#!/usr/bin/env bash

include cbuild/myprint.sh
include cbuild/functions.sh
include cbuild/detect_os.sh

function load_config {
    local current_config_path="$1"
    local default_config_path="$2"
    TASK="$3"
    if [ -z "$current_config_path" ]; then
        error "current_config_path is null"
    fi
    if [ -z "$default_config_path" ]; then
        error "default_config_path is null"
    fi

    OS=$(detect_os)
    myprint "${GREEN}detected OS: $OS"

    function exec_script_line {
        local script="$1"
        local line_num="$2"
        myprint "${BLUE}reading line $line_num from $script"
        local line_str="$(sed $line_num'!d' $script)"
        myprint "$line_str"
        eval "$line_str"
    }

    # getting version of cbuild installation
    if [ -z "$INSTALLED_CBUILD_VERSION" ]; then
        error "couldnt get current cbuild installation version"
    fi

    # getting version of default config
    exec_script_line "$default_config_path" 3
    DEFAULT_CONFIG_VERSION="$CONFIG_VERSION"
    unset CONFIG_VERSION

    # undefined task
    [ -z "$TASK" ] && TASK="no_task"

    # error on undefined
    set -u

    # reading current config or creating default
    if [ ! -f "$current_config_path" ]; then
        myprint "${YELLOW}$current_config_path doesn't exist"
        cp "$default_config_path" "$current_config_path"
        myprint "${YELLOW}Created copy (${current_config_path}) of default config (${default_config_path})"
    fi

    myprint "${BLUE}reading $current_config_path"
    include "$current_config_path"

    myprint "${WHITE}project: ${CYAN}$PROJECT"

    myprint "${WHITE}${current_config_path} cbuild version: ${CYAN}$CBUILD_VERSION"
    myprint "${WHITE}installed cbuild version: ${CYAN}$INSTALLED_CBUILD_VERSION"
    myprint "${WHITE}${current_config_path} version: ${CYAN}$CONFIG_VERSION"
    myprint "${WHITE}${default_config_path} version: ${CYAN}$DEFAULT_CONFIG_VERSION"

    # checking versions
    if [ ! "$CBUILD_VERSION" -eq "$INSTALLED_CBUILD_VERSION" ]; then
        error "config was created for outdated cbuild version"
    fi
    if [ ! "$CONFIG_VERSION" -eq "$DEFAULT_CONFIG_VERSION" ]; then
        error "config version isn't correct"
    fi

    mkdir -p "$OUTDIR"
    mkdir -p "$OBJDIR/libs"
    mkdir -p "$OBJDIR/objects"
    mkdir -p "$OBJDIR/profile"

    # dont thorw error on undefined variable
    set +u

    myprint "${GREEN}cbuild initialized!"
}