package repository

import (
	"context"
	"encoding/json"

	"bugulma/backend/internal/domain"

	"gorm.io/gorm"
)

type SystemSettingsRepository struct {
	db *gorm.DB
}

func NewSystemSettingsRepository(db *gorm.DB) domain.SystemSettingsRepository {
	return &SystemSettingsRepository{db: db}
}

func (r *SystemSettingsRepository) Get(ctx context.Context, key string) (map[string]any, error) {
	var res struct {
		Key   string          `gorm:"column:key"`
		Value json.RawMessage `gorm:"column:value"`
	}
	if err := r.db.WithContext(ctx).Table("system_settings").Where("key = ?", key).Take(&res).Error; err != nil {
		if err == gorm.ErrRecordNotFound {
			return nil, nil
		}
		return nil, err
	}
	var m map[string]any
	if err := json.Unmarshal(res.Value, &m); err != nil {
		return nil, err
	}
	return m, nil
}

func (r *SystemSettingsRepository) Set(ctx context.Context, key string, value map[string]any) error {
	b, err := json.Marshal(value)
	if err != nil {
		return err
	}
	// upsert
	return r.db.WithContext(ctx).Exec(`INSERT INTO system_settings(key, value, updated_at) VALUES(?, ?, now()) ON CONFLICT (key) DO UPDATE SET value = EXCLUDED.value, updated_at = now()`, key, b).Error
}