//
//  MBIMSendMessageOperation.m
//  kordophoned
//
//  Created by James Magahern on 11/13/18.
//  Copyright © 2018 James Magahern. All rights reserved.
//

#import "MBIMSendMessageOperation.h"

#import "IMCore_ClassDump.h"

@implementation MBIMSendMessageOperation

+ (void)load { [super load]; }

+ (NSString *)endpointName
{
    return @"sendMessage";
}

- (BOOL)_sendMessage:(NSString *)messageBody toHandles:(NSArray<NSString *> *)handleIDs attachmentGUIDs:(NSArray<NSString *> *)guids
{
    __block BOOL result = YES;
    dispatch_sync([[self class] sharedIMAccessQueue], ^{
        IMAccount *iMessageAccount = [[IMAccountController sharedInstance] bestAccountForService:[IMServiceImpl iMessageService]];
        
        NSMutableArray<IMHandle *> *handles = [NSMutableArray array];
        for (NSString *handleID in handleIDs) {
            IMHandle *handle = [iMessageAccount imHandleWithID:handleID];
            if (handle) {
                [handles addObject:handle];
            } else {
                MBIMLogError(@"MBIMSendMessageOperation: Invalid handle ID: %@", handleID);
            }
        }
        
        IMChat *chat = nil;
        if (handles.count == 1) {
            // Single recipient
            IMHandle *handle = [handles firstObject];
            chat = [[IMChatRegistry sharedInstance] existingChatForIMHandle:handle];
            if (chat == nil) {
                MBIMLogInfo(@"MBIMSendMessageOperation: Creating chat with handle: %@", handle);
                chat = [[IMChatRegistry sharedInstance] chatForIMHandle:handle];
            }
        } else if (handles.count > 1) {
            // Group chat
            chat = [[IMChatRegistry sharedInstance] existingChatForIMHandles:handles allowRetargeting:NO groupID:nil displayName:nil joinedChatsOnly:YES];
            if (chat == nil) {
                MBIMLogInfo(@"MBIMSendMessageOperation: Creating group chat with handles: %@", handles);
                chat = [[IMChatRegistry sharedInstance] chatForIMHandles:handles];
            }
        } else {
            // No handles?
            result = NO;
        }
        
        if (chat) {
            result = [self _sendMessage:messageBody toChat:chat attachmentGUIDs:guids];
        } else {
            result = NO;
        }
    });
    
    return result;
}

- (BOOL)_sendMessage:(NSString *)messageBody toChatWithGUID:(NSString *)chatGUID attachmentGUIDs:(NSArray<NSString *> *)guids
{
    __block BOOL result = YES;
    dispatch_sync([[self class] sharedIMAccessQueue], ^{
        IMChat *chat = [[IMChatRegistry sharedInstance] existingChatWithGUID:chatGUID];
        if (!chat) {
            MBIMLogInfo(@"Chat does not exist: %@", chatGUID);
            result = NO;
        } else {
            result = [self _sendMessage:messageBody toChat:chat attachmentGUIDs:guids];
        }
    });
    
    return result;
}

- (BOOL)_sendMessage:(NSString *)messageBody toChat:(IMChat *)chat attachmentGUIDs:(NSArray<NSString *> *)guids
{
    dispatch_assert_queue([[self class] sharedIMAccessQueue]);
    
    BOOL result = YES;
    
    // TODO: chat might not be an iMessage chat!
    IMAccount *iMessageAccount = [[IMAccountController sharedInstance] bestAccountForService:[IMServiceImpl iMessageService]];
    IMHandle *senderHandle = [iMessageAccount loginIMHandle];
    
    NSAttributedString *replyAttrString = [[NSAttributedString alloc] initWithString:messageBody];
    NSAttributedString *attrStringWithFileTransfers = IMCreateSuperFormatStringWithAppendedFileTransfers(replyAttrString, guids);
    
    IMMessage *reply = [IMMessage fromMeIMHandle:senderHandle
                                        withText:attrStringWithFileTransfers
                               fileTransferGUIDs:guids
                                           flags:(kIMMessageFinished | kIMMessageIsFromMe)];
    
    for (NSString *guid in [reply fileTransferGUIDs]) {
        [[IMFileTransferCenter sharedInstance] assignTransfer:guid toHandle:chat.recipient];
    }
    
    [chat sendMessage:reply];
    return result;
}

- (void)main
{
    NSObject<HTTPResponse> *response = [[HTTPErrorResponse alloc] initWithErrorCode:500];
    
    NSError *error = nil;
    NSDictionary *args = [NSJSONSerialization JSONObjectWithData:self.requestBodyData options:0 error:&error];
    if (error || args.count == 0) {
        self.serverCompletionBlock(response);
        return;
    }
    
    NSString *messageBody = [args objectForKey:@"body"];
    if (!messageBody) {
        self.serverCompletionBlock(response);
        return;
    }
    
    NSArray *transferGUIDs = [args objectForKey:@"fileTransferGUIDs"];
    if (!transferGUIDs) {
        transferGUIDs = @[];
    }
    
    BOOL result = NO;
    NSString *guid = [args objectForKey:@"guid"];
    NSArray<NSString *> *handles = [args objectForKey:@"handles"];
    if (guid) {
        result = [self _sendMessage:messageBody toChatWithGUID:guid attachmentGUIDs:transferGUIDs];
    } else if ([handles count] > 0) {
        result = [self _sendMessage:messageBody toHandles:handles attachmentGUIDs:transferGUIDs];
    }
    
    if (result) {
        response = [[HTTPErrorResponse alloc] initWithErrorCode:200];
    }
    
    self.serverCompletionBlock(response);
}

@end