using Microsoft.AspNetCore.Builder;
using Microsoft.Extensions.DependencyInjection;

namespace MAX.Plugins;

public abstract class PluginBase : IPlugin
{
    public abstract string Id { get; }
    public virtual int Priority => 0;
    protected PluginContext Context { get; private set; } = null!;

    public void ConfigureServices(IServiceCollection services, PluginContext context)
    {
        ArgumentNullException.ThrowIfNull(services);
        ArgumentNullException.ThrowIfNull(context);
        if (!string.Equals(Id, context.Id, StringComparison.Ordinal))
            throw new ArgumentException("插件上下文标识不匹配。", nameof(context));
        if (Context is not null) throw new InvalidOperationException($"插件 {Id} 已注册。");
        Context = context;
        RegisterServices(services);
    }

    public void Configure(IApplicationBuilder app, PluginContext context)
    {
        if (!ReferenceEquals(Context, context))
            throw new InvalidOperationException($"插件 {Id} 尚未注册或上下文不匹配。");
        ConfigureApplication(app);
    }
    protected abstract void RegisterServices(IServiceCollection services);
    protected virtual void ConfigureApplication(IApplicationBuilder app) { }
    protected string RequireConfiguration(string key) => Context.RequireConfiguration(key);
}