// Hyperbolic Rogue
// This file implements the multi-dimensional (aka crystal) geometries.
// Copyright (C) 2011-2018 Zeno Rogue, see 'hyper.cpp' for details

namespace hr {

namespace crystal {

bool add_bitruncation = false;
bool view_coordinates = false;

const int MAXDIM = 7;

typedef array<int, MAXDIM> coord;
static const coord c0 = {};

int tocode(int cname) { return (1 << (cname >> 1)); }

void resize2(vector<vector<int>>& v, int a, int b, int z) {
  v.clear();
  v.resize(a);
  for(auto& w: v) w.resize(b, z);
  }

const int FULLSTEP = 16;
const int HALFSTEP = 8;

struct crystal_structure {
  int dir;
  int dim;
  
  vector<vector<int>> cmap;
  vector<vector<int>> next;
  vector<vector<int>> prev;
  vector<vector<int>> order;
  
  void coord_to_next() {
    resize2(next, 1<<dim, 2*dim, -1);
    for(int a=0; a<(1<<dim); a++) 
      for(int b=0; b<dir; b++)
        next[a][cmap[a][b]] = cmap[a][(b+1)%dir];
    println(hlog, next);
    }
  
  void next_to_coord() {
    resize2(cmap, 1<<dim, dir, -1);
    for(int a=0; a<(1<<dim); a++) {
      int at = 0;
      for(int b=0; b<dir; b++) {
        cmap[a][b] = at;
        at = next[a][at];
        }
      }
    println(hlog, "coordinate map is:\n", cmap);
    }

  void next_to_prev() {
    resize2(prev, 1<<dim, 2*dim, -1);
    for(int a=0; a<(1<<dim); a++)
      for(int b=0; b<dir; b++) {
        if(next[a][b] != -1)
          prev[a][next[a][b]] = b;
        }
    }

  void coord_to_order() {
    println(hlog, dir, dim);
    resize2(order, 1<<dim, 2*dim, -1);
    for(int a=0; a<(1<<dim); a++) 
    for(int b=0; b<dir; b++)
      order[a][cmap[a][b]] = b;
    println(hlog, order);
    }
  
  int count_bugs() {
    int bugcount = 0;
      
    for(int a=0; a<(1<<dim); a++) 
    for(int b=0; b<2*dim; b++) {
      if(next[a][b] == -1) continue;
      int qa = a, qb = b;
      for(int i=0; i<4; i++) {
        if(i == 2 && (qb != (b^1))) bugcount++;
        qa ^= tocode(qb);
        qb ^= 1;
        qb = next[qa][qb];
        }
      if(a != qa || b != qb) bugcount++;
      }
    
    return bugcount;
    }
  
  void next_insert(int a, int at, int val) {
    int pd = next[a].size();

    next[a].resize(pd + 2);
    next[a][val] = next[a][at];
    next[a][at] = val;
    next[a][val^1] = next[a][at^1];
    next[a][at^1] = val^1;

    prev[a].resize(pd + 2);
    prev[a][val] = at;
    prev[a][next[a][val]] = val;
    prev[a][val^1] = at^1;
    prev[a][next[a][val^1]] = val^1;
    }

  void prev_insert(int a, int at, int val) {
    next_insert(a, prev[a][at], val);
    }
  
  int errors = 0;
  
  bool may_next_insert(int a, int at, int val) {
    if(isize(next[a]) != dir) {
      next_insert(a, at, val);
      return true;
      }
    else if(next[a][at] != val) errors++;
    return false;
    }
  
  bool may_prev_insert(int a, int at, int val) {
    if(isize(prev[a]) != dir) {
      prev_insert(a, at, val);
      return true;
      }
    else if(prev[a][at] != val) errors++;
    return false;
    }
  
  void add_dimension_to(crystal_structure& poor) {
    dir = poor.dir + 2;
    dim = poor.dim + 1;

    printf("Building dimension %d\n", dim);

    next.resize(1<<dim);
    prev.resize(1<<dim);
    int mask = (1<<poor.dim) - 1;
    
    int mm = tocode(poor.dir);

    for(int i=0; i<(1<<dim); i++) {
      if(i < mm)
        next[i] = poor.next[i&mask], prev[i] = poor.prev[i&mask];
      else
        next[i] = poor.prev[i&mask], prev[i] = poor.next[i&mask];
      }

    next_insert(0, 0, poor.dir);
    
    for(int s=2; s<1<<(dim-2); s+=2) {
      if(next[s][0] < 4)
        prev_insert(s, 0, poor.dir);
      else
        next_insert(s, 0, poor.dir);
      }
    // printf("next[%d][%d] = %d\n", 4, 2, next[4][2]);
    
    for(int s=0; s<8; s++) for(int a=0; a<(1<<dim); a++) if(isize(next[a]) > poor.dir) {
      int which = next[a][poor.dir];
      int a1 = a ^ tocode(which);
      
      may_next_insert(a1, which^1, poor.dir);
      may_next_insert(a ^ mm, which, poor.dir^1);
      which = prev[a][poor.dir];
      a1 = a ^ tocode(which);
      may_prev_insert(a1, which^1, poor.dir);
      }
      
    // println(hlog, next);
    
    if(errors) { printf("errors: %d\n", errors); exit(1);; }
    
    int unf = 0;
    for(int a=0; a<(1<<dim); a++) if(isize(next[a]) == poor.dir) {
      if(!unf) printf("unf: ");
      printf("%d ", a);
      unf ++;
      }
    
    if(unf) { printf("\n"); exit(2); }

    for(int a=0; a<(1<<dim); a++) for(int b=0; b<dir; b++)
      if(prev[a][next[a][b]] != b) {
        println(hlog, next[a], prev[a]);
        printf("next/prev %d\n", a);
        exit(3);
        }
      
    if(count_bugs()) {
      printf("bugs reported: %d\n", count_bugs());
      exit(4);
      }
    }
  
  void remove_half_dimension() {
    dir--;
    for(int i=0; i<(1<<dim); i++) {
      int take_what = dir;
      if(i >= (1<<(dim-1))) take_what = dir-1;
      next[i][prev[i][take_what]] = next[i][take_what],
      prev[i][next[i][take_what]] = prev[i][take_what],
      next[i].resize(dir),
      prev[i].resize(dir);
      }
    }

  void build() {
    dir = 4;
    dim = 2;
    next.resize(4, {2,3,1,0});
    next_to_prev();
    while(dir < S7) {
      crystal_structure csx = move(*this);
      add_dimension_to(csx);
      }
    if(dir > S7) remove_half_dimension();
      
    next_to_coord();
    
    coord_to_order();
    coord_to_next();
    if(count_bugs()) {
      printf("bugs found\n");
      }
    if(dir > MAX_EDGE || dim > MAXDIM) {
      printf("Dimension or directions exceeded -- I have generated it, but won't play");
      exit(0);
      }
    }
  
  };

struct lwalker {
  crystal_structure cs;
  int id;
  int spin;
  };

lwalker operator +(lwalker a, int v) { a.spin = gmod(a.spin + v, a.cs.dir); return a; }
lwalker operator +(lwalker a, wstep_t) {
  a.spin = a.cs.cmap[a.id][a.spin];
  a.id ^= tocode(a.spin);
  a.spin = a.cs.order[a.id][a.spin^1];
  return a;
  }

coord add(coord c, lwalker a, int val) {
  int code = a.cs.cmap[a.id][a.spin];
  c[code>>1] += (code&1) ? val : -val;
  return c;
  }
  
map<heptagon*, coord> hcoords;
map<coord, heptagon*> heptagon_at;

crystal_structure cs;

coord add(coord c, int cname, int val) {
  int dim = (cname>>1);
  c[dim] = (c[dim] + (cname&1?val:-val));
  return c;
  }

lwalker makewalker(crystal_structure& cs, coord c, int d) {
  lwalker a;
  a.cs = cs;
  a.id = 0;
  for(int i=0; i<cs.dim; i++) if(c[i] & FULLSTEP) a.id += (1<<i);
  a.spin = d;
  return a;
  }

void crystalstep(heptagon *h, int d);

heptagon *get_heptagon_at(coord c, int deg) {
  if(heptagon_at.count(c)) return heptagon_at[c];
  heptagon*& h = heptagon_at[c];
  h = tailored_alloc<heptagon> (deg);
  h->alt = NULL;
  h->cdata = NULL;
  h->c7 = newCell(deg, h);
  h->distance = 0;
  for(int i=0; i<cs.dim; i++) h->distance += abs(c[i]);
  hcoords[h] = c;
  // for(int i=0; i<6; i++) crystalstep(h, i);
  return h;
  }

coord get_coord(cell *c) {
  if(c->master->c7 != c) {
    coord res = c0;
    for(int i=0; i<c->type; i+=2) {
      coord co = hcoords[c->move(i)->master];
      for(int d=0; d<cs.dim; d++) res[d] += co[d];
      }
    for(int d=0; d<cs.dim; d++) res[d] = (2 * res[d] + c->type/2) / c->type;
    return res;
    }
  else
    return hcoords[c->master];
  }

struct hrmap_crystal : hrmap {
  heptagon *getOrigin() { return get_heptagon_at(c0, S7); }

  hrmap_crystal() {
    cs.build();
    }

  void verify() { }
  };
 
hrmap *new_map() {
  return new hrmap_crystal;
  }

bool is_bi(coord co) {
  for(int i=0; i<cs.dim; i++) if(co[i] & HALFSTEP) return true;
  return false;
  }

void create_step(heptagon *h, int d) {
  if(geometry != gCrystal) return;
  if(!hcoords.count(h)) {
    printf("not found\n");
    return;
    }
  auto co = hcoords[h];
  
  if(is_bi(co)) {
    heptspin hs(h, d);
    (hs + 1 + wstep + 1).cpeek();
    return;
    }

  auto lw = makewalker(cs, co, d);

  if(!add_bitruncation) {
    auto c1 = add(co, lw, FULLSTEP);
    auto lw1 = lw+wstep;
    
    h->c.connect(d, heptspin(get_heptagon_at(c1, S7), lw1.spin));
    }
  else {
    auto coc = add(add(co, lw, HALFSTEP), lw+1, HALFSTEP);
    auto hc = get_heptagon_at(coc, HALFSTEP);
    for(int a=0; a<8; a+=2) {
      hc->c.connect(a, heptspin(h, lw.spin));
      if(h->modmove(lw.spin-1)) {
        hc->c.connect(a+1, heptspin(h, lw.spin) - 1 + wstep - 1);
        }
      co = add(co, lw, FULLSTEP);
      lw = lw + wstep + (-1);
      h = get_heptagon_at(co, S7);
      }
    }
  }

array<array<int,2>, MAX_EDGE> distlimit_table = {{
  {SEE_ALL,SEE_ALL}, {SEE_ALL,SEE_ALL}, {SEE_ALL,SEE_ALL}, {SEE_ALL,SEE_ALL}, {15, 10}, 
  {6, 4}, {5, 3}, {4, 3}, {4, 3}, {3, 2}, {3, 2}, {3, 2}, {3, 2}, {3, 2}
  }};

int readArgs() {
  using namespace arg;
           
  if(0) ;
  else if(argis("-crystal")) {
    stop_game();
    geometry = gCrystal; variation = eVariation::pure;
    shift(); int N = argi();
    ginf[gCrystal].sides = N;
    ginf[gCrystal].vertex = 4;
    if(N < MAX_EDGE)
      ginf[gCrystal].distlimit = distlimit_table[N];
    add_bitruncation = false;
    }
  else if(argis("-crystalb")) {
    stop_game();
    geometry = gCrystal; variation = eVariation::bitruncated;
    ginf[gCrystal].sides = 8;
    ginf[gCrystal].vertex = 3;
    ginf[gCrystal].distlimit = {7, 5};
    add_bitruncation = true;
    }
  else if(argis("-cview")) {
    view_coordinates = true;
    }
  else return 1;
  return 0;
  }

color_t colorize(cell *c) {
  coord co = get_coord(c);
  color_t res;
  res = 0;
  for(int i=0; i<3; i++)
    res |= ((i == 2 && S7 == 5) ? (co[i] ? 255 : 0) : (128 + co[i] * 3)) << (8*i);
  return res;
  }

bool crystal_cell(cell *c, transmatrix V) {

  if(geometry != gCrystal) return false;

  if(view_coordinates && cheater) for(int i=0; i<S7; i++) {
    
    if(c->master->c7 == c) {    
      transmatrix V1 = cellrelmatrix(c, i);
      ld dist = hdist0(V1 * C0);
      ld alpha = -atan2(V1 * C0);
      transmatrix T = V * spin(alpha) * xpush(dist*.3);

      auto co = hcoords[c->master];
      int our_id = 0;
      for(int a=0; a<MAXDIM; a++) if(co[a] & FULLSTEP) our_id += (1<<a);
      int cx = cs.cmap[our_id][i];
      
      int coordcolors[MAXDIM] = {0x4040D0, 0x40D040, 0xD04040, 0xFFD500, 0xF000F0, 0x00F0F0, 0xF0F0F0 };
    
      queuestr(T, 0.3, its(co[cx>>1] / (add_bitruncation ? HALFSTEP : FULLSTEP)), coordcolors[cx>>1], 1);
      }

    if(PURE) {
      cellwalker cw(c, i);
      cellwalker cw2 = cw;
      for(int i=0; i<(add_bitruncation?3:4); i++) cw2 = cw2 + wstep + 1;
      if(cw2 != cw) { printf("crystal valence error\n"); cw.at->item = itGold; }
      }
    }
  return false;
  }

int hypot2(coord co1, coord co2) {
  int result = 0;
  for(int a=0; a<cs.dim; a++) result += (co1[a] - co2[a]) * (co1[a] - co2[a]);
  return result;
  }
  
int distance(cell *c1, cell *c2) {
  if(true || (PURE && !add_bitruncation)) {
    coord co1 = hcoords[c1->master];
    coord co2 = hcoords[c2->master];
    int result = 0;
    for(int a=0; a<cs.dim; a++) result += abs(co1[a] - co2[a]);
    return result / FULLSTEP;
    }
  }

auto crystalhook = addHook(hooks_args, 100, readArgs)
  + addHook(hooks_drawcell, 100, crystal_cell);

}

}