#!/bin/sh
# DeployHQ CLI installer
# Usage: curl -fsSL https://deployhq.com/install/cli | sh
set -e

REPO="deployhq/deployhq-cli"
BINARY="dhq"

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

case "$ARCH" in
    x86_64|amd64) ARCH="amd64" ;;
    arm64|aarch64) ARCH="arm64" ;;
    *) echo "Unsupported architecture: $ARCH"; exit 1 ;;
esac

case "$OS" in
    linux|darwin) ;;
    mingw*|msys*|cygwin*) OS="windows" ;;
    *) echo "Unsupported OS: $OS"; exit 1 ;;
esac

# Determine install directory
# Priority: explicit env var > existing binary location > writable defaults
if [ -n "$INSTALL_DIR" ]; then
    # Explicit override via env var
    :
elif EXISTING=$(command -v "$BINARY" 2>/dev/null); then
    # Update in place — install where the current binary lives
    INSTALL_DIR=$(dirname "$EXISTING")
elif [ -w "/usr/local/bin" ]; then
    INSTALL_DIR="/usr/local/bin"
elif [ -d "$HOME/.local/bin" ] || mkdir -p "$HOME/.local/bin" 2>/dev/null; then
    INSTALL_DIR="$HOME/.local/bin"
else
    INSTALL_DIR="/usr/local/bin"
fi

# Get latest version
echo "Fetching latest version..."
VERSION=$(curl -fsSL "https://api.github.com/repos/$REPO/releases/latest" | grep '"tag_name"' | sed -E 's/.*"v?([^"]+)".*/\1/')

if [ -z "$VERSION" ]; then
    echo "Error: could not determine latest version"
    exit 1
fi

echo "Installing dhq v$VERSION ($OS/$ARCH)..."

# Download
EXT="tar.gz"
if [ "$OS" = "windows" ]; then
    EXT="zip"
fi

URL="https://github.com/$REPO/releases/download/v$VERSION/${BINARY}_${VERSION}_${OS}_${ARCH}.${EXT}"
TMP=$(mktemp -d)
trap 'rm -rf "$TMP"' EXIT

echo "Downloading $URL..."
curl -fsSL "$URL" -o "$TMP/archive.$EXT"

# Extract
cd "$TMP"
if [ "$EXT" = "zip" ]; then
    unzip -q "archive.$EXT"
else
    tar xzf "archive.$EXT"
fi

# Install
if [ -w "$INSTALL_DIR" ]; then
    mv "$BINARY" "$INSTALL_DIR/$BINARY"
else
    echo "Installing to $INSTALL_DIR (requires sudo)..."
    sudo mv "$BINARY" "$INSTALL_DIR/$BINARY"
fi

chmod +x "$INSTALL_DIR/$BINARY"

echo ""
echo "dhq v$VERSION installed to $INSTALL_DIR/$BINARY"

# Check if install dir is in PATH
case ":$PATH:" in
    *":$INSTALL_DIR:"*) ;;
    *)
        echo ""
        echo "NOTE: $INSTALL_DIR is not in your PATH."
        echo "Add it by running:"
        echo ""
        if [ -f "$HOME/.zshrc" ]; then
            echo "  echo 'export PATH=\"$INSTALL_DIR:\$PATH\"' >> ~/.zshrc && source ~/.zshrc"
        else
            echo "  echo 'export PATH=\"$INSTALL_DIR:\$PATH\"' >> ~/.bashrc && source ~/.bashrc"
        fi
        echo ""
        ;;
esac

echo ""
echo "Get started:"
echo "  dhq hello          (guided onboarding)"
echo "  dhq auth login     (or login directly)"
echo "  dhq --help"