module Registry.Utils.PostgreSQL where 

import Registry.Grammar
import Registry.Types

escape :: String -> String
escape = concatMap fixChar
    where
      fixChar '\'' = "\'\'"
      fixChar c = [c]

maybeToPostgreSQL Nothing = "NULL"
maybeToPostgreSQL (Just s) = "'" ++ (escape s) ++ "'"

onedescrToPostgreSQL "language" i s = "INSERT INTO Descriptions (description) " ++
                         "    VALUES ('" ++ (escape s) ++ "');\n" ++ 
                         "INSERT INTO Descriptions_languages (description, lang) " ++ 
                         "   SELECT currval('Descriptions_id_seq'), '" ++ i ++ "';\n"
onedescrToPostgreSQL "script" i s = "INSERT INTO Descriptions (description) " ++
                         "    VALUES ('" ++ (escape s) ++ "');\n" ++ 
                         "INSERT INTO Descriptions_scripts (description, script) " ++ 
                         "   SELECT currval('Descriptions_id_seq'), '" ++ i ++ "';\n"
onedescrToPostgreSQL "region" i s = "INSERT INTO Descriptions (description) " ++
                         "    VALUES ('" ++ (escape s) ++ "');\n" ++ 
                         "INSERT INTO Descriptions_regions (description, region) " ++ 
                         "   SELECT currval('Descriptions_id_seq'), '" ++ i ++ "';\n"
onedescrToPostgreSQL "variant" i s = "INSERT INTO Descriptions (description) " ++
                         "    VALUES ('" ++ (escape s) ++ "');\n" ++ 
                         "INSERT INTO Descriptions_variants (description, variant) " ++ 
                         "   SELECT currval('Descriptions_id_seq'), '" ++ i ++ "';\n"
descrToPostgreSQL recordtype a i = concat (map (onedescrToPostgreSQL recordtype i) a)

toPostgreSQL (Lang l) = "INSERT INTO Languages (code, suppressscript, " ++
                            "preferredvalue, deprecated, comments, added) " ++
                          "VALUES (" ++
                            "'" ++ (lang'subtag l) ++ "', " ++
                            (maybeToPostgreSQL (lang'script l)) ++ ", " ++
                            (maybeToPostgreSQL (lang'preferredValue l)) ++ ", " ++
                            (maybeToPostgreSQL (lang'deprecated l)) ++ ", " ++ 
                            (maybeToPostgreSQL (lang'comment l)) ++ ", " ++ 
                            "'" ++ (lang'added l) ++ "');\n" ++
                         (descrToPostgreSQL "language" (lang'descr l) (lang'subtag l))

toPostgreSQL (Scr s) = "INSERT INTO Scripts (code, deprecated, comments, added) " ++
                          "VALUES (" ++
                            "'" ++ (script'subtag s) ++ "', " ++
                            (maybeToPostgreSQL (script'deprecated s)) ++ ", " ++ 
                            (maybeToPostgreSQL (script'comment s)) ++ ", " ++ 
                            "'" ++ (script'added s) ++ "');\n" ++
                        (descrToPostgreSQL "script" (script'descr s) (script'subtag s))

toPostgreSQL (Reg r) = "INSERT INTO Regions (code, deprecated, comments, added) " ++
                          "VALUES (" ++
                            "'" ++ (region'subtag r) ++ "', " ++
                            (maybeToPostgreSQL (region'deprecated r)) ++ ", " ++ 
                            (maybeToPostgreSQL (region'comment r)) ++ ", " ++ 
                            "'" ++ (region'added r) ++ "');\n" ++
                        (descrToPostgreSQL "region" (region'descr r) (region'subtag r))

toPostgreSQL (Var v) = "INSERT INTO Variants (code, deprecated, comments, added) " ++
                          "VALUES (" ++
                            "'" ++ (variant'subtag v) ++ "', " ++
                            (maybeToPostgreSQL (variant'deprecated v)) ++ ", " ++ 
                            (maybeToPostgreSQL (variant'comment v)) ++ ", " ++ 
                            "'" ++ (variant'added v) ++ "');\n" ++
                        (descrToPostgreSQL "variant" (variant'descr v) (variant'subtag v))