/*
	BASS simple playback test
	Copyright (c) 1999-2019 Un4seen Developments Ltd.
*/

#include <windows.h>
#include <commctrl.h>
#include <stdio.h>
#include "bass.h"

HWND win = NULL;

HSTREAM *strs = NULL;
int strc = 0;
HMUSIC *mods = NULL;
int modc = 0;
HSAMPLE *sams = NULL;
int samc = 0;

// display error messages
void Error(const char *es)
{
	char mes[200];
	sprintf(mes, "%s\n(error code: %d)", es, BASS_ErrorGetCode());
	MessageBox(win, mes, 0, 0);
}

// messaging macros
#define MESS(id,m,w,l) SendDlgItemMessage(win,id,m,(WPARAM)(w),(LPARAM)(l))
#define STLM(m,w,l) MESS(10,m,w,l)
#define MLM(m,w,l) MESS(20,m,w,l)
#define SLM(m,w,l) MESS(30,m,w,l)
#define GETSTR() STLM(LB_GETCURSEL,0,0)
#define GETMOD() MLM(LB_GETCURSEL,0,0)
#define GETSAM() SLM(LB_GETCURSEL,0,0)

INT_PTR CALLBACK dialogproc(HWND h, UINT m, WPARAM w, LPARAM l)
{
	static OPENFILENAME ofn;

	switch (m) {
		case WM_TIMER:
			{
				// update the CPU usage display
				char text[10];
				sprintf(text, "%.2f", BASS_GetCPU());
				MESS(40, WM_SETTEXT, 0, text);
				// update volume slider in case it's been changed outside of the app
				MESS(43, TBM_SETPOS, 1, BASS_GetVolume() * 100);
			}
			break;

		case WM_COMMAND:
			switch (LOWORD(w)) {
				case IDCANCEL:
					EndDialog(h, 0);
					break;

				case 14:
					{
						char file[MAX_PATH] = "";
						HSTREAM str;
						ofn.lpstrFilter = "Streamable files (wav/aif/mp3/mp2/mp1/ogg)\0*.wav;*.aif;*.mp3;*.mp2;*.mp1;*.ogg\0All files\0*.*\0\0";
						ofn.lpstrFile = file;
						if (GetOpenFileName(&ofn)) {
							if (str = BASS_StreamCreateFile(FALSE, file, 0, 0, 0)) {
								strc++;
								strs = (HSTREAM*)realloc((void*)strs, strc * sizeof(*strs));
								strs[strc - 1] = str;
								STLM(LB_ADDSTRING, 0, strrchr(file, '\\') + 1);
							} else
								Error("Can't open stream");
						}
					}
					break;
				case 15:
					{
						int s = GETSTR();
						if (s != LB_ERR) {
							STLM(LB_DELETESTRING, s, 0);
							BASS_StreamFree(strs[s]); // free the stream
							strc--;
							memcpy(strs + s, strs + s + 1, (strc - s) * sizeof(*strs));
						}
					}
					break;
				case 11:
					{
						int s = GETSTR();
						if (s != LB_ERR)
							if (!BASS_ChannelPlay(strs[s], FALSE)) // play the stream (continue from current position)
								Error("Can't play stream");
					}
					break;
				case 12:
					{
						int s = GETSTR();
						if (s != LB_ERR) BASS_ChannelStop(strs[s]); // stop the stream
					}
					break;
				case 13:
					{
						int s = GETSTR();
						if (s != LB_ERR) BASS_ChannelPlay(strs[s], TRUE); // play the stream from the start
					}
					break;

				case 24:
					{
						char file[MAX_PATH] = "";
						HMUSIC mod;
						ofn.lpstrFilter = "MOD music files (mo3/xm/mod/s3m/it/mtm/umx)\0*.mo3;*.xm;*.mod;*.s3m;*.it;*.mtm;*.umx\0All files\0*.*\0\0";
						ofn.lpstrFile = file;
						if (GetOpenFileName(&ofn)) {
							// load a music from "file" with ramping enabled
							if (mod = BASS_MusicLoad(FALSE, file, 0, 0, BASS_MUSIC_RAMPS, 1)) {
								modc++;
								mods = (HMUSIC*)realloc((void*)mods, modc * sizeof(*mods));
								mods[modc - 1] = mod;
								MLM(LB_ADDSTRING, 0, strrchr(file, '\\') + 1);
							} else
								Error("Can't load music");
						}
					}
					break;
				case 25:
					{
						int s = GETMOD();
						if (s != LB_ERR) {
							MLM(LB_DELETESTRING, s, 0);
							BASS_MusicFree(mods[s]); // free the music
							modc--;
							memcpy(mods + s, mods + s + 1, (modc - s) * sizeof(*mods));
						}
					}
					break;
				case 21:
					{
						int s = GETMOD();
						if (s != LB_ERR)
							if (!BASS_ChannelPlay(mods[s], FALSE)) // play the music (continue from current position)
								Error("Can't play music");
					}
					break;
				case 22:
					{
						int s = GETMOD();
						if (s != LB_ERR) BASS_ChannelStop(mods[s]); // stop the music
					}
					break;
				case 23:
					{
						int s = GETMOD();
						if (s != LB_ERR) BASS_ChannelPlay(mods[s], TRUE); // play the music from the start
					}
					break;

				case 32:
					{
						char file[MAX_PATH] = "";
						HSAMPLE sam;
						ofn.lpstrFilter = "Sample files (wav/aif)\0*.wav;*.aif\0All files\0*.*\0\0";
						ofn.lpstrFile = file;
						if (GetOpenFileName(&ofn)) {
							/* Load a sample from "file" and give it a max of 3 simultaneous
								playings using playback position as override decider */
							if (sam = BASS_SampleLoad(FALSE, file, 0, 0, 3, BASS_SAMPLE_OVER_POS)) {
								samc++;
								sams = (HSAMPLE*)realloc((void*)sams, samc * sizeof(*sams));
								sams[samc - 1] = sam;
								SLM(LB_ADDSTRING, 0, strrchr(file, '\\') + 1);
							} else
								Error("Can't load sample");
						}
					}
					break;
				case 33:
					{
						int s = GETSAM();
						if (s != LB_ERR) {
							SLM(LB_DELETESTRING, s, 0);
							BASS_SampleFree(sams[s]); // free the sample
							samc--;
							memcpy(sams + s, sams + s + 1, (samc - s) * sizeof(*sams));
						}
					}
					break;
				case 31:
					{
						int s = GETSAM();
						if (s != LB_ERR) {
							// play the sample (at default rate, volume=50%, random pan position)
							HCHANNEL ch = BASS_SampleGetChannel(sams[s], FALSE);
							BASS_ChannelSetAttribute(ch, BASS_ATTRIB_VOL, 0.5f);
							BASS_ChannelSetAttribute(ch, BASS_ATTRIB_PAN, ((rand() % 201) - 100) / 100.f);
							if (!BASS_ChannelPlay(ch, FALSE))
								Error("Can't play sample");
						}
					}
					break;

				case 41:
					BASS_Pause(); // pause output
					break;
				case 42:
					BASS_Start(); // resume output
					break;
				case 44:
					BASS_SetConfig(BASS_CONFIG_UPDATETHREADS, MESS(44, BM_GETCHECK, 0, 0) ? 2 : 1); // set 1 or 2 update threads
					break;
			}
			break;

		case WM_HSCROLL:
			if (l && LOWORD(w) != SB_THUMBPOSITION && LOWORD(w) != SB_ENDSCROLL) {
				int p = SendMessage((HWND)l, TBM_GETPOS, 0, 0);
				switch (GetDlgCtrlID((HWND)l)) {
					case 16:
						BASS_SetConfig(BASS_CONFIG_GVOL_STREAM, p * 100); // global stream volume (0-10000)
						break;
					case 26:
						BASS_SetConfig(BASS_CONFIG_GVOL_MUSIC, p * 100); // global MOD volume (0-10000)
						break;
					case 34:
						BASS_SetConfig(BASS_CONFIG_GVOL_SAMPLE, p * 100); // global sample volume (0-10000)
						break;
					case 43:
						BASS_SetVolume(p / 100.f); // output volume (0-1)
						break;
				}
			}
			break;

		case WM_INITDIALOG:
			win = h;
			// initialize default output device
			if (!BASS_Init(-1, 44100, 0, win, NULL)) {
				Error("Can't initialize device");
				EndDialog(win, 0);
				return 0;
			}
			// initialize volume sliders
			MESS(16, TBM_SETRANGE, 1, MAKELONG(0, 100));
			MESS(16, TBM_SETPOS, 1, 100);
			MESS(26, TBM_SETRANGE, 1, MAKELONG(0, 100));
			MESS(26, TBM_SETPOS, 1, 100);
			MESS(34, TBM_SETRANGE, 1, MAKELONG(0, 100));
			MESS(34, TBM_SETPOS, 1, 100);
			MESS(43, TBM_SETRANGE, 1, MAKELONG(0, 100));
			MESS(43, TBM_SETPOS, 1, BASS_GetVolume() * 100);
			SetTimer(h, 1, 500, NULL);
			memset(&ofn, 0, sizeof(ofn));
			ofn.lStructSize = sizeof(ofn);
			ofn.hwndOwner = h;
			ofn.nMaxFile = MAX_PATH;
			ofn.Flags = OFN_HIDEREADONLY | OFN_EXPLORER;
			return 1;

		case WM_DESTROY:
			KillTimer(h, 1);
			BASS_Free(); // close output
			break;
	}
	return 0;
}

int PASCAL WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
	// check the correct BASS was loaded
	if (HIWORD(BASS_GetVersion()) != BASSVERSION) {
		MessageBox(0, "An incorrect version of BASS.DLL was loaded", 0, MB_ICONERROR);
		return 0;
	}

	// enable "Default" device that follows default device changes
	BASS_SetConfig(BASS_CONFIG_DEV_DEFAULT, 1);

	// display the window
	DialogBox(hInstance, MAKEINTRESOURCE(1000), NULL, dialogproc);

	return 0;
}