (player is null) return Results.Unauthorized();
            var suggestion = await db.Suggestions.FirstOrDefaultAsync(s => s.Id == id && s.PlayerId == player.Id);
            if (suggestion == null)
                return Results.NotFound(new { error = "Suggestion not found." });

            db.Suggestions.Remove(suggestion);
            await db.SaveChangesAsync();
            return Results.NoContent();
        });

        app.MapPut("/api/suggestions/{id:int}", async (int id, [FromBody] SuggestionRequest request, HttpContext ctx, AppDbContext db, IConfiguration config) =>
        {
            var player = await EndpointHelpers.GetAuthenticatedPlayer(ctx, db);
            var isAdmin = await EndpointHelpers.IsAdmin(ctx, db, config);

            if (!isAdmin)
            {
                if (player is null) return Results.Unauthorized();

                var phase = await EndpointHelpers.GetPhase(db);
                if (phase != Phase.Suggest)
                    return EndpointHelpers.PhaseMismatch(Phase.Suggest, phase);
            }

            if (string.IsNullOrWhiteSpace(request.Name) || request.Name.Length > 100)
            {
                return Results.BadRequest(new { error = "Name is required and must be <= 100 characters." });
            }

            var suggestion = await db.Suggestions.FirstOrDefaultAsync(s => s.Id == id);
            if (suggestion == null) return Results.NotFound(new { error = "Suggestion not found." });

            if (!isAdmin)
            {
                if (suggestion.PlayerId != player!.Id)
                    return Results.Unauthorized();
            }

            suggestion.Name = request.Name.Trim();
            suggestion.Genre = EndpointHelpers.TrimTo(request.Genre, 50);
            suggestion.Description = EndpointHelpers.TrimTo(request.Description, 500);
            suggestion.ScreenshotUrl = EndpointHelpers.TrimTo(request.ScreenshotUrl, 2048);
            suggestion.YoutubeUrl = EndpointHelpers.TrimTo(request.YoutubeUrl, 2048);
            suggestion.GameUrl = EndpointHelpers.TrimTo(request.GameUrl, 2048);

            await db.SaveChangesAsync();

            return Results.Ok(new
            {
                suggestion.Id,
                suggestion.Name,
                suggestion.Genre,
                suggestion.Description,
                suggestion.ScreenshotUrl,
                suggestion.YoutubeUrl,
                suggestion.GameUrl
            });
        });

        app.MapGet("/api/suggestions/all", async (HttpContext ctx, AppDbContext db) =>
        {
            var phase = await EndpointHelpers.GetPhase(db);
            if (phase < Phase.Reveal)
                return EndpointHelpers.PhaseMismatch(Phase.Reveal, phase);

            var player = await EndpointHelpers.GetAuthenticatedPlayer(ctx, db);
            if (player is null) return Results.Unauthorized();

            var all = await db.Suggestions.AsNoTracking()
                .Include(s => s.Player)
                .Select(s => new
                {
                    s.Id,
                    s.Name,
                    s.Genre,
                    s.Description,
                    s.ScreenshotUrl,
                    s.YoutubeUrl,
                    s.GameUrl,
                    Author = s.Player!.DisplayName,
                    s.CreatedAt
                })
                .ToListAsync();

            var ordered = all
                .OrderBy(s => s.CreatedAt)
                .Select(s => new
                {
                    s.Id,
                    s.Name,
                    s.Genre,
                    s.Description,
                    s.ScreenshotUrl,
                    s.YoutubeUrl,
                    s.GameUrl,
                    s.Author
                });

            return Results.Ok(ordered);
        });
    }
}