package client_recovery

import (
	"encoding/base64"
	"errors"
	"gitea.pena/PenaSide/codeword/internal/models"
	"gitea.pena/PenaSide/codeword/internal/repository"
	"gitea.pena/PenaSide/codeword/internal/services"
	"github.com/gofiber/fiber/v2"
	"go.uber.org/zap"
	"gitea.pena/PenaSide/common/log_mw"
	"time"
  "strings"
)

type Deps struct {
	Logger      *zap.Logger
	Service     *services.RecoveryService
	DefaultURL  string
	RecoveryURL string
}

type RecoveryController struct {
	logger      *zap.Logger
	service     *services.RecoveryService
	defaultURL  string
	recoveryURL string
}

func NewRecoveryController(deps Deps) *RecoveryController {
	return &RecoveryController{
		logger:      deps.Logger,
		service:     deps.Service,
		defaultURL:  deps.DefaultURL,
		recoveryURL: deps.RecoveryURL,
	}
}

func (r *RecoveryController) HandleRecoveryRequest(c *fiber.Ctx) error {
	hlogger := log_mw.ExtractLogger(c)
	var req models.RecoveryRequest
	if err := c.BodyParser(&req); err != nil {
		r.logger.Error("Failed to parse recovery request", zap.Error(err))
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "Bad Request"})
	}

	if req.Email == "" {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{"error": "email is required"})
	}

	referralURL := c.Get("Referrer")

	if req.RedirectionURL == "" && referralURL != "" {
		req.RedirectionURL = referralURL
	} else if req.RedirectionURL == "" {
		req.RedirectionURL = r.defaultURL
	}

	user, err := r.service.FindUserByEmail(c.Context(), req.Email)
	if err != nil || user == nil {
		r.logger.Error("Failed to find user by email", zap.Error(err))
		return c.Status(fiber.StatusNotFound).JSON(fiber.Map{"error": "User not found"})
	}

	key, err := r.service.GenerateKey()
	if err != nil {
		r.logger.Error("Failed to generate key", zap.Error(err))
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "Internal Server Error"})
	}

	signUrl := referralURL + req.RedirectionURL
	sign := base64.URLEncoding.EncodeToString(key)

	id, err := r.service.StoreRecoveryRecord(c.Context(), models.StoreRecDeps{
		UserID: user.ID.Hex(),
		Email:  user.Email,
		Key:    sign,
		Url:    signUrl,
	})
	if err != nil {
		r.logger.Error("Failed to store recovery record", zap.Error(err))
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "Internal Server Error"})
	}

	signWithID := sign + id // подпись с id записи

	err = r.service.RecoveryEmailTask(c.Context(), models.RecEmailDeps{UserID: user.ID.Hex(), Email: req.Email, SignWithID: strings.Replace(signUrl, "/changepwd","",1) + "/"+signWithID, ID: id})
	if err != nil {
		r.logger.Error("Failed to send recovery email", zap.Error(err))

		if errors.Is(err, repository.ErrAlreadyReported) {
			return c.Status(fiber.StatusAlreadyReported).JSON(fiber.Map{"error": "already reported"})
		}

		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "Internal Server Error"})
	}

	hlogger.Emit(models.InfoPasswordRestorationRequested{
		CtxID:        id,
		CtxUserID:    user.ID.Hex(),
		CtxReturnURL: r.recoveryURL + signWithID,
		CtxEmail:     req.Email,
	})

	return c.Status(fiber.StatusOK).JSON(fiber.Map{"message": "Recovery email sent successfully"})
}

func (r *RecoveryController) HandleRecoveryLink(c *fiber.Ctx) error {
	hlogger := log_mw.ExtractLogger(c)
	sign := c.Params("sign")

	record, err := r.service.GetRecoveryRecord(c.Context(), sign)
	if err != nil {
		r.logger.Error("Recovery link expired", zap.String("signature", sign))
		return c.Redirect("https://hub.pena.digital/recover/expired")
	}

	if time.Since(record.CreatedAt) > 15*time.Minute {
		r.logger.Error("Recovery link expired", zap.String("signature", sign))
		return c.Redirect(record.SignUrl + "/expired")
	}

	tokens, err := r.service.ExchangeForTokens(record.UserID, record.Sign)
	if err != nil {
		r.logger.Error("Failed to exchange recovery link for tokens", zap.Error(err))
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{"error": "Internal Server Error"})
	}
	c.Cookie(&fiber.Cookie{
		Name:     "refreshToken",
		Value:    tokens["refreshToken"],
		Domain:   ".pena.digital",
		Expires:  time.Now().Add(30 * 24 * time.Hour),
		Secure:   true,
		HTTPOnly: true,
	})

	c.Cookie(&fiber.Cookie{
		Name:     "refreshToken",
		Value:    tokens["refreshToken"],
		Domain:   ".pena.digital",
		Expires:  time.Now().Add(30 * 24 * time.Hour),
		Secure:   true,
		HTTPOnly: true,
	})

	hlogger.Emit(models.InfoPasswordRestored{
		CtxID:     record.ID.String(),
		CtxUserID: record.UserID,
	})

	return c.Redirect(record.SignUrl + "?auth=" + tokens["accessToken"])
}