#!/bin/bash
# -*- coding: utf-8 mode: sh -*- vim:sw=4:sts=4:et:ai:si:sta:fenc=utf-8

function display_help() {
    uecho "$scriptname: générer un fichier $NAME

USAGE
    $scriptname [options] <file>

OPTIONS
    -t TEMPLATE
        Indiquer le modèle de fichier à utiliser pour la génération. Les valeurs
        valides sont:
            ${TEMPLATES[*]}
    -e, --edit
    -g, --no-edit
        Editer (resp. ne pas éditer) le fichier après l'avoir généré.
        Par défaut, l'éditeur est lancé après la génération.
    -f, --overwrite
        Ecraser le fichier s'il existe déjà
    -E, --encoding ENCODING
        Spécifier l'encoding à utiliser pour la génération du fichier"
}

NAME=text
TEMPLATES=(text conf sql sieve yaml)
NAMES=()
EXTS=(txt conf sql sieve yml yaml)

if [ $# -eq 2 ]; then
    if [ "$1" == "--matches-template" ]; then
        for template in "${TEMPLATES[@]}"; do
            [ "$template" == "$2" ] && exit 0
        done
        exit 1
    elif [ "$1" == "--matches-name" ]; then
        for name in "${NAMES[@]}"; do
            [ "$name" == "$2" ] && exit 0
        done
        exit 1
    elif [ "$1" == "--matches-ext" ]; then
        for ext in "${EXTS[@]}"; do
            [ "$ext" == "$2" ] && exit 0
        done
        exit 1
    fi
fi

#source /etc/ulib || exit 1
source "$(dirname "$0")/../ulib/ulib" || exit 1
urequire DEFAULTS

function check_overwrite() {
    if [ -e "$1" -a -z "$overwrite" ]; then
        eerror "$1: refus d'écraser un fichier déjà existant (utiliser -f)"
        return 1
    fi
    return 0
}

function generate_text() {
    local file="$1"
    local mode=text

    check_overwrite "$1" || return
    estep "$(ppath "$file")"
    echo >"$file" "# -*- coding: $encoding ${mode:+mode: $mode }-*- vim:sw=4:sts=4:et:ai:si:sta:fenc=$encoding"
    [ -n "$2" ] && array_add "$2" "$file"
    return 0
}

function generate_conf() {
    local file="$1"
    local mode=conf

    check_overwrite "$1" || return
    estep "$(ppath "$file")"
    echo >"$file" "# -*- coding: $encoding ${mode:+mode: $mode }-*- vim:sw=4:sts=4:et:ai:si:sta:fenc=$encoding"
    [ -n "$2" ] && array_add "$2" "$file"
    return 0
}

function generate_sql() {
    local file="$1"
    local mode=sql

    check_overwrite "$1" || return
    estep "$(ppath "$file")"
    echo >"$file" "\
-- -*- coding: $encoding ${mode:+mode: $mode }-*- vim:sw=4:sts=4:et:ai:si:sta:fenc=$encoding
-- @database xxx

start transaction;

commit;"
    [ -n "$2" ] && array_add "$2" "$file"
    return 0
}

function generate_sieve() {
    local file="$1"
    local mode=sieve

    check_overwrite "$1" || return
    estep "$(ppath "$file")"
    echo >"$file" "# -*- coding: $encoding ${mode:+mode: $mode }-*- vim:sw=4:sts=4:et:ai:si:sta:fenc=$encoding"
    [ -n "$2" ] && array_add "$2" "$file"
    return 0
}

function generate_yaml() {
    local file="$1"
    local mode=yaml

    check_overwrite "$1" || return
    estep "$(ppath "$file")"
    echo >"$file" "# -*- coding: $encoding ${mode:+mode: $mode }-*- vim:sw=4:sts=4:et:ai:si:sta:fenc=$encoding"
    [ -n "$2" ] && array_add "$2" "$file"
    return 0
}

template=
edit=1
overwrite=
encoding=
#executable=
parse_opts "${PRETTYOPTS[@]}" \
    --help '$exit_with display_help' \
    -t:,--template: template= \
    -e,--edit edit=1 \
    -g,--no-edit edit= \
    -f,--overwrite overwrite=1 \
    -E:,--encoding: encoding= \
    @ args -- "$@" && set -- "${args[@]}" || die "$args"
    # à rajouter ci-dessus si les fichiers peuvent être exécutables:
    #-x,--executable executable=1 \
    #-n,--no-executable executable= \

[ -n "$encoding" ] || encoding=utf-8

files2edit=()
r=0
for file in "$@"; do
    t="$template"
    if [ -z "$t" ]; then
        dir="$(dirname "$file")"
        name="$(basename "$file")"
        # Si template n'est pas spécifié, le déterminer le cas échéant à partir
        # du nom de fichier. Rajouter ici le code approprié.
    fi

    case "$t" in
    text|txt|t) generate_text "$file" files2edit || r=$?;;
    conf|c) generate_conf "$file" files2edit || r=$?;;
    sql) generate_sql "$file" files2edit || r=$?;;
    sieve) generate_sieve "$file" files2edit || r=$?;;
    yaml) generate_yaml "$file" files2edit || r=$?;;
    *) die "$NAME: template invalide: $t";;
    esac
done

if [ -n "$edit" -a "${#files2edit[*]}" -gt 0 ]; then
    "${EDITOR:-vi}" "${files2edit[@]}"
fi

exit $r