/*!
 * Module requirements.
 */

'use strict';

const MongooseError = require('../error/index');
const SchemaDateOptions = require('../options/SchemaDateOptions');
const SchemaType = require('../schematype');
const castDate = require('../cast/date');
const utils = require('../utils');

const CastError = SchemaType.CastError;

/**
 * Date SchemaType constructor.
 *
 * @param {String} key
 * @param {Object} options
 * @inherits SchemaType
 * @api public
 */

function SchemaDate(key, options) {
  SchemaType.call(this, key, options, 'Date');
}

/**
 * This schema type's name, to defend against minifiers that mangle
 * function names.
 *
 * @api public
 */
SchemaDate.schemaName = 'Date';

/*!
 * Inherits from SchemaType.
 */
SchemaDate.prototype = Object.create(SchemaType.prototype);
SchemaDate.prototype.constructor = SchemaDate;
SchemaDate.prototype.OptionsConstructor = SchemaDateOptions;

/*!
 * ignore
 */

SchemaDate._cast = castDate;

/**
 * Get/set the function used to cast arbitrary values to dates.
 *
 * ####Example:
 *
 *     // Mongoose converts empty string '' into `null` for date types. You
 *     // can create a custom caster to disable it.
 *     const original = mongoose.Schema.Types.Date.cast();
 *     mongoose.Schema.Types.Date.cast(v => {
 *       assert.ok(v !== '');
 *       return original(v);
 *     });
 *
 *     // Or disable casting entirely
 *     mongoose.Schema.Types.Date.cast(false);
 *
 * @param {Function} caster
 * @return {Function}
 * @function get
 * @static
 * @api public
 */

SchemaDate.cast = function cast(caster) {
  if (arguments.length === 0) {
    return this._cast;
  }
  if (caster === false) {
    caster = v => {
      if (v != null && !(v instanceof Date)) {
        throw new Error();
      }
      return v;
    };
  }
  this._cast = caster;

  return this._cast;
};

/**
 * Declares a TTL index (rounded to the nearest second) for _Date_ types only.
 *
 * This sets the `expireAfterSeconds` index option available in MongoDB >= 2.1.2.
 * This index type is only compatible with Date types.
 *
 * ####Example:
 *
 *     // expire in 24 hours
 *     new Schema({ createdAt: { type: Date, expires: 60*60*24 }});
 *
 * `expires` utilizes the `ms` module from [guille](https://github.com/guille/) allowing us to use a friendlier syntax:
 *
 * ####Example:
 *
 *     // expire in 24 hours
 *     new Schema({ createdAt: { type: Date, expires: '24h' }});
 *
 *     // expire in 1.5 hours
 *     new Schema({ createdAt: { type: Date, expires: '1.5h' }});
 *
 *     // expire in 7 days
 *     var schema = new Schema({ createdAt: Date });
 *     schema.path('createdAt').expires('7d');
 *
 * @param {Number|String} when
 * @added 3.0.0
 * @return {SchemaType} this
 * @api public
 */

SchemaDate.prototype.expires = function(when) {
  if (!this._index || this._index.constructor.name !== 'Object') {
    this._index = {};
  }

  this._index.expires = when;
  utils.expires(this._index);
  return this;
};

/*!
 * ignore
 */

SchemaDate._checkRequired = v => v instanceof Date;

/**
 * Override the function the required validator uses to check whether a string
 * passes the `required` check.
 *
 * ####Example:
 *
 *     // Allow empty strings to pass `required` check
 *     mongoose.Schema.Types.String.checkRequired(v => v != null);
 *
 *     const M = mongoose.model({ str: { type: String, required: true } });
 *     new M({ str: '' }).validateSync(); // `null`, validation passes!
 *
 * @param {Function} fn
 * @return {Function}
 * @function checkRequired
 * @static
 * @api public
 */

SchemaDate.checkRequired = SchemaType.checkRequired;

/**
 * Check if the given value satisfies a required validator. To satisfy
 * a required validator, the given value must be an instance of `Date`.
 *
 * @param {Any} value
 * @param {Document} doc
 * @return {Boolean}
 * @api public
 */

SchemaDate.prototype.checkRequired = function(value, doc) {
  if (SchemaType._isRef(this, value, doc, true)) {
    return !!value;
  }

  // `require('util').inherits()` does **not** copy static properties, and
  // plugins like mongoose-float use `inherits()` for pre-ES6.
  const _checkRequired = typeof this.constructor.checkRequired == 'function' ?
    this.constructor.checkRequired() :
    SchemaDate.checkRequired();
  return _checkRequired(value);
};

/**
 * Sets a minimum date validator.
 *
 * ####Example:
 *
 *     var s = new Schema({ d: { type: Date, min: Date('1970-01-01') })
 *     var M = db.model('M', s)
 *     var m = new M({ d: Date('1969-12-31') })
 *     m.save(function (err) {
 *       console.error(err) // validator error
 *       m.d = Date('2014-12-08');
 *       m.save() // success
 *     })
 *
 *     // custom error messages
 *     // We can also use the special {MIN} token which will be replaced with the invalid value
 *     var min = [Date('1970-01-01'), 'The value of path `{PATH}` ({VALUE}) is beneath the limit ({MIN}).'];
 *     var schema = new Schema({ d: { type: Date, min: min })
 *     var M = mongoose.model('M', schema);
 *     var s= new M({ d: Date('1969-12-31') });
 *     s.validate(function (err) {
 *       console.log(String(err)) // ValidationError: The value of path `d` (1969-12-31) is before the limit (1970-01-01).
 *     })
 *
 * @param {Date} value minimum date
 * @param {String} [message] optional custom error message
 * @return {SchemaType} this
 * @see Customized Error Messages #error_messages_MongooseError-messages
 * @api public
 */

SchemaDate.prototype.min = function(value, message) {
  if (this.minValidator) {
    this.validators = this.validators.filter(function(v) {
      return v.validator !== this.minValidator;
    }, this);
  }

  if (value) {
    let msg = message || MongooseError.messages.Date.min;
    msg = msg.replace(/{MIN}/, (value === Date.now ? 'Date.now()' : value.toString()));
    const _this = this;
    this.validators.push({
      validator: this.minValidator = function(val) {
        let _value = value;
        if (typeof value === 'function' && value !== Date.now) {
          _value = _value.call(this);
        }
        const min = (_value === Date.now ? _value() : _this.cast(_value));
        return val === null || val.valueOf() >= min.valueOf();
      },
      message: msg,
      type: 'min',
      min: value
    });
  }

  return this;
};

/**
 * Sets a maximum date validator.
 *
 * ####Example:
 *
 *     var s = new Schema({ d: { type: Date, max: Date('2014-01-01') })
 *     var M = db.model('M', s)
 *     var m = new M({ d: Date('2014-12-08') })
 *     m.save(function (err) {
 *       console.error(err) // validator error
 *       m.d = Date('2013-12-31');
 *       m.save() // success
 *     })
 *
 *     // custom error messages
 *     // We can also use the special {MAX} token which will be replaced with the invalid value
 *     var max = [Date('2014-01-01'), 'The value of path `{PATH}` ({VALUE}) exceeds the limit ({MAX}).'];
 *     var schema = new Schema({ d: { type: Date, max: max })
 *     var M = mongoose.model('M', schema);
 *     var s= new M({ d: Date('2014-12-08') });
 *     s.validate(function (err) {
 *       console.log(String(err)) // ValidationError: The value of path `d` (2014-12-08) exceeds the limit (2014-01-01).
 *     })
 *
 * @param {Date} maximum date
 * @param {String} [message] optional custom error message
 * @return {SchemaType} this
 * @see Customized Error Messages #error_messages_MongooseError-messages
 * @api public
 */

SchemaDate.prototype.max = function(value, message) {
  if (this.maxValidator) {
    this.validators = this.validators.filter(function(v) {
      return v.validator !== this.maxValidator;
    }, this);
  }

  if (value) {
    let msg = message || MongooseError.messages.Date.max;
    msg = msg.replace(/{MAX}/, (value === Date.now ? 'Date.now()' : value.toString()));
    const _this = this;
    this.validators.push({
      validator: this.maxValidator = function(val) {
        let _value = value;
        if (typeof _value === 'function' && _value !== Date.now) {
          _value = _value.call(this);
        }
        const max = (_value === Date.now ? _value() : _this.cast(_value));
        return val === null || val.valueOf() <= max.valueOf();
      },
      message: msg,
      type: 'max',
      max: value
    });
  }

  return this;
};

/**
 * Casts to date
 *
 * @param {Object} value to cast
 * @api private
 */

SchemaDate.prototype.cast = function(value) {
  const castDate = typeof this.constructor.cast === 'function' ?
    this.constructor.cast() :
    SchemaDate.cast();
  try {
    return castDate(value);
  } catch (error) {
    throw new CastError('date', value, this.path);
  }
};

/*!
 * Date Query casting.
 *
 * @api private
 */

function handleSingle(val) {
  return this.cast(val);
}

SchemaDate.prototype.$conditionalHandlers =
    utils.options(SchemaType.prototype.$conditionalHandlers, {
      $gt: handleSingle,
      $gte: handleSingle,
      $lt: handleSingle,
      $lte: handleSingle
    });


/**
 * Casts contents for queries.
 *
 * @param {String} $conditional
 * @param {any} [value]
 * @api private
 */

SchemaDate.prototype.castForQuery = function($conditional, val) {
  if (arguments.length !== 2) {
    return this._castForQuery($conditional);
  }

  const handler = this.$conditionalHandlers[$conditional];

  if (!handler) {
    throw new Error('Can\'t use ' + $conditional + ' with Date.');
  }

  return handler.call(this, val);
};

/*!
 * Module exports.
 */

module.exports = SchemaDate;