#include <ot/timer/timer.hpp>

namespace ot {

// Function: dump_graph
void Timer::dump_graph(std::ostream& os) const {
  std::shared_lock lock(_mutex);
  _dump_graph(os);
}

// Function: dump_power
void Timer::dump_power(std::ostream& os) const {
  std::shared_lock lock(_mutex);
  _dump_power(os);
}

// Function: _dump_graph
void Timer::_dump_graph(std::ostream& os) const {

  os << "digraph TimingGraph {\n";
  for(const auto& pin : _pins) {
    os << "  \"" << pin.second._name << "\";\n";
  }

  for(const auto& arc : _arcs) {
    os << "  \"" << arc._from._name << "\" -> \"" << arc._to._name << "\";\n";
  }
  os << "}\n";
}

void Timer::_dump_power(std::ostream& os) const {

  float total_ipower = 0.0;
  float total_cap    = 0.0;

  auto plen = _max_pin_name_size();

  os << std::setfill('-') << std::setw(49 + plen) << '\n'
    << std::setfill(' ') << std::setw(10) << "switch" << "  "
    << std::setfill(' ') << std::setw(10) << "internal" << "  "
    << std::setw(2 + plen)  << "Pin"   << '\n';

  os << std::setfill(' ') << std::fixed << std::setprecision(3);

  for(const auto& kvp : _pins) {

    const auto& pin = kvp.second;
    auto [pin_total_cap, pin_total_ipower] = pin.power();

    os << std::setw(10) << pin_total_cap << "  ";
    os << std::setw(10) << pin_total_ipower<< "  ";

    total_ipower += pin_total_ipower;

    os << std::setw(plen) << pin._name << '\n';

    total_cap    += pin_total_cap;
  }

  os << std::setw(10) << total_cap << "  ";
  os << std::setw(10) << total_ipower << "  ";
  os << std::setw(plen) << "total" << '\n';
}

// Function: dump_taskflow
void Timer::dump_taskflow(std::ostream& os) const {
  std::shared_lock lock(_mutex);
  _dump_taskflow(os);
}

// Function: _dump_taskflow
void Timer::_dump_taskflow(std::ostream& os) const {
  _taskflow.dump(os);
}

// Function: dump_timer
void Timer::dump_timer(std::ostream& os) const {
  std::shared_lock lock(_mutex);
  _dump_timer(os);
}

// Function: _dump_timer
void Timer::_dump_timer(std::ostream& os) const {

  os << "OpenTimer " << OT_VERSION << '\n';

  // units
  if(_time_unit) {
    os << "Time unit        : " << *_time_unit << '\n';
  }

  if(_capacitance_unit) {
    os << "Capacitance unit : " << *_capacitance_unit << '\n';
  }

  if(_voltage_unit) {
    os << "Voltage unit     : " << *_voltage_unit << '\n';
  }

  if(_resistance_unit) {
    os << "Resistance unit  : " << *_resistance_unit << '\n';
  }

  if(_current_unit) {
    os << "Current unit     : " << *_current_unit << '\n';
  }

  if(_power_unit) {
    os << "Power unit       : "  << *_power_unit << '\n';
  }

  {
    auto v = cell_voltage();
    if (v) {
      os << "Voltage          : "  << *v << '\n';
    }
  }

  size_t num_cells = 0;


  FOR_EACH_EL_IF(el, _celllib[el]) {
    num_cells = std::max(num_cells, _celllib[el]->cells.size());
  }

  // design statistics
  os << "# Pins           : " << _pins.size()  << '\n'
      << "# POs            : " << _pos.size()   << '\n'
      << "# PIs            : " << _pis.size()   << '\n'
      << "# Gates          : " << _gates.size() << '\n'
      << "# Nets           : " << _nets.size()  << '\n'
      << "# Arcs           : " << _arcs.size()  << '\n'
      << "# SCCs           : " << _sccs.size()  << '\n'
      << "# Tests          : " << _tests.size() << '\n'
      << "# Cells          : " << num_cells     << '\n';
}

// Function: dump_net_load
void Timer::dump_net_load(std::ostream& os) const {
  std::shared_lock lock(_mutex);
  _dump_net_load(os);
}

// Function: _dump_net_load
void Timer::_dump_net_load(std::ostream& os) const {

  os << "Net Load [nets:" << _nets.size() << "]\n";

  if(!_nets.empty())  {

    // find the maximum net name
    auto nlen = _max_net_name_size();

    os << std::setfill('-') << std::setw(49 + nlen) << '\n'
        << std::setfill(' ') << std::setw(10) << "E/R"
                             << std::setw(12) << "E/F"
                             << std::setw(12) << "L/R"
                             << std::setw(12) << "L/F"
                             << std::setw(2 + nlen)  << "Net"   << '\n'
        << std::setfill('-') << std::setw(49 + nlen) << '\n';

    os << std::setfill(' ') << std::fixed << std::setprecision(3);
    for(const auto& kvp : _nets) {

      const auto& net = kvp.second;

      FOR_EACH_EL_RF(el, rf) {
        os << std::setw(10) << net._load(el, rf) << "  ";
      }

      os << std::setw(nlen) << net._name << '\n';
    }
    os << std::setfill('-') << std::setw(49 + nlen) << '\n';
  }
}

// Function: dump_pin_cap
void Timer::dump_pin_cap(std::ostream& os) const {
  std::shared_lock lock(_mutex);
  _dump_pin_cap(os);
}

// Function: _dump_pin_cap
void Timer::_dump_pin_cap(std::ostream& os) const {

  os << "Pin Capacitance [pins:" << _pins.size()
      << "]\n";

  if(!_pins.empty())  {

    // find the maximum pin name
    auto plen = _max_pin_name_size();

    os << std::setfill('-') << std::setw(49 + plen) << '\n'
        << std::setfill(' ') << std::setw(10) << "E/R"
                             << std::setw(12) << "E/F"
                             << std::setw(12) << "L/R"
                             << std::setw(12) << "L/F"
                             << std::setw(2 + plen)  << "Pin"   << '\n'
        << std::setfill('-') << std::setw(49 + plen) << '\n';

    os << std::setfill(' ') << std::fixed << std::setprecision(3);
    for(const auto& kvp : _pins) {

      const auto& pin = kvp.second;

      FOR_EACH_EL_RF(el, rf) {
        os << std::setw(10) << pin.cap(el, rf) << "  ";
      }

      os << std::setw(plen) << pin._name << '\n';
    }
    os << std::setfill('-') << std::setw(49 + plen) << '\n';
  }
}

// Function: dump_slew
void Timer::dump_slew(std::ostream& os) const {
  std::shared_lock lock(_mutex);
  _dump_slew(os);
}

// Function: _dump_slew
void Timer::_dump_slew(std::ostream& os) const {

  os << "Slew [pins:" << _pins.size() << "]\n";

  if(!_pins.empty())  {

    // find the maximum pin name
    auto plen = _max_pin_name_size();

    os << std::setfill('-') << std::setw(49 + plen) << '\n'
        << std::setfill(' ') << std::setw(10) << "E/R"
                             << std::setw(12) << "E/F"
                             << std::setw(12) << "L/R"
                             << std::setw(12) << "L/F"
                             << std::setw(2 + plen)  << "Pin"   << '\n'
        << std::setfill('-') << std::setw(49 + plen) << '\n';

    os << std::setfill(' ') << std::fixed << std::setprecision(3);
    for(const auto& kvp : _pins) {

      const auto& pin = kvp.second;

      FOR_EACH_EL_RF(el, rf) {
        os << std::setw(10);
        if(auto slew = pin.slew(el, rf); slew) os << *slew;
        else os << "n/a";
        os << "  ";
      }

      os << std::setw(plen) << pin._name << '\n';
    }
    os << std::setfill('-') << std::setw(49 + plen) << '\n';
  }
}

// Function: dump_slack
void Timer::dump_slack(std::ostream& os) const {
  std::shared_lock lock(_mutex);
  _dump_slack(os);
}

// Function: _dump_slack
void Timer::_dump_slack(std::ostream& os) const {

  os << "Slack [pins:" << _pins.size() << "]\n";

  if(!_pins.empty())  {

    // find the maximum pin name
    auto plen = _max_pin_name_size();

    os << std::setfill('-') << std::setw(49 + plen) << '\n'
        << std::setfill(' ') << std::setw(10) << "E/R"
                             << std::setw(12) << "E/F"
                             << std::setw(12) << "L/R"
                             << std::setw(12) << "L/F"
                             << std::setw(2 + plen)  << "Pin"   << '\n'
        << std::setfill('-') << std::setw(49 + plen) << '\n';

    os << std::setfill(' ') << std::fixed << std::setprecision(3);
    for(const auto& kvp : _pins) {

      const auto& pin = kvp.second;

      FOR_EACH_EL_RF(el, rf) {
        os << std::setw(10);
        if(auto slack = pin.slack(el, rf); slack) os << *slack;
        else os << "n/a";
        os << "  ";
      }

      os << std::setw(plen) << pin._name << '\n';
    }
    os << std::setfill('-') << std::setw(49 + plen) << '\n';
  }
}

// Function: dump_at
void Timer::dump_at(std::ostream& os) const {
  std::shared_lock lock(_mutex);
  _dump_at(os);
}

// Function: _dump_at
void Timer::_dump_at(std::ostream& os) const {

  os << "Arrival time [pins:" << _pins.size() << "]\n";

  if(!_pins.empty())  {

    // find the maximum pin name
    auto plen = _max_pin_name_size();

    os << std::setfill('-') << std::setw(49 + plen) << '\n'
        << std::setfill(' ') << std::setw(10) << "E/R"
                             << std::setw(12) << "E/F"
                             << std::setw(12) << "L/R"
                             << std::setw(12) << "L/F"
                             << std::setw(2 + plen)  << "Pin"   << '\n'
        << std::setfill('-') << std::setw(49 + plen) << '\n';

    os << std::setfill(' ') << std::fixed << std::setprecision(3);
    for(const auto& kvp : _pins) {

      const auto& pin = kvp.second;

      FOR_EACH_EL_RF(el, rf) {
        os << std::setw(10);
        if(auto at = pin.at(el, rf); at) os << *at;
        else os << "n/a";
        os << "  ";
      }

      os << std::setw(plen) << pin._name << '\n';

#if 0
      auto sr = pin.slew(MAX, RISE);
      auto sf = pin.slew(MAX, FALL);
      float slew_max = 0;
      if (sr)
        slew_max = *sr;
      if (sf && *sf>slew_max) {
        slew_max = *sf;
      }
      if (slew_max>0) {
        os << std::setw(plen) << slew_max << " " << pin._name << '\n';
      }
#endif
    }
    os << std::setfill('-') << std::setw(49 + plen) << '\n';
  }
}

// Function: dump_rat
void Timer::dump_rat(std::ostream& os) const {
  std::shared_lock lock(_mutex);
  _dump_rat(os);
}

// Function: _dump_rat
void Timer::_dump_rat(std::ostream& os) const {

  os << "Required arrival time [pins:" << _pins.size()
      << "]\n";

  if(!_pins.empty())  {

    // find the maximum pin name
    auto plen = _max_pin_name_size();

    os << std::setfill('-') << std::setw(49 + plen) << '\n'
        << std::setfill(' ') << std::setw(10) << "E/R"
                             << std::setw(12) << "E/F"
                             << std::setw(12) << "L/R"
                             << std::setw(12) << "L/F"
                             << std::setw(2 + plen)  << "Pin"   << '\n'
        << std::setfill('-') << std::setw(49 + plen) << '\n';

    os << std::setfill(' ') << std::fixed << std::setprecision(3);
    for(const auto& kvp : _pins) {

      const auto& pin = kvp.second;

      FOR_EACH_EL_RF(el, rf) {
        os << std::setw(10);
        if(auto rat = pin.rat(el, rf); rat) os << *rat;
        else os << "n/a";
        os << "  ";
      }

      os << std::setw(plen) << pin._name << '\n';
    }
    os << std::setfill('-') << std::setw(49 + plen) << '\n';
  }
}

// Function: dump_cell
void Timer::dump_cell(std::ostream& os, const std::string& name, Split el) const {
  std::shared_lock lock(_mutex);
  _dump_cell(os, name, el);
}

// Function: _dump_cell
void Timer::_dump_cell(std::ostream& os, const std::string& name, Split el) const {
  if(_celllib[el]) {
    if(auto ptr = _celllib[el]->cell(name); ptr) {
      os << *ptr;
    }
    else {
      os << "cell not found\n";
    }
  }
  else {
    os << "celllib not found\n";
  }
}

// Function: dump_celllib
void Timer::dump_celllib(std::ostream& os, Split el) const {
  std::shared_lock lock(_mutex);
  _dump_celllib(os, el);
}

// Function: _dump_celllib
void Timer::_dump_celllib(std::ostream& os, Split el) const {
  if(_celllib[el]) {
    os << *_celllib[el];
  }
  else {
    os << "celllib not found\n";
  }
}

// Function: dump_verilog
void Timer::dump_verilog(std::ostream& os, const std::string& name) const {
  std::shared_lock lock(_mutex);
  _dump_verilog(os, name);
}

// Function: _dump_verilog
void Timer::_dump_verilog(std::ostream& os, const std::string& name) const {

  size_t idx = 0;
  size_t num_ports = _pis.size() + _pos.size();

  // Module header
  os << "module " << (name.empty() ? "OpenTimer"s : name) << " (\n";
  // PI
  for(const auto& pi : _pis) {
    if(++idx < num_ports) {
      os << pi.first << ",\n";
    }
    else {
      os << pi.first << '\n';
    }
  }
  // PO
  for(const auto& po : _pos) {
    if(++idx < num_ports) {
      os << po.first << ",\n";
    }
    else {
      os << po.first << '\n';
    }
  }
  os << ");\n";

  // Start PIs
  os << "\n// Start PIs\n";
  for(const auto& pi : _pis) {
    os << "input " << pi.first << ";\n";
  }

  // Start POs
  os << "\n// Start POs\n";
  for(const auto& po : _pos) {
    os << "output " << po.first << ";\n";
  }

  // Start Wires
  os << "\n// Start wires\n";
  for(const auto& net : _nets) {
    os << "wire " << net.first << ";\n";
  }

  // Start cells
  os << "\n// Start cells\n";
  for(const auto& gate : _gates) {
    os << gate.second._cell[MIN]->name << ' ' << gate.first << " (";

    for(const auto& pin : gate.second._pins) {
      if(pin->_net) {
        os << " ." << pin->cellpin(MIN)->name << '(' << pin->_net->_name << ')';
      }
    }

    os << " );\n";
  }

  // endmodule
  os << "\nendmodule\n";
}

// Procedure: dump_rctree
void Timer::dump_rctree(std::ostream& os) const {
  std::shared_lock lock(_mutex);
  _dump_rctree(os);
}

// Procedure: _dump_rctree
void Timer::_dump_rctree(std::ostream& os) const {

  os << "Total Nets: " << _nets.size() << '\n';

  for(const auto& [net_name, net] : _nets) {

    os << net_name << ' ';

    auto rct = std::get_if<Rct>(&net._rct);

    if(rct == nullptr) {
      os << "0 0 nil\n";
      continue;
    }

    os << rct->_nodes.size() << ' '
       << rct->_edges.size() << ' '
       << rct->_root->_name  << '\n';

    for(const auto& [node_name, node] : rct->_nodes) {
      os << node_name << ' ' << node._ncap[MIN][RISE] << '\n';

      //os << "ures:";
      //FOR_EACH_EL_RF(el, rf) {
      //  os << ' ' << node._ures[el][rf];
      //}
      //os << '\n';
      //
      //os << "load:";
      //FOR_EACH_EL_RF(el, rf) {
      //  os << ' ' << node._load[el][rf];
      //}
      //os << '\n';
      //
      //os << "beta:";
      //FOR_EACH_EL_RF(el, rf) {
      //  os << ' ' << node._beta[el][rf];
      //}
      //os << '\n';
      //
      //os << "delay:";
      //FOR_EACH_EL_RF(el, rf) {
      //  os << ' ' << node._delay[el][rf];
      //}
      //os << '\n';
      //
      //os << "ldelay:";
      //FOR_EACH_EL_RF(el, rf) {
      //  os << ' ' << node._ldelay[el][rf];
      //}
      //os << '\n';

      //os << "impulse:";
      //FOR_EACH_EL_RF(el, rf) {
      //  os << ' ' << node._impulse[el][rf];
      //}
      //os << '\n';
    }

    for(const auto& edge : rct->_edges) {
      os << edge._from._name << ' ' << edge._to._name << ' ' << edge._res << '\n';
    }
  }

}

// Function: dump_spef
void Timer::dump_spef(std::ostream& os) const {
  std::shared_lock lock(_mutex);
  _dump_spef(os);
}

// Function: _dump_spef
void Timer::_dump_spef(std::ostream& os) const {

  // Header
  //  *SPEF "IEEE 1481-1998"
  //  *DESIGN "c17"
  //  *DATE "Tue Nov 25 16:54:37 2014"
  //  *VENDOR "TAU 2015 Contest"
  //  *PROGRAM "Benchmark Parasitic Generator"
  //  *VERSION "0.0"
  //  *DESIGN_FLOW "NETLIST_TYPE_VERILOG"
  //  *DIVIDER /
  //  *DELIMITER :
  //  *BUS_DELIMITER [ ]
  //  *T_UNIT 1 PS
  //  *C_UNIT 1 FF
  //  *R_UNIT 1 KOHM
  //  *L_UNIT 1 UH
  os << "*SPEF \"IEEE 1481-1998\"\n"
     << "*DESIGN \"OpenTimer\"\n"
     << "*DATE \"2019\"\n"
     << "*VENDOR \"OpenTimer\"\n"
     << "*PROGRAM \"OpenTimer\"\n"
     << "*VERSION \"0\"\n"
     << "*DESIGN_FLOW \"NETLIST_TYPE_VERILOG\"\n"
     << "*DIVIDER /\n"
     << "*DELIMITER :\n"
     << "*BUS_DELIMITER [ ]\n";

  if(_time_unit) {
    os << "*T_UNIT " << (*_time_unit).value() * 1e12f << " PS\n";
  }
  else {
    os << "*T_UNIT\n";
  }

  if(_capacitance_unit) {
    os << "*C_UNIT " << (*_capacitance_unit).value() * 1e15f << " FF\n";
  }
  else {
    os << "*C_UNIT\n";
  }

  if(_resistance_unit) {
    os << "*R_UNIT " << (*_resistance_unit).value() * 1e-3f << " KOHM\n";
  }
  else {
    os << "*R_UNIT\n";
  }

  os << "*L_UNIT 1 UH\n";

  // RC network
  for(const auto& [name, net] : _nets) {

    if(auto rct = net.rct(); rct == nullptr) {
      continue;
    }
    else {
      os << "\n*D_NET " << name << ' ' << rct->total_ncap() << '\n';

      // *CONN section
      os << "*CONN\n";
      for(const auto& pin : net._pins) {
        if(pin->primary_output() || pin->primary_input()) {
          os << "*P ";
        }
        else {
          os << "*I ";
        }
        os << pin->_name << ' ';

        if(pin->is_input()) {
          os << "I\n";
        }
        else {
          os << "O\n";
        }
      }

      size_t idx {0};

      // *CAP section
      os << "*CAP\n";
      for(const auto& node : rct->_nodes) {
        os << ++idx << ' ' << node.first << ' ' << node.second._ncap[MIN][RISE] << '\n';
      }

      // *RES section
      idx = 0;
      os << "*RES\n";
      for(const auto& edge : rct->_edges) {
        ++idx;
        if(idx & 1) {
          os << idx << ' '
             << edge._from._name << ' '
             << edge._to._name << ' '
             << edge._res << '\n';
        }
      }

      os << "*END\n";
    }
  }
}

// Function: dump_fcpc26
void Timer::dump_fcpc26(std::ostream& ckt, size_t num_phases) const {
  


  // gate and its pins
  ckt << "num_gates: " << _gates.size() << '\n';
  for(const auto& [name, gate] : _gates) {
    ckt << name << ' ' << gate._cell[ot::MIN]->name << ' ' << gate._pins.size() << '\n';
    for(const auto pin : gate._pins) {
      ckt << pin->_name << ' '; 
    }
    ckt << '\n';
  }

  // cells
  std::vector<int> phases(num_phases);
  
  // Fill the vector with 0 to N-1
  for(int i = 0; i < num_phases; ++i) {
    phases[i] = i;
  }

  // Random number generator
  std::random_device rd;   // seed
  std::mt19937 gen(rd());    // Mersenne Twister engine

  const auto& celllib = _celllib[MIN] ? *_celllib[MIN] : *_celllib[MAX];
  ckt << "num_cells/_phases: " << celllib.cells.size() << ' ' << num_phases << '\n';
  for(const auto& [name, cell] : celllib.cells) {
    ckt << name;
  
    // Shuffle the phase vector - trying to mimic the behavior of transformation matrix
    std::shuffle(phases.begin(), phases.end(), gen);
    for(auto p : phases) {
      ckt << ' ' << p;
    }
    ckt << '\n';
  }

  // pins
  std::uniform_real_distribution<> dis(0.0, 50); 
  ckt << "num_pins " << _pins.size() << '\n';
  for(const auto& [name, pin] : _pins) {
    ckt << name << ' ' << pin.num_fanins();
    // zero-fanin inputs need to be filled with arbitrary value
    if(pin.num_fanins() == 0) {
      for(size_t i=0; i<num_phases; ++i) {
        ckt << ' ' << dis(gen);
      }
    }
    ckt << '\n';
  }
  
  // arcs
  ckt << "num_edges: " << _arcs.size() << '\n';
  for(const auto& arc : _arcs) {

    // find the maximum delay
    float delay = 0.0f;
    FOR_EACH_EL_RF_RF(el, rf1, rf2) {
      if(arc._delay[el][rf1][rf2]) {
        delay = std::max(delay, *arc._delay[el][rf1][rf2]);
      }
    }
    
    ckt << arc._from._name << ' ' << arc._to._name << ' '
        << delay << '\n';
  }

}

};  // end of namespace ot. -----------------------------------------------------------------------