package sync

import (
	"fmt"
	"regexp"

	"gorm.io/gorm"
	"rhemawavetech.com/rhemawave/internal/db"
	"rhemawavetech.com/rhemawave/internal/logger"
	"rhemawavetech.com/rhemawave/internal/netreq"
)

var htmlRegex = regexp.MustCompile(`<[^>]*>`)

// SyncProclamations fetches data from the API, cleans it, and updates the local DB.
// It returns the slice of proclamations so the UI can update immediately.
func SyncProclamations(apiURL string, database *gorm.DB) ([]db.Proclamation, error) {
	fullURL := fmt.Sprintf("%s/proclamations", apiURL)

	// 1. Fetch from API
	proclamations, err := netreq.GetJSON[db.Proclamation](fullURL)
	if err != nil {
		// If we're offline or API is down, we log it but don't crash.
		// The UI can still use whatever is currently in the DB.
		logger.Error("Proclamation sync failed, skipping update: %v", err)
		return nil, err
	}

	// 2. Data Transformation (Cleaning)
	for i := range proclamations {
		proclamations[i].Content = htmlRegex.ReplaceAllString(proclamations[i].Content, "")
	}

	// 3. Persist to Database
	// Using Transaction ensures we don't end up with partial data if something fails
	err = database.Transaction(func(tx *gorm.DB) error {
		if err := tx.Omit("selected").Save(&proclamations).Error; err != nil {
			return err
		}
		return nil
	})

	if err != nil {
		logger.Error("Failed to save synced proclamations: %v", err)
		return nil, err
	}

	logger.Info("Successfully synced proclamations:  %d", len(proclamations))
	return proclamations, nil
}

func SyncCategories(apiURL string, database *gorm.DB) ([]db.ProclamationCategory, error) {
	fullURL := fmt.Sprintf("%s/categories", apiURL)
	categories, err := netreq.GetJSON[db.ProclamationCategory](fullURL)
	if err != nil {
		logger.Error("Category sync failed, skipping update: %v", err)
		return nil, err
	}
	err = database.Transaction(func(tx *gorm.DB) error {
		if err := tx.Save(&categories).Error; err != nil {
			return err
		}
		return nil
	})
	logger.Info("Successfully synced proclamation categories: %d", len(categories))
	return categories, nil
}