/***********************************************************************************
  Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.

  (c) Copyright 1996 - 2002  Gary Henderson (gary.henderson@ntlworld.com),
                             Jerremy Koot (jkoot@snes9x.com)

  (c) Copyright 2002 - 2004  Matthew Kendora

  (c) Copyright 2002 - 2005  Peter Bortas (peter@bortas.org)

  (c) Copyright 2004 - 2005  Joel Yliluoma (http://iki.fi/bisqwit/)

  (c) Copyright 2001 - 2006  John Weidman (jweidman@slip.net)

  (c) Copyright 2002 - 2006  funkyass (funkyass@spam.shaw.ca),
                             Kris Bleakley (codeviolation@hotmail.com)

  (c) Copyright 2002 - 2010  Brad Jorsch (anomie@users.sourceforge.net),
                             Nach (n-a-c-h@users.sourceforge.net),

  (c) Copyright 2002 - 2011  zones (kasumitokoduck@yahoo.com)

  (c) Copyright 2006 - 2007  nitsuja

  (c) Copyright 2009 - 2016  BearOso,
                             OV2


  BS-X C emulator code
  (c) Copyright 2005 - 2006  Dreamer Nom,
                             zones

  C4 x86 assembler and some C emulation code
  (c) Copyright 2000 - 2003  _Demo_ (_demo_@zsnes.com),
                             Nach,
                             zsKnight (zsknight@zsnes.com)

  C4 C++ code
  (c) Copyright 2003 - 2006  Brad Jorsch,
                             Nach

  DSP-1 emulator code
  (c) Copyright 1998 - 2006  _Demo_,
                             Andreas Naive (andreasnaive@gmail.com),
                             Gary Henderson,
                             Ivar (ivar@snes9x.com),
                             John Weidman,
                             Kris Bleakley,
                             Matthew Kendora,
                             Nach,
                             neviksti (neviksti@hotmail.com)

  DSP-2 emulator code
  (c) Copyright 2003         John Weidman,
                             Kris Bleakley,
                             Lord Nightmare (lord_nightmare@users.sourceforge.net),
                             Matthew Kendora,
                             neviksti

  DSP-3 emulator code
  (c) Copyright 2003 - 2006  John Weidman,
                             Kris Bleakley,
                             Lancer,
                             z80 gaiden

  DSP-4 emulator code
  (c) Copyright 2004 - 2006  Dreamer Nom,
                             John Weidman,
                             Kris Bleakley,
                             Nach,
                             z80 gaiden

  OBC1 emulator code
  (c) Copyright 2001 - 2004  zsKnight,
                             pagefault (pagefault@zsnes.com),
                             Kris Bleakley
                             Ported from x86 assembler to C by sanmaiwashi

  SPC7110 and RTC C++ emulator code used in 1.39-1.51
  (c) Copyright 2002         Matthew Kendora with research by
                             zsKnight,
                             John Weidman,
                             Dark Force

  SPC7110 and RTC C++ emulator code used in 1.52+
  (c) Copyright 2009         byuu,
                             neviksti

  S-DD1 C emulator code
  (c) Copyright 2003         Brad Jorsch with research by
                             Andreas Naive,
                             John Weidman

  S-RTC C emulator code
  (c) Copyright 2001 - 2006  byuu,
                             John Weidman

  ST010 C++ emulator code
  (c) Copyright 2003         Feather,
                             John Weidman,
                             Kris Bleakley,
                             Matthew Kendora

  Super FX x86 assembler emulator code
  (c) Copyright 1998 - 2003  _Demo_,
                             pagefault,
                             zsKnight

  Super FX C emulator code
  (c) Copyright 1997 - 1999  Ivar,
                             Gary Henderson,
                             John Weidman

  Sound emulator code used in 1.5-1.51
  (c) Copyright 1998 - 2003  Brad Martin
  (c) Copyright 1998 - 2006  Charles Bilyue'

  Sound emulator code used in 1.52+
  (c) Copyright 2004 - 2007  Shay Green (gblargg@gmail.com)

  S-SMP emulator code used in 1.54+
  (c) Copyright 2016         byuu

  SH assembler code partly based on x86 assembler code
  (c) Copyright 2002 - 2004  Marcus Comstedt (marcus@mc.pp.se)

  2xSaI filter
  (c) Copyright 1999 - 2001  Derek Liauw Kie Fa

  HQ2x, HQ3x, HQ4x filters
  (c) Copyright 2003         Maxim Stepin (maxim@hiend3d.com)

  NTSC filter
  (c) Copyright 2006 - 2007  Shay Green

  GTK+ GUI code
  (c) Copyright 2004 - 2016  BearOso

  Win32 GUI code
  (c) Copyright 2003 - 2006  blip,
                             funkyass,
                             Matthew Kendora,
                             Nach,
                             nitsuja
  (c) Copyright 2009 - 2016  OV2

  Mac OS GUI code
  (c) Copyright 1998 - 2001  John Stiles
  (c) Copyright 2001 - 2011  zones


  Specific ports contains the works of other authors. See headers in
  individual files.


  Snes9x homepage: http://www.snes9x.com/

  Permission to use, copy, modify and/or distribute Snes9x in both binary
  and source form, for non-commercial purposes, is hereby granted without
  fee, providing that this license information and copyright notice appear
  with all copies and any derived work.

  This software is provided 'as-is', without any express or implied
  warranty. In no event shall the authors be held liable for any damages
  arising from the use of this software or it's derivatives.

  Snes9x is freeware for PERSONAL USE only. Commercial users should
  seek permission of the copyright holders first. Commercial use includes,
  but is not limited to, charging money for Snes9x or software derived from
  Snes9x, including Snes9x or derivatives in commercial game bundles, and/or
  using Snes9x as a promotion for your commercial product.

  The copyright holders request that bug fixes and improvements to the code
  should be forwarded to them so everyone can benefit from the modifications
  in future versions.

  Super NES and Super Nintendo Entertainment System are trademarks of
  Nintendo Co., Limited and its subsidiary companies.
 ***********************************************************************************/


#include <stdio.h>
#include <time.h>
#include <string.h>
#include <string>

#include "conffile.h"

#ifdef __WIN32__
#define snprintf _snprintf // needs ANSI compliant name
#endif

#define SORT_SECTIONS_BY_SIZE // output

using namespace std;

bool ConfigFile::defaultAutoAdd = false;
bool ConfigFile::niceAlignment = false;
bool ConfigFile::showComments = true;
bool ConfigFile::alphaSort = true;
bool ConfigFile::timeSort = false;
static ConfigFile* curConfigFile = NULL; // for section_then_key_less

ConfigFile::ConfigFile(void) {
	Clear();
}

void ConfigFile::Clear(void){
    data.clear();
	sectionSizes.ClearSections();
	linectr = 0;
}

bool ConfigFile::LoadFile(const char *filename){
    FSTREAM s;
    bool ret=false;
    const char *n, *n2;

    if((s=OPEN_FSTREAM(filename, "r"))){
        n=filename;
        n2=strrchr(n, '/'); if(n2!=NULL) n=n2+1;
        n2=strrchr(n, '\\'); if(n2!=NULL) n=n2+1;
        LoadFile(new fStream(s), n);
        CLOSE_FSTREAM(s);
        ret = true;
    } else {
        fprintf(stderr, "Couldn't open conffile ");
        perror(filename);
    }
    return ret;
}


void ConfigFile::LoadFile(Stream *r, const char *name){
	curConfigFile = this;
    string l, key, val;
    string section;
    string comment;
    int i, line, line2;
    bool eof;

    line=line2=0;
    section.clear();
    do {
        line=line2++;
        l=r->getline(eof);
        ConfigEntry::trim(l);
        if(l.size()==0) continue;

        if(l[0]=='#' || l[0]==';'){
            // comment
            continue;
        }

        if(l[0]=='['){
            if(*l.rbegin()!=']'){
                if(name) fprintf(stderr, "%s:", name);
                fprintf(stderr, "[%d]: Ignoring invalid section header\n", line);
                continue;
            }
            section.assign(l, 1, l.size()-2);
            continue;
        }

        while(*l.rbegin()=='\\'){
            l.erase(l.size()-1);
            line2++;
            val=r->getline(eof);
            if(eof){
                fprintf(stderr, "Unexpected EOF reading config file");
                if(name) fprintf(stderr, " '%s'", name);
                fprintf(stderr, "\n");
                return;
            }
            ConfigEntry::trim(val);
            l+=val;
        }
        i=l.find('=');
        if(i<0){
            if(name) fprintf(stderr, "%s:", name);
            fprintf(stderr, "[%d]: Ignoring invalid entry\n", line);
            continue;
        }
        key=l.substr(0,i); ConfigEntry::trim(key);
		val=l.substr(i+1); comment = ConfigEntry::trimCommented(val);
		if(val.size() > 0 && val[0]=='"' && *val.rbegin()=='"') val=val.substr(1, val.size()-2);

        ConfigEntry e(line, section, key, val);
		e.comment = comment;
        if(data.erase(e))
			sectionSizes.DecreaseSectionSize(e.section);
        data.insert(e);
		sectionSizes.IncreaseSectionSize(e.section);
    } while(!eof);
	curConfigFile = NULL;
}

bool ConfigFile::SaveTo(const char *filename){
    string section;
    FILE *fp;

    if((fp=fopen(filename, "w"))==NULL){
        fprintf(stderr, "Couldn't write conffile ");
        perror(filename);
        return false;
    }

	curConfigFile = this;
    section.clear();
    set<ConfigEntry, ConfigEntry::line_less> tmp;
    fprintf(fp, "# Config file output by snes9x\n");
    time_t t=time(NULL);
    fprintf(fp, "# %s", ctime(&t));

#ifdef SORT_SECTIONS_BY_SIZE
	std::set<ConfigEntry, ConfigEntry::section_then_key_less> data2;
	for(set<ConfigEntry, ConfigEntry::key_less>::iterator k=data.begin(); k!=data.end(); k++){
		ConfigEntry e (k->line, k->section, k->key, k->val); e.comment = k->comment;
		data2.insert(e);
	}
#else
	#define data2 data
	#define section_then_key_less key_less
#endif

    for(set<ConfigEntry, ConfigEntry::section_then_key_less>::iterator j=data2.begin(); ; j++){
        if(j==data2.end() || j->section!=section){
            if(!tmp.empty()){
                fprintf(fp, "\n[%s]\n", section.c_str());
				unsigned int maxKeyLen=0, maxValLen=0; int maxLeftDiv=0; int maxRightDiv=-1;
				if(niceAlignment){
					for(set<ConfigEntry, ConfigEntry::line_less>::iterator i=tmp.begin(); i!=tmp.end(); i++){
						int len3 = i->key.find_last_of(':');
						maxRightDiv = MAX(maxRightDiv, len3);
						len3 = i->key.length() - len3;
						maxLeftDiv = MAX(maxLeftDiv, len3);
						maxKeyLen = MAX(maxKeyLen, i->key.length()+3);
						if(showComments){
							string o=i->val; ConfigEntry::trim(o);
							unsigned int len = o.length();
							for(signed int j=len-1;j>=0;j--) if(o.at(j)=='#') len++;
							if(o!=i->val) len+=2;
							maxValLen = MAX(maxValLen, len);
						}
					}
					if(maxValLen>48) maxValLen=48; // limit spacing
				}

				for(set<ConfigEntry, ConfigEntry::line_less>::iterator i=tmp.begin(); i!=tmp.end(); i++){
                    string o=i->val; ConfigEntry::trim(o);
                    if(o!=i->val) o="\""+i->val+"\"";
					int off=0, len3=0;
					for(;;){
						int k=o.find('#',off);
						if(k>=0){
							o.insert(k,1,'#'); // re-double any comment characters
							off=k+2;
							if(off<(int)o.length()) continue;
						}
						break;
					}
					if(niceAlignment){
						len3=i->key.find_last_of(':');
						int len3sub=0;
						if(len3 < maxRightDiv){
							for(int j=len3;j<maxRightDiv;j++) fputc(' ',fp);
							len3sub=maxRightDiv-len3;
							len3 = maxRightDiv;
						}
						len3+=maxLeftDiv-i->key.length();
						for(unsigned int j=i->key.length()+len3+3;j<maxKeyLen;j++) fputc(' ',fp);
						fprintf(fp, "%s", i->key.c_str());
						for(int j=0;j<len3-len3sub;j++) fputc(' ',fp);
						fprintf(fp, " = %s", o.c_str());
					} else
						fprintf(fp, "%s = %s", i->key.c_str(), o.c_str());

					if(showComments && !i->comment.empty()){
						if(niceAlignment) for(unsigned int j=o.length();j<maxValLen;j++) fputc(' ',fp);
						fprintf(fp, "  # %s", i->comment.c_str());
					}
					fprintf(fp, "\n");
                }
            }
            if(j==data2.end()) break;
            section=j->section;
            tmp.clear();
        }
        tmp.insert(*j);
    }
	curConfigFile = NULL;

	#undef data2
	#undef section_then_key_less

	if(ferror(fp))
	{
		printf ("Error writing config file %s\n", filename);
	}

    fclose(fp);
    return true;
}


/***********************************************/

string ConfigFile::Get(const char *key){
	set<ConfigEntry, ConfigEntry::key_less>::iterator i;
    i=data.find(ConfigEntry(key));
	i->used=true;
    return i->val;
}
bool ConfigFile::Has(const char *key){
    return data.find(ConfigEntry(key))!=data.end();
}

// exists and isn't completely empty (any side-effects are intentional)
bool ConfigFile::Exists(const char *key){
	const char* val = GetString(key, NULL);
	return val && *val;
}


string ConfigFile::GetString(const char *key, string def){
    if(!Exists(key))
		return def;
    return Get(key);
}

char *ConfigFile::GetString(const char *key, char *out, uint32 outlen){
    if(!Exists(key)) return NULL;
    memset(out, 0, outlen);
    string o=Get(key);
    if(outlen>0){
        outlen--;
        if(o.size()<outlen) outlen=o.size();
        memcpy(out, o.data(), outlen);
    }
    return out;
}

const char *ConfigFile::GetString(const char *key, const char *def){
    set<ConfigEntry, ConfigEntry::key_less>::iterator i;
    i=data.find(ConfigEntry(key));
	if(i==data.end())
	{
		if(defaultAutoAdd) SetString(key,""); //SetString(key, def?def:"");
		return def;
	}
	i->used=true;
    // This should be OK, until this key gets removed
	const std::string &iVal = i->val;
	return iVal.c_str();
}

char *ConfigFile::GetStringDup(const char *key, const char *def){
    const char *c=GetString(key, def);
    if(c==NULL) return NULL;
    return strdup(c);
}

bool ConfigFile::SetString(const char *key, string val, const char *comment){
    set<ConfigEntry, ConfigEntry::key_less>::iterator i;
    bool ret=false;
    bool found;

    ConfigEntry e(key, val);
	if(comment && *comment) e.comment = comment;
	e.used=true;

    i=data.find(e);
    found=(i==data.end());
    if(!found){
        e.line=i->line;
        data.erase(e);
		sectionSizes.DecreaseSectionSize(e.section);
        ret=true;
    }
	if((found && (!alphaSort || timeSort)) || (!alphaSort && timeSort))
		e.line = linectr++;

    data.insert(e);
	sectionSizes.IncreaseSectionSize(e.section);
    return ret;
}

int32 ConfigFile::GetInt(const char *key, int32 def, bool *bad){
    if(bad) *bad=false;
	if(!Exists(key))
		return def;
    char *c;
    int32 i;
    string o=Get(key);
    i=strtol(o.c_str(), &c, 10);
    if(c!=NULL && *c!='\0'){
        i=def;
        if(bad) *bad=true;
    }
    return i;
}

bool ConfigFile::SetInt(const char *key, int32 val, const char *comment){
    char buf[20];
    snprintf(buf, sizeof(buf), "%d", (int)val);
    return SetString(key, buf, comment);
}

uint32 ConfigFile::GetUInt(const char *key, uint32 def, int base, bool *bad){
    if(bad) *bad=false;
	if(!Exists(key))
		return def;
    if(base!=8 && base!=10 && base!=16) base=0;
    char *c;
    uint32 i;
    string o=Get(key);
    i=strtol(o.c_str(), &c, base);
    if(c!=NULL && *c!='\0'){
        i=def;
        if(bad) *bad=true;
    }
    return i;
}

bool ConfigFile::SetUInt(const char *key, uint32 val, int base, const char *comment){
    char buf[20];
    switch(base){
      case 10:
      default:
        snprintf(buf, sizeof(buf), "%u", (unsigned int)val);
        break;
      case 8:
        snprintf(buf, sizeof(buf), "%#o", (unsigned int)val);
        break;
      case 16:
        snprintf(buf, sizeof(buf), "%#x", (unsigned int)val);
        break;
    }
    return SetString(key, buf, comment);
}

bool ConfigFile::GetBool(const char *key, bool def, bool *bad){
    if(bad) *bad=false;
    if(!Exists(key))
		return def;
    string o=Get(key);
    const char *c=o.c_str();
    if(!strcasecmp(c, "true") || !strcasecmp(c, "1") || !strcasecmp(c, "yes") || !strcasecmp(c, "on")) return true;
    if(!strcasecmp(c, "false") || !strcasecmp(c, "0") || !strcasecmp(c, "no") || !strcasecmp(c, "off")) return false;
    if(bad) *bad=true;
    return def;
}

bool ConfigFile::SetBool(const char *key, bool val, const char *true_val, const char *false_val, const char *comment){
    return SetString(key, val?true_val:false_val, comment);
}

const char* ConfigFile::GetComment(const char *key)
{
    set<ConfigEntry, ConfigEntry::key_less>::iterator i;
    i=data.find(ConfigEntry(key));
	if(i==data.end())
		return NULL;

    // This should be OK, until this key gets removed
	const std::string &iCom = i->comment;
	return iCom.c_str();
}

bool ConfigFile::DeleteKey(const char *key){
	ConfigEntry e = ConfigEntry(key);
	if(data.erase(e)) {
		sectionSizes.DecreaseSectionSize(e.section);
		return true;
	}
    return false;
}

/***********************************************/

bool ConfigFile::DeleteSection(const char *section){
    set<ConfigEntry, ConfigEntry::key_less>::iterator s, e;

    for(s=data.begin(); s!=data.end() && s->section!=section; s++) ;
    if(s==data.end()) return false;
    for(e=s; e!=data.end() && e->section==section; e++) ;
    data.erase(s, e);
	sectionSizes.DeleteSection(section);
    return true;
}

ConfigFile::secvec_t ConfigFile::GetSection(const char *section){
    secvec_t v;
    set<ConfigEntry, ConfigEntry::key_less>::iterator i;

    v.clear();
    for(i=data.begin(); i!=data.end(); i++){
        if(i->section!=section) continue;
        v.push_back(std::pair<string,string>(i->key, i->val));
    }
    return v;
}

int ConfigFile::GetSectionSize(const std::string section){
	return sectionSizes.GetSectionSize(section);
}

// Clears all key-value pairs that didn't receive a "Get" or "Exists" command
void ConfigFile::ClearUnused()
{
    set<ConfigEntry, ConfigEntry::key_less>::iterator i;
again:
    for(i=data.begin(); i!=data.end(); i++){
		if(!i->used){
			data.erase(i);
			goto again;
		}
	}
}

void ConfigFile::ClearLines()
{
    set<ConfigEntry, ConfigEntry::key_less>::iterator i;
    for(i=data.begin(); i!=data.end(); i++){
		*(const_cast<int*>(&i->line)) = -1;
    }
}

bool ConfigFile::ConfigEntry::section_then_key_less::operator()(const ConfigEntry &a, const ConfigEntry &b) {
	if(curConfigFile && a.section!=b.section){
		const int sva = curConfigFile->GetSectionSize(a.section);
		const int svb = curConfigFile->GetSectionSize(b.section);
		if(sva<svb) return true;
		if(sva>svb) return false;
		return a.section<b.section;
	}
	return a.key<b.key;
}


void ConfigFile::SetDefaultAutoAdd(bool autoAdd)
{
	defaultAutoAdd = autoAdd;
}
void ConfigFile::SetNiceAlignment(bool align)
{
	niceAlignment = align;
}
void ConfigFile::SetShowComments(bool show)
{
	showComments = show;
}
void ConfigFile::SetAlphaSort(bool sort)
{
	alphaSort = sort;
}
void ConfigFile::SetTimeSort(bool sort)
{
	timeSort = sort;
}