/** 
 * @file llfilepicker_mac.cpp
 * @brief OS-specific file picker
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifdef LL_DARWIN
#import <Cocoa/Cocoa.h>
#include <iostream>
#include "llfilepicker_mac.h"

NSOpenPanel *init_panel(const std::vector<std::string>* allowed_types, unsigned int flags)
{
    int i;
    
    NSOpenPanel *panel = [NSOpenPanel openPanel];
    NSMutableArray *fileTypes = nil;
    
    
    if ( allowed_types && !allowed_types->empty())
    {
        fileTypes = [[NSMutableArray alloc] init];
        
        for (i=0;i<allowed_types->size();++i)
        {
            [fileTypes addObject:
             [NSString stringWithCString:(*allowed_types)[i].c_str()
                                encoding:[NSString defaultCStringEncoding]]];
        }
    }
        
    //[panel setMessage:@"Import one or more files or directories."];
    [panel setAllowsMultipleSelection: ( (flags & F_MULTIPLE)?true:false ) ];
    [panel setCanChooseDirectories: ( (flags & F_DIRECTORY)?true:false ) ];
    [panel setCanCreateDirectories: true];
    [panel setResolvesAliases: true];
    [panel setCanChooseFiles: ( (flags & F_FILE)?true:false )];
    [panel setTreatsFilePackagesAsDirectories: ( flags & F_NAV_SUPPORT ) ];
    
    if (fileTypes)
    {
        [panel setAllowedFileTypes:fileTypes];
    }
    else
    {
        // I suggest it's better to open the last path and let this default to home dir as necessary
        // for consistency with other OS X apps
        //
        //[panel setDirectoryURL: fileURLWithPath(NSHomeDirectory()) ];
    }
    return panel;
}

std::unique_ptr<std::vector<std::string>> doLoadDialog(const std::vector<std::string>* allowed_types, 
                 unsigned int flags)
{
    int result;

    NSOpenPanel *panel = init_panel(allowed_types,flags);
    
    result = [panel runModal];
    
    std::unique_ptr<std::vector<std::string>> outfiles = nullptr;

    if (result == NSOKButton) 
    {
        NSArray *filesToOpen = [panel URLs];
        int count = [filesToOpen count];

        if (count > 0)
        {
            outfiles = std::make_unique<std::vector<std::string>>();
        }

        for (int i=0; i<count; i++) {
            NSString *aFile = [filesToOpen objectAtIndex:i];
            std::string afilestr = [[aFile stringByStandardizingPath] UTF8String];
            outfiles->push_back(std::move(afilestr));
        }
    }
    return outfiles;
}

void doLoadDialogModeless(const std::vector<std::string>* allowed_types,
                 unsigned int flags,
                 void (*callback)(bool, std::vector<std::string> &, void*),
                 void *userdata)
{
    // Note: might need to return and save this panel
    // so that it does not close immediately
    NSOpenPanel *panel = init_panel(allowed_types,flags);
    
    [panel beginWithCompletionHandler:^(NSModalResponse result)
        {
            std::vector<std::string> outfiles;
            if (result == NSOKButton)
            {
                NSArray *filesToOpen = [panel URLs];
                int i, count = [filesToOpen count];
                
                if (count > 0)
                {
                    
                    for (i=0; i<count; i++) {
                        NSString *aFile = [[filesToOpen objectAtIndex:i] path];
                        std::string *afilestr = new std::string([aFile UTF8String]);
                        outfiles.push_back(*afilestr);
                    }
                    callback(true, outfiles, userdata);
                }
                else // no valid result
                {
                    callback(false, outfiles, userdata);
                }
            }
            else // cancel
            {
                callback(false, outfiles, userdata);
            }
        }];
}

std::unique_ptr<std::string> doSaveDialog(const std::string* file, 
                  const std::string* type,
                  const std::string* creator,
                  const std::string* extension,
                  unsigned int flags)
{
    NSSavePanel *panel = [NSSavePanel savePanel]; 
    
    NSString *extensionns = [NSString stringWithCString:extension->c_str() encoding:[NSString defaultCStringEncoding]];
    NSArray *fileType = [extensionns componentsSeparatedByString:@","];
    
    //[panel setMessage:@"Save Image File"]; 
    [panel setTreatsFilePackagesAsDirectories: ( flags & F_NAV_SUPPORT ) ];
    [panel setCanSelectHiddenExtension:true]; 
    [panel setAllowedFileTypes:fileType];
    NSString *fileName = [NSString stringWithCString:file->c_str() encoding:[NSString defaultCStringEncoding]];
    
    std::unique_ptr<std::string> outfile = nullptr;
    NSURL* url = [NSURL fileURLWithPath:fileName];
    [panel setNameFieldStringValue: fileName];
    [panel setDirectoryURL: url];
    if([panel runModal] == 
       NSFileHandlingPanelOKButton) 
    {
        NSURL* url = [panel URL];
        NSString* p = [url path];
        outfile = std::make_unique<std::string>( [p UTF8String] );
        // write the file 
    } 
    return outfile;
}

void doSaveDialogModeless(const std::string* file,
                  const std::string* type,
                  const std::string* creator,
                  const std::string* extension,
                  unsigned int flags,
                  void (*callback)(bool, std::string&, void*),
                  void *userdata)
{
    NSSavePanel *panel = [NSSavePanel savePanel];
    
    NSString *extensionns = [NSString stringWithCString:extension->c_str() encoding:[NSString defaultCStringEncoding]];
    NSArray *fileType = [extensionns componentsSeparatedByString:@","];
    
    //[panel setMessage:@"Save Image File"];
    [panel setTreatsFilePackagesAsDirectories: ( flags & F_NAV_SUPPORT ) ];
    [panel setCanSelectHiddenExtension:true];
    [panel setAllowedFileTypes:fileType];
    NSString *fileName = [NSString stringWithCString:file->c_str() encoding:[NSString defaultCStringEncoding]];
    
    NSURL* url = [NSURL fileURLWithPath:fileName];
    [panel setNameFieldStringValue: fileName];
    [panel setDirectoryURL: url];
    
    
    [panel beginWithCompletionHandler:^(NSModalResponse result)
    {
        if (result == NSOKButton)
        {
            NSURL* url = [panel URL];
            NSString* p = [url path];
            std::string outfile([p UTF8String]);
            
            callback(true, outfile, userdata);
        }
        else // cancel
        {
            std::string outfile;
            callback(false, outfile, userdata);
        }
    }];
}

#endif