#!/bin/bash

cd $(dirname $(realpath $0))
source "./lib/common.sh"
source "./lib/tests_coordination.sh"
source "./lib/build_base_lxc.sh"

print_help() {
    cat << EOF
 Usage: package_check.sh [OPTION]... PACKAGE_TO_CHECK

    -b, --branch=BRANCH  Specify a branch to check.
    -i, --interactive    Wait for the user to continue before each remove.
    -s, --force-stop     Force the stop of running package_check
    -r, --rebuild        (Re)Build the base container
                         (N.B.: you're not supposed to use this option, images
                         are supposed to be fetch from devbaseimgs.yunohost.org automatically)
    -h, --help           Display this help
EOF
exit 0
}


#=================================================
# Pase CLI arguments
#=================================================

# If no arguments provided
# Print the help and exit
[ "$#" -eq 0 ] && print_help

gitbranch=""
interactive=0
rebuild=0
force_stop=0

function parse_args() {

    local getopts_built_arg=()

    # Read the array value per value
    for i in `seq 0 $(( ${#arguments[@]} -1 ))`
    do
        if [[ "${arguments[$i]}" =~ "--branch=" ]]
        then
            getopts_built_arg+=(-b)
            arguments[$i]=${arguments[$i]//--branch=/}
        fi
        # For each argument in the array, reduce to short argument for getopts
        arguments[$i]=${arguments[$i]//--interactive/-i}
        arguments[$i]=${arguments[$i]//--rebuild/-r}
        arguments[$i]=${arguments[$i]//--force-stop/-s}
        arguments[$i]=${arguments[$i]//--help/-h}
        getopts_built_arg+=("${arguments[$i]}")
    done

    # Read and parse all the arguments
    # Use a function here, to use standart arguments $@ and be able to use shift.
    parse_arg () {
        while [ $# -ne 0 ]
        do
            # If the paramater begins by -, treat it with getopts
            if [ "${1:0:1}" == "-" ]
            then
                # Initialize the index of getopts
                OPTIND=1
                # Parse with getopts only if the argument begin by -
                getopts ":b:irsh" parameter || true
                case $parameter in
                    b)
                        # --branch=branch-name
                        gitbranch="-b $OPTARG"
                        shift_value=2
                        ;;
                    i)
                        # --interactive
                        interactive=1
                        shift_value=1
                        ;;
                    r)
                        # --rebuild
                        rebuild=1
                        shift_value=1
                        ;;
                    s)
                        # --force-stop
                        force_stop=1
                        shift_value=1
                        ;;
                    h)
                        # --help
                        print_help
                        ;;
                    \?)
                        echo "Invalid argument: -${OPTARG:-}"
                        print_help
                        ;;
                    :)
                        echo "-$OPTARG parameter requires an argument."
                        print_help
                        ;;
                esac
                # Otherwise, it's not an option, it's an operand
            else
                path_to_package_to_test="$1"
                shift_value=1
            fi
            # Shift the parameter and its argument
            shift $shift_value
        done
    }

    # Call parse_arg and pass the modified list of args as a array of arguments.
    parse_arg "${getopts_built_arg[@]}"
}

arguments=("$@")
parse_args

#=================================================
# Cleanup / force-stop
#=================================================

function cleanup()
{
    trap '' SIGINT # Disable ctrl+c in this function
    LXC_RESET

    [ -n "$TEST_CONTEXT" ] && rm -rf "$TEST_CONTEXT"
    [ -n "$lock_file" ] && rm -f "$lock_file"
}

if [[ $force_stop == 1 ]]
then
    package_check_pid="$(cat "./pcheck.lock" 2> /dev/null | cut -d: -f3)"
    if [ -n "$package_check_pid" ]; then
        kill -15 $package_check_pid
    fi
    cleanup
    exit 0
fi

#=================================================
# Check if the lock file exist
#=================================================

# If the lock file exist and corresponding process still exists
if test -e "$lock_file" && ps --pid "$(cat pcheck.lock | cut -d: -f3)" | grep --quiet "$(cat pcheck.lock | cut -d: -f3)"
then
    if [ $interactive -eq 1 ]; then
        echo "The lock file $lock_file already exists."
        echo -n "Do you want to continue anyway? (y/n) :"
        read answer
    else
        log_critical "The lock file $lock_file already exists. Package check won't continue."
    fi
    # Set the answer at lowercase only
    answer=${answer,,}
    if [ "${answer:0:1}" != "y" ]
    then
        log_critical "Package check cancelled"
    fi
fi
# Create the lock file
# $$ is the PID of package_check itself.
echo "start:$(date +%s):$$" > "$lock_file"

#==========================
# Cleanup
# N.B. the traps are added AFTER the lock is taken
# because we don't want to mess with with the lock and LXC
# it we ain't the process with the lock...
#==========================

trap cleanup EXIT
trap 'exit 2' TERM KILL

#==========================
# Main code
#==========================

assert_we_are_connected_to_the_internets
assert_we_have_all_dependencies

if [[ $rebuild == 1 ]]
then
    rebuild_base_lxc 2>&1 | tee -a "./build_base_lxc.log"
    exit 0
fi

#self_upgrade # FIXME renenable this later
fetch_or_upgrade_package_linter

readonly TEST_CONTEXT=$(mktemp -d /tmp/package_check.XXXXXX)

fetch_package_to_test "$path_to_package_to_test"
run_all_tests

exit 0