package db

import (
	"bytes"
	"database/sql"
	"encoding/json"
	"fmt"
	"log"
	"net/http"
	"time"
)

func (d *Database) NotifyClient(username string, commandID int, notifType, message string) error {
	// Sauvegarder la notification dans Redis
	notifKey := fmt.Sprintf("notifications:%s", username)

	notification := map[string]interface{}{
		"command_id": commandID,
		"type":       notifType,
		"message":    message,
		"created_at": time.Now().Format(time.RFC3339),
		"read":       false,
	}

	notifJSON, _ := json.Marshal(notification)
	Redis.LPush(RedisCtx, notifKey, notifJSON)
	Redis.Expire(RedisCtx, notifKey, 7*24*time.Hour)

	// Envoyer push notification si le client a un token enregistré
	pushToken, err := d.GetClientPushToken(username)
	if err == nil && pushToken != "" {
		go sendExpoPush(pushToken, "Uber Stup", message, commandID, notifType)
	}

	log.Printf("📬 Notification envoyée à %s: %s", username, message)
	return nil
}

func sendExpoPush(token, title, body string, commandID int, notifType string) {
	sendExpoPushWithChannel(token, title, body, commandID, notifType, "orders")
}

func sendExpoPushWithChannel(token, title, body string, commandID int, notifType, channelID string) {
	payload := map[string]interface{}{
		"to":        token,
		"title":     title,
		"body":      body,
		"channelId": channelID,
		"data": map[string]interface{}{
			"command_id": commandID,
			"type":       notifType,
		},
		"sound": "default",
	}

	jsonBody, err := json.Marshal(payload)
	if err != nil {
		log.Printf("❌ [EXPO_PUSH] Erreur marshal: %v", err)
		return
	}

	req, err := http.NewRequest("POST", "https://exp.host/--/api/v2/push/send", bytes.NewBuffer(jsonBody))
	if err != nil {
		log.Printf("❌ [EXPO_PUSH] Erreur création requête: %v", err)
		return
	}
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Accept", "application/json")
	req.Header.Set("Accept-Encoding", "gzip, deflate")

	client := &http.Client{Timeout: 10 * time.Second}
	resp, err := client.Do(req)
	if err != nil {
		log.Printf("❌ [EXPO_PUSH] Erreur envoi: %v", err)
		return
	}
	defer resp.Body.Close()

	log.Printf("✅ [EXPO_PUSH] Push envoyé à %s (channel: %s, status: %d)", token, channelID, resp.StatusCode)
}

// ============================================
// PUSH TOKEN - LIVREURS (table users)
// ============================================

// SaveUserPushToken sauvegarde le token push d'un livreur dans la table users
func (d *Database) SaveUserPushToken(username, token string) error {
	_, err := d.Exec(`UPDATE users SET push_token = $1 WHERE username = $2`, token, username)
	return err
}

// GetUserPushToken récupère le token push d'un livreur depuis la table users
func (d *Database) GetUserPushToken(username string) (string, error) {
	var token sql.NullString
	err := d.QueryRow(`SELECT push_token FROM users WHERE username = $1`, username).Scan(&token)
	if err != nil || !token.Valid {
		return "", err
	}
	return token.String, nil
}

// DeleteUserPushToken supprime le token push d'un livreur
func (d *Database) DeleteUserPushToken(username string) error {
	_, err := d.Exec(`UPDATE users SET push_token = NULL WHERE username = $1`, username)
	return err
}

// NotifyLivreur envoie une notification in-app (Redis) + push Expo à un livreur
func (d *Database) NotifyLivreur(username string, commandID int, notifType, message string) error {
	notifKey := fmt.Sprintf("notifications:%s", username)

	notification := map[string]interface{}{
		"command_id": commandID,
		"type":       notifType,
		"message":    message,
		"created_at": time.Now().Format(time.RFC3339),
		"read":       false,
	}

	notifJSON, _ := json.Marshal(notification)
	Redis.LPush(RedisCtx, notifKey, notifJSON)
	Redis.Expire(RedisCtx, notifKey, 7*24*time.Hour)

	// Push notification si le livreur a un token enregistré
	pushToken, err := d.GetUserPushToken(username)
	if err == nil && pushToken != "" {
		go sendExpoPushWithChannel(pushToken, "Nouvelle commande assignée", message, commandID, notifType, "deliveries")
	}

	log.Printf("📬 [LIVREUR_NOTIF] Notification envoyée à %s: %s", username, message)
	return nil
}

// NotifyAllAdminCabine stocke une notification Redis pour tous les admins/cabines
// et envoie un push aux ceux qui ont un token. Appelé dès qu'une nouvelle commande est créée.
func (d *Database) NotifyAllAdminCabine(commandID int, clientUsername, deliveryAddr string) {
	rows, err := d.Query(
		`SELECT username, COALESCE(push_token, '') FROM users WHERE role IN ('admin','cabine')`,
	)
	if err != nil {
		log.Printf("❌ [ADMIN_NOTIF] Erreur lecture users admin/cabine: %v", err)
		return
	}
	defer rows.Close()

	msg := fmt.Sprintf("Nouvelle commande #%d de %s — %s", commandID, clientUsername, deliveryAddr)

	notification := map[string]interface{}{
		"command_id": commandID,
		"type":       "new_order",
		"message":    msg,
		"created_at": time.Now().Format(time.RFC3339),
		"read":       false,
	}
	notifJSON, _ := json.Marshal(notification)

	sent := 0
	for rows.Next() {
		var username, token string
		if err := rows.Scan(&username, &token); err != nil {
			continue
		}
		notifKey := fmt.Sprintf("notifications:%s", username)
		Redis.LPush(RedisCtx, notifKey, notifJSON)
		Redis.Expire(RedisCtx, notifKey, 7*24*time.Hour)

		if token != "" {
			go sendExpoPushWithChannel(token, "Nouvelle commande", msg, commandID, "new_order", "orders")
			sent++
		}
	}
	log.Printf("📬 [ADMIN_NOTIF] Notif Redis + push (%d tokens) pour commande #%d", sent, commandID)
}

// NotifyAllAdminCabineAlert envoie une notification Redis + push à tous les admins/cabines
// lors du déclenchement d'une alerte par un livreur.
func (d *Database) NotifyAllAdminCabineAlert(alertID int, livreurUsername, alertMessage string) {
	rows, err := d.Query(
		`SELECT username, COALESCE(push_token, '') FROM users WHERE role IN ('admin','cabine')`,
	)
	if err != nil {
		log.Printf("❌ [ALERT_NOTIF] Erreur lecture users admin/cabine: %v", err)
		return
	}
	defer rows.Close()

	title := "🚨 Alerte livreur"
	body := fmt.Sprintf("%s — livreur : %s", alertMessage, livreurUsername)

	notification := map[string]interface{}{
		"alert_id":   alertID,
		"type":       "alert",
		"message":    body,
		"created_at": time.Now().Format(time.RFC3339),
		"read":       false,
	}
	notifJSON, _ := json.Marshal(notification)

	sent := 0
	for rows.Next() {
		var username, token string
		if err := rows.Scan(&username, &token); err != nil {
			continue
		}
		notifKey := fmt.Sprintf("notifications:%s", username)
		Redis.LPush(RedisCtx, notifKey, notifJSON)
		Redis.Expire(RedisCtx, notifKey, 7*24*time.Hour)

		if token != "" {
			go sendExpoPushWithChannel(token, title, body, alertID, "alert", "orders")
			sent++
		}
	}
	log.Printf("🚨 [ALERT_NOTIF] Notif Redis + push (%d tokens) pour alerte #%d de %s", sent, alertID, livreurUsername)
}

// AddDeliveryRating ajoute une note pour un livreur
func (d *Database) AddDeliveryRating(livreurUsername string, commandID, rating int, comment string) error {
	query := `
		INSERT INTO delivery_ratings (livreur_username, command_id, rating, comment, created_at)
		VALUES (?, ?, ?, ?, NOW())
	`
	_, err := d.Exec(query, livreurUsername, commandID, rating, comment)
	if err != nil {
		log.Printf("⚠️ Erreur sauvegarde note livreur: %v", err)
		return err
	}

	log.Printf("⭐ Note %d/5 ajoutée pour livreur %s (commande %d)", rating, livreurUsername, commandID)
	return nil
}