using System.Collections.Generic;
using System.Linq;
using SepCore.Definition;
using SepCore.Procedure;
using Random = UnityEngine.Random;

namespace SepCore.UI
{
    public class SelectRoleUseCase : IUIUseCase
    {
        private readonly IProcedureMenu _procedureMenu;

        public int SelectedRoleId { get; private set; }

        public SelectRoleUseCase(IProcedureMenu procedureMenu)
        {
            _procedureMenu = procedureMenu;
        }

        public SelectRoleRawData CreateModel()
        {
            return BuildModel(0);
        }

        public SelectRoleRawData SelectRole(int roleId)
        {
            SelectedRoleId = roleId;
            return BuildModel(roleId);
        }

        public SelectRoleRawData ClearSelection()
        {
            SelectedRoleId = 0;
            return BuildModel(0);
        }

        public bool ConfirmSelectedRole()
        {
            IReadOnlyList<RoleConfig> roles = GameEntry.Luban.GetTable<RoleConfig>();
            if (roles == null || roles.Count == 0)
            {
                return false;
            }

            if (SelectedRoleId <= 0 || !roles.Any(r => r.Id == SelectedRoleId))
            {
                int randomIndex = Random.Range(0, roles.Count);
                SelectedRoleId = roles[randomIndex].Id;
            }

            _procedureMenu.ConfirmSelectRole(SelectedRoleId);
            return true;
        }

        private SelectRoleRawData BuildModel(int selectedRoleId)
        {
            IReadOnlyList<RoleConfig> roles = GameEntry.Luban.GetTable<RoleConfig>();
            int count = roles.Count;
            RoleItemRawData[] roleItems = new RoleItemRawData[count];
            for (int i = 0; i < count; i++)
            {
                roleItems[i] = new RoleItemRawData
                {
                    RoleId = roles[i].Id,
                    IconName = roles[i].IconName
                };
            }

            RoleConfig selectedRole = selectedRoleId > 0 ? roles.FirstOrDefault(r => r.Id == selectedRoleId) : null;
            RolePropertyAreaRawData selectedRoleData = selectedRole == null
                ? null
                : new RolePropertyAreaRawData
                {
                    RoleId = selectedRole.Id,
                    RoleName = selectedRole.RoleName,
                    InitialProperties = selectedRole.Modifiers
                };

            return new SelectRoleRawData
            {
                RoleItems = roleItems,
                SelectedRole = selectedRoleData
            };
        }
    }
}