#import <Cocoa/Cocoa.h>
#include <stdlib.h>
#include <string.h>

// cdropPasteboardChangeCount returns the general pasteboard's monotonic change
// counter. Polling it is the cheap way to detect a copy without a callback API.
long cdropPasteboardChangeCount(void) {
    return (long)[[NSPasteboard generalPasteboard] changeCount];
}

// cdropPasteboardReadText returns a malloc'd UTF-8 copy of the pasteboard's
// plain-text payload (caller frees), or NULL when there is no text (image /
// file only). It sets *sensitive to 1 when a privacy marker type is present —
// org.nspasteboard.{Concealed,Transient,AutoGenerated}Type — so the upload
// policy can skip it. (Most password managers set no marker; this is a
// best-effort secondary guard behind the server's short TTL.)
char *cdropPasteboardReadText(int *sensitive) {
    NSPasteboard *pb = [NSPasteboard generalPasteboard];
    *sensitive = 0;
    for (NSString *type in pb.types) {
        if ([type isEqualToString:@"org.nspasteboard.ConcealedType"] ||
            [type isEqualToString:@"org.nspasteboard.TransientType"] ||
            [type isEqualToString:@"org.nspasteboard.AutoGeneratedType"]) {
            *sensitive = 1;
            break;
        }
    }
    NSString *s = [pb stringForType:NSPasteboardTypeString];
    if (s == nil) { return NULL; }
    const char *utf8 = [s UTF8String];
    if (utf8 == NULL) { return NULL; }
    return strdup(utf8);
}

// cdropPasteboardWriteText replaces the pasteboard's contents with plain text.
void cdropPasteboardWriteText(const char *text) {
    NSString *s = [NSString stringWithUTF8String:text];
    if (s == nil) { return; }
    NSPasteboard *pb = [NSPasteboard generalPasteboard];
    [pb clearContents];
    [pb setString:s forType:NSPasteboardTypeString];
}