package handlers

import (
	"log"
	"sno/internal/middleware"
	"sno/internal/models"
	"sno/internal/service"
	"strconv"

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

// RewardHandler handles HTTP requests for rewards.
type RewardHandler struct {
	rewardService service.RewardService
}

// NewRewardHandler creates a new instance of a reward handler.
func NewRewardHandler(s service.RewardService) *RewardHandler {
	return &RewardHandler{rewardService: s}
}

// CreateReward handles the request to create a new reward.
// @Summary Create a new reward
// @Description Creates a new reward that users can purchase with stars (admin/operator only)
// @Tags rewards
// @Accept json
// @Produce json
// @Param reward body models.Reward true "Reward object"
// @Success 201 {object} object{success=bool,message=string,data=models.Reward}
// @Failure 400 {object} object{success=bool,message=string}
// @Failure 500 {object} object{success=bool,message=string}
// @Router /api/admin/rewards [post]
// @Security ApiKeyAuth
func (h *RewardHandler) CreateReward(c *fiber.Ctx) error {
	var reward models.Reward
	if err := c.BodyParser(&reward); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(Response{
			Success: false,
			Message: "Cannot parse JSON",
		})
	}

	// TODO: Get CreatedBy from admin auth middleware

	createdReward, err := h.rewardService.CreateReward(c.Context(), &reward)
	if err != nil {
		log.Printf("ERROR: Failed to create reward: %v", err)
		return c.Status(fiber.StatusInternalServerError).JSON(Response{
			Success: false,
			Message: err.Error(),
		})
	}

	return c.Status(fiber.StatusCreated).JSON(Response{
		Success: true,
		Message: "Reward created successfully",
		Data:    createdReward,
	})
}

// GetAllRewards handles the request to get all active rewards.
// @Summary Get all active rewards
// @Description Returns a list of all active rewards available for purchase
// @Tags rewards
// @Accept json
// @Produce json
// @Success 200 {object} object{success=bool,message=string,data=[]models.Reward}
// @Failure 500 {object} object{success=bool,message=string}
// @Router /api/rewards [get]
// @Security ApiKeyAuth
func (h *RewardHandler) GetAllRewards(c *fiber.Ctx) error {
	rewards, err := h.rewardService.ListActiveRewards(c.Context())
	if err != nil {
		log.Printf("ERROR: Failed to list rewards: %v", err)
		return c.Status(fiber.StatusInternalServerError).JSON(Response{
			Success: false,
			Message: "Failed to retrieve rewards",
		})
	}

	return c.Status(fiber.StatusOK).JSON(Response{
		Success: true,
		Message: "Rewards retrieved successfully",
		Data:    rewards,
	})
}

// PurchaseReward handles the request for a user to purchase a reward.
// @Summary Purchase a reward
// @Description Allows a user to purchase a reward using their stars
// @Tags rewards
// @Accept json
// @Produce json
// @Param id path int true "Reward ID"
// @Success 200 {object} object{success=bool,message=string,data=models.Purchase}
// @Failure 400 {object} object{success=bool,message=string}
// @Failure 500 {object} object{success=bool,message=string}
// @Router /api/rewards/{id}/purchase [post]
// @Security ApiKeyAuth
func (h *RewardHandler) PurchaseReward(c *fiber.Ctx) error {
	rewardID, err := strconv.Atoi(c.Params("id"))
	if err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(Response{
			Success: false,
			Message: "Invalid reward ID",
		})
	}

	// Get user data from auth middleware
	userData := middleware.GetTelegramUser(c)
	if userData == nil {
		return c.Status(fiber.StatusUnauthorized).JSON(Response{
			Success: false,
			Message: "User not authenticated",
		})
	}

	purchase, err := h.rewardService.PurchaseReward(c.Context(), userData.ID, rewardID)
	if err != nil {
		log.Printf("ERROR: Failed to purchase reward: %v", err)
		// Potentially return different status codes based on error type
		return c.Status(fiber.StatusInternalServerError).JSON(Response{
			Success: false,
			Message: err.Error(),
		})
	}

	return c.Status(fiber.StatusOK).JSON(Response{
		Success: true,
		Message: "Reward purchased successfully",
		Data:    purchase,
	})
}

// UpdateReward handles the request to update an existing reward.
// @Summary Update a reward
// @Description Updates an existing reward (admin only)
// @Tags rewards
// @Accept json
// @Produce json
// @Param id path int true "Reward ID"
// @Param reward body models.Reward true "Updated reward object"
// @Success 200 {object} object{success=bool,message=string,data=models.Reward}
// @Failure 400 {object} object{success=bool,message=string}
// @Failure 500 {object} object{success=bool,message=string}
// @Router /api/admin/rewards/{id} [put]
// @Security ApiKeyAuth
func (h *RewardHandler) UpdateReward(c *fiber.Ctx) error {
	id, err := strconv.Atoi(c.Params("id"))
	if err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(Response{
			Success: false,
			Message: "Invalid reward ID",
		})
	}

	var reward models.Reward
	if err := c.BodyParser(&reward); err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(Response{
			Success: false,
			Message: "Cannot parse JSON",
		})
	}

	updatedReward, err := h.rewardService.UpdateReward(c.Context(), id, &reward)
	if err != nil {
		log.Printf("ERROR: Failed to update reward: %v", err)
		return c.Status(fiber.StatusInternalServerError).JSON(Response{
			Success: false,
			Message: err.Error(),
		})
	}

	return c.Status(fiber.StatusOK).JSON(Response{
		Success: true,
		Message: "Reward updated successfully",
		Data:    updatedReward,
	})
}

// DeleteReward handles the request to delete a reward.
// @Summary Delete a reward
// @Description Deletes a reward (admin only)
// @Tags rewards
// @Accept json
// @Produce json
// @Param id path int true "Reward ID"
// @Success 200 {object} object{success=bool,message=string}
// @Failure 400 {object} object{success=bool,message=string}
// @Failure 500 {object} object{success=bool,message=string}
// @Router /api/admin/rewards/{id} [delete]
// @Security ApiKeyAuth
func (h *RewardHandler) DeleteReward(c *fiber.Ctx) error {
	id, err := strconv.Atoi(c.Params("id"))
	if err != nil {
		return c.Status(fiber.StatusBadRequest).JSON(Response{
			Success: false,
			Message: "Invalid reward ID",
		})
	}

	err = h.rewardService.DeleteReward(c.Context(), id)
	if err != nil {
		log.Printf("ERROR: Failed to delete reward: %v", err)
		return c.Status(fiber.StatusInternalServerError).JSON(Response{
			Success: false,
			Message: err.Error(),
		})
	}

	return c.Status(fiber.StatusOK).JSON(Response{
		Success: true,
		Message: "Reward deleted successfully",
	})
}