#!/bin/bash

set -eo pipefail

# export SAMPORAPELI_DOTFILES_UNATTENDED_INSTALL=true to perform the installation without confirmation dialogs
UNATTENDED=$([[ "$SAMPORAPELI_DOTFILES_UNATTENDED_INSTALL" == "true" ]] && echo "true" || echo "false")

GIT_PATH="samporapeli/dotfiles.git"

function clone_dotfiles_repository() {
    if [[ -z "$GIT_PREFIX" ]] || [[ -z "$GIT_PATH" ]]; then
        echo "Error: function 'clone_dotfiles_repository' was called, but GIT_PREFIX or GIT_PATH is not set"
        exit 1
    fi
    echo ".dotfiles" >> "$HOME/.gitignore"
    dotfiles clone --bare "$GIT_PREFIX$GIT_PATH" "$HOME/.dotfiles"
    dotfiles config --local status.showUntrackedFiles no
}

function replace_current_configuration() {
    echo Copying files...
    dotfiles checkout -f main
}

function update_submodules() {
    echo Downloading git submodules...
    dotfiles submodule init
    dotfiles submodule update
}

function install_antigen_plugins() {
    if command_exists zsh; then
        echo "Launching zsh to install Antigen plugins"
        zsh -ic "exit"
    else
        echo "'zsh' is not installed, skipping Antigen plugin install"
    fi
}

function install_dotfiles() {

    # Get the necessary functions used
    if command -v curl &> /dev/null; then
        source <(curl -s https://raw.githubusercontent.com/samporapeli/dotfiles/main/.shell_scripts)
    elif command -v wget &> /dev/null; then
        source <(wget -qO - https://raw.githubusercontent.com/samporapeli/dotfiles/main/.shell_scripts)
    else
        echo "You must have curl or wget installed to complete installation."
        exit 1
    fi

    # Unattended install
    if [[ $UNATTENDED == "true" ]]; then
        echo "Performing an unattended install of samporapeli/dotfiles for user '$(whoami)'"
        GIT_PREFIX="https://github.com/"
        clone_dotfiles_repository
        replace_current_configuration
        update_submodules
        install_antigen_plugins
        echo 'Unattended install of samporapeli/dotfiles completed!'
        exit
    fi

    # Attended install
    echo "Do you want to replace current dotfiles, just clone the repository for viewing or do nothing?"
    echo -n "Type 'replace', 'clone' or 'exit': "
    read INSTALL_TYPE

    if [ "$INSTALL_TYPE" = "replace" ] || [ "$INSTALL_TYPE" = "clone" ]; then
        if ! command_exists git; then
            echo "Git must be installed"
            if echo -n "Try to install now? " && y_n_dialog y; then
                install_packages git
            else
                echo "Please install git manually before running this installation script."
                echo "Aborting..."
                exit 1
            fi
        fi
        echo -n "Clone repository over ssh? "
        if y_n_dialog y; then
            GIT_PREFIX="git@github.com:"
        else
            GIT_PREFIX="https://github.com/"
        fi
        if command_exists apt-get; then
            echo -n "Install some useful packages (list: https://raw.githubusercontent.com/samporapeli/dotfiles/main/Documents/useful_packages_apt.txt) "
            if y_n_dialog y; then
                if command_exists curl; then
                    install_packages $(curl -s 'https://raw.githubusercontent.com/samporapeli/dotfiles/main/Documents/useful_packages_apt.txt' | tr '\n' ' ')
                elif command_exists wget; then
                    install_packages $(wget -qO - 'https://raw.githubusercontent.com/samporapeli/dotfiles/main/Documents/useful_packages_apt.txt' | tr '\n' ' ')
                else
                    echo "curl or wget required, skipping..."
                fi
            fi
        fi
        if ! command_exists zsh; then
            echo -n "Install zsh? "
            if y_n_dialog y; then
                install_packages zsh
            fi
        fi
        if [ "$INSTALL_TYPE" = "replace" ]; then
            clone_dotfiles_repository
            echo -n "Destroy previous configuration? This cannot be undone. "
            if y_n_dialog n; then
                replace_current_configuration
                update_submodules
                install_antigen_plugins
            else
                echo Aborting...
                exit
            fi
        elif [ "$INSTALL_TYPE" = "clone" ]; then
            git clone "$GIT_PREFIX$GIT_PATH"
        fi
    elif [ "$INSTALL_TYPE" = "exit" ]; then
        exit
    else
        echo Invalid input, exiting
        exit
    fi
}
install_dotfiles