package dagger

import (
	"context"
	"fmt"
)

// Engine represents a Dagger engine wrapper
type Engine struct {
	ctx    context.Context
	client interface{} // Will be replaced with actual Dagger client when integrated
	closed bool
}

// NewEngine creates a new Dagger engine
func NewEngine(ctx context.Context) (*Engine, error) {
	if ctx == nil {
		return nil, fmt.Errorf("context cannot be nil")
	}

	// TODO: Initialize actual Dagger client here
	// For now, we'll use a placeholder

	return &Engine{
		ctx:    ctx,
		client: nil, // Placeholder
		closed: false,
	}, nil
}

// Container returns a new container builder
func (e *Engine) Container() *ContainerBuilder {
	if e.closed {
		return &ContainerBuilder{
			engine: e,
			err:    fmt.Errorf("engine is closed"),
		}
	}

	return &ContainerBuilder{
		engine:   e,
		image:    "",
		mounts:   make(map[string]string),
		env:      make(map[string]string),
		workdir:  "",
		commands: [][]string{},
	}
}

// Host returns a host directory manager
func (e *Engine) Host() *HostManager {
	return &HostManager{
		engine: e,
	}
}

// Close closes the Dagger engine
func (e *Engine) Close() error {
	if e.closed {
		return nil
	}

	e.closed = true
	// TODO: Close actual Dagger client here

	return nil
}

// IsClosed returns whether the engine is closed
func (e *Engine) IsClosed() bool {
	return e.closed
}

// Context returns the engine's context
func (e *Engine) Context() context.Context {
	return e.ctx
}
