package controller

import (
	"strconv"

	"narasi-ahli-be/app/module/user_agent/request"
	"narasi-ahli-be/app/module/user_agent/response"
	"narasi-ahli-be/app/module/user_agent/service"
	utilRes "narasi-ahli-be/utils/response"

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

type userAgentController struct {
	userAgentService service.UserAgentService
}

type UserAgentController interface {
	UpdateUserAgents(c *fiber.Ctx) error
	GetAgentsByUser(c *fiber.Ctx) error
}


func NewUserAgentController(userAgentService service.UserAgentService) UserAgentController {
	return &userAgentController{userAgentService: userAgentService}
}

type UpdateUserAgentRequest struct {
	UserID   uint   `json:"userId"`
	AgentIDs []uint `json:"agentIds"`
}
// UpdateUserAgents godoc
// @Summary Update agents assigned to user
// @Description Replace all agent mapping for a user
// @Tags User Agent
// @Accept json
// @Produce json
// @Param request body request.UpdateUserAgentRequest true "User Agent Mapping"
// @Success 200 {object} response.UpdateUserAgentResponse
// @Failure 400 {object} response.ErrorResponse
// @Failure 500 {object} response.ErrorResponse
// @Router /user-agent [put]
func (c *userAgentController) UpdateUserAgents(ctx *fiber.Ctx) error {
	var req request.UpdateUserAgentRequest

	if err := ctx.BodyParser(&req); err != nil {
		return ctx.Status(fiber.StatusBadRequest).JSON(response.ErrorResponse{
			Message: "invalid request",
		})
	}

	err := c.userAgentService.UpdateUserAgents(req.UserID, req.AgentID)
	if err != nil {
		return ctx.Status(fiber.StatusInternalServerError).JSON(response.ErrorResponse{
			Message: err.Error(),
		})
	}

	return ctx.JSON(response.UpdateUserAgentResponse{
		Message: "user agents updated",
	})
}

// GetAgentsByUser godoc
// @Summary Get agents by user
// @Description Get all agent IDs assigned to a user
// @Tags User Agent
// @Produce json
// @Param user_id query int true "User ID"
// @Success 200 {object} response.GetUserAgentResponse
// @Failure 400 {object} response.ErrorResponse
// @Failure 500 {object} response.ErrorResponse
// @Router /user-agent [get]
func (c *userAgentController) GetAgentsByUser(ctx *fiber.Ctx) error {

	userIDStr := ctx.Query("user_id")
	userID, err := strconv.Atoi(userIDStr)
	if err != nil || userID == 0 {
		return ctx.Status(fiber.StatusBadRequest).JSON(response.ErrorResponse{
			Message: "user_id required",
		})
	}

	agents, err := c.userAgentService.GetAgentsByUser(uint(userID))
	if err != nil {
		return ctx.Status(fiber.StatusInternalServerError).JSON(response.ErrorResponse{
			Message: err.Error(),
		})
	}

	var agentResponses []response.AgentDetail

	for _, a := range agents {
	agentResponses = append(agentResponses, response.AgentDetail{
		ID:           a.ID,
		AgentID:      a.AgentID,
		Name:         a.Name,
		Description:  a.Description,
		Instructions: a.Instructions,
		Type:         a.Type,
		Status:       a.Status,
		IsActive:     a.IsActive,
		CreatedAt:    a.CreatedAt,
		UpdatedAt:    a.UpdatedAt,
	})
}


	// return ctx.JSON(response.GetUserAgentResponse{
	// UserID: uint(userID),
	// Agents: agentResponses,
	// })
	return utilRes.Resp(ctx, utilRes.Response{
		Success: true,
		Data: response.GetUserAgentResponse{
			UserID: uint(userID),
			Agents: agentResponses,
		},
	})
}