#!/usr/bin/env bash
CBUILD_BOOTSTRAP_VERSION=1.0.1
set -eo pipefail

function version_parse {
    local value="$1"
    var_name="$2"
    IFS_backup="$IFS"
    IFS='.'
    local v_array=($value)
    IFS="$IFS_backup"
    eval ${var_name}_version_major=${v_array[0]}
    eval ${var_name}_version_minor=${v_array[1]}
    eval ${var_name}_version_patch=${v_array[2]}
}

function safeprint {
    printf "%s" "$@"
}

function exec_script_line {
    local script="$1"
    local line_num="$2"
    local line_str="$(sed $line_num'!d' $script)"
    if [ -z "$line_str" ]; then
        echo "script line is empty"
        exit 1
    fi
    eval "$line_str"
}

function print_version_list {
    dir_local="$HOME/.local/share/cbuild"
    dir_global="/usr/local/share/cbuild"
    files=""
    if [ -d "$dir_local" ]; then
        files+="$(find $dir_local -name 'CBUILD_VERSION')"
    fi
    if [ -d "$dir_global" ]; then
        files+="$(find $dir_global -name 'CBUILD_VERSION')"
    fi
    for f in $files; do
        cat $f | sed '$a\'
    done | sort -V
}

function print_help {
    echo "cbuild-bootstrap v$CBUILD_BOOTSTRAP_VERSION"
    echo "Script that launches a specific cbuild version selected by user or defined in a project config."
    echo "Usage: cbuild [OPTIONS]"
    echo "Options:"
    echo "    -h, --help         Show this message"
    echo "    -v, --version      Shows version"
    echo "    -c, --config FILE  Set project config file path (default=./project.config)"
    echo "    --list-versions    Shows list of installed cbuild versions"
}

# parse command line arguments
project_config_path="./project.config"
args=($@)
args_count=${#args[@]}
i=0
if [ $args_count -eq 0 ]; then
    print_help
fi
while [ $i -lt $args_count ]
do
    case "${args[i]}" in
        '-v' | '--version')
            echo "cbuild-bootstrap v$CBUILD_BOOTSTRAP_VERSION"
            ;;
        '-h' | '--help')
            print_help
            ;;
        '-c' | '--config')
            i=$((i+1))
            project_config_path="${args[i]}"
            ;;
        '--list-versions')
            print_version_list
            exit 0
            ;;
        *)
            ;;
    esac
    i=$((i+1))
done

if [ -z "$CBUILD_VERSION" ]; then
    if [ -f "$project_config_path" ]; then
        # read version from project config
        exec_script_line "$project_config_path" 2
    else
        echo "project config not found"
        echo "list of installed cbuild versions:"
        versions=$(print_version_list)

        echo "$versions"
        latest_version=$(echo "$versions" | tail -n 1)
        echo "select version (default=$latest_version):"
        read -r CBUILD_VERSION
        [ -z "$CBUILD_VERSION" ] && CBUILD_VERSION=$latest_version
    fi
fi

version_parse "$CBUILD_VERSION"
cbuild_ommand="cbuild${_version_major}.${_version_minor} $@"

LOG_FILE="$(realpath cbuild.log)"
set +eo pipefail
# enable logging stdout and stderr to file
$cbuild_ommand 2>&1 | tee "$LOG_FILE"
# log file can be deleted by clean task
if [ -f "$LOG_FILE" ]; then
    # remove terminal escape codes
    sed -e 's/[^[:blank:][:print:]]//g' \
        -e 's/\[0;[0-9][0-9]m//g' \
        -e 's/\[0;[0-9]m//g' \
        -e 's/\[[0-9][0-9]m//g' \
        -e 's/\[[0-9]m//g' \
        -e 's/  H  //g' \
        -e 's/\[3gH  //g' \
        "$LOG_FILE" > "$LOG_FILE.clean"
    mv "$LOG_FILE.clean" "$LOG_FILE"
fi