orion.Bundle = function(framework, bundleId, location, headers) {
	this._framework = framework;
	this._bundleId = bundleId;
	this._location = location;
	this._headers = headers || eval("(" + orion.Framework._fetch(location + "/META-INF/manifest.json") + ")"); //naughty
	this._name = null;
	this._version = null;
	this._singleton = false;
	this._imports = [];
	this._exports = [];
	this._resources = {};
	this._globals = [];
	this._state = orion.Bundle.INSTALLED;
	this._scope = {};
	this._bundleContext = null;
	this._script = null;

	this._parseName(this._headers.name);
	this._parseVersion(this._headers.version);
	this._parseSingleton(this._headers.singleton);
	this._parseImports(this._headers.imports);
	this._parseExports(this._headers.exports);
	this._parseResources(this._headers.resources);
	this._parsePath(this._headers.path);
	this._parseGlobals(this._headers.globals);
};

orion.Bundle.UNINSTALLED = 1;
orion.Bundle.INSTALLED = 2;
orion.Bundle.RESOLVED = 4;

orion.Bundle.prototype = {
	getName : function() {
		return this._name;
	},
	getVersion : function() {
		return this._version;
	},
	getBundleId : function() {
		return this._bundleId;
	},
	getLocation : function() {
		return this._location;
	},
	getHeaders : function() {
		return this._headers;
	},
	getState : function() {
		return this._state;
	},
	getEntry : function(path) {
		if (!path || !path instanceof String || !this._resources[path])
			return null;
		
		return this.getLocation() + path;
	},
	getResource : function(path) {
		if (!path || !path instanceof String)
			return null;
		
		var i = 0;
		var resource;
		for (i = 0; i < this._imports.length; i++) {
			var jsImport = this._imports[i];
			var jsExport = jsImport.getWiredExport();
			if (!jsExport)
				continue; // optional
			var name = jsExport.getName();
			if (name.charAt(0) != "/")
				continue; // not a resource
			if (path.indexOf(name)==0) {
				resource = jsExport.getExportingBundle().getEntry(path);
				if (resource)
					return resource;
			}
		}	
		return this.getEntry(path);	
	},
	getImports : function() {
		return this._imports;
	},
	getExports : function() {
		return this._exports;
	},
	equals : function(other) {
		if (this === other)
			return true;

		if (!other instanceof orion.Bundle)
			return false;

		if (this._name !== other._name)
			return false;
		if (this._version === null) {
			if (other._version !== null)
				return false;
		} else if (!this._version.equals(other._version))
			return false;
		return true;
	},
	uninstall : function() {
		this._state = orion.Bundle.UNINSTALLED;
	},
	load : function(name) {
		return this._framework._loader.load(this, name);
	},
	_isSingleton : function() {
		return this._singleton;
	},
	_getImports : function() {
		return this._imports;
	},
	_getExports : function() {
		return this._exports;
	},
	_resolve : function() {
		this._framework._loader.resolve(this);
		this._state = orion.Bundle.RESOLVED;
	},
	_unresolve : function() {
		this._framework._loader.unresolve(this);
		if (this._state == orion.Bundle.RESOLVED)
			this._state = orion.Bundle.INSTALLED;
	},
	_parseName : function(header) {
		this._name = header;
	},
	_parseSingleton : function(header) {
		if (typeof header == "boolean")
			this._singleton = header;
	},
	_parseVersion : function(header) {
		this._version = orion.Version.parseVersion(header);
	},
	_parseGlobals : function(header) {
		if (!header)
			return;

		for ( var i = 0; i < header.length; i++) {
			if (header[i]) {
				this._globals.push(header[i]);
			}
		}
	},
	_parseResources : function(header) {
		if (!header)
			return;

		for ( var i = 0; i < header.length; i++) {
			if (header[i]) {
				this._resources[header[i]] = true;
			}
		}
	},
	_parseExports : function(header) {
		if (!header)
			return;
		
		for ( var i = 0; i < header.length; i++) {
			var jsExport = new orion.Export(header[i], this);
			if (jsExport !== null)
				this._exports.push(jsExport);
		}
	},
	_parseImports : function(header) {
		if (!header)
			return;

		for ( var i = 0; i < header.length; i++) {
			var jsImport = new orion.Import(header[i]);
			if (jsImport !== null)
				this._imports.push(jsImport);
		}
	},
	_parsePath : function(header) {
		if (!header) {
			this._script = this._headers.script || "";
			return;
		}
		var scripts = [];
		for ( var i = 0; i < header.length; i++) {
			var path = header[i];
			if (path === ".") {
				scripts[i] = this._headers.script || "";
			} else {
				var scriptURL = this.getResource(path);
				scripts[i] = orion.Framework._fetch(scriptURL);
			}
		}
		this._script = scripts.join("\n\n");
	}
};