#!/usr/bin/env bash
# ─────────────────────────────────────────────────────────────────────────────
# install.sh — Installeur CatrustDB Community (Linux/macOS)
#
# Usage :
#   curl -fsSL https://catrust.eu/releases/install.sh | bash
#   bash <(curl -fsSL https://catrust.eu/releases/install.sh) --version 1.0.0
# ─────────────────────────────────────────────────────────────────────────────
set -euo pipefail

CATRUST_VERSION="${CATRUST_VERSION:-1.0.0}"
CATRUST_BASE_URL="${CATRUST_BASE_URL:-https://catrust.eu/releases}"
INSTALL_DIR="${INSTALL_DIR:-${HOME}/.local/bin}"

# ── Détection de la plateforme ─────────────────────────────────────────────
detect_platform() {
    local os arch
    os="$(uname -s)"
    arch="$(uname -m)"

    case "${os}" in
        Linux)
            case "${arch}" in
                x86_64)  echo "x86_64-linux" ;;
                aarch64) echo "aarch64-linux" ;;
                *)       echo "UNSUPPORTED_ARCH:${arch}" ;;
            esac ;;
        Darwin)
            case "${arch}" in
                x86_64) echo "x86_64-macos" ;;
                arm64)  echo "aarch64-macos" ;;
                *)      echo "UNSUPPORTED_ARCH:${arch}" ;;
            esac ;;
        *)
            echo "UNSUPPORTED_OS:${os}"
            ;;
    esac
}

PLATFORM="$(detect_platform)"
if [[ "${PLATFORM}" == UNSUPPORTED* ]]; then
    echo "❌ Plateforme non supportée : ${PLATFORM}"
    echo "   Voir https://catrust.eu/releases pour les releases disponibles."
    exit 1
fi

TARBALL="catrust-v${CATRUST_VERSION}-${PLATFORM}.tar.gz"
DOWNLOAD_URL="${CATRUST_BASE_URL}/v${CATRUST_VERSION}/${TARBALL}"
CHECKSUM_URL="${CATRUST_BASE_URL}/v${CATRUST_VERSION}/catrust-v${CATRUST_VERSION}-checksums.txt"

echo "┌─────────────────────────────────────────────┐"
echo "│      CatrustDB Community v${CATRUST_VERSION} — Installer │"
echo "└─────────────────────────────────────────────┘"
echo ""
echo "  Plateforme : ${PLATFORM}"
echo "  Version    : ${CATRUST_VERSION}"
echo "  Destination: ${INSTALL_DIR}"
echo ""

# ── Vérification des dépendances ──────────────────────────────────────────
for cmd in curl tar; do
    if ! command -v "${cmd}" &>/dev/null; then
        echo "❌ Dépendance manquante : ${cmd}"
        exit 1
    fi
done

# ── Téléchargement ────────────────────────────────────────────────────────
TMPDIR_INSTALL="$(mktemp -d)"
trap 'rm -rf "${TMPDIR_INSTALL}"' EXIT

echo "[1/4] Téléchargement de ${TARBALL} ..."
curl -fsSL --progress-bar \
    -o "${TMPDIR_INSTALL}/${TARBALL}" \
    "${DOWNLOAD_URL}"

# ── Vérification du checksum ──────────────────────────────────────────────
echo "[2/4] Vérification de l'intégrité (SHA256) ..."
EXPECTED_HASH="$(curl -fsSL "${CHECKSUM_URL}" | grep "${TARBALL}" | awk '{print $1}')"
if [[ -z "${EXPECTED_HASH}" ]]; then
    echo "  ⚠  Checksum introuvable sur le serveur — vérification ignorée"
else
    ACTUAL_HASH="$(sha256sum "${TMPDIR_INSTALL}/${TARBALL}" | awk '{print $1}')"
    if [[ "${ACTUAL_HASH}" != "${EXPECTED_HASH}" ]]; then
        echo "❌ Checksum invalide !"
        echo "   Attendu  : ${EXPECTED_HASH}"
        echo "   Calculé  : ${ACTUAL_HASH}"
        echo "   L'archive est peut-être corrompue ou falsifiée."
        exit 1
    fi
    echo "  ✓ Checksum OK : ${ACTUAL_HASH:0:16}..."
fi

# ── Extraction ────────────────────────────────────────────────────────────
echo "[3/4] Extraction ..."
tar -xzf "${TMPDIR_INSTALL}/${TARBALL}" -C "${TMPDIR_INSTALL}"
PKG_DIR="${TMPDIR_INSTALL}/catrust-v${CATRUST_VERSION}-${PLATFORM}"

# ── Installation ─────────────────────────────────────────────────────────
echo "[4/4] Installation dans ${INSTALL_DIR} ..."
mkdir -p "${INSTALL_DIR}"

for binary in catrust catrustdb-server; do
    if [[ -f "${PKG_DIR}/${binary}" ]]; then
        cp "${PKG_DIR}/${binary}" "${INSTALL_DIR}/${binary}"
        chmod +x "${INSTALL_DIR}/${binary}"
        echo "  ✓ ${binary} installé"
    fi
done

# Shell completions
if command -v bash &>/dev/null; then
    mkdir -p "${HOME}/.bash_completion.d"
    "${INSTALL_DIR}/catrust" completions bash \
        > "${HOME}/.bash_completion.d/catrust" 2>/dev/null || true
fi
if command -v zsh &>/dev/null; then
    mkdir -p "${HOME}/.zsh/completions"
    "${INSTALL_DIR}/catrust" completions zsh \
        > "${HOME}/.zsh/completions/_catrust" 2>/dev/null || true
fi

# ── Vérification finale ──────────────────────────────────────────────────
echo ""
echo "╔══════════════════════════════════════════════╗"
echo "║  ✓ CatrustDB Community v${CATRUST_VERSION} installé !   ║"
echo "╚══════════════════════════════════════════════╝"
echo ""
echo "  Binaires : ${INSTALL_DIR}/catrust"
echo "             ${INSTALL_DIR}/catrustdb-server"
echo ""

# Vérifie que INSTALL_DIR est dans le PATH
if [[ ":${PATH}:" != *":${INSTALL_DIR}:"* ]]; then
    echo "  📌 Ajoutez cette ligne à votre ~/.bashrc ou ~/.zshrc :"
    echo ""
    echo "     export PATH=\"\${HOME}/.local/bin:\${PATH}\""
    echo ""
fi

echo "  Premiers pas :"
echo "    catrust --version"
echo "    catrust init --name mon-projet"
echo "    catrust serve"
echo ""
echo "  Documentation : https://catrust.eu"