/*
 * Copyright (C) 2012 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/**
 * @constructor
 * @implements {WebInspector.DebuggerSourceMapping}
 * @param {!WebInspector.DebuggerModel} debuggerModel
 * @param {!WebInspector.Workspace} workspace
 * @param {!WebInspector.DebuggerWorkspaceBinding} debuggerWorkspaceBinding
 */
WebInspector.DefaultScriptMapping = function(debuggerModel, workspace, debuggerWorkspaceBinding)
{
    this._debuggerModel = debuggerModel;
    this._debuggerWorkspaceBinding = debuggerWorkspaceBinding;
    this._workspace = workspace;
    this._projectId = WebInspector.DefaultScriptMapping.projectIdForTarget(debuggerModel.target());
    this._project = new WebInspector.ContentProviderBasedProject(this._workspace, this._projectId, WebInspector.projectTypes.Debugger, "");
    debuggerModel.addEventListener(WebInspector.DebuggerModel.Events.GlobalObjectCleared, this._debuggerReset, this);
    this._debuggerReset();
}

WebInspector.DefaultScriptMapping._scriptSymbol = Symbol("symbol");

/**
 * @param {!WebInspector.UISourceCode} uiSourceCode
 * @return {?WebInspector.Script}
 */
WebInspector.DefaultScriptMapping.scriptForUISourceCode = function(uiSourceCode)
{
    return uiSourceCode[WebInspector.DefaultScriptMapping._scriptSymbol] || null;
}

WebInspector.DefaultScriptMapping.prototype = {
    /**
     * @override
     * @param {!WebInspector.DebuggerModel.Location} rawLocation
     * @return {!WebInspector.UILocation}
     */
    rawLocationToUILocation: function(rawLocation)
    {
        var debuggerModelLocation = /** @type {!WebInspector.DebuggerModel.Location} */ (rawLocation);
        var script = debuggerModelLocation.script();
        var uiSourceCode = this._uiSourceCodeForScriptId.get(script.scriptId);
        var lineNumber = debuggerModelLocation.lineNumber - (script.isInlineScriptWithSourceURL() ? script.lineOffset : 0);
        var columnNumber = debuggerModelLocation.columnNumber || 0;
        if (script.isInlineScriptWithSourceURL() && !lineNumber && columnNumber)
            columnNumber -= script.columnOffset;
        return uiSourceCode.uiLocation(lineNumber, columnNumber);
    },

    /**
     * @override
     * @param {!WebInspector.UISourceCode} uiSourceCode
     * @param {number} lineNumber
     * @param {number} columnNumber
     * @return {?WebInspector.DebuggerModel.Location}
     */
    uiLocationToRawLocation: function(uiSourceCode, lineNumber, columnNumber)
    {
        var scriptId = this._scriptIdForUISourceCode.get(uiSourceCode);
        var script = this._debuggerModel.scriptForId(scriptId);
        if (script.isInlineScriptWithSourceURL())
            return this._debuggerModel.createRawLocation(script, lineNumber + script.lineOffset, lineNumber ? columnNumber : columnNumber + script.columnOffset);
        return this._debuggerModel.createRawLocation(script, lineNumber, columnNumber);
    },

    /**
     * @param {!WebInspector.Script} script
     */
    addScript: function(script)
    {
        var name = WebInspector.ParsedURL.extractName(script.sourceURL);
        var url = "debugger:///VM" + script.scriptId + (name ? " " + name : "");

        var uiSourceCode = this._project.createUISourceCode(url, WebInspector.resourceTypes.Script);
        uiSourceCode[WebInspector.DefaultScriptMapping._scriptSymbol] = script;
        this._uiSourceCodeForScriptId.set(script.scriptId, uiSourceCode);
        this._scriptIdForUISourceCode.set(uiSourceCode, script.scriptId);
        this._project.addUISourceCodeWithProvider(uiSourceCode, script);

        this._debuggerWorkspaceBinding.setSourceMapping(this._debuggerModel.target(), uiSourceCode, this);
        this._debuggerWorkspaceBinding.pushSourceMapping(script, this);
    },

    /**
     * @override
     * @return {boolean}
     */
    isIdentity: function()
    {
        return true;
    },

    /**
     * @override
     * @param {!WebInspector.UISourceCode} uiSourceCode
     * @param {number} lineNumber
     * @return {boolean}
     */
    uiLineHasMapping: function(uiSourceCode, lineNumber)
    {
        return true;
    },

    _debuggerReset: function()
    {
        /** @type {!Map.<string, !WebInspector.UISourceCode>} */
        this._uiSourceCodeForScriptId = new Map();
        this._scriptIdForUISourceCode = new Map();
        this._project.reset();
    },

    dispose: function()
    {
        this._project.dispose();
    }
}

/**
 * @param {!WebInspector.Target} target
 * @return {string}
 */
WebInspector.DefaultScriptMapping.projectIdForTarget = function(target)
{
    return "debugger:" + target.id();
}
