#!/bin/bash

declare -r GITHUB_REPOSITORY="alrra/dotfiles"

declare -r DOTFILES_ORIGIN="git@github.com:$GITHUB_REPOSITORY.git"
declare -r DOTFILES_TARBALL_URL="https://github.com/$GITHUB_REPOSITORY/tarball/main"
declare -r DOTFILES_UTILS_URL="https://raw.githubusercontent.com/$GITHUB_REPOSITORY/main/src/os/utils.sh"

# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

declare dotfilesDirectory="$HOME/projects/dotfiles"
declare skipQuestions=false

# ----------------------------------------------------------------------
# | Helper Functions                                                   |
# ----------------------------------------------------------------------

download() {
    local url="$1"
    local output="$2"

    if command -v "curl" &> /dev/null; then
        curl \
            --location \
            --silent \
            --show-error \
            --output "$output" \
            "$url" \
                &> /dev/null
        return $?
    elif command -v "wget" &> /dev/null; then
        wget \
            --quiet \
            --output-document="$output" \
            "$url" \
                &> /dev/null
        return $?
    fi

    return 1
}

download_dotfiles() {
    local tmpFile=""

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    print_in_purple "\n • Download and extract archive\n\n"

    tmpFile="$(mktemp /tmp/XXXXX)"

    download "$DOTFILES_TARBALL_URL" "$tmpFile"
    print_result $? "Download archive" "true"
    printf "\n"

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    if ! $skipQuestions; then
        ask_for_confirmation "Do you want to store the dotfiles in '$dotfilesDirectory'?"

        if ! answer_is_yes; then
            dotfilesDirectory=""
            while [ -z "$dotfilesDirectory" ]; do
                ask "Please specify another location for the dotfiles (path): "
                dotfilesDirectory="$(get_answer)"
            done
        fi

        # Ensure the `dotfiles` directory is available

        while [ -e "$dotfilesDirectory" ]; do
            ask_for_confirmation "'$dotfilesDirectory' already exists, do you want to overwrite it?"
            if answer_is_yes; then
                rm -rf "$dotfilesDirectory"
                break
            else
                dotfilesDirectory=""
                while [ -z "$dotfilesDirectory" ]; do
                    ask "Please specify another location for the dotfiles (path): "
                    dotfilesDirectory="$(get_answer)"
                done
            fi
        done

        printf "\n"
    else
        rm -rf "$dotfilesDirectory" &> /dev/null
    fi

    mkdir -p "$dotfilesDirectory"
    print_result $? "Create '$dotfilesDirectory'" "true"

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    # Extract archive in the `dotfiles` directory.

    extract "$tmpFile" "$dotfilesDirectory"
    print_result $? "Extract archive" "true"

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    rm -rf "$tmpFile"
    print_result $? "Remove archive"

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    cd "$dotfilesDirectory/src/os" \
        || return 1
}

download_utils() {
    local tmpFile=""

    tmpFile="$(mktemp /tmp/XXXXX)"

    download "$DOTFILES_UTILS_URL" "$tmpFile" \
        && . "$tmpFile" \
        && rm -rf "$tmpFile" \
        && return 0

   return 1
}

extract() {
    local archive="$1"
    local outputDir="$2"

    if command -v "tar" &> /dev/null; then
        tar \
            --extract \
            --gzip \
            --file "$archive" \
            --strip-components 1 \
            --directory "$outputDir"

        return $?
    fi

    return 1
}

verify_os() {
    local -r MINIMUM_MACOS_VERSION="26.0"

    local os_name="$(get_os)"
    local os_version="$(get_os_version)"

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    # Check if the OS is `macOS` and
    # it's above the required version.

    if [ "$os_name" = "macos" ]; then

        if is_supported_version "$os_version" "$MINIMUM_MACOS_VERSION"; then
            return 0
        else
            printf "Sorry, this script is intended only for macOS %s+" "$MINIMUM_MACOS_VERSION"
        fi

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    else
        printf "Sorry, this script is intended only for macOS!"
    fi

    return 1
}

# ----------------------------------------------------------------------
# | Main                                                               |
# ----------------------------------------------------------------------

main() {
    # Ensure that the following actions
    # are made relative to this file's path.

    cd "$(dirname "${BASH_SOURCE[0]}")" \
        || exit 1

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    # Load utils

    if [ -x "utils.sh" ]; then
        . "utils.sh" || exit 1
    else
        download_utils || exit 1
    fi

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    # Ensure the OS is supported and
    # it's above the required version.

    verify_os \
        || exit 1

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    skip_questions "$@" \
        && skipQuestions=true

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    ask_for_sudo

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    # Check if this script was run directly (./<path>/setup.sh),
    # and if not, it most likely means that the dotfiles were not
    # yet set up, and they will need to be downloaded.

    printf "%s" "${BASH_SOURCE[0]}" | grep "setup.sh" &> /dev/null \
        || download_dotfiles

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    ./create_symbolic_links.sh "$@"

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    ./create_local_config_files.sh

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    ./installs/main.sh

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    ./preferences/main.sh

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    if cmd_exists "git"; then
        if [ "$(git config --get remote.origin.url)" != "$DOTFILES_ORIGIN" ]; then
            ./initialize_git_repository.sh "$DOTFILES_ORIGIN"
        fi

        # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

        if ! $skipQuestions; then
            ./update_content.sh
        fi
    fi

    # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

    if ! $skipQuestions; then
        ./restart.sh
    fi
}

main "$@"