Another awk question

Hello,

I have a data file:

1,1,a,b
1,1,b,x
1,1,c,1
1,2,a,2
1,2,b,3
1,2,c,4
2,1,a,6
2,1,b,g
2,1,c,h
2,2,a,2
2,2,b,p
2,2,c,4

The first column is the key, second column is field ID, third is tag and forth is value.
I want to get it into this format

key {fieldid {tag value tag value...} fieldid {tag value ...}}
key {fieldid {tag value tag value...} fieldid {tag value ...}}

So in example above I get the following output:

1 {1 {a b b x  c 1} 2 {a 2 b 3 c 4}}
2 {1 {a 6 b g c h } 2 {a 2 b 2 c 4}}

Is this possible using awk? If so how?
chuntseAsked:
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chuntseAuthor Commented:
The key, fieldid, tag and values will be varying length
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ozoCommented:
how will they vary, and what would the output be in that case?
0
chuntseAuthor Commented:
An altered example:

1,1,a,b123
1,1,b1,x23
1,1,cxq,12211
1,21,a1,2
1,21,b21,3
1,21,ca1f,400

becomes

1 {1 {a b123 b1 x23  cxq 1} 21 {a1 2 b21 3 ca1f 400}}
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ozoCommented:
awk -F, '{if(  f1 != $1 ){  if( f ){ print( f "}}"); }  f = $1 " {" $2 " {" $3 " " $4; f2=$2} if( f2 != $2 ){ f=f "} "$2 " {";}  f1 = $1; f2 = $2; f = f " " $3 " " $4; } END{  print( f "}}") }'
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chuntseAuthor Commented:
Great thanks.

Some values contain spaces and I need to enclose in braces but if I can't work if out using your example then I'll post another question.
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