#ifdef __APPLE__

#import <AppKit/AppKit.h>

#include "config.hpp"
#include "connector_service.hpp"
#include "platform.hpp"

using connector::ConnectorConfig;
using connector::ConnectorService;

@interface ConnectorAppDelegate : NSObject <NSApplicationDelegate, NSWindowDelegate>
@property(nonatomic, strong) NSWindow* window;
@property(nonatomic, strong) NSTextField* pathField;
@property(nonatomic, strong) NSTextField* statusLabel;
@property(nonatomic, strong) NSArray<NSView*>* pathControls;
@property(nonatomic, strong) NSButton* connectionButton;
@property(nonatomic, assign) ConnectorService* service;
@property(nonatomic, copy) NSString* startupError;
@end

@implementation ConnectorAppDelegate

- (NSTextField*)label:(NSString*)text frame:(NSRect)frame size:(CGFloat)size color:(NSColor*)color {
  NSTextField* label = [[NSTextField alloc] initWithFrame:frame];
  label.stringValue = text;
  label.editable = NO;
  label.bezeled = NO;
  label.drawsBackground = NO;
  label.font = [NSFont systemFontOfSize:size];
  label.textColor = color;
  return label;
}

- (NSButton*)button:(NSString*)title frame:(NSRect)frame action:(SEL)action {
  NSButton* button = [[NSButton alloc] initWithFrame:frame];
  button.title = title;
  button.bezelStyle = NSBezelStyleRounded;
  button.target = self;
  button.action = action;
  return button;
}

- (void)applicationDidFinishLaunching:(NSNotification*)notification {
  (void)notification;
  self.window = [[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 620, 326)
                                            styleMask:NSWindowStyleMaskTitled | NSWindowStyleMaskClosable | NSWindowStyleMaskMiniaturizable
                                              backing:NSBackingStoreBuffered defer:NO];
  self.window.title = @"Spine粒子连接器";
  self.window.delegate = self;
  [self.window center];
  NSView* content = self.window.contentView;
  [content addSubview:[self label:@"Spine粒子连接器" frame:NSMakeRect(28, 268, 560, 34) size:24 color:NSColor.labelColor]];
  [content addSubview:[self label:@"应用打开且连接已启动时，网页可调用本机 Spine 生成工程文件。" frame:NSMakeRect(29, 237, 560, 24) size:14 color:NSColor.secondaryLabelColor]];

  self.statusLabel = [self label:@"" frame:NSMakeRect(29, 201, 560, 24) size:14 color:NSColor.systemGreenColor];
  [content addSubview:self.statusLabel];
  NSTextField* pathLabel = [self label:@"Spine.com 路径" frame:NSMakeRect(29, 162, 130, 24) size:14 color:NSColor.labelColor];
  [content addSubview:pathLabel];
  self.pathField = [[NSTextField alloc] initWithFrame:NSMakeRect(29, 126, 390, 32)];
  self.pathField.placeholderString = @"留空时自动检测 Spine";
  const ConnectorConfig config = connector::load_config();
  self.pathField.stringValue = [NSString stringWithUTF8String:config.spine_executable.c_str()];
  [content addSubview:self.pathField];
  NSButton* browse = [self button:@"选择 Spine.com" frame:NSMakeRect(430, 124, 160, 36) action:@selector(selectSpine:)];
  [content addSubview:browse];
  NSButton* automatic = [self button:@"恢复自动检测" frame:NSMakeRect(29, 78, 130, 36) action:@selector(clearPath:)];
  [content addSubview:automatic];
  NSButton* save = [self button:@"保存路径" frame:NSMakeRect(460, 78, 130, 36) action:@selector(savePath:)];
  save.keyEquivalent = @"\r";
  [content addSubview:save];
  self.pathControls = @[pathLabel, self.pathField, browse, automatic, save];
  self.connectionButton = [self button:@"断开连接" frame:NSMakeRect(460, 25, 130, 36) action:@selector(toggleConnection:)];
  [content addSubview:self.connectionButton];
  [self refreshStatus:nil];
  [self.window makeKeyAndOrderFront:nil];
  [NSApp activateIgnoringOtherApps:YES];
}

- (void)refreshStatus:(id)sender {
  (void)sender;
  self.connectionButton.title = self.service && self.service->running() ? @"断开连接" : @"启动连接";
  if (self.startupError.length > 0) {
    self.statusLabel.stringValue = [@"● 连接器未启动 · " stringByAppendingString:self.startupError];
    self.statusLabel.textColor = NSColor.systemRedColor;
    return;
  }
  if (!self.service || !self.service->running()) {
    self.statusLabel.stringValue = @"● 连接器已断开";
    self.statusLabel.textColor = NSColor.secondaryLabelColor;
    return;
  }
  const std::string spine = connector::find_spine_executable();
  const BOOL showPathControls = spine.empty();
  for (NSView* view in self.pathControls) view.hidden = !showPathControls;
  self.statusLabel.stringValue = spine.empty() ? @"● 连接器运行中 · 未找到 Spine" : @"● 连接器运行中 · Spine 已就绪";
  self.statusLabel.textColor = spine.empty() ? NSColor.systemOrangeColor : NSColor.systemGreenColor;
}

- (void)toggleConnection:(id)sender {
  (void)sender;
  if (self.service && self.service->running()) {
    self.service->stop();
    self.startupError = @"";
  } else if (self.service) {
    std::string error;
    self.service->start(error);
    self.startupError = [NSString stringWithUTF8String:error.c_str()];
  }
  [self refreshStatus:nil];
}

- (void)selectSpine:(id)sender {
  (void)sender;
  NSOpenPanel* panel = [NSOpenPanel openPanel];
  panel.canChooseFiles = YES;
  panel.canChooseDirectories = NO;
  panel.allowsMultipleSelection = NO;
  panel.message = @"请选择 Spine 命令行可执行文件（macOS 通常为 Spine.app/Contents/MacOS/Spine）";
  if ([panel runModal] == NSModalResponseOK) self.pathField.stringValue = panel.URL.path;
}

- (void)clearPath:(id)sender {
  (void)sender;
  self.pathField.stringValue = @"";
  [self savePath:nil];
}

- (void)savePath:(id)sender {
  (void)sender;
  const std::string path = self.pathField.stringValue.UTF8String ?: "";
  if (!path.empty() && !connector::valid_spine_executable(path)) {
    NSAlert* alert = [[NSAlert alloc] init];
    alert.messageText = @"Spine 路径无效";
    alert.informativeText = @"请选择实际存在的 Spine 命令行可执行文件。";
    [alert runModal];
    return;
  }
  try {
    ConnectorConfig config = connector::load_config();
    config.spine_executable = path;
    connector::save_config(config);
    [self refreshStatus:nil];
  } catch (const std::exception& error) {
    NSAlert* alert = [[NSAlert alloc] init];
    alert.messageText = @"保存失败";
    alert.informativeText = [NSString stringWithUTF8String:error.what()];
    [alert runModal];
  }
}

- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication*)sender {
  (void)sender;
  return YES;
}

- (void)applicationWillTerminate:(NSNotification*)notification {
  (void)notification;
  if (self.service) self.service->stop();
}

@end

int main(int argc, char* argv[]) {
  (void)argc;
  (void)argv;
  @autoreleasepool {
    ConnectorService service;
    std::string startup_error;
    service.start(startup_error);
    NSApplication* application = [NSApplication sharedApplication];
    application.activationPolicy = NSApplicationActivationPolicyRegular;
    application.appearance = [NSAppearance appearanceNamed:NSAppearanceNameDarkAqua];
    ConnectorAppDelegate* delegate = [[ConnectorAppDelegate alloc] init];
    delegate.service = &service;
    delegate.startupError = [NSString stringWithUTF8String:startup_error.c_str()];
    application.delegate = delegate;
    [application run];
    service.stop();
  }
  return 0;
}

#endif