using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using xCommons.Extensions;
using xExceptions.Constants;

namespace xCommons.Providers {
    public partial class XValidationProvider {
        private ICollection<System.Action> validationGroup;

        //
        #region Simple Validators ...
        /// <summary>
        /// given objects must not null
        /// </summary>
        /// <param name="values"></param>
        public void NotNull (
            params object[] values) {
            //
            foreach (var o in values) {
                //
                if (o == null) {
                    XException.InvalidArgs.Throw ();
                }
            }
        }

        /// <summary>
        /// given strings must not empty or null
        /// </summary>
        /// <param name="values"></param>
        public void NotEmpty (
            params string[] values) {
            //
            foreach (var s in values) {
                //
                if (s.IsNullOrEmpty ()) {
                    XException.InvalidArgs.Throw ();
                }
            }
        }

        /// <summary>
        /// Check a numeric value is bigger than 0
        /// </summary>
        /// <param name="values"></param>
        public void NotZero (
            params int[] values) {
            //
            foreach (var s in values) {
                //
                if (s == 0) {
                    XException.InvalidArgs.Throw ();
                }
            }
        }

        /// <summary>
        /// Check a numeric value is bigger than 0
        /// </summary>
        /// <param name="values"></param>
        public void NotZero (
            params long[] values) {
            //
            foreach (var s in values) {
                //
                if (s == 0) {
                    XException.InvalidArgs.Throw ();
                }
            }
        }

        /// <summary>
        /// Check a numeric value is bigger than 0
        /// </summary>
        /// <param name="values"></param>
        public void NotZero (
            params decimal[] values) {
            //
            foreach (var s in values) {
                //
                if (s == 0) {
                    XException.InvalidArgs.Throw ();
                }
            }
        }

        /// <summary>
        /// Check a Value is a Valid Guid ...
        /// </summary>
        /// <param name="values"></param>
        public void IsGuid (params string[] values) {
            //
            foreach (var s in values) {
                //
                if (!s.IsGuid () || s.IsDefaultGuid ()) {
                    XException.InvalidArgs.Throw ();
                }
            }
        }

        /// <summary>
        /// Check a Value is a Valid Guid ...
        /// </summary>
        /// <param name="values"></param>
        public void IsGuid (params Guid[] values) {
            //
            foreach (var s in values) {
                //
                if (s.IsNull () || s.IsDefaultGuid ()) {
                    XException.InvalidArgs.Throw ();
                }
            }
        }

        /// <summary>
        /// Check a Value is an MD5 ...
        /// </summary>
        /// <param name="values"></param>
        public void IsMD5 (params string[] values) {
            //
            foreach (var s in values) {
                //
                if (!s.IsMD5String ()) {
                    XException.InvalidArgs.Throw ();
                }
            }
        }

        /// <summary>
        /// non zero childs
        /// </summary>
        /// <param name="values"></param>
        public void NotZeroChilds (
            params IEnumerable<object>[] values) {
            //
            foreach (var s in values) {
                //
                if (s == null ||
                    s.Count () == 0) {
                    XException.InvalidArgs.Throw ();
                }
            }
        }

        /// <summary>
        /// non zero childs
        /// </summary>
        /// <param name="values"></param>
        public void NotZeroChilds (
            params ICollection<object>[] values) {
            //
            foreach (var s in values) {
                //
                if (s == null ||
                    s.Count == 0) {
                    XException.InvalidArgs.Throw ();
                }
            }
        }

        /// <summary>
        /// given string must be a valid URL ...
        /// </summary>
        /// <param name="url"></param>
        /// <param name="exception"></param>
        public void Url (
            string url,
            Exception exception = null
        ) {
            //
            NotEmpty (url);

            //
            if (exception == null) {
                exception = XException.InavlidUrl.ToException ();
            }

            //
            if (!url.IsValidUrl ()) {
                throw exception;
            }
        }

        /// <summary>
        /// given string must be a valid Email Address ...
        /// </summary>
        /// <param name="emailAdress"></param>
        /// <param name="exception"></param>
        public void EmailAddress (
            string emailAdress,
            Exception exception = null
        ) {
            //
            NotEmpty (emailAdress);

            //
            if (exception == null) {
                exception = XException.InvalidEmailAddress.ToException ();
            }

            //
            if (!emailAdress.IsValidEmail ()) {
                throw exception;
            }
        }

        /// <summary>
        /// given string must be a valid Mobile Number ...
        /// </summary>
        /// <param name="mobileNumber"></param>
        /// <param name="exception"></param>
        public void MobileNumber (
            string mobileNumber,
            Exception exception = null
        ) {
            //
            NotEmpty (mobileNumber);

            //
            if (exception == null) {
                exception = XException.InvalidMobileNumber.ToException ();
            }

            //
            if (!mobileNumber.IsValidMobileNumber ()) {
                throw exception;
            }
        }
        #endregion

        //
        #region Group Validatos ...
        public XValidationProvider GroupValidationBuilder () {
            //
            validationGroup = new List<System.Action> ();

            //
            return this;
        }

        public XValidationProvider AddNotEmpty (params string[] values) {
            //
            this.validationGroup.Add (() =>
                this.NotEmpty (values)
            );

            //
            return this;
        }

        public XValidationProvider AddNotNull (params object[] values) {
            //
            this.validationGroup.Add (() =>
                this.NotNull (values)
            );

            //
            return this;
        }

        public XValidationProvider AddNotZero (params int[] values) {
            //
            this.validationGroup.Add (() =>
                this.NotZero (values)
            );

            //
            return this;
        }

        public XValidationProvider AddNotZero (params long[] values) {
            //
            this.validationGroup.Add (() =>
                this.NotZero (values)
            );

            //
            return this;
        }

        public XValidationProvider AddNotZero (params decimal[] values) {
            //
            this.validationGroup.Add (() =>
                this.NotZero (values)
            );

            //
            return this;
        }

        public XValidationProvider AddIsGuid (params string[] values) {
            //
            this.validationGroup.Add (() =>
                this.IsGuid (values)
            );

            //
            return this;
        }

        public XValidationProvider AddIsGuid (params Guid[] values) {
            //
            this.validationGroup.Add (() =>
                this.IsGuid (values)
            );

            //
            return this;
        }

        public XValidationProvider AddIsMD5 (params string[] values) {
            //
            this.validationGroup.Add (() =>
                this.IsMD5 (values)
            );

            //
            return this;
        }

        public XValidationProvider AddNotZeroChilds (params IEnumerable<object>[] values) {
            //
            this.validationGroup.Add (() =>
                this.NotZeroChilds (values)
            );

            //
            return this;
        }

        public XValidationProvider AddNotZeroChilds (params ICollection<object>[] values) {
            //
            this.validationGroup.Add (() =>
                this.NotZeroChilds (values)
            );

            //
            return this;
        }

        public XValidationProvider AddEmailAddress (
            string emailAdress,
            Exception exception = null) {
            //
            this.validationGroup.Add (() =>
                this.EmailAddress (emailAdress, exception)
            );

            //
            return this;
        }

        public XValidationProvider AddMobileNumber (
            string mobileNumber,
            Exception exception = null) {
            //
            this.validationGroup.Add (() =>
                this.MobileNumber (mobileNumber, exception)
            );

            //
            return this;
        }

        public XValidationProvider AddUrl (
            string url,
            Exception exception = null) {
            //
            this.validationGroup.Add (() =>
                this.Url (url, exception)
            );

            //
            return this;
        }

        public void ValidateGroup () {
            //
            // Run each Tasks ...
            foreach (var action in validationGroup) {
                action.Invoke ();
            }

            //
            // Clear Task List ...
            validationGroup.Clear ();
        }

        public async Task ValidateGroupAsync () {
            //
            // Run each Tasks ...
            foreach (var action in validationGroup) {
                await Task.Run (action);
            }

            //
            // Clear Task List ...
            validationGroup.Clear ();
        }
        #endregion    

    }
}