#!/bin/sh

set -e

. ${A3_LIB_PATH:-/usr/lib/a3}/include.sh
a3include_lib a3
a3include_lib log
a3include_lib util

A3_FILE=$1
[ -z "$A3_FILE" ] && exit 1
if ! [ -f "$A3_FILE" ]; then
    LOGD "lfa3"
    A3_FILE=$(a3index_find $A3_FILE)
    [ -z "$A3_FILE" ] && fatal_log "no a3 file found"
fi
shift

name=$(a3ff a3read_meta name)
description=$(a3ff a3read_meta description)
author=$(a3ff a3read_meta author)
url=$(a3ff a3read_meta url)
require_value meta:a3.name $name

echo "name: $name"
[ -n "$description" ] && echo "description: $description"
[ -n "$author" ] && echo "author: $author"
[ -n "$url" ] && echo "url: $url"
echo "status: $(a3index_current_status $name || echo "not installed")"
echo "---"

A3_INSTALL_BIN_PATH=${A3_INSTALL_BIN_PATH:-/usr/bin}
A3_INSTALL_LIB_PATH=${A3_INSTALL_LIB_PATH:-/usr/lib}

main() {
    case $1 in
    update)
        a3index_is $name installed || fatal_log not installed.
        a3index_update $name pending
        A3_FILE=$(a3index_find $name)
        main install
        ;;
    install)
        a3index_is $name installed && fatal_log "$name is already installed."
        oldpwd=$(pwd)
        if [ -n "$(a3ff a3read_declaration declare_workdir | head -n 1)" ]; then
            cd $(a3ff a3read_declaration declare_workdir | head -n 1)
        fi
        a3ff a3index_create $name
        a3ff a3read_declaration declare_executable | while read ex; do
            [ -z "$ex" ] && continue
            filename=$(basename $ex)
            if [ -f "$A3_INSTALL_BIN_PATH/$filename" ]; then
                LOGW "overwriting $A3_INSTALL_BIN_PATH/$filename..."
            else
                LOGI "copying $ex to $A3_INSTALL_BIN_PATH/$filename..."
            fi
            cp $ex $A3_INSTALL_BIN_PATH/$filename
            chmod +x $A3_INSTALL_BIN_PATH/$filename
        done
        a3ff a3read_declaration declare_library | while read lib; do
            [ -z "$lib" ] && continue
            if [ -d "$A3_INSTALL_LIB_PATH/$name" ]; then
                LOGW "overwriting $A3_INSTALL_LIB_PATH/$name..."
            else
                LOGI "copying library..."
            fi
            cp -r $lib/. $A3_INSTALL_LIB_PATH/$name
        done
        a3index_update $name installed
        cd $oldpwd
        ;;
    eval) shift; $@ ;;
    remove)
        a3index_is $name installed || fatal_log "$name is not installed."
        a3ff a3read_declaration declare_executable | while read ex; do
            filename=$(basename $ex)
            [ -f "$A3_INSTALL_BIN_PATH/$filename" ] || fatal_log "$A3_INSTALL_BIN_PATH/$filename does not exist"
            LOGI "removing $A3_INSTALL_BIN_PATH/$filename..."
            rm $A3_INSTALL_BIN_PATH/$filename
        done
        a3ff a3read_declaration declare_library | while read lib; do
            [ -d "$A3_INSTALL_LIB_PATH/$name" ] || continue
            LOGI "removing library..."
            rm -r $A3_INSTALL_LIB_PATH/$name
        done
        a3index_update $name cache
        ;;
    list)
        for f in $(find $A3_INDEX_ROOT -iname "*.a3"); do
            echo "$(a3read_meta "$f" name): $(basename $(dirname $f))"
        done
    esac
}

main $@