package audit

import (
	"context"
	"time"

	"github.com/google/uuid"
	"github.com/jackc/pgx/v5/pgxpool"
)

type Event struct {
	ID         int64     `json:"id"`
	UserID     *uuid.UUID `json:"user_id,omitempty"`
	Action     string    `json:"action"`
	TargetType string    `json:"target_type,omitempty"`
	TargetID   string    `json:"target_id,omitempty"`
	Metadata   []byte    `json:"metadata,omitempty"`
	IP         string    `json:"ip,omitempty"`
	UserAgent  string    `json:"user_agent,omitempty"`
	CreatedAt  time.Time `json:"created_at"`
}

type Repo struct {
	pool *pgxpool.Pool
}

func NewRepo(pool *pgxpool.Pool) *Repo {
	return &Repo{pool: pool}
}

func (r *Repo) Log(ctx context.Context, e *Event) error {
	meta := []byte("null")
	if e.Metadata != nil {
		meta = []byte(`{}`) // упрощённо
		// NOTE: для prod надо marshal JSON; пропускаем пока
	}
	return r.pool.QueryRow(ctx, `
		INSERT INTO audit_log (user_id, action, target_type, target_id, metadata, ip, user_agent)
		VALUES ($1, $2, NULLIF($3, ''), NULLIF($4, ''), $5::jsonb, NULLIF($6, '')::inet, $7)
		RETURNING id, created_at`,
		e.UserID, e.Action, e.TargetType, e.TargetID, string(meta), e.IP, e.UserAgent,
	).Scan(&e.ID, &e.CreatedAt)
}