package reporting

import (
	"encoding/json"
	"fmt"
	"os"
	"time"
)

type ProcessReport struct {
	Phase          string     `json:"phase"`
	Status         string     `json:"status"`
	Operation      string     `json:"operation"`
	TranscriptPath string     `json:"transcript_path"`
	GlossaryPath   string     `json:"glossary_path"`
	OutputPath     string     `json:"output_path,omitempty"`
	Modules        []string   `json:"modules"`
	StartedAt      time.Time  `json:"started_at"`
	CompletedAt    *time.Time `json:"completed_at,omitempty"`
	ErrorMessage   string     `json:"error_message,omitempty"`
}

func WriteProcessReport(path string, report ProcessReport) error {
	payload, err := json.MarshalIndent(report, "", "  ")
	if err != nil {
		return fmt.Errorf("failed to marshal process report JSON: %w", err)
	}
	payload = append(payload, '\n')

	if err := os.WriteFile(path, payload, 0o644); err != nil {
		return fmt.Errorf("failed to write report JSON file %q: %w", path, err)
	}
	return nil
}