#!/bin/bash

server_bind_read_env_value() {
    local file="$1"
    local key="$2"
    awk -F= -v key="$key" '$1 == key { sub(/^[^=]*=/, ""); print; exit }' "$file" | tr -d '\r'
}

server_bind_write_env_value() {
    local file="$1"
    local key="$2"
    local value="$3"
    local tmp_file
    tmp_file="$(mktemp "${file}.XXXXXX")"
    awk -v key="$key" -v value="$value" '
        BEGIN { replaced = 0 }
        $0 ~ "^" key "=" {
            if (!replaced) {
                print key "=" value
                replaced = 1
            }
            next
        }
        { print }
        END {
            if (!replaced) print key "=" value
        }
    ' "$file" > "$tmp_file"
    chmod --reference="$file" "$tmp_file" 2>/dev/null || true
    mv "$tmp_file" "$file"
}

infer_server_http_bind_ip() {
    local file="$1"
    local public_api_url
    public_api_url="$(server_bind_read_env_value "$file" "NUXT_PUBLIC_BASE_APIURL")"

    case "$public_api_url" in
        /api|/api/*|http://127.0.0.1:*|https://127.0.0.1:*|http://localhost:*|https://localhost:*)
            printf '%s\n' "127.0.0.1"
            ;;
        http://*|https://*)
            printf '%s\n' "0.0.0.0"
            ;;
        *)
            printf '%s\n' "127.0.0.1"
            ;;
    esac
}

init_server_http_bind_ip() {
    local file="${1:-.env}"
    local override="${2:-}"
    local current target

    if [ ! -f "$file" ]; then
        echo "❌ 未找到环境文件: $file" >&2
        return 1
    fi

    current="$(server_bind_read_env_value "$file" "SERVER_HTTP_BIND_IP")"
    target="${override:-$current}"
    if [ -z "$target" ]; then
        target="$(infer_server_http_bind_ip "$file")"
    fi

    case "$target" in
        127.0.0.1|0.0.0.0) ;;
        *)
            echo "❌ SERVER_HTTP_BIND_IP 仅支持 127.0.0.1 或 0.0.0.0，当前为: $target" >&2
            return 1
            ;;
    esac

    if [ "$current" != "$target" ]; then
        server_bind_write_env_value "$file" "SERVER_HTTP_BIND_IP" "$target"
        echo "   ✓ SERVER_HTTP_BIND_IP=$target"
    fi
}

if [ "${BASH_SOURCE[0]}" = "$0" ]; then
    init_server_http_bind_ip "${1:-.env}" "${2:-}"
fi