package http

import (
	"backend/internal/api/dto"
	"backend/internal/usecase"

	"github.com/gofiber/fiber/v2"
)

type AuthHandler struct {
	authService usecase.AuthService
}

func NewAuthHandler(authService *usecase.AuthService) *AuthHandler {
	return &AuthHandler{
		authService: *authService,
	}
}

// GenerateChallenge generates a challenge for authentication
// @Summary Generate authentication challenge
// @Description Generate a challenge message for wallet authentication
// @Tags auth
// @Accept json
// @Produce json
// @Param request body dto.ChallengeRequest true "Challenge Request"
// @Success 200 {object} dto.ChallengeResponse
// @Failure 400 {object} map[string]string
// @Failure 500 {object} map[string]string
// @Router /auth/challenge [post]
func (h *AuthHandler) GenerateChallenge(c *fiber.Ctx) error {
	var req dto.ChallengeRequest
	if err := c.BodyParser(&req); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"error": "invalid request body",
		})
	}
	challenge, err := h.authService.GenerateChallenge(c.Context(), req.PubKey)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"error": err.Error(),
		})
	}
	return c.Status(fiber.StatusOK).JSON(
		dto.ChallengeResponse{
			Message:   challenge.Message,
			TimeStamp: challenge.TimeStamp.String(),
			ExpiresAt: challenge.ExpiresAt.String(),
		},
	)
}

// Authenticate authenticates a user with signed challenge
// @Summary Authenticate user
// @Description Authenticate user with wallet signature
// @Tags auth
// @Accept json
// @Produce json
// @Param request body dto.AuthenticateRequest true "Authentication Request"
// @Success 200 {object} dto.AuthenticateResponse
// @Failure 400 {object} map[string]string
// @Failure 401 {object} map[string]string
// @Router /auth/authenticate [post]
func (h *AuthHandler) Authenticate(c *fiber.Ctx) error {
	var req dto.AuthenticateRequest
	if err := c.BodyParser(&req); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"error": "invalid request body",
		})
	}

	userToken, err := h.authService.Authenticate(
		c.Context(),
		req.PubKey,
		req.Signature,
		//TODO: add chainID to cfg
		1,
		c.IP(),
		c.Get("User-Agent"),
	)
	if err != nil {
		return c.Status(fiber.StatusUnauthorized).JSON(fiber.Map{
			"error": err.Error(),
		})
	}

	return c.Status(fiber.StatusOK).JSON(dto.AuthenticateResponse{
		AuthorizationToken: userToken.AuthorizationToken,
		RefreshToken:       userToken.RefreshToken,
		ExpiresAt:          userToken.ExpiresAt,
	})
}

// SendOTP sends OTP code to the provided phone number
// @Summary Send OTP code
// @Description Send OTP code to the provided phone number
// @Tags auth
// @Accept json
// @Produce json
// @Param request body dto.OTPProviderReq true "OTP Request"
// @Success 200 {object} dto.OTPProviderResponse
// @Failure 400 {object} map[string]string
// @Failure 500 {object} map[string]string
// @Router /auth/otp [post]
func (h *AuthHandler) SendOTP(c *fiber.Ctx) error {
	var req dto.OTPProviderReq
	if err := c.BodyParser(&req); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"error": "invalid request body",
		})
	}

	_, err := h.authService.SendOTPCode(c.Context(), req.Receptor)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"error": err.Error(),
		})
	}

	return c.Status(fiber.StatusOK).JSON(dto.OTPProviderResponse{
		Message: "OTP code sent successfully",
	})
}

// VerifyOTP verifies the OTP code
// @Summary Verify OTP code
// @Description Verify the provided OTP code for the phone number
// @Tags auth
// @Accept json
// @Produce json
// @Param request body dto.OTPVerifyRequest true "OTP Verify Request"
// @Success 200 {object} dto.OTPVerifyResponse
// @Failure 400 {object} map[string]string
// @Failure 401 {object} map[string]string
// @Router /auth/otp [post]
func (h *AuthHandler) VerifyOTP(c *fiber.Ctx) error {
	var req dto.OTPVerifyRequest
	if err := c.BodyParser(&req); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"error": "invalid request body",
		})
	}

	err := h.authService.VerifyOTP(c.Context(), req.Phone, req.Code)
	if err != nil {
		return c.Status(fiber.StatusUnauthorized).JSON(fiber.Map{
			"error": err.Error(),
		})
	}

	return c.Status(fiber.StatusOK).JSON(dto.OTPVerifyResponse{
		Message: "OTP verified successfully",
	})
}

// VerifyKYC verifies user KYC information
// @Summary Verify user KYC
// @Description Verify user KYC with national ID and birth date
// @Tags auth
// @Accept json
// @Produce json
// @Param request body dto.KYCVerifyRequest true "KYC Verify Request"
// @Success 200 {object} dto.KYCVerifyResponse
// @Failure 400 {object} map[string]string
// @Failure 500 {object} map[string]string
// @Router /auth/kyc [post]
func (h *AuthHandler) VerifyKYC(c *fiber.Ctx) error {
	var req dto.KYCVerifyRequest
	if err := c.BodyParser(&req); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
			"error": "invalid request body",
		})
	}

	err := h.authService.VerifyKYC(c.Context(), req.UserID, req.NationalID, req.BirthDate)
	if err != nil {
		return c.Status(fiber.StatusInternalServerError).JSON(fiber.Map{
			"error": err.Error(),
		})
	}

	return c.Status(fiber.StatusOK).JSON(dto.KYCVerifyResponse{
		Message: "KYC verified successfully",
	})
}

func (h *AuthHandler) HelloWorld(c *fiber.Ctx) error {
	return c.Status(fiber.StatusOK).JSON(fiber.Map{
		"message": "Hello, World!",
	})
}