#include "common/private_desktop.h"
#include "common/backend.h"
#include "common/desktop.h"

#include <string.h>

/* Large enough for any path the platform APIs return. */
#define DESKTOP_STR_MAX 4096

/* An RFC 3986 scheme, then ':', and no control characters anywhere. */
static bool uri_valid(const char *uri)
{
    unsigned char c = (unsigned char)uri[0];
    if ((unsigned)((c | 32) - 'a') >= 26) return false;
    const char *p = uri + 1;
    for (; *p != ':'; p++) {
        c = (unsigned char)*p;
        bool alpha = (unsigned)((c | 32) - 'a') < 26;
        bool digit = (unsigned)(c - '0') < 10;
        if (!alpha && !digit && c != '+' && c != '-' && c != '.') return false;
    }
    for (; *p; p++) {
        c = (unsigned char)*p;
        if (c < 0x20 || c == 0x7f) return false;
    }
    return true;
}

/* Copy len bytes and a NUL when they fit, and report the full length. */
static size_t copy_out(char *out, size_t cap, const char *s, size_t len)
{
    if (len && len < cap) {
        memcpy(out, s, len);
        out[len] = '\0';
    }
    return len;
}

bool yasl_private_display_open_uri(struct yasl_private_display *d, const char *uri)
{
    if (!d || !uri || !uri_valid(uri)) return false;
    return desktop_open_uri(uri);
}

bool yasl_private_display_notify(struct yasl_private_display *d, const char *title, const char *body)
{
    if (!d || !title) return false;
    return desktop_notify(d->app_id, title, body ? body : "");
}

uint32_t yasl_private_display_appearance(struct yasl_private_display *d)
{
    return d ? desktop_appearance() : 0;
}

bool yasl_private_surface_bell(struct yasl_surface *s)
{
    if (!s || !s->display->ops->surface_bell) return false;
    return s->display->ops->surface_bell(s);
}

size_t yasl_private_executable_path(char *out, size_t cap)
{
    if (!out && cap) return 0;
    char buf[DESKTOP_STR_MAX];
    return copy_out(out, cap, buf, desktop_executable_path(buf, sizeof(buf)));
}

size_t yasl_private_resource_dir(char *out, size_t cap)
{
    if (!out && cap) return 0;
    char buf[DESKTOP_STR_MAX];
    return copy_out(out, cap, buf, desktop_resource_dir(buf, sizeof(buf)));
}

size_t yasl_private_default_locale(char *out, size_t cap)
{
    if (!out && cap) return 0;
    char buf[DESKTOP_STR_MAX];
    return copy_out(out, cap, buf, desktop_default_locale(buf, sizeof(buf)));
}

#include "public_internal.h"
#include "yasl/desktop.h"
#include <errno.h>
bool yasl_open_uri(const char *uri)
{ if(!uri||!uri_valid(uri))return yasl_public_fail(EINVAL);errno=0;return desktop_open_uri(uri)||yasl_public_fail(errno); }
bool yasl_notify(const char *title,const char *body)
{ if(!yasl_public_owner())return false;errno=0;return yasl_private_display_notify(yasl_public_display(),title,body)||yasl_public_fail(errno); }
unsigned yasl_appearance(void) { return yasl_private_display_appearance(yasl_public_display()); }
bool yasl_surface_bell(yasl_surface *s)
{ if(!yasl_public_surface(s,false))return false;errno=0;return yasl_private_surface_bell(s)||yasl_public_fail(errno); }
size_t yasl_executable_path(char *out,size_t cap) { return yasl_private_executable_path(out,cap); }
size_t yasl_resource_dir(char *out,size_t cap) { return yasl_private_resource_dir(out,cap); }
size_t yasl_default_locale(char *out,size_t cap) { return yasl_private_default_locale(out,cap); }