#!/bin/sh

# shmake_library.sh - External library addition for shmake
# Author: Emilia Marigold - 2026

download_library()
{
        check_project_root

        if [ $# -lt 1 ]; then
                printf "Usage: %s library [url]\n" "$SCRIPT_NAME"
                exit 1
        fi

        LIBRARY_URL="$1"
        LIBRARY_DIR="external_code/shared_libraries/source_code"

        printf "Adding library from '%s' to %s...\n" "$LIBRARY_URL" "$LIBRARY_DIR"

        LIBRARY_NAME=$(printf "%s" "$LIBRARY_URL" | sed 's|.*/||' | sed 's|.git$||')

        if [ -d "$LIBRARY_DIR/$LIBRARY_NAME" ]; then
                printf "Warning: '%s' already exists in %s\n" "$LIBRARY_NAME" "$LIBRARY_DIR"
                printf "Overwrite? [y/N]: "
                read -r overwrite

                case "$overwrite" in
                        y|Y)
                                rm -rf "$LIBRARY_DIR/$LIBRARY_NAME"
                                ;;
                        *)
                                printf "Aborted.\n" && exit 0
                                ;;
                esac
        fi

        case "$LIBRARY_URL" in
                *.git)
                        printf "Detected Git repository. Using git clone (shallow)...\n"
                        if command -v git >/dev/null 2>&1; then
                                mkdir -p "$LIBRARY_DIR"
                                git clone "$LIBRARY_URL" "$LIBRARY_DIR/$LIBRARY_NAME"
                                if [ $? -eq 0 ]; then
                                        printf "Library '%s' cloned successfully!\n" "$LIBRARY_NAME"
                                        printf "%s\n" "$LIBRARY_URL" >> "shmake_config/project_external_libraries.config"
                                else
                                        printf "Error: Git clone failed.\n"
                                        exit 1
                                fi
                        else
                                printf "Error: 'git' not found. Please install git.\n"
                                exit 1
                        fi
                ;;
                *)
                        printf "Detected file download. Trying wget/curl...\n"
                        if command -v wget >/dev/null 2>&1; then
                                printf "Using wget...\n"
                                mkdir -p "$LIBRARY_DIR"
                                wget "$LIBRARY_URL" -O "$LIBRARY_DIR/${LIBRARY_NAME}.tar.gz" 2>/dev/null
                                if [ $? -eq 0 ]; then
                                        tar -xzf "$LIBRARY_DIR/${LIBRARY_NAME}.tar.gz" -C "$LIBRARY_DIR" 2>/dev/null
                                        rm "$LIBRARY_DIR/${LIBRARY_NAME}.tar.gz"
                                        printf "Library '%s' downloaded successfully!\n" "$LIBRARY_NAME"
                                        printf "%s\n" "$LIBRARY_URL" >> "shmake_config/project_external_libraries.config"
                                else
                                        printf "Error: wget download failed.\n"
                                        exit 1
                                fi
                        elif command -v curl >/dev/null 2>&1; then
                                printf "Using curl...\n"
                                mkdir -p "$LIBRARY_DIR"
                                curl -L "$LIBRARY_URL" -o "$LIBRARY_DIR/${LIBRARY_NAME}.tar.gz" 2>/dev/null
                                if [ $? -eq 0 ]; then
                                        tar -xzf "$LIBRARY_DIR/${LIBRARY_NAME}.tar.gz" -C "$LIBRARY_DIR" 2>/dev/null
                                        rm "$LIBRARY_DIR/${LIBRARY_NAME}.tar.gz"
                                        printf "Library '%s' downloaded successfully!\n" "$LIBRARY_NAME"
                                        printf "%s\n" "$LIBRARY_URL" >> "shmake_config/project_external_libraries.config"
                                else
                                        printf "Error: curl download failed.\n"
                                        exit 1
                                fi
                        else
                                printf "Error: Neither 'wget' nor 'curl' found. Please install one.\n"
                                exit 1
                        fi
                        ;;
        esac
}