Refactor Hook System to Component System with Meta-Annotation Support

[Copilot]

Refactors the hook system to a Spring-inspired component system with meta-annotation support, auto-discovery of post-processors, and proper cycle detection using Tarjan's SCC algorithm.

Renames

• Hook → Component, AbstractHook → AbstractComponent
• @HookMeta → @ComponentMeta, @DependsOnHook → @DependsOnComponent
• @ConditionalOnCustom → @ConditionalOn
• HookService → ComponentService, surfHookApi → surfComponentApi
• Metadata path: META-INF/surf-api/hooks/ → META-INF/surf-api/components/

New Features

Separate @Priority annotation:

@ComponentMeta
@Priority(10)
class MyComponent : AbstractComponent() { ... }

Meta-annotation support — @ComponentMeta on annotation classes enables custom component annotations:

@ComponentMeta
@Priority(100)
annotation class Service

@Service  // Auto-detected as component with priority 100
class MyService : AbstractComponent() { ... }

Auto-discovered post-processors — no annotation required:

class LoggingProcessor : ComponentPostProcessor {
    override val priority = 5
    override suspend fun postProcessAfterInitialization(component, name, ctx) = component.also { log.info("Init: $name") }
}

New conditional annotations:

• @ConditionalOnProperty(key, havingValue, matchIfMissing)
• @ConditionalOnMissingComponent(component)
• @ConditionalOnEnvironment(environments)

Cycle Detection Rewrite

Replaced broken DFS-based cycle detection with Tarjan's SCC algorithm. Detects all cycle types (simple, complex, self-loops) with detailed error messages showing full dependency paths.

Unchanged

PAPI hook files (SurfBukkitPAPIHook, SurfBukkitHookManager) remain in .hook. package — unrelated to component system.

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Original prompt

Refactor Hook System to Component System with Meta-Annotation Support

Overview

Refactor the current hook system to a more general component system inspired by Spring Framework. The system should support meta-annotations (annotations on annotations) and be more flexible.

Core Changes

1. Rename Hook → Component

• Rename Hook interface → Component
• Rename AbstractHook → AbstractComponent
• Rename @HookMeta → @Component
• Rename HookService → ComponentService
• Rename surfHookApi → surfComponentApi
• Rename SurfHookApi → SurfComponentApi
• Update all related classes, files, and directories (e.g., hook/ → component/)

2. Update Lifecycle Methods

Keep the existing lifecycle methods in Component interface:

• bootstrap() - Initial bootstrap phase
• load() - Loading phase
• enable() - Enable phase
• disable() - Disable phase

3. Make @component a Meta-Annotation

Update @Component annotation to be usable on other annotations:

@Target(AnnotationTarget.CLASS, AnnotationTarget.ANNOTATION_CLASS)
@Retention(AnnotationRetention.RUNTIME)
annotation class Component(
    val priority: Short = 0
)

4. Support Meta-Annotations in Processor

Update HookSymbolProcessor → ComponentSymbolProcessor to:

• Recursively scan for @Component annotation on target classes AND their annotations
• If a class has annotation @Service which is annotated with @Component, treat the class as a component
• Collect all annotations from the entire annotation hierarchy
• Merge dependency annotations from meta-annotations

Example meta-annotation support:

@Component
annotation class Service(val priority: Short = 0)

@Component  
@ConditionalOn(FreebuildFeatureEnabledCondition::class)
annotation class FreebuildFeature(
    val name: String,
    val priority: Short = 0
)

// Usage - should be detected as component automatically
@Service
class MyService : AbstractComponent() { ... }

@FreebuildFeature("plots")
class PlotManager : AbstractComponent() { ... }

5. Auto-Discovery of ComponentPostProcessor

Update the processor to automatically discover ComponentPostProcessor implementations:

5.1 Extend PluginComponentMeta

Add post-processor list to metadata:

@Serializable
data class PluginComponentMeta(
    val components: List<Component>,
    val postProcessors: List<PostProcessor> = emptyList()
) {
    @Serializable
    data class Component(
        val priority: Short,
        val className: String,
        val classDependencies: List<String> = emptyList(),
        val pluginDependencies: List<String> = emptyList(),
        val pluginOneDependencies: List<List<String>> = emptyList(),
        val componentDependencies: List<String> = emptyList(),
        val customConditions: List<String> = emptyList(),
    )
    
    @Serializable
    data class PostProcessor(
        val className: String,
        val priority: Int
    )
}

5.2 Scan for ComponentPostProcessor in Symbol Processor

In ComponentSymbolProcessor:

• Scan for all classes implementing ComponentPostProcessor interface
• Extract their priority (from the property or default to 0)
• Add them to PluginComponentMeta.postProcessors list
• No annotation required - just implementing the interface is enough

Example:

class LoggingPostProcessor : ComponentPostProcessor {
    override val priority: Int = 10
    
    override suspend fun postProcessAfterInitialization(
        component: Component,
        componentName: String,
        context: ComponentContext
    ): Component {
        println("Initialized: $componentName")
        return component
    }
}
// ^ This should be automatically discovered and registered

6. Rename and Extend Conditionals

• Rename @ConditionalOnCustom → @ConditionalOn
• Keep existing annotations: @DependsOnClass, @DependsOnClassName, @DependsOnPlugin, @DependsOnOnePlugin, @DependsOnHook → @DependsOnComponent
• Add new conditional annotations (you also add additional conditions which you think are useful):

@Target(AnnotationTarget.CLASS, AnnotationTarget.ANNOTATION_CLASS)
@Retention(AnnotationRetention.RUNTIME)
@Repeatable
annotation class ConditionalOnProperty(
    val key: String,
    val havingValue: String = "",
    val matchIfMissing: Boolean = false
)

@Target(AnnotationTarget.CLASS, AnnotationTarget.ANNOTATION_CLASS)
@Retention(AnnotationRetention.RUNTIME)
@Repeatable
annotation class ConditionalOnMissingComponent(val component: KClass<out Component>)

@Target(AnnotationTarget.CLASS, AnnotationTarget.ANNOTATION_CLASS)
@Retention(AnnotationRetention.RUNTIME)
@Repeatable
annotation class ConditionalOnEnvironment(val environments: Array<String>)

7. Add ComponentPostProcessor Interface

Create new interface for post-processing components after initialization:

package dev.slne.surf.surfapi.shared.api.component.processor

interface ComponentPostProcessor {
    /**
     * Pri...

</details>



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