#!/usr/bin/env bash

set -Eeuo pipefail

BASE_URL='https://sh.decoffee.top'
INSTALL_DIR="${DECOFFEE_INSTALL_DIR:-$HOME/.local/lib/decoffee}"
BIN_DIR="${DECOFFEE_BIN_DIR:-$HOME/.local/bin}"
TMP_DIR="$(mktemp -d)"

cleanup() {
    rm -rf -- "$TMP_DIR"
}
trap cleanup EXIT

for dependency in curl python3 bash install ln; do
    if ! command -v "$dependency" >/dev/null 2>&1; then
        echo "缺少依赖：$dependency" >&2
        exit 1
    fi
done

curl -fsSL --retry 3 --connect-timeout 10 \
    "$BASE_URL/decoffee.sh" -o "$TMP_DIR/decoffee.sh"
curl -fsSL --retry 3 --connect-timeout 10 \
    "$BASE_URL/decoffee_api.py" -o "$TMP_DIR/decoffee_api.py"

head -n 1 "$TMP_DIR/decoffee.sh" | grep -q '^#!/usr/bin/env bash' || {
    echo "decoffee.sh 内容校验失败" >&2
    exit 1
}
head -n 1 "$TMP_DIR/decoffee_api.py" | grep -q '^#!/usr/bin/env python3' || {
    echo "decoffee_api.py 内容校验失败" >&2
    exit 1
}

bash -n "$TMP_DIR/decoffee.sh"
python3 -m py_compile "$TMP_DIR/decoffee_api.py"

mkdir -p "$INSTALL_DIR" "$BIN_DIR"
install -m 0755 "$TMP_DIR/decoffee.sh" "$INSTALL_DIR/decoffee.sh"
install -m 0644 "$TMP_DIR/decoffee_api.py" "$INSTALL_DIR/decoffee_api.py"

if [ -e "$BIN_DIR/decoffee" ] && [ ! -L "$BIN_DIR/decoffee" ]; then
    echo "拒绝覆盖已有文件：$BIN_DIR/decoffee" >&2
    echo "请删除或移动该文件后重试。" >&2
    exit 1
fi
ln -sfn "$INSTALL_DIR/decoffee.sh" "$BIN_DIR/decoffee"

if [[ ":$PATH:" != *":$BIN_DIR:"* ]]; then
    echo "提示：可将 $BIN_DIR 加入 PATH，之后直接运行 decoffee。"
fi

cleanup
trap - EXIT
exec "$INSTALL_DIR/decoffee.sh" "$@"