#!/usr/bin/env bash
#
# blazz installer — curl -fsSL https://blazz.ing/install | bash
#
# Wrapped in main() so a partial download can never execute half a script.

set -euo pipefail

main() {
    local base_url="${BLAZZ_BASE_URL:-https://blazz.ing}"
    local install_dir tmp

    if { [[ -d "$HOME/.local/bin" ]] || mkdir -p "$HOME/.local/bin" 2>/dev/null; } && [[ -w "$HOME/.local/bin" ]]; then
        install_dir="$HOME/.local/bin"
    elif [[ -w /usr/local/bin ]]; then
        install_dir="/usr/local/bin"
    else
        echo "✗ couldn't find a writable install directory (tried ~/.local/bin and /usr/local/bin)" >&2
        echo "  create ~/.local/bin and re-run" >&2
        exit 1
    fi

    tmp="$(mktemp -t blazz-install.XXXXXX)"
    trap 'rm -f "$tmp"' EXIT

    curl -fsSL "$base_url/blazz" -o "$tmp"

    if ! head -n1 "$tmp" | grep -q '^#!'; then
        echo "✗ the downloaded script looks corrupt — try again" >&2
        exit 1
    fi

    chmod +x "$tmp"
    mv "$tmp" "$install_dir/blazz"
    trap - EXIT

    echo "✓ installed blazz to $install_dir/blazz"

    case ":$PATH:" in
        *":$install_dir:"*) ;;
        *)
            echo "  note: $install_dir is not in your PATH — add this to your shell profile:"
            echo "    export PATH=\"$install_dir:\$PATH\""
            ;;
    esac

    echo "  try: blazz ./your-folder"
}

main "$@"