var K = require('../krasota'),
    KrasotaJSIdentity = K.KrasotaJSIdentity;

ometa KrasotaJS <: KrasotaJSIdentity {

    stmtInd = [#stmt t:s t t t] -> s,
    stmtOutd = [#stmt t t t t:s] -> s,

    joinVarStmtItemInd false:s1 :s2 = t:s,
    joinVarStmtItemInd :s1 :s2 = t:s -> [#spacesAndComments,
        s1[1].concat(s2[1], [[#spaces, '   ']], s[1])],

    joinVarStmtItem :ss1 :ss2 = [#varItemAsgn
            joinVarStmtItem(ss1, ss2):n
            t:s1 t:s2 t:e t:s3] -> [#varItemAsgn, n, s1, s2, e, s3]
        | [#varItemName
            joinVarStmtItemInd(ss1, ss2):s1
            t:n t:s2] -> [#varItemName, s1, n, s2],

    joinVarStmt :prevOutd = [#stmt t:s1 [#varStmt [joinVarStmtItem(prevOutd, s1):v1 t*:vs]] t:se t:s2] -> [#stmt,
        s1,
        [#varStmt, [v1].concat(vs)],
        se, s2],

    joinVarStmts :p = joinVarStmt(p):v1 stmtOutd(v1):v1o joinVarStmts(v1o):vs -> [v1].concat(vs)
            | joinVarStmt(p):v -> [v],

    t = joinVarStmts(false):vs ?(vs.length > 1) -> {
            var lastVar = vs[vs.length - 1]; // use stmtEnd and stmtOutd from lastVar
            lastVar[1] = vs[0][1]; // use stmtInd from firstVar
            lastVar[2] = [#varStmt, vs.reduce(function(r, v) { r.push.apply(r, v[2][1]); return r }, [])];
            lastVar
        }
        | ^t

}