#!/bin/bash
#
# Glintlog Installer
# Usage: curl -fsSL https://raw.githubusercontent.com/ibero-data/glintlog/main/scripts/install.sh | sh
#

set -e

REPO="ibero-data/glintlog"
INSTALL_DIR="/usr/local/bin"
BINARY_NAME="glintlog"

# Colors
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

info() {
    echo -e "${GREEN}[INFO]${NC} $1"
}

warn() {
    echo -e "${YELLOW}[WARN]${NC} $1"
}

error() {
    echo -e "${RED}[ERROR]${NC} $1"
    exit 1
}

# Detect OS and architecture
detect_platform() {
    OS=$(uname -s | tr '[:upper:]' '[:lower:]')
    ARCH=$(uname -m)

    case $ARCH in
        x86_64|amd64)
            ARCH="amd64"
            ;;
        aarch64|arm64)
            ARCH="arm64"
            ;;
        *)
            error "Unsupported architecture: $ARCH"
            ;;
    esac

    case $OS in
        linux)
            OS="linux"
            ;;
        darwin)
            OS="darwin"
            ;;
        *)
            error "Unsupported operating system: $OS"
            ;;
    esac

    PLATFORM="${OS}-${ARCH}"
    info "Detected platform: $PLATFORM"
}

# Get latest version from GitHub
get_latest_version() {
    VERSION=$(curl -fsSL "https://api.github.com/repos/${REPO}/releases/latest" | grep '"tag_name"' | sed -E 's/.*"([^"]+)".*/\1/')
    if [ -z "$VERSION" ]; then
        error "Could not determine latest version"
    fi
    info "Latest version: $VERSION"
}

# Download and install
install() {
    DOWNLOAD_URL="https://github.com/${REPO}/releases/download/${VERSION}/${BINARY_NAME}-${PLATFORM}"

    info "Downloading from: $DOWNLOAD_URL"

    TMP_FILE=$(mktemp)
    if ! curl -fsSL "$DOWNLOAD_URL" -o "$TMP_FILE"; then
        rm -f "$TMP_FILE"
        error "Download failed. Binary for $PLATFORM may not be available."
    fi

    chmod +x "$TMP_FILE"

    # Try to install to /usr/local/bin, fall back to ~/.local/bin
    if [ -w "$INSTALL_DIR" ]; then
        mv "$TMP_FILE" "$INSTALL_DIR/$BINARY_NAME"
        info "Installed to: $INSTALL_DIR/$BINARY_NAME"
    elif command -v sudo &> /dev/null; then
        info "Installing to $INSTALL_DIR (requires sudo)"
        sudo mv "$TMP_FILE" "$INSTALL_DIR/$BINARY_NAME"
        info "Installed to: $INSTALL_DIR/$BINARY_NAME"
    else
        # Fall back to user directory
        INSTALL_DIR="$HOME/.local/bin"
        mkdir -p "$INSTALL_DIR"
        mv "$TMP_FILE" "$INSTALL_DIR/$BINARY_NAME"
        info "Installed to: $INSTALL_DIR/$BINARY_NAME"

        # Check if in PATH
        if [[ ":$PATH:" != *":$INSTALL_DIR:"* ]]; then
            warn "Add $INSTALL_DIR to your PATH:"
            echo "  export PATH=\"\$PATH:$INSTALL_DIR\""
        fi
    fi
}

# Verify installation
verify() {
    if command -v glintlog &> /dev/null; then
        info "Installation successful!"
        echo ""
        glintlog version
        echo ""
        info "Get started:"
        echo "  glintlog start -d    # Start in background"
        echo "  glintlog status      # Check status"
        echo "  glintlog help        # Show all commands"
    else
        warn "Installation complete, but 'glintlog' not found in PATH"
        warn "You may need to restart your shell or add the install directory to PATH"
    fi
}

main() {
    echo ""
    echo "  ┌─────────────────────────────────────┐"
    echo "  │         Glintlog Installer          │"
    echo "  │   Lightweight observability tool    │"
    echo "  └─────────────────────────────────────┘"
    echo ""

    detect_platform
    get_latest_version
    install
    verify

    echo ""
}

main