package handler

import (
	"github.com/gofiber/fiber/v2"
	"github.com/google/uuid"

	"github.com/gosec/gsc-ops-api/internal/middleware"
	"github.com/gosec/gsc-ops-api/internal/service"
	"github.com/gosec/gsc-ops-api/pkg/types"
)

// PersonalAgentHandler handles personal agent config endpoints
type PersonalAgentHandler struct {
	svc *service.PersonalAgentService
}

// NewPersonalAgentHandler creates a new personal agent handler
func NewPersonalAgentHandler(svc *service.PersonalAgentService) *PersonalAgentHandler {
	return &PersonalAgentHandler{svc: svc}
}

// GetMyConfig handles GET /api/v1/agents/me?userId=X&tenantId=Y
func (h *PersonalAgentHandler) GetMyConfig(c *fiber.Ctx) error {
	reqID := middleware.GetRequestID(c)

	userID, err := uuid.Parse(c.Query("userId"))
	if err != nil {
		apiErr := types.NewBadRequest("Invalid or missing userId")
		return c.Status(apiErr.Status).JSON(types.NewErrorResponse(apiErr, reqID))
	}

	tenantID, err := uuid.Parse(c.Query("tenantId"))
	if err != nil {
		apiErr := types.NewBadRequest("Invalid or missing tenantId")
		return c.Status(apiErr.Status).JSON(types.NewErrorResponse(apiErr, reqID))
	}

	config, err := h.svc.GetConfig(c.Context(), userID, tenantID)
	if err != nil {
		apiErr := types.NewNotFound("Personal agent config not found")
		return c.Status(apiErr.Status).JSON(types.NewErrorResponse(apiErr, reqID))
	}

	return c.JSON(types.NewDataResponse(config, reqID))
}

// UpsertMyConfig handles PUT /api/v1/agents/me
func (h *PersonalAgentHandler) UpsertMyConfig(c *fiber.Ctx) error {
	reqID := middleware.GetRequestID(c)

	var req types.UserAgentConfigUpsert
	if err := c.BodyParser(&req); err != nil {
		apiErr := types.NewBadRequest("Invalid request body: " + err.Error())
		return c.Status(apiErr.Status).JSON(types.NewErrorResponse(apiErr, reqID))
	}

	if req.UserID == uuid.Nil || req.TenantID == uuid.Nil {
		apiErr := types.NewValidation("userId and tenantId are required")
		return c.Status(apiErr.Status).JSON(types.NewErrorResponse(apiErr, reqID))
	}

	if len(req.Config) == 0 {
		apiErr := types.NewValidation("config is required")
		return c.Status(apiErr.Status).JSON(types.NewErrorResponse(apiErr, reqID))
	}

	config, err := h.svc.UpsertConfig(c.Context(), &req)
	if err != nil {
		apiErr := types.NewInternal(err.Error())
		return c.Status(apiErr.Status).JSON(types.NewErrorResponse(apiErr, reqID))
	}

	return c.JSON(types.NewDataResponse(config, reqID))
}

// DeleteMyConfig handles DELETE /api/v1/agents/me?userId=X&tenantId=Y
func (h *PersonalAgentHandler) DeleteMyConfig(c *fiber.Ctx) error {
	reqID := middleware.GetRequestID(c)

	userID, err := uuid.Parse(c.Query("userId"))
	if err != nil {
		apiErr := types.NewBadRequest("Invalid or missing userId")
		return c.Status(apiErr.Status).JSON(types.NewErrorResponse(apiErr, reqID))
	}

	tenantID, err := uuid.Parse(c.Query("tenantId"))
	if err != nil {
		apiErr := types.NewBadRequest("Invalid or missing tenantId")
		return c.Status(apiErr.Status).JSON(types.NewErrorResponse(apiErr, reqID))
	}

	if err := h.svc.DeleteConfig(c.Context(), userID, tenantID); err != nil {
		apiErr := types.NewNotFound("Personal agent config not found")
		return c.Status(apiErr.Status).JSON(types.NewErrorResponse(apiErr, reqID))
	}

	return c.SendStatus(fiber.StatusNoContent)
}