{- |
Export table data as OpenDocument Spreadsheet
<https://docs.oasis-open.org/office/OpenDocument/v1.3/>.
This format supports character encodings, fixed header rows and columns,
number formatting, text styles, merged cells, formulas, hyperlinks.
Currently we support Flat ODS, a plain uncompressed XML format.

This is derived from <https://hackage.haskell.org/package/classify-frog-0.2.4.3/src/src/Spreadsheet/Format.hs>

-}
module Hledger.Write.Ods (
    printFods,
    ) where

import Hledger.Write.Spreadsheet (Type(..), Style(..), Emphasis(..), Cell(..))
import Hledger.Data.Types (CommoditySymbol, AmountPrecision(..))
import Hledger.Data.Types (acommodity, aquantity, astyle, asprecision)

import qualified Data.Text.Lazy as TL
import qualified Data.Text as T
import Data.Text (Text)

import qualified Data.Map as Map
import qualified Data.Set as Set
import Data.Foldable (fold)
import Data.Map (Map)
import Data.Set (Set)
import Data.Maybe (mapMaybe)

import qualified System.IO as IO
import Text.Printf (printf)


printFods ::
    IO.TextEncoding ->
    Map Text ((Maybe Int, Maybe Int), [[Cell Text]]) -> TL.Text
printFods encoding tables =
    let fileOpen customStyles =
          map (map (\c -> case c of '\'' -> '"'; _ -> c)) $
          printf "<?xml version='1.0' encoding='%s'?>" (show encoding) :
          "<office:document" :
          "  office:mimetype='application/vnd.oasis.opendocument.spreadsheet'" :
          "  office:version='1.3'" :
          "  xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance'" :
          "  xmlns:xsd='http://www.w3.org/2001/XMLSchema'" :
          "  xmlns:text='urn:oasis:names:tc:opendocument:xmlns:text:1.0'" :
          "  xmlns:style='urn:oasis:names:tc:opendocument:xmlns:style:1.0'" :
          "  xmlns:meta='urn:oasis:names:tc:opendocument:xmlns:meta:1.0'" :
          "  xmlns:config='urn:oasis:names:tc:opendocument:xmlns:config:1.0'" :
          "  xmlns:xlink='http://www.w3.org/1999/xlink'" :
          "  xmlns:fo='urn:oasis:names:tc:opendocument:xmlns:xsl-fo-compatible:1.0'" :
          "  xmlns:ooo='http://openoffice.org/2004/office'" :
          "  xmlns:office='urn:oasis:names:tc:opendocument:xmlns:office:1.0'" :
          "  xmlns:table='urn:oasis:names:tc:opendocument:xmlns:table:1.0'" :
          "  xmlns:number='urn:oasis:names:tc:opendocument:xmlns:datastyle:1.0'" :
          "  xmlns:of='urn:oasis:names:tc:opendocument:xmlns:of:1.2'" :
          "  xmlns:field='urn:openoffice:names:experimental:ooo-ms-interop:xmlns:field:1.0'" :
          "  xmlns:form='urn:oasis:names:tc:opendocument:xmlns:form:1.0'>" :
          "<office:styles>" :
          "  <style:style style:name='head' style:family='table-cell'>" :
          "    <style:paragraph-properties fo:text-align='center'/>" :
          "    <style:text-properties fo:font-weight='bold'/>" :
          "  </style:style>" :
          "  <style:style style:name='foot' style:family='table-cell'>" :
          "    <style:text-properties fo:font-weight='bold'/>" :
          "  </style:style>" :
          "  <style:style style:name='amount' style:family='table-cell'>" :
          "    <style:paragraph-properties fo:text-align='end'/>" :
          "  </style:style>" :
          "  <style:style style:name='total-amount' style:family='table-cell'>" :
          "    <style:paragraph-properties fo:text-align='end'/>" :
          "    <style:text-properties fo:font-weight='bold'/>" :
          "  </style:style>" :
          "  <number:date-style style:name='iso-date'>" :
          "    <number:year number:style='long'/>" :
          "    <number:text>-</number:text>" :
          "    <number:month number:style='long'/>" :
          "    <number:text>-</number:text>" :
          "    <number:day number:style='long'/>" :
          "  </number:date-style>" :
          "  <style:style style:name='date' style:family='table-cell'" :
          "      style:data-style-name='iso-date'/>" :
          "  <style:style style:name='foot-date' style:family='table-cell'" :
          "      style:data-style-name='iso-date'>" :
          "    <style:text-properties fo:font-weight='bold'/>" :
          "  </style:style>" :
          customStyles ++
          "</office:styles>" :
          []

        fileClose =
          "</office:document>" :
          []

        tableConfig tableNames =
          " <office:settings>" :
          "  <config:config-item-set config:name='ooo:view-settings'>" :
          "   <config:config-item-map-indexed config:name='Views'>" :
          "    <config:config-item-map-entry>" :
          "     <config:config-item-map-named config:name='Tables'>" :
          (fold $
           flip Map.mapWithKey tableNames $ \tableName (mTopRow,mLeftColumn) ->
             printf "      <config:config-item-map-entry config:name='%s'>" tableName :
             (flip foldMap mLeftColumn $ \leftColumn ->
                "       <config:config-item config:name='HorizontalSplitMode' config:type='short'>2</config:config-item>" :
                printf "       <config:config-item config:name='HorizontalSplitPosition' config:type='int'>%d</config:config-item>" leftColumn :
                printf "       <config:config-item config:name='PositionRight' config:type='int'>%d</config:config-item>" leftColumn :
                []) ++
             (flip foldMap mTopRow $ \topRow ->
                "       <config:config-item config:name='VerticalSplitMode' config:type='short'>2</config:config-item>" :
                printf "       <config:config-item config:name='VerticalSplitPosition' config:type='int'>%d</config:config-item>" topRow :
                printf "       <config:config-item config:name='PositionBottom' config:type='int'>%d</config:config-item>" topRow :
                []) ++
             "      </config:config-item-map-entry>" :
             []) ++
          "     </config:config-item-map-named>" :
          "    </config:config-item-map-entry>" :
          "   </config:config-item-map-indexed>" :
          "  </config:config-item-set>" :
          " </office:settings>" :
          []

        tableOpen name =
          "<office:body>" :
          "<office:spreadsheet>" :
          printf "<table:table table:name='%s'>" name :
          []

        tableClose =
          "</table:table>" :
          "</office:spreadsheet>" :
          "</office:body>" :
          []

    in  TL.unlines $ map (TL.fromStrict . T.pack) $
        fileOpen
          (let styles = cellStyles (foldMap (concat.snd) tables) in
           (numberConfig =<< Set.toList (Set.map snd styles))
           ++
           (cellConfig =<< Set.toList styles)) ++
        tableConfig (fmap fst tables) ++
        (Map.toAscList tables >>= \(name,(_,table)) ->
            tableOpen name ++
            (table >>= \row ->
                "<table:table-row>" :
                (row >>= formatCell) ++
                "</table:table-row>" :
                []) ++
            tableClose) ++
        fileClose


cellStyles :: [Cell Text] -> Set (Emphasis, (CommoditySymbol, AmountPrecision))
cellStyles =
    Set.fromList .
    mapMaybe (\cell ->
        case cellType cell of
            TypeAmount amt ->
                Just
                    (case cellStyle cell of
                        Body emph -> emph
                        Head -> Total,
                     (acommodity amt, asprecision $ astyle amt))
            _ -> Nothing)

numberStyleName :: (CommoditySymbol, AmountPrecision) -> String
numberStyleName (comm, prec) =
    printf "%s-%s" comm $
    case prec of
        NaturalPrecision -> "natural"
        Precision k -> show k

numberConfig :: (CommoditySymbol, AmountPrecision) -> [String]
numberConfig (comm, prec) =
    let precStr =
            case prec of
                NaturalPrecision -> ""
                Precision k -> printf " number:decimal-places='%d'" k
        name = numberStyleName (comm, prec)
    in
    printf "  <number:number-style style:name='number-%s'>" name :
    printf "    <number:number number:min-integer-digits='1'%s/>" precStr :
    printf "    <number:text>%s%s</number:text>"
      (if T.null comm then "" else " ") comm :
    "  </number:number-style>" :
    []

emphasisName :: Emphasis -> String
emphasisName emph =
    case emph of
        Item -> "item"
        Total -> "total"

cellConfig :: (Emphasis, (CommoditySymbol, AmountPrecision)) -> [String]
cellConfig (emph, numParam) =
    let name = numberStyleName numParam in
    let style :: String
        style =
            printf "style:name='%s-%s' style:data-style-name='number-%s'"
                (emphasisName emph) name name in
    case emph of
        Item ->
            printf "  <style:style style:family='table-cell' %s/>" style :
            []
        Total ->
            printf "  <style:style style:family='table-cell' %s>" style :
            "    <style:text-properties fo:font-weight='bold'/>" :
            "  </style:style>" :
            []


formatCell :: Cell Text -> [String]
formatCell cell =
    let style, valueType :: String
        style =
          case (cellStyle cell, cellType cell) of
            (Body emph, TypeAmount amt) -> tableStyle $ numberStyle emph amt
            (Body Item, TypeString) -> ""
            (Body Item, TypeMixedAmount) -> tableStyle "amount"
            (Body Item, TypeDate) -> tableStyle "date"
            (Body Total, TypeString) -> tableStyle "foot"
            (Body Total, TypeMixedAmount) -> tableStyle "total-amount"
            (Body Total, TypeDate) -> tableStyle "foot-date"
            (Head, _) -> tableStyle "head"
        numberStyle emph amt =
            printf "%s-%s"
                (emphasisName emph)
                (numberStyleName (acommodity amt, asprecision $ astyle amt))
        tableStyle = printf " table:style-name='%s'"

        valueType =
            case cellType cell of
                TypeAmount amt ->
                    printf
                        "office:value-type='float' office:value='%s'"
                        (show $ aquantity amt)
                TypeDate ->
                    printf
                        "office:value-type='date' office:date-value='%s'"
                        (cellContent cell)
                _ -> "office:value-type='string'"

    in
    printf "<table:table-cell%s %s>" style valueType :
    printf "<text:p>%s</text:p>" (escape $ T.unpack $ cellContent cell) :
    "</table:table-cell>" :
    []

escape :: String -> String
escape =
    concatMap $ \c ->
        case c of
            '\n' -> "&#10;"
            '&' -> "&amp;"
            '<' -> "&lt;"
            '>' -> "&gt;"
            '"' -> "&quot;"
            '\'' -> "&apos;"
            _ -> [c]