using System.Collections.Generic;
using System.Linq;
using System.Text.Json;
using System.Threading.Tasks;
using ChaosBot.Models;
using ChaosBot.WebServer.Models;
using ChaosBot.WebServer.Services;
using FlexLabs.EntityFrameworkCore.Upsert;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

namespace ChaosBot.WebServer.App.ApiControllers
{
    [ApiController]
    [Route("/api/custom-commands")]
    public class CustomCommandController : BaseApiController<CustomCommand, string>
    {
        public CustomCommandController(
            AccessTokenCache accessTokenCache,
            ValidationService validationService
        ) : base(
            accessTokenCache,
            validationService
        ) {}
        
        [HttpGet]
        [Route("{guildId}")]
        public async Task<IActionResult> IndexAction(ulong guildId)
        {
            return await Index(guildId);
        }

        [HttpPost]
        [Route("{guildId}")]
        public async Task<IActionResult> UpsertAction(
            [FromRoute] ulong guildId,
            [FromBody] JsonElement requestBody)
        {
            return await Upsert(guildId, requestBody);
        }

        [HttpDelete]
        [Route("{guildId}/{command}")]
        public async Task<IActionResult> DeleteAction([FromRoute]ulong guildId, [FromRoute]string command)
        {
            return await Delete(guildId, command);
        }

        protected override DbSet<CustomCommand> GetBasicQuery(DatabaseContext context)
        {
            return context.CustomCommands;
        }

        protected override IQueryable<CustomCommand> ApplyFilterForCurrentGuild(IQueryable<CustomCommand> query, ulong guildId)
        {
            return query.Where(e => e.DiscordGuildId == guildId);
        }

        protected override List<string> GetIndexFields() {
            return new List<string>
            {
                "Command",
                "Type",
                "Content"
            };
        }

        protected override Dictionary<string, List<string>> GetValidationRules()
        {
            return new Dictionary<string, List<string>>
            {
                {"Command", new List<string>{"required", "type:string", "min:1", "max:128"}},
                {"Type", new List<string>{"required", "type:integer", "in:CustomCommandType"}},
                {"Content", new List<string>{"required", "type:string"}},
            };
        }

        protected override UpsertCommandBuilder<CustomCommand> ApplyFilterForUpsert(
            UpsertCommandBuilder<CustomCommand> builder)
        {
            return builder.On(cc => new {cc.DiscordGuildId, cc.Command});
        }

        protected override CustomCommand FilterQueryForDeletion(IQueryable<CustomCommand> query, ulong guildId, string deleteParameter)
        {
            return query
                .Where(cc => cc.DiscordGuildId == guildId)
                .First(cc => cc.Command == deleteParameter)
            ;
        }

        protected override List<CustomCommand> FilterQueryMultipleForDeletion(IQueryable<CustomCommand> query, ulong guildId, string deleteParameter)
        {
            return new List<CustomCommand>();
        }

        protected override CustomCommand SetDefaultFieldsForUpsert(CustomCommand obj, ulong guildId)
        {
            obj.DiscordGuildId = guildId;
            return obj;
        }
    }
}