#=================================================
# SET ALL CONSTANTS
#=================================================

app=$YNH_APP_INSTANCE_NAME
dbname=$app
dbuser=$app
final_path="/opt/$app"
DATADIR="/home/$app"
REPO_PATH="$DATADIR/repositories"
DATA_PATH="$DATADIR/data"

# Detect the system architecture to download the right tarball
# NOTE: `uname -m` is more accurate and universal than `arch`
# See https://en.wikipedia.org/wiki/Uname
if [ -n "$(uname -m | grep 64)" ]; then
	architecture="x86-64"
elif [ -n "$(uname -m | grep 86)" ]; then
	architecture="i386"
elif [ -n "$(uname -m | grep arm)" ]; then
	architecture="arm"
else
	ynh_die "Unable to detect your achitecture, please open a bug describing \
        your hardware and the result of the command \"uname -m\"." 1
fi

#=================================================
# DEFINE ALL COMMON FONCTIONS
#=================================================

create_dir() {
    mkdir -p "$final_path/data"
    mkdir -p "$final_path/custom/conf"
    mkdir -p "$REPO_PATH"
    mkdir -p "$DATA_PATH/avatars"
    mkdir -p "$DATA_PATH/attachments"
    mkdir -p "/var/log/$app"
}

config_nginx() {
    if [ "$path_url" != "/" ]
    then
        ynh_replace_string "^#sub_path_only" "" "../conf/nginx.conf"
    fi
    ynh_add_nginx_config
}

config_gitea() {
    ynh_backup_if_checksum_is_different "$final_path/custom/conf/app.ini"

    cp ../conf/app.ini "$final_path/custom/conf"
    usermod -s /bin/bash $app

    if [ "$path_url" = "/" ]
    then
        ynh_replace_string "__URL__" "$domain" "$final_path/custom/conf/app.ini"
    else
        ynh_replace_string "__URL__" "$domain${path_url%/}" "$final_path/custom/conf/app.ini"
    fi

    ynh_replace_string "__REPOS_PATH__" "$REPO_PATH" "$final_path/custom/conf/app.ini"
    ynh_replace_string "__DB_PASSWORD__" "$dbpass" "$final_path/custom/conf/app.ini"
    ynh_replace_string "__DB_USER__" "$dbuser" "$final_path/custom/conf/app.ini"
    ynh_replace_string "__DOMAIN__" "$domain" "$final_path/custom/conf/app.ini"
    ynh_replace_string "__KEY__" "$key" "$final_path/custom/conf/app.ini"
    ynh_replace_string "__DATA_PATH__" "$DATA_PATH" "$final_path/custom/conf/app.ini"
    ynh_replace_string "__PORT__" $port "$final_path/custom/conf/app.ini"
    ynh_replace_string "__APP__" $app "$final_path/custom/conf/app.ini"

    ynh_store_file_checksum "$final_path/custom/conf/app.ini"
}

set_permission() {
    chown -R $app:$app "$final_path"
    chown -R $app:$app "/home/$app"
    chown -R $app:$app "/var/log/$app"
    chmod u=rwX,g=rX,o= "$final_path"
    chmod u=rwx,g=rx,o= "$final_path/$app"
    chmod u=rwX,g=rX,o= "/home/$app"
    chmod u=rwX,g=rX,o= "/var/log/$app"
}

# Download, check integrity, uncompress and patch the source from app.src
#
# The file conf/app.src need to contains:
#
# SOURCE_URL=Address to download the app archive
# SOURCE_SUM=Control sum
# # (Optional) Program to check the integrity (sha256sum, md5sum...)
# # default: sha256
# SOURCE_SUM_PRG=sha256
# # (Optional) Archive format
# # default: tar.gz
# SOURCE_FORMAT=tar.gz
# # (Optional) Put false if sources are directly in the archive root
# # default: true
# SOURCE_IN_SUBDIR=false
# # (Optionnal) Name of the local archive (offline setup support)
# # default: ${src_id}.${src_format}
# SOURCE_FILENAME=example.tar.gz 
# # (Optional) If it set as false don't extract the source.
# # (Useful to get a debian package or a python wheel.)
# # default: true
# SOURCE_EXTRACT=(true|false)
#
# Details:
# This helper downloads sources from SOURCE_URL if there is no local source
# archive in /opt/yunohost-apps-src/APP_ID/SOURCE_FILENAME
#
# Next, it checks the integrity with "SOURCE_SUM_PRG -c --status" command.
#
# If it's ok, the source archive will be uncompressed in $dest_dir. If the
# SOURCE_IN_SUBDIR is true, the first level directory of the archive will be
# removed.
#
# Finally, patches named sources/patches/${src_id}-*.patch and extra files in
# sources/extra_files/$src_id will be applied to dest_dir
#
#
# usage: ynh_setup_source dest_dir [source_id]
# | arg: dest_dir  - Directory where to setup sources
# | arg: source_id - Name of the app, if the package contains more than one app
ynh_setup_source () {
    local dest_dir=$1
    local src_id=${2:-app} # If the argument is not given, source_id equals "app"

    # Load value from configuration file (see above for a small doc about this file
    # format)
    local src_url=$(grep 'SOURCE_URL=' "$YNH_CWD/../conf/${src_id}.src" | cut -d= -f2-)
    local src_sum=$(grep 'SOURCE_SUM=' "$YNH_CWD/../conf/${src_id}.src" | cut -d= -f2-)
    local src_sumprg=$(grep 'SOURCE_SUM_PRG=' "$YNH_CWD/../conf/${src_id}.src" | cut -d= -f2-)
    local src_format=$(grep 'SOURCE_FORMAT=' "$YNH_CWD/../conf/${src_id}.src" | cut -d= -f2-)
    local src_extract=$(grep 'SOURCE_EXTRACT=' "$YNH_CWD/../conf/${src_id}.src" | cut -d= -f2-)
    local src_in_subdir=$(grep 'SOURCE_IN_SUBDIR=' "$YNH_CWD/../conf/${src_id}.src" | cut -d= -f2-)
    local src_filename=$(grep 'SOURCE_FILENAME=' "$YNH_CWD/../conf/${src_id}.src" | cut -d= -f2-)

    # Default value
    src_sumprg=${src_sumprg:-sha256sum}
    src_in_subdir=${src_in_subdir:-true}
    src_format=${src_format:-tar.gz}
    src_format=$(echo "$src_format" | tr '[:upper:]' '[:lower:]')
    src_extract=${src_extract:-true}
    if [ "$src_filename" = "" ] ; then
        src_filename="${src_id}.${src_format}"
    fi
    local local_src="/opt/yunohost-apps-src/${YNH_APP_ID}/${src_filename}"

    if test -e "$local_src"
    then    # Use the local source file if it is present
        cp $local_src $src_filename
    else    # If not, download the source
        wget -nv -O $src_filename $src_url
    fi

    # Check the control sum
    echo "${src_sum} ${src_filename}" | ${src_sumprg} -c --status \
        || ynh_die "Corrupt source"

    # Extract source into the app dir
    mkdir -p "$dest_dir"
    
    if ! "$src_extract"
    then
        mv $src_filename $dest_dir
    elif [ "$src_format" = "zip" ]
    then 
        # Zip format
        # Using of a temp directory, because unzip doesn't manage --strip-components
        if $src_in_subdir ; then
            local tmp_dir=$(mktemp -d)
            unzip -quo $src_filename -d "$tmp_dir"
            cp -a $tmp_dir/*/. "$dest_dir"
            ynh_secure_remove "$tmp_dir"
        else
            unzip -quo $src_filename -d "$dest_dir"
        fi
    else
        local strip=""
        if $src_in_subdir ; then
            strip="--strip-components 1"
        fi
        if [[ "$src_format" =~ ^tar.gz|tar.bz2|tar.xz$ ]] ; then
            tar -xf $src_filename -C "$dest_dir" $strip
        fi
        if [[ "$src_format" = "bin" ]] ; then
            chmod +x $src_filename
        else
            ynh_die "Archive format unrecognized."
        fi
    fi

    # Apply patches
    if (( $(find $YNH_CWD/../sources/patches/ -type f -name "${src_id}-*.patch" 2> /dev/null | wc -l) > "0" )); then
        local old_dir=$(pwd)
        (cd "$dest_dir" \
            && for p in $YNH_CWD/../sources/patches/${src_id}-*.patch; do \
                patch -p1 < $p; done) \
            || ynh_die "Unable to apply patches"
        cd $old_dir
    fi

    # Add supplementary files
    if test -e "$YNH_CWD/../sources/extra_files/${src_id}"; then
        cp -a $YNH_CWD/../sources/extra_files/$src_id/. "$dest_dir"
    fi
}