// Copyright (c) 2012 Web Notes Technologies Pvt Ltd (http://erpnext.com)
// 
// MIT License (MIT)
// 
// Permission is hereby granted, free of charge, to any person obtaining a 
// copy of this software and associated documentation files (the "Software"), 
// to deal in the Software without restriction, including without limitation 
// the rights to use, copy, modify, merge, publish, distribute, sublicense, 
// and/or sell copies of the Software, and to permit persons to whom the 
// Software is furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in 
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 
// PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT 
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF 
// CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 
// OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
// 

// Local DB 
//-----------

var locals = {'DocType':{}};
var LocalDB={};
var READ = 0; var WRITE = 1; var CREATE = 2; var SUBMIT = 3; var CANCEL = 4; var AMEND = 5;

LocalDB.getchildren = function(child_dt, parent, parentfield, parenttype) { 
	var l = []; 
	for(var key in locals[child_dt]) {
		var d = locals[child_dt][key];
		if((d.parent == parent)&&(d.parentfield == parentfield)) {
			if(parenttype) {
				if(d.parenttype==parenttype)l.push(d);
			} else { // ignore for now
				l.push(d);
			}
		}
	} 
	l.sort(function(a,b){return (cint(a.idx)-cint(b.idx))}); return l; 
}

// Add Doc
// ======================================================================================

LocalDB.add=function(dt, dn) {
	if(!locals[dt]) locals[dt] = {}; if(locals[dt][dn]) delete locals[dt][dn];
	locals[dt][dn] = {'name':dn, 'doctype':dt, 'docstatus':0};
	return locals[dt][dn];
}

// Delete Doc
// ======================================================================================

LocalDB.delete_doc=function(dt, dn) {
	var doc = get_local(dt, dn);
	if(!doc) return;

	for(var ndt in locals) { // all doctypes
		if(locals[ndt]) {
			for(var ndn in locals[ndt]) {
				var doc = locals[ndt][ndn];
				if(doc && doc.parenttype==dt && (doc.parent==dn||doc.__oldparent==dn)) {
					delete locals[ndt][ndn];
				}
			}
		}
	}
	delete locals[dt][dn];
}

function get_local(dt, dn) { return locals[dt] ? locals[dt][dn] : null; }

// Sync Records from Server
// ======================================================================================

LocalDB.sync = function(list) {
	if(keys(list._kl))
		list = expand_doclist(list);
	if(list.length) {
		LocalDB.clear_locals(list[0].doctype, list[0].name);
	} else {
		return;
	}
	for(var i=0;i<list.length;i++) {
		var d = list[i];
		if(!d.name) // get name (local if required)
			d.name = LocalDB.get_localname(d.doctype);

		LocalDB.add(d.doctype, d.name);
		locals[d.doctype][d.name] = d;

		// reset cur_frm.doc (as new doc is loaded from the server)
		if(cur_frm && cur_frm.doctype==d.doctype && cur_frm.docname==d.name) {
			cur_frm.doc = d;
		}

		if(d.doctype=='DocField') 
			wn.meta.add_field(d);

		if(d.localname) {
			wn.model.new_names[d.localname] = d.name;
			$(document).trigger('rename', [d.doctype, d.localname, d.name]);
			delete locals[d.doctype][d.localname];
		}
	}
}

LocalDB.clear_locals = function(dt, dn) {
	var doclist = make_doclist(dt, dn, 1);
	// console.dir(['in clear', doclist]);
	$.each(doclist, function(i, v) {
		v && delete locals[v.doctype][v.name];
	});
}


// Get Local Name
// ======================================================================================

local_name_idx = {};
LocalDB.get_localname=function(doctype) {
	if(!local_name_idx[doctype]) local_name_idx[doctype] = 1;
	var n = 'New '+ get_doctype_label(doctype) + ' ' + local_name_idx[doctype];
	local_name_idx[doctype]++;
	return n;
}

// Create Local Doc
// ======================================================================================

LocalDB.set_default_values = function(doc) {
	var doctype = doc.doctype;
	var docfields = wn.meta.docfield_list[doctype];
	if(!docfields) {
		return;
	}
	var fields_to_refresh = [];
	for(var fid=0;fid<docfields.length;fid++) {
		var f = docfields[fid];
		if(!in_list(no_value_fields, f.fieldtype) && doc[f.fieldname]==null) {
			var v = LocalDB.get_default_value(f.fieldname, f.fieldtype, f['default']);
			if(v) {
				doc[f.fieldname] = v;
				fields_to_refresh.push(f.fieldname);
			}
		}
	}
	return fields_to_refresh;
}

// ======================================================================================

LocalDB.create = function(doctype, n) {
	if(!n) n = LocalDB.get_localname(doctype);
	var doc = LocalDB.add(doctype, n)
	doc.__islocal=1; doc.owner = user;	
	LocalDB.set_default_values(doc);
	return n;
}

// ======================================================================================

LocalDB.delete_record = function(dt, dn)  {
	delete locals[dt][dn];
}

// ======================================================================================

LocalDB.get_default_value = function(fn, ft, df) {
	if(df=='_Login' || df=='__user')
		return user;
	else if(df=='_Full Name')
		return user_fullname;
	else if(ft=='Date'&& (df=='Today' || df=='__today')) {
		return get_today(); }
	else if(df)
		return df;
	else if(user_defaults[fn])
		return user_defaults[fn][0];
	else if(sys_defaults[fn])
		return sys_defaults[fn];
}

// ======================================================================================

LocalDB.add_child = function(doc, childtype, parentfield) {
	// create row doc
	var n = LocalDB.create(childtype);
	var d = locals[childtype][n];
	d.parent = doc.name;
	d.parentfield = parentfield;
	d.parenttype = doc.doctype;
	return d;
}

// ======================================================================================

LocalDB.no_copy_list = ['amended_from','amendment_date','cancel_reason'];
LocalDB.copy=function(dt, dn, from_amend) {
	var newdoc = LocalDB.create(dt);
	for(var key in locals[dt][dn]) {
		// dont copy name and blank fields
		var df = wn.meta.get_docfield(dt, key);
		if(key!=='name' && key.substr(0,2)!='__' &&
			!(df && ((!from_amend && cint(df.no_copy)==1) || in_list(LocalDB.no_copy_list, df.fieldname)))) { 
			locals[dt][newdoc][key] = locals[dt][dn][key];
		}
	}
	return locals[dt][newdoc];
}

// ======================================================================================

function make_doclist(dt, dn) {
	if(!locals[dt]) { return []; }
	var dl = [];
	dl[0] = locals[dt][dn];
	
	// get children
	for(var ndt in locals) { // all doctypes
		if(locals[ndt]) {
			for(var ndn in locals[ndt]) {
				var doc = locals[ndt][ndn];
				if(doc && doc.parenttype==dt && doc.parent==dn) {
					dl.push(doc)
				}
			}
		}
	}
	return dl;
}

// Meta Data
// ======================================================================================

var Meta={};
var local_dt = {};

// Make Unique Copy of DocType for each record for client scripting
Meta.make_local_dt = function(dt, dn) {
	var dl = make_doclist('DocType', dt);
	if(!local_dt[dt]) 	  local_dt[dt]={};
	if(!local_dt[dt][dn]) local_dt[dt][dn]={};
	for(var i=0;i<dl.length;i++) {
		var d = dl[i];
		if(d.doctype=='DocField') {
			var key = d.fieldname ? d.fieldname : d.label; 
			local_dt[dt][dn][key] = copy_dict(d);
			local_dt[dt][dn][key].__copy = true;
		}
	}
}

Meta.set_field_property=function(fn, key, val, doc) {
	if(!doc && (cur_frm.doc))doc = cur_frm.doc;
	try{
		local_dt[doc.doctype][doc.name][fn][key] = val;
		refresh_field(fn);
	} catch(e) {
		alert("Client Script Error: Unknown values for " + doc.name + ',' + fn +'.'+ key +'='+ val);
	}
}

Meta.get_field = function(dt, fn, dn) {
	try {
		return local_dt[dt][dn][fn];
	} catch(e) {
		return null;
	}
}

// Get Dt label
// ======================================================================================
function get_doctype_label(dt) {
	return dt
}

function get_label_doctype(label) {
	return label
}
// Global methods for API
// ======================================================================================

var getchildren = LocalDB.getchildren;
var createLocal = LocalDB.create;