#!/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"

# echo "START: $fpath"

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[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 config_file="$HOME/.zreprc"
    local zshrc_file="$HOME/.zshrc"
    local install_dir

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

        # Write to .zreprc
        echo "[main]" > $config_file
        echo "zrep_install_dir = $install_dir" >> $config_file
    else
        echo "Running zini $config_file"
        zini $config_file
        echo "Setting install_dir"
        install_dir=${config[zrep_install_dir]}
        echo "install_dir=${install_dir}"
    fi

    # Ensure zrep_install_dir exists
    mkdir -p "$install_dir"

    # Update or add fpath in .zshrc, ensuring no duplicate or empty entries
    if ! grep -q "fpath=(.*$install_dir)" "$zshrc_file"; then
        echo "Adding zrep installation directory to fpath in .zshrc..."
        echo "fpath=('$install_dir' \$fpath)" >> "$zshrc_file"
        if ! grep -q "^export fpath" "$zshrc_file"; then
            echo "export fpath" >> "$zshrc_file"
        fi
    else
        echo "zrep installation directory ($install_dir) is already included in fpath."
    fi

    source ${zshrc_file}
    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
    
    # local dlurl="https://kekepower.com/zrep/download.php?a=${author}&s=${script}&v=${version}"
    # echo "zrep_parse_remote: ${dlurl}"

}

# 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[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 "$package_name" ~/.zrep_addons; then
            is_active="${colors[white]}(${colors[end]}${colors[bold_green]}Active${colors[end]}${colors[white]})${colors[end]}"
        fi

        zrep_msg other " - $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
# shellcheck disable=SC2120
function 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=${version}"
    # echo "${dlurl}"
    # exit

    # 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

    # Load existing addons from .zrep_addons
    source ~/.zrep_addons

    # 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 ")"
        echo
        echo 'if [[ -n ${addons[@]} ]]; then'
        echo '    local unique_addons=()'
        echo '    for addon in "${addons[@]}"; do'
        echo '        if [[ ! " ${fpath[@]} " =~ " ${addon} " ]]; then'
        echo '            unique_addons+=("$addon")'
        echo '        fi'
        echo '    done'
        echo '    if [[ ${#unique_addons[@]} -gt 0 ]]; then'
        echo '        fpath=("${unique_addons[@]}" $fpath)'
        echo '    fi'
        echo '    export fpath'
        echo 'else'
        echo '    echo "zrep: No addons enabled."'
        echo 'fi'
    } > ${HOME}/.zrep_addons

    # Source the updated .zrep_addons to apply changes
    source ${HOME}/.zrep_addons

    echo "Package '$package_name' has been enabled and added to fpath."
}

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

    # Load existing addons from .zrep_addons
    source ${HOME}/.zrep_addons

    # 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
        echo "Package '$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 ")"
        echo
        echo 'if [[ -n ${addons[@]} ]]; then'
        echo '    local unique_addons=()'
        echo '    for addon in "${addons[@]}"; do'
        echo '        if [[ ! " ${fpath[@]} " =~ " ${addon} " ]]; then'
        echo '            unique_addons+=("$addon")'
        echo '        fi'
        echo '    done'
        echo '    if [[ ${#unique_addons[@]} -gt 0 ]]; then'
        echo '        fpath=("${unique_addons[@]}" $fpath)'
        echo '    fi'
        echo '    export fpath'
        echo 'else'
        echo '    echo "zrep: No addons enabled."'
        echo 'fi'
    } > ${HOME}/.zrep_addons

    # Source the updated .zrep_addons to apply changes
    source ${HOME}/.zrep_addons

    echo "Package '$package_name' has been disabled and removed from fpath."
}

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

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

}

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 other "$usage_buffer"
    else
        zrep_msg debug "No USAGE file found for package '$package_name'."
    fi
}

function main() {

  zrep_main_version_string

    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 "$zrep_remove_package_name" ]]; then
                echo "Usage: zrep remove package_name"
            else
                zrep_remove_package "$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}
            ;;
        disable)
            zrep_disable ${2}
            ;;
        *)
            zrep_help
            ;;
    esac
}

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