#!/bin/sh
set -e

BANNER='
         ,,                                               ,,
       `7MM                                             `7MM
         MM                                               MM
 ,p6"bo  MMpMMMb.   ,6"Yb.  `7MMpMMMb.  .P"Ybmmm .gP"Ya   MM  ,pW"Wq.   .P"Ybmmm ,pP"Ybd
6M'"'"'  OO  MM    MM  8)   MM    MM    MM :MI  I8  ,M'"'"'   Yb  MM 6W'"'"'   `Wb :MI  I8   8I   `"
8M       MM    MM   ,pm9MM    MM    MM  WmmmP"  8M""""""  MM 8M     M8  WmmmP"   `YMMMa.
YM.    , MM    MM  8M   MM    MM    MM 8M       YM.    ,  MM YA.   ,A9 8M        L.   I8
 YMbmd'"'"'.JMML  JMML.`Moo9^Yo..JMML  JMML.YMMMMMb  `Mbmmd'"'"'.JMML.`Ybmd9'"'"'  YMMMMMb  M9mmmP'"'"'
                                       6'"'"'     dP                   6'"'"'     dP
                                       Ybmmmd'"'"'                    Ybmmmd'"'"'
'

echo "$BANNER"

REPO="wevm/changelogs-rs"
BINARY="changelogs"
VERSION="${1:-latest}"

detect_os() {
    case "$(uname -s)" in
        Linux*)  echo "linux";;
        Darwin*) echo "darwin";;
        *)       echo "unsupported"; exit 1;;
    esac
}

detect_arch() {
    case "$(uname -m)" in
        x86_64)  echo "amd64";;
        amd64)   echo "amd64";;
        arm64)   echo "arm64";;
        aarch64) echo "arm64";;
        *)       echo "unsupported"; exit 1;;
    esac
}

OS=$(detect_os)
ARCH=$(detect_arch)
ASSET="${BINARY}-${OS}-${ARCH}"

echo "Detected: ${OS}/${ARCH}"
echo "Installing changelogs ${VERSION}..."

if [ "$VERSION" = "latest" ]; then
    URL="https://github.com/${REPO}/releases/download/latest/${ASSET}"
else
    URL="https://github.com/${REPO}/releases/download/${VERSION}/${ASSET}"
fi

INSTALL_DIR="${HOME}/.local/bin"
mkdir -p "$INSTALL_DIR"

echo "Downloading from ${URL}..."
curl -fsSL "$URL" -o "${INSTALL_DIR}/${BINARY}"
chmod +x "${INSTALL_DIR}/${BINARY}"

echo ""
echo "Installed ${BINARY} to ${INSTALL_DIR}/${BINARY}"

if ! echo "$PATH" | grep -q "${INSTALL_DIR}"; then
    SHELL_NAME=$(basename "$SHELL")
    case "$SHELL_NAME" in
        zsh)
            RC_FILE="${ZDOTDIR:-$HOME}/.zshenv"
            PATH_EXPORT='export PATH="$HOME/.local/bin:$PATH"'
            ;;
        bash)
            if [ -f "$HOME/.bash_profile" ]; then
                RC_FILE="$HOME/.bash_profile"
            else
                RC_FILE="$HOME/.bashrc"
            fi
            PATH_EXPORT='export PATH="$HOME/.local/bin:$PATH"'
            ;;
        fish)
            RC_FILE="$HOME/.config/fish/config.fish"
            PATH_EXPORT='fish_add_path $HOME/.local/bin'
            ;;
        sh|dash)
            RC_FILE="$HOME/.profile"
            PATH_EXPORT='export PATH="$HOME/.local/bin:$PATH"'
            ;;
        *)
            RC_FILE=""
            PATH_EXPORT='export PATH="$HOME/.local/bin:$PATH"'
            ;;
    esac

    if [ -n "$RC_FILE" ]; then
        if ! grep -q '.local/bin' "$RC_FILE" 2>/dev/null; then
            mkdir -p "$(dirname "$RC_FILE")"
            echo "" >> "$RC_FILE"
            echo "# Added by changelogs installer" >> "$RC_FILE"
            echo "$PATH_EXPORT" >> "$RC_FILE"
            echo "Added ~/.local/bin to PATH in $RC_FILE"
            echo "Run 'source $RC_FILE' or restart your shell to use changelogs"
        fi
    else
        echo ""
        echo "Add ~/.local/bin to your PATH:"
        echo "  $PATH_EXPORT"
    fi
fi

echo ""
echo "Get started:"
echo "  changelogs init    # Initialize in your project"
echo "  changelogs add     # Create a changelog entry"
echo "  changelogs status  # View pending changes"
echo "  changelogs --help  # See all commands"