#!/usr/bin/zsh

setopt extendedglob

VERSION="0.0.1" # Sat-2024-02-24
ZREP="Zsh Repository Tool"
# Define the path to .zreprc
ZREP_CONFIG="${HOME}/.zreprc"

function zrep_fpath() {
    local base_dir="${1}"

    # Check if the base directory exists
    if [[ ! -d "${base_dir}" ]]; then
        echo "Error: Base directory '${base_dir}' does not exist."
        return 1
    fi

    # Add directories containing at least one file to fpath
    for dir in ${base_dir}/**/*(/N); do
        if [[ -n $(ls -A "${dir}/") ]]; then
            fpath=(${dir} $fpath)
        fi
    done
}

zrep_fpath ${HOME}/.zrep/functions
autoload -Uz zini

# List of colors available
typeset -A colors
colors=(
  black "\033[0;30m"
  red "\033[0;31m"
  green "\033[0;32m"
  yellow "\033[0;33m"
  blue "\033[0;34m"
  magenta "\033[0;35m"
  cyan "\033[0;36m"
  white "\033[0;37m"
  bold_black "\033[1;30m"
  bold_red "\033[1;31m"
  bold_green "\033[1;32m"
  bold_yellow "\033[1;33m"
  bold_blue "\033[1;34m"
  bold_magenta "\033[1;35m"
  bold_cyan "\033[1;36m"
  bold_white "\033[1;37m"
  black_bg "\033[40m"
  red_bg "\033[41m"
  green_bg "\033[42m"
  yellow_bg "\033[43m"
  blue_bg "\033[44m"
  magenta_bg "\033[45m"
  cyan_bg "\033[46m"
  white_bg "\033[47m"
  end "\033[0m"
)

function zrep_main_version_string() {
  echo "${colors[bold_black]}${colors[white_bg]} ${ZREP} ${colors[end]}${colors[bold_white]}${colors[black_bg]} ${VERSION} ${colors[end]}"
}

function zrep_version() {
  zrep_msg info "\nCreated by kekePower - 2024"
  zrep_msg info "License: MIT"
  zrep_msg info "https://git.kekepower.com/kekePower/zrep/"
  zrep_msg info "Please see '${colors[green]}${ZSH_SCRIPT:t} help${colors[end]}'${colors[yellow]} for more info"
  exit
}

function zrep_msg() {
    local color=${colors[end]} # Default to no color if type is unrecognized
    case ${1} in
        std) color=${colors[green]} ;;
        info) color=${colors[yellow]} ;;
        debug) color=${colors[red]} ;;
        other) color=${colors[bold_yellow]} ;;
        sub) color=${colors[magenta]} ;;
        main) color="${colors[white]} ${colors[green_bg]}" ;;
    esac
    printf "${color}%b${colors[end]}\n" "${2}"
}

function zrep_init() {
    local zshrc_file="${HOME}/.zshrc"
    local addons_file="${HOME}/.zrep_addons"
    local install_dir

    # Check if .zreprc exists
    if [[ ! -f ${ZREP_CONFIG} ]]; then
        echo "${ZREP_CONFIG} not found. Creating it..."
        # Prompt user for install directory
        read "install_dir?Enter zrep installation directory [${HOME}/.zrep]: "
        install_dir=${install_dir:-"${HOME}/.zrep"}

        # Write to .zreprc
        echo "[main]" > ${ZREP_CONFIG}
        echo "zrep_install_dir='${install_dir}'" >> "${ZREP_CONFIG}"
    else
        echo "Loading configuration from ${ZREP_CONFIG}"
        zini ${ZREP_CONFIG}
        install_dir=${config[main_zrep_install_dir]}
    fi

    # Ensure zrep_install_dir exists
    mkdir -p "${install_dir}/functions/zini"
    curl -s https://raw.githubusercontent.com/kekePower/zini/main/zini -o "${install_dir}/functions/zini/zini"
    echo "fpath=(${install_dir}/functions/zini \$fpath)" >> ${zshrc_file}

    # Check if .zshrc already sources .zrep_addons, if not, add it
    if ! grep -q "source ${addons_file}" "${zshrc_file}"; then
        echo "Adding source command for .zrep_addons to .zshrc..."
        echo "source ${addons_file}" >> "${zshrc_file}"
    fi

    # Create or update the .zrep_addons file
    if [[ ! -f ${addons_file} ]]; then
        echo "Creating file ${addons_file}..."
        cat > "${addons_file}" <<EOF
# Source the .addons file from the zrep installation directory
source "${install_dir}/.addons"

# If addons array is defined and not empty, add its elements to fpath
if [[ -n \${addons[@]} ]]; then
    for addon in "\${addons[@]}"; do
        if [[ -d \${addon} ]] && [[ ! " \${fpath[*]} " =~ " \${addon} " ]]; then
            fpath=(\${addon} "\${fpath[@]}")  # Prepend the new addon to fpath
        fi
    autoload -Uz $(basename ${addon})
    done
else
    echo "zrep: No addons enabled."
fi
EOF
        echo "File .zrep_addons created and configured."
    else
        echo "File .zrep_addons already exists. Review manually if update is needed."
    fi

    echo "zrep initialization complete."
}

# Function to parse remote JSON data and extract author, script, and version
function zrep_parse_remote() {

    local url="${1}"
    local json_data
    
    # Fetch JSON data from the URL
    json_data=$(curl -s "${url}")

    # Extract author, script, and version using jq
    author=$(echo "${json_data}" | jq -r '.authors[0].name')
    script=$(echo "${json_data}" | jq -r '.authors[0].scripts[0].name')
    version=$(echo "${json_data}" | jq -r '.authors[0].scripts[0].version')
    
    # Set the variables as global
    export author
    export script
    export version

}

# Function to write to installed.json after successful install
function zrep_update_installed_json() {
    local author="${1}"
    local script="${2}"
    local version="${3}"
    local json_file="${config[main_zrep_install_dir]}/installed.json"

    # Check if the JSON file exists and create it if not
    if [[ ! -f "${json_file}" ]]; then
        echo "{}" > "${json_file}"  # Initialize with an empty object
    fi

    # Proper jq command to update the JSON
    jq --arg author "${author}" --arg script "${script}" --arg version "${version}" \
      'if .[${author}] then
         .[${author}] += [{"script": ${script}, "version": ${version}}]
       else
         .[${author}] = [{"script": ${script}, "version": ${version}}]
       end' "${json_file}" > "${json_file}.tmp" && mv "${json_file}.tmp" "${json_file}"

    zrep_msg info "Package '${script}' by '${author}' version ${version} installed successfully."
}

# Function to list installed packages from installed.json
function zrep_list_installed_packages() {
    local installed_json="${config[main_zrep_install_dir]}/installed.json"

    # Check if installed.json exists
    if [[ ! -f "${installed_json}" ]]; then
        zrep_msg debug "No installed packages found."
        return 0
    fi

    # Parse installed.json and list packages
    zrep_msg sub "\nInstalled packages:"

    # Iterate through each author and their packages
    jq -r 'to_entries | .[] | .key as ${author} | .value[] | "\(${author})/\(.script) (\(.version))"' "${installed_json}" | while IFS= read -r package_info; do
        local package_name=$(echo "${package_info}" | cut -d ' ' -f1)  # Extract package name before the version
        local is_active="${colors[white]}(${colors[end]}${colors[bold_red]}Inactive${colors[end]}${colors[white]})${colors[end]}"  # Set default to Inactive

        # Check if the package is active (only modify if active)
        if grep -q "${package_name}" ${config[main_zrep_install_dir]}/.addons; then
            is_active="${colors[white]}(${colors[end]}${colors[bold_green]}Active${colors[end]}${colors[white]})${colors[end]}"
        fi

        zrep_msg info " - ${package_info} ${is_active}"
    done
}

function zrep_list_package() {
    local installed_json="${config[main_zrep_install_dir]}/installed.json"
    local package_names=""

    # Check if installed.json exists
    if [[ ! -f "${installed_json}" ]]; then
        echo "No installed packages found."
        return 0
    fi

    # Parse installed.json and concatenate package names
    jq -r 'to_entries[] | .key as ${author} | .value[] | "\(${author})/\(.script) (\(.version))"' "${installed_json}" | while IFS= read -r package_info; do
        package_names+="${package_info} "
    done

    # Assuming you want to print out the concatenated package names
    if [[ -n "${package_names}" ]]; then
        echo "Installed packages: ${package_names}"
    else
        echo "No packages found."
    fi
}

# Function to load configuration
function zrep_load_config() {

    # Check if jq is available
    if ! command -v jq &> /dev/null; then
        echo "Error: 'jq' is not installed. Please install jq to continue."
        exit 1
    fi

    if [[ -f "${ZREP_CONFIG}" ]]; then
        zini "${ZREP_CONFIG}"
        zrep_fpath ${config[main_zrep_install_dir]}
    else
        if [[ "${1}" == "init" ]]; then
            echo "${ZREP_CONFIG} not found. Proceeding with 'zrep init'..."
            zrep_init
        else
            echo "${ZREP_CONFIG} not found."
            # Ask the user if they want to run 'zrep init'
            read "response?Would you like to run 'zrep init' to set up? (y/n): "
            if [[ "${response}" =~ ^[Yy]$ ]]; then
                zrep_init
            else
                echo "Initialization canceled. Please run 'zrep init' manually to set up."
                exit 1
            fi
        fi
    fi

}

function zrep_remove_package() {
    local package_name="${1}"
    local installed_json="${config[main_zrep_install_dir]}/installed.json"

    # Check if installed.json exists
    if [[ ! -f "${installed_json}" ]]; then
        echo "Error: installed.json not found."
        return 1
    fi

    # Get package information from installed.json
    local package_info
    package_info=$(zrep_parse_installed_json | jq ".[] | select(.author + \"/\" + .script == \"${package_name}\")")

    # Check if the package is installed
    if [[ -z "${package_info}" ]]; then
        echo "Error: Package '${package_name}' is not installed."
        return 1
    fi

    local author=$(echo "${package_info}" | jq -r '.author')
    local script=$(echo "${package_info}" | jq -r '.script')
    local first_letter=$(echo "${author}" | cut -c 1 | tr '[:upper:]' '[:lower:]')
    local package_dir="${config[main_zrep_install_dir]}/${first_letter}/${author}/${script}"

    echo "Package information:"
    echo "${package_info}" | jq .

    # Ask user for confirmation with default response "Y"
    read "REPLY?Are you sure you want to remove this package? (y/n) [Y]: "
    REPLY=${REPLY:-Y}
    echo

    if [[ "${REPLY}" =~ ^[Yy]$ ]]; then
        # Remove the package directory from disk
        if [[ -d "${package_dir}" ]]; then
            rm -rf "${package_dir}"
            echo "Package directory '${package_dir}' removed successfully."
        else
            echo "Warning: Package directory '${package_dir}' not found."
        fi

        # Safely check and remove author and first letter directories if empty
        local author_dir="${config[main_zrep_install_dir]}/${first_letter}/${author}"
        if [[ -d "${author_dir}" && ! "$(ls -A "${author_dir}")" ]]; then
            rmdir "${author_dir}"
            echo "Author directory '${author_dir}' removed successfully."
        fi

        if [[ -d "${config[main_zrep_install_dir]}/${first_letter}" && ! "$(ls -A "${config[main_zrep_install_dir]}/${first_letter}")" ]]; then
            rmdir "${config[main_zrep_install_dir]}/${first_letter}"
            echo "First letter directory '${config[main_zrep_install_dir]}/${first_letter}' removed successfully."
        fi

        # Remove the package from installed.json
        jq "del(.[] | select(.author == \"${author}\" and .script == \"${script}\"))" "${installed_json}" > "${installed_json}.tmp" && mv "${installed_json}.tmp" "${installed_json}"
        echo "Package '${package_name}' removed successfully from installed.json."
    else
        echo "Removal canceled."
    fi
}

# Function to install a package by unzipping it to ${config[main_zrep_install_dir]}
function zrep_install_package() {

    zrep_parse_remote "https://kekepower.com/zrep/packages.json"

    # Construct the download URL
    local dlurl="https://kekepower.com/zrep/download.php?a=${author}&s=${script}&v=${version}"

    # Get the base directory where the package will be installed
    local baseDir="${config[main_zrep_install_dir]}/"
    local tmpDir="${baseDir}/tmp"

    # Create the directory if it doesn't exist
    mkdir -p "${tmpDir}"

    # Download the package zip file
    local zipFile="${tmpDir}/${author}_${package}_${version}.zip"
    curl -s -o "${zipFile}" "${dlurl}"

    # Check if the download was successful
    if [[ $? -ne 0 ]]; then
        echo "Error: Failed to download the package."
        return 1
    fi

    # Unzip the package to the installation directory
    unzip -q "${zipFile}" -d "${baseDir}"

    # Check if the unzip operation was successful
    if [[ $? -ne 0 ]]; then
        echo "Error: Failed to unzip the package."
        return 1
    else
        zrep_update_installed_json "${author}" "${script}" "${version}"
    fi

    # Clean up: Remove the downloaded zip file
    rm "${zipFile}"

}

# Function to parse installed.json
function zrep_parse_installed_json() {

  local installed_json="${config[main_zrep_install_dir]}/installed.json"
  jq -c '.' "${installed_json}"

}

function zrep_parse_package_name() {
    # echo "Looking for package ${1}"
    package_name="${1}"
    installed_json="${config[main_zrep_install_dir]}/installed.json"
    author="${package_name%/*}"
    script="${package_name#*/}"
    first_letter=$(echo "${author}" | cut -c 1 | tr '[:upper:]' '[:lower:]')
    addon_path="${config[main_zrep_install_dir]}/${first_letter}/${author}/${script}"

    # Check if the package is installed
    if [[ ! -f "${installed_json}" ]] || ! jq -e --arg author "${author}" --arg script "${script}" '.[${author}] | any(.script == ${script})' "${installed_json}" &>/dev/null; then
        echo "Error: Package '${package_name}' is not installed."
        return 1
    fi
}

function zrep_enable() {
    local package_name="${1}"
    zrep_parse_package_name "${package_name}"

    # Assuming zrep_parse_package_name sets 'addon_path' correctly
    # and 'package_name' is in 'author/script' format

    # Initialize addons array if .zrep_addons does not exist
    if [ ! -f "${config[main_zrep_install_dir]}/.addons" ]; then
        addons=()
    else
        # Load existing addons from ${config[main_zrep_install_dir]}/.addons
        source "${config[main_zrep_install_dir]}/.addons"
    fi

    # Check if the addon is already enabled
    local addon_exists=0
    for addon in "${addons[@]}"; do
        if [[ "${addon}" == "${addon_path}" ]]; then
            addon_exists=1
            break
        fi
    done

    if ((addon_exists)); then
        echo "Package '${package_name}' is already enabled."
        return 0
    fi

    # Add addon path to the array
    addons+=("${addon_path}")

    # Reconstruct .zrep_addons file with the updated addons array
    {
        echo "addons=("
        for addon in "${addons[@]}"; do
            echo "  '${addon}'"
        done
        echo ")"
    } > "${config[main_zrep_install_dir]}/.addons"

    # Source the updated .zrep_addons to apply changes
    source "${HOME}/.zrep_addons"
    autoload -Uz "${script}"

    zrep_msg info "\nPackage '${package_name}' has been enabled and added to fpath."
    zrep_msg info "You may have to run 'source ~/.zrep_addons' to get access to it."
}

function zrep_disable() {
    local package_name="${1}"
    zrep_parse_package_name "${package_name}"

    # Assuming zrep_parse_package_name sets 'addon_path' correctly
    # and 'package_name' is in 'author/script' format

    # Initialize addons array if .zrep_addons does not exist
    if [ ! -f "${config[main_zrep_install_dir]}/.addons" ]; then
        addons=()
    else
        # Load existing addons from ${config[main_zrep_install_dir]}/.addons
        source "${config[main_zrep_install_dir]}/.addons"
    fi

    # Initialize a new array for addons
    local new_addons=()

    # Flag to check if addon was found and removed
    local found=0

    # Iterate through existing addons
    for addon in "${addons[@]}"; do
        if [[ "${addon}" == "${addon_path}" ]]; then
            found=1
        else
            new_addons+=("${addon}")
        fi
    done

    if ((found == 0)); then
        zrep_msg debug "\nPackage '${package_name}' is not currently enabled."
        return 0
    fi

    # Reconstruct .zrep_addons file with the new addons array
    {
        echo "addons=("
        for addon in "${new_addons[@]}"; do
            echo "  '${addon}'"
        done
        echo ")"
    } > ${config[main_zrep_install_dir]}/.addons

    # Source the updated .zrep_addons to apply changes
    source ${HOME}/.zrep_addons
    unfunction ${script} 2>/dev/null || true

    zrep_msg info "\nPackage '${package_name} (${script})' has been disabled and removed from fpath."
    zrep_msg info "You may have to run 'source ~/.zrep_addons' to remove it from your shell."
}

# Help function to display available options
function zrep_help() {

  zrep_msg sub "\nUsage: zrep <command> [arguments]"
  zrep_msg info "Available commands:"
  zrep_msg info "  init: Initialize zrep"
  zrep_msg info "  install (i) <author/package>: Install a package"
  zrep_msg info "  remove (rm, delete) <author/package>: Remove a package"
  zrep_msg info "  update (u) <author/package>: Update zrep package"
  zrep_msg info "  enable <author/package>: Enable zrep package"
  zrep_msg info "  disable <author/package>: Disable zrep package"
  zrep_msg info "  version: Display zrep version"
  zrep_msg info "  list: List installed packages"
  zrep_msg info "  <author/package> help: Display help for pacakage (if available)"

}

function zrep_read_usage() {
    local package_name="${1}"
    # Parse the package name to extract author and script
    local author="${package_name%/*}"
    local script="${package_name#*/}"
    local first_letter=$(echo "${author}" | cut -c 1 | tr '[:upper:]' '[:lower:]')

    # Construct the path to the USAGE file
    local usage_file="${config[main_zrep_install_dir]}/${first_letter}/${author}/${script}/USAGE"

    # Check if the USAGE file exists
    if [[ -f "${usage_file}" ]]; then
        # Display the content of the USAGE file
        zrep_msg sub "\n${package_name}:"
        local usage_buffer=$(<${usage_file})
        zrep_msg info "${usage_buffer}"
    else
        zrep_msg debug "No USAGE file found for package '${package_name}'."
    fi
}

function main() {

  zrep_main_version_string

    zrep_load_config

    # Check if the second argument is "help" and the first argument is not empty
    if [[ "${2}" == "help" && -n "${1}" ]]; then
        zrep_read_usage "${1}"
        exit
    fi

    # Example command handling structure
    case "${1}" in
        init)
    	    zrep_init
    	    zrep_fpath ${config[main_zrep_install_dir]}
    	    exit
            ;;
        install | i)
            zrep_msg info "Install function here"
            zrep_install_package ${1}
            ;;
        remove | delete | rm)
            # Parse the command argument to extract the package name
            zrep_remove_package_name="${2:-}"
            if [[ -z "${zrep_remove_package_name}" ]]; then
                echo "Usage: zrep remove author/package"
            else
                zrep_remove_package "${zrep_remove_package_name}"
            fi
            ;;
        update | u)
            zrep_msg info "Update function here"
            ;;
        version | -v | --version)
            zrep_version
            ;;
        list)
            zrep_list_installed_packages
            ;;
        help | -h | --help)
            zrep_help
            ;;
        enable)
            zrep_enable ${2}
            source "${HOME}/.zrep_addons"
            ;;
        disable)
            zrep_disable ${2}
            source "${HOME}/.zrep_addons"
            ;;
        *)
            zrep_help
            ;;
    esac
}

# Call main with all passed arguments
main "$@"