// TODO: clean this up
\d u
\l utils.k
/ :`i$"A"; // 65
/ :`i$"Z"; // 90
/ :`i$"0"; // 48
/ :`i$"9"; // 57
/ :`i$":"; // 58
/ :`i$"$"; // 36

\d pat
testAtZ: { i:`i$x; $[(i>64) & (i<91);1;0] };
test0t9: { i:`i$x; $[(i>47) & (i<58);1;0] };
testcol: { i:`i$x; $[i=58;1;0] };
testend: { i:`i$x; $[i=36;1;0] };

s0: ((testAtZ; 1);(test0t9; 2));
s1: ((test0t9; 2);(testcol; 3));
s2: ((testend; 7); (testcol; 3));
s3: ((test0t9; 5);(testAtZ; 5));
s4: ((testAtZ; 5); (test0t9; 5));
s5: (,(test0t9; 5));

// 7 is done
states:: (s0;s1;s2;s3;s4;s5);
i: 1;

runS: {[c;s]
 :{
  :$[x[0][y];x[1];0]
 }[;c]'states[s]
};

// blk 1 stuff ===============================
blk1: {[a;c]
 / u.ppr "blk1";
 activeidx: 0;
 active: (0;a[3]+1);
 s: 0;

 r: runS[c;s];
 r: *($[(+/r)>0;r^0;0]);

 / u.ppr (c;r;a[2]);

 a0: $[s>4;s;r];
 :((,active);activeidx;r;a[3])
};

// blk 2 stuff ===============================
e:{[a;c;r]
 / u.ppr ("edge";r;a;c);
 // add indices
 indices: a[0],(,(a[3];a[3]));
 a[2]: r;
 a[1] +: 1;

 :(indices; a[1]; a[2]; a[3])
};

ne:{[a;c;r]
 / u.ppr "no edge";

 ai: a[1];
 a[0;ai;0]: $[a[2]>0;a[0;ai;0];a[3]];
 a[0;ai;1]: a[3]+1;

 a[2]: r;

 :a
};

blk2: {[a;c]
 / u.ppr ("blk2"; a);

 s: a[2];
 r: runS[c;s];
 r: *($[(+/r)>0;r^0;0]);

 / u.ppr (c;r;a[2]);

 edge: (s=((#states) - 1))&(r=0);
 a[3] +: 1;
 :$[edge;e[a;c;r];ne[a;c;r]]
};

run: {[str]
 / u.ppr ("finding pattern in: ", str);
 // ((0),-1,0) -> 0: list of start/end indices, 1: active index, 2: state the machine stopped on, 3: idx
 o:((0),-1,0,0) {[a;c]
  // if activeidx = -1 => blk1
  // else blk2
  / u.ppr "          ";
  :$[a[1]=-1;blk1[a;c];blk2[a;c]]
 }/str;

 :o
};

//          012345678901
/ u.ppr (run[" C1:C1-A1:A1"])
\d .