#include <time.h>

#include <emscripten.h>

#include "wasmdutil.h"
#include "dbgutil.h"
#include "LocalizedStrIncludes.h"

typedef struct _WasmDUtilCtxt {
    XW_DUtilCtxt super;
} WasmDUtilCtxt;

static XP_U32
wasm_dutil_getCurSeconds( XW_DUtilCtxt* XP_UNUSED(duc), XWEnv XP_UNUSED(xwe) )
{
    return (XP_U32)time(NULL);
}

static const XP_UCHAR*
wasm_dutil_getUserString( XW_DUtilCtxt* duc, XWEnv xwe, XP_U16 code )
{
    switch( code ) {
    case STRD_REMAINING_TILES_ADD:
        return (XP_UCHAR*)"+ %d [all remaining tiles]";
    case STRD_UNUSED_TILES_SUB:
        return (XP_UCHAR*)"- %d [unused tiles]";
    case STR_COMMIT_CONFIRM:
        return (XP_UCHAR*)"Are you sure you want to commit the current move?\n";
    case STR_SUBMIT_CONFIRM:
        return (XP_UCHAR*)"Submit the current move?\n";
    case STRD_TURN_SCORE:
        return (XP_UCHAR*)"Score for turn: %d\n";
    case STR_BONUS_ALL:
        return (XP_UCHAR*)"Bonus for using all tiles: 50\n";
    case STR_PENDING_PLAYER:
        return (XP_UCHAR*)"(remote)";
    case STRD_TIME_PENALTY_SUB:
        return (XP_UCHAR*)" - %d [time]";
        /* added.... */
    case STRD_CUMULATIVE_SCORE:
        return (XP_UCHAR*)"Cumulative score: %d\n";
    case STRS_TRAY_AT_START:
        return (XP_UCHAR*)"Tray at start: %s\n";
    case STRS_MOVE_DOWN:
        return (XP_UCHAR*)"move (from %s down)\n";
    case STRS_MOVE_ACROSS:
        return (XP_UCHAR*)"move (from %s across)\n";
    case STRS_NEW_TILES:
        return (XP_UCHAR*)"New tiles: %s\n";
    case STRSS_TRADED_FOR:
        return (XP_UCHAR*)"Traded %s for %s.";
    case STR_PASS:
        return (XP_UCHAR*)"pass\n";
    case STR_PHONY_REJECTED:
        return (XP_UCHAR*)"Illegal word in move; turn lost!\n";

    case STRD_ROBOT_TRADED:
        return (XP_UCHAR*)"%d tiles traded this turn.";
    case STR_ROBOT_MOVED:
        return (XP_UCHAR*)"The robot \"%s\" moved:\n";
    case STRS_REMOTE_MOVED:
        return (XP_UCHAR*)"Remote player \"%s\" moved:\n";
#ifndef XWFEATURE_STANDALONE_ONLY
    case STR_LOCALPLAYERS:
        return (XP_UCHAR*)"Local players";
    case STR_REMOTE:
        return (XP_UCHAR*)"Remote";
#endif
    case STR_TOTALPLAYERS:
        return (XP_UCHAR*)"Total players";

    case STRS_VALUES_HEADER:
        return (XP_UCHAR*)"%s counts/values:\n";

    case STRD_REMAINS_HEADER:
        return (XP_UCHAR*)"%d tiles left in pool.";
    case STRD_REMAINS_EXPL:
        return (XP_UCHAR*)"%d tiles left in pool and hidden trays:\n";

    case STRSD_RESIGNED:
        return "[Resigned] %s: %d";
    case STRSD_WINNER:
        return "[Winner] %s: %d";
    case STRDSD_PLACER:
        return "[#%d] %s: %d";
    case STR_DUP_MOVED:
        return (XP_UCHAR*)"Duplicate turn complete. Scores:\n";
    case STR_DUP_CLIENT_SENT:
        return "This device has sent its moves to the host. When all players "
            "have sent their moves it will be your turn again.";
    case STRDD_DUP_HOST_RECEIVED:
        return "%d of %d players have reported their moves.";
    case STRD_DUP_TRADED:
        return "No moves made; traded %d tiles";
    case STRSD_DUP_ONESCORE:
        return "%s: %d points\n";

    default:
        XP_LOGF( "%s(code=%d)", __func__, code );
        return (XP_UCHAR*)"unknown code";
    }
}

static const XP_UCHAR*
wasm_dutil_getUserQuantityString( XW_DUtilCtxt* duc, XWEnv xwe, XP_U16 code,
                                  XP_U16 quantity )
{
    LOG_FUNC();
    return NULL;
}

static void
base16Encode( const uint8_t* data, int dataLen, char* out, int outLen )
{
    int used = 0;
    for ( int ii = 0; ii < dataLen; ++ii ) {
        uint8_t byt = data[ii];
        out[used++] = 'A' + ((byt >> 4) & 0x0F);
        out[used++] = 'A' + (byt & 0x0F);
    }
    out[used] = '\0';
}

static void
base16Decode( uint8_t* decodeBuf, int len, const char* str )
{
    int offset = 0;
    for ( ; ; ) {
        char chr = *str++;
        if ( chr < 'A' || chr > ('A' + 16) ) {
            break;
        }
        uint8_t byt = (chr - 'A') << 4;
        chr = *str++;
        if ( chr < 'A' || chr > ('A' + 16) ) {
            break;
        }
        byt |= chr - 'A';
        decodeBuf[offset++] = byt;
    }
    XP_LOGFF( "offset: %d; len: %d", offset, len );
    XP_ASSERT( offset == len );
}

/* static void testBase16() */
/* { */
/*     const XP_U8 testBuf[] = {0x03, 0x04, 0x78, 0xF8, 0x99 }; */

/*     XP_UCHAR chars[(VSIZE(testBuf) * 2) + 1]; */
/*     base16Encode( testBuf, VSIZE(testBuf), chars, sizeof(chars) ); */

/*     int len = XP_STRLEN( chars ); */
/*     XP_U8 decodeBuf[len / 2]; */
/*     base16Decode( decodeBuf, VSIZE(decodeBuf), chars ); */

/*     XP_ASSERT( 0 == XP_MEMCMP( testBuf, decodeBuf, VSIZE(testBuf) ) ); */
/* } */

static void
wasm_dutil_storeStream( XW_DUtilCtxt* duc, XWEnv xwe, const XP_UCHAR* key,
                        XWStreamCtxt* data )
{
    LOG_FUNC();
    XP_ASSERT(0);
}

static void
wasm_dutil_loadStream( XW_DUtilCtxt* duc, XWEnv xwe, const XP_UCHAR* key,
                       const XP_UCHAR* keySuffix, XWStreamCtxt* inOut )
{
    LOG_FUNC();
    XP_ASSERT(0);
}

EM_JS(const char*, get_stored_value, (const char* key), {
        var result = null;
        var jsKey = UTF8ToString(key);
        var jsString = localStorage.getItem(jsKey);
        if ( jsString != null ) {
            var lengthBytes = lengthBytesUTF8(jsString)+1;
            var result = _malloc(lengthBytes);
            stringToUTF8(jsString, result, lengthBytes);
        }
        return result;
    });

EM_JS(void, set_stored_value, (const char* key, const char* val), {
        var jsKey = UTF8ToString(key);
        var jsVal = UTF8ToString(val);
        var jsString = localStorage.setItem(jsKey, jsVal);
    });

/* EM_JS(void, clear_stored, (), { */
/*         localStorage.clear(); */
/*     }); */

static void
wasm_dutil_loadPtr( XW_DUtilCtxt* duc, XWEnv xwe, const XP_UCHAR* key,
                    const XP_UCHAR* keySuffix, void* data, XP_U16* lenp )
{
    XP_LOGFF( "(key: %s, keySuffix: %s)", key, keySuffix );

    const char* val = get_stored_value(key);
    XP_LOGFF( "get_stored_value(%s) => %s", key, val );
    if ( !!val ) {
        size_t len = XP_STRLEN(val);
        XP_ASSERT( (len % 2) == 0 );
        XP_U8 decodeBuf[len/2];
        len = VSIZE(decodeBuf);
        if ( len <= *lenp ) {
            base16Decode( decodeBuf, len, val );
            XP_MEMCPY( data, decodeBuf, len );
        }
        *lenp = len;
        free( (void*)val );
    } else {
        *lenp = 0;              /* signal failure */
    }
    LOG_RETURN_VOID();
}

static void
wasm_dutil_storePtr( XW_DUtilCtxt* duc, XWEnv xwe, const XP_UCHAR* key,
                      const void* data, XP_U16 len )
{
    XP_LOGFF( "(key: %s; len: %d)", key, len );

    XP_UCHAR out[len*2+1];
    base16Encode( data, len, out, sizeof(out) );

    set_stored_value( key, out );
    /* const char* tmp = get_stored_value( key ); */
    /* XP_LOGFF( "TEST: got back %s for key %s", tmp, key ); */

    LOG_RETURN_VOID();
}

static const XP_UCHAR*
wasm_dutil_getDevID( XW_DUtilCtxt* duc, XWEnv XP_UNUSED(xwe), DevIDType* typ )
{
    LOG_FUNC();
    return NULL;
}

static void
wasm_dutil_deviceRegistered( XW_DUtilCtxt* duc, XWEnv XP_UNUSED(xwe), DevIDType typ,
                             const XP_UCHAR* idRelay )
{
    LOG_FUNC();
}

static XP_UCHAR*
wasm_dutil_md5sum( XW_DUtilCtxt* duc, XWEnv xwe, const XP_U8* ptr,
                   XP_U16 len )
{
    LOG_FUNC();
    return NULL;
}

static void
wasm_dutil_notifyPause( XW_DUtilCtxt* XP_UNUSED(duc), XWEnv XP_UNUSED(xwe),
                         XP_U32 XP_UNUSED_DBG(gameID),
                         DupPauseType XP_UNUSED_DBG(pauseTyp),
                         XP_U16 XP_UNUSED_DBG(pauser),
                         const XP_UCHAR* XP_UNUSED_DBG(name),
                         const XP_UCHAR* XP_UNUSED_DBG(msg) )
{
    LOG_FUNC();
}

static void
wasm_dutil_onDupTimerChanged( XW_DUtilCtxt* XP_UNUSED(duc), XWEnv XP_UNUSED(xwe),
                              XP_U32 XP_UNUSED_DBG(gameID),
                              XP_U32 XP_UNUSED_DBG(oldVal),
                              XP_U32 XP_UNUSED_DBG(newVal) )
{
    LOG_FUNC();
}

static void
wasm_dutil_onInviteReceived( XW_DUtilCtxt* duc, XWEnv XP_UNUSED(xwe),
                             const NetLaunchInfo* nli )
{
    LOG_FUNC();
}

static void
wasm_dutil_onMessageReceived( XW_DUtilCtxt* duc, XWEnv XP_UNUSED(xwe),
                               XP_U32 gameID, const CommsAddrRec* from,
                               XWStreamCtxt* stream )
{
    LOG_FUNC();
}

static void
wasm_dutil_onGameGoneReceived( XW_DUtilCtxt* duc, XWEnv XP_UNUSED(xwe),
                               XP_U32 gameID, const CommsAddrRec* from )
{
    LOG_FUNC();
}

XW_DUtilCtxt*
wasm_dutil_make( MPFORMAL VTableMgr* vtMgr, void* closure )
{
    WasmDUtilCtxt* result = XP_CALLOC( mpool, sizeof(*result) );

    dutil_super_init( MPPARM(mpool) &result->super );

    result->super.vtMgr = vtMgr;
    result->super.closure = closure;

# define SET_PROC(nam) \
    result->super.vtable.m_dutil_ ## nam = wasm_dutil_ ## nam;

    SET_PROC(getCurSeconds);
    SET_PROC(getUserString);
    SET_PROC(getUserQuantityString);
    SET_PROC(storeStream);
    SET_PROC(loadStream);
    SET_PROC(storePtr);
    SET_PROC(loadPtr);

#ifdef XWFEATURE_SMS
    SET_PROC(phoneNumbersSame);
#endif

#ifdef XWFEATURE_DEVID
    SET_PROC(getDevID);
    SET_PROC(deviceRegistered);
#endif

#ifdef COMMS_CHECKSUM
    SET_PROC(md5sum);
#endif

    SET_PROC(notifyPause);
    SET_PROC(onDupTimerChanged);
    SET_PROC(onInviteReceived);
    SET_PROC(onMessageReceived);
    SET_PROC(onGameGoneReceived);

# undef SET_PROC

    assertTableFull( &result->super.vtable, sizeof(result->super.vtable), "wasmutil" );

    /* clear_stored(); */
    /* testBase16(); */

    LOG_RETURNF( "%p", &result->super );
    return &result->super;
}

void
wasm_dutil_destroy( XW_DUtilCtxt* dutil )
{
    XP_ASSERT(0);
}