package erasure_coding

import (
	"fmt"

	"github.com/seaweedfs/seaweedfs/weed/worker/tasks"
	"github.com/seaweedfs/seaweedfs/weed/worker/types"
)

// Factory creates erasure coding task instances
type Factory struct {
	*tasks.BaseTaskFactory
}

// NewFactory creates a new erasure coding task factory
func NewFactory() *Factory {
	return &Factory{
		BaseTaskFactory: tasks.NewBaseTaskFactory(
			types.TaskTypeErasureCoding,
			[]string{"erasure_coding", "storage", "durability"},
			"Convert volumes to erasure coded format for improved durability",
		),
	}
}

// Create creates a new erasure coding task instance
func (f *Factory) Create(params types.TaskParams) (types.TaskInterface, error) {
	// Validate parameters
	if params.VolumeID == 0 {
		return nil, fmt.Errorf("volume_id is required")
	}
	if params.Server == "" {
		return nil, fmt.Errorf("server is required")
	}

	// Extract additional parameters for comprehensive EC
	masterClient := "localhost:9333"    // Default master client
	workDir := "/tmp/seaweedfs_ec_work" // Default work directory

	if mc, ok := params.Parameters["master_client"].(string); ok && mc != "" {
		masterClient = mc
	}
	if wd, ok := params.Parameters["work_dir"].(string); ok && wd != "" {
		workDir = wd
	}

	// Create EC task with comprehensive capabilities
	task := NewTaskWithParams(params.Server, params.VolumeID, masterClient, workDir)
	task.SetEstimatedDuration(task.EstimateTime(params))

	return task, nil
}