package robot

import (
	"errors"

	"github.com/gin-gonic/gin"
	"github.com/yaoapp/kun/log"
	robotapi "github.com/yaoapp/yao/agent/robot/api"
	robottypes "github.com/yaoapp/yao/agent/robot/types"
	"github.com/yaoapp/yao/openapi/oauth/authorized"
	"github.com/yaoapp/yao/openapi/response"
)

// InteractRequest - HTTP request for unified robot interaction
type InteractRequest struct {
	ExecutionID string `json:"execution_id,omitempty"`
	TaskID      string `json:"task_id,omitempty"`
	Source      string `json:"source,omitempty"`
	Message     string `json:"message" binding:"required"`
	Action      string `json:"action,omitempty"`
}

// InteractResponse - HTTP response for interaction
type InteractResponse struct {
	ExecutionID string `json:"execution_id,omitempty"`
	Status      string `json:"status"`
	Message     string `json:"message,omitempty"`
	ChatID      string `json:"chat_id,omitempty"`
	Reply       string `json:"reply,omitempty"`
	WaitForMore bool   `json:"wait_for_more,omitempty"`
}

// ReplyRequest - HTTP request for replying to a waiting task
type ReplyRequest struct {
	Message string `json:"message" binding:"required"`
}

// ConfirmRequest - HTTP request for confirming an execution
type ConfirmRequest struct {
	Message string `json:"message,omitempty"`
}

// InteractRobot handles unified robot interaction
// POST /v1/agent/robots/:id/interact
func InteractRobot(c *gin.Context) {
	authInfo := authorized.GetInfo(c)
	if authInfo == nil || (authInfo.Subject == "" && authInfo.UserID == "") {
		errorResp := &response.ErrorResponse{
			Code:             response.ErrInvalidToken.Code,
			ErrorDescription: "Authentication required",
		}
		response.RespondWithError(c, response.StatusUnauthorized, errorResp)
		return
	}
	robotID := c.Param("id")
	if robotID == "" {
		errorResp := &response.ErrorResponse{
			Code:             response.ErrInvalidRequest.Code,
			ErrorDescription: "robot id is required",
		}
		response.RespondWithError(c, response.StatusBadRequest, errorResp)
		return
	}

	var req InteractRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		errorResp := &response.ErrorResponse{
			Code:             response.ErrInvalidRequest.Code,
			ErrorDescription: "Invalid request body: " + err.Error(),
		}
		response.RespondWithError(c, response.StatusBadRequest, errorResp)
		return
	}

	ctx := robottypes.NewContext(c.Request.Context(), authInfo)
	robotResp, err := robotapi.GetRobotResponse(ctx, robotID)
	if err != nil {
		if errors.Is(err, robottypes.ErrRobotNotFound) {
			errorResp := &response.ErrorResponse{
				Code:             response.ErrInvalidRequest.Code,
				ErrorDescription: "Robot not found: " + robotID,
			}
			response.RespondWithError(c, response.StatusNotFound, errorResp)
			return
		}
		errorResp := &response.ErrorResponse{
			Code:             response.ErrServerError.Code,
			ErrorDescription: "Failed to get robot: " + err.Error(),
		}
		response.RespondWithError(c, response.StatusInternalServerError, errorResp)
		return
	}

	if !CanWrite(c, authInfo, robotResp.YaoTeamID, robotResp.YaoCreatedBy) {
		errorResp := &response.ErrorResponse{
			Code:             response.ErrAccessDenied.Code,
			ErrorDescription: "Forbidden: No permission to interact with this robot",
		}
		response.RespondWithError(c, response.StatusForbidden, errorResp)
		return
	}

	apiReq := &robotapi.InteractRequest{
		ExecutionID: req.ExecutionID,
		TaskID:      req.TaskID,
		Source:      robottypes.InteractSource(req.Source),
		Message:     req.Message,
		Action:      req.Action,
	}

	result, err := robotapi.Interact(ctx, robotID, apiReq)
	if err != nil {
		log.Error("Failed to interact with robot %s: %v", robotID, err)
		errorResp := &response.ErrorResponse{
			Code:             response.ErrServerError.Code,
			ErrorDescription: "Failed to interact: " + err.Error(),
		}
		response.RespondWithError(c, response.StatusInternalServerError, errorResp)
		return
	}

	resp := &InteractResponse{
		ExecutionID: result.ExecutionID,
		Status:      result.Status,
		Message:     result.Message,
		ChatID:      result.ChatID,
		Reply:       result.Reply,
		WaitForMore: result.WaitForMore,
	}
	response.RespondWithSuccess(c, response.StatusOK, resp)
}

// ReplyToTask handles replying to a specific waiting task
// POST /v1/agent/robots/:id/executions/:exec_id/tasks/:task_id/reply
func ReplyToTask(c *gin.Context) {
	authInfo := authorized.GetInfo(c)
	if authInfo == nil || (authInfo.Subject == "" && authInfo.UserID == "") {
		errorResp := &response.ErrorResponse{
			Code:             response.ErrInvalidToken.Code,
			ErrorDescription: "Authentication required",
		}
		response.RespondWithError(c, response.StatusUnauthorized, errorResp)
		return
	}
	robotID := c.Param("id")
	execID := c.Param("exec_id")
	taskID := c.Param("task_id")

	if robotID == "" || execID == "" || taskID == "" {
		errorResp := &response.ErrorResponse{
			Code:             response.ErrInvalidRequest.Code,
			ErrorDescription: "robot id, execution id, and task id are required",
		}
		response.RespondWithError(c, response.StatusBadRequest, errorResp)
		return
	}

	var req ReplyRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		errorResp := &response.ErrorResponse{
			Code:             response.ErrInvalidRequest.Code,
			ErrorDescription: "Invalid request body: " + err.Error(),
		}
		response.RespondWithError(c, response.StatusBadRequest, errorResp)
		return
	}

	ctx := robottypes.NewContext(c.Request.Context(), authInfo)
	robotResp, err := robotapi.GetRobotResponse(ctx, robotID)
	if err != nil {
		handleRobotError(c, robotID, err)
		return
	}

	if !CanWrite(c, authInfo, robotResp.YaoTeamID, robotResp.YaoCreatedBy) {
		errorResp := &response.ErrorResponse{
			Code:             response.ErrAccessDenied.Code,
			ErrorDescription: "Forbidden",
		}
		response.RespondWithError(c, response.StatusForbidden, errorResp)
		return
	}

	result, err := robotapi.Reply(ctx, robotID, execID, taskID, req.Message)
	if err != nil {
		log.Error("Failed to reply to task: %v", err)
		errorResp := &response.ErrorResponse{
			Code:             response.ErrServerError.Code,
			ErrorDescription: "Failed to reply: " + err.Error(),
		}
		response.RespondWithError(c, response.StatusInternalServerError, errorResp)
		return
	}

	resp := &InteractResponse{
		ExecutionID: result.ExecutionID,
		Status:      result.Status,
		Message:     result.Message,
	}
	response.RespondWithSuccess(c, response.StatusOK, resp)
}

// ConfirmExecution handles confirming a pending execution
// POST /v1/agent/robots/:id/executions/:exec_id/confirm
func ConfirmExecution(c *gin.Context) {
	authInfo := authorized.GetInfo(c)
	if authInfo == nil || (authInfo.Subject == "" && authInfo.UserID == "") {
		errorResp := &response.ErrorResponse{
			Code:             response.ErrInvalidToken.Code,
			ErrorDescription: "Authentication required",
		}
		response.RespondWithError(c, response.StatusUnauthorized, errorResp)
		return
	}
	robotID := c.Param("id")
	execID := c.Param("exec_id")

	if robotID == "" || execID == "" {
		errorResp := &response.ErrorResponse{
			Code:             response.ErrInvalidRequest.Code,
			ErrorDescription: "robot id and execution id are required",
		}
		response.RespondWithError(c, response.StatusBadRequest, errorResp)
		return
	}

	var req ConfirmRequest
	if err := c.ShouldBindJSON(&req); err != nil {
		// Allow empty body for confirm
		req = ConfirmRequest{}
	}

	ctx := robottypes.NewContext(c.Request.Context(), authInfo)
	robotResp, err := robotapi.GetRobotResponse(ctx, robotID)
	if err != nil {
		handleRobotError(c, robotID, err)
		return
	}

	if !CanWrite(c, authInfo, robotResp.YaoTeamID, robotResp.YaoCreatedBy) {
		errorResp := &response.ErrorResponse{
			Code:             response.ErrAccessDenied.Code,
			ErrorDescription: "Forbidden",
		}
		response.RespondWithError(c, response.StatusForbidden, errorResp)
		return
	}

	result, err := robotapi.Confirm(ctx, robotID, execID, req.Message)
	if err != nil {
		log.Error("Failed to confirm execution: %v", err)
		errorResp := &response.ErrorResponse{
			Code:             response.ErrServerError.Code,
			ErrorDescription: "Failed to confirm: " + err.Error(),
		}
		response.RespondWithError(c, response.StatusInternalServerError, errorResp)
		return
	}

	resp := &InteractResponse{
		ExecutionID: result.ExecutionID,
		Status:      result.Status,
		Message:     result.Message,
	}
	response.RespondWithSuccess(c, response.StatusOK, resp)
}

func handleRobotError(c *gin.Context, robotID string, err error) {
	if errors.Is(err, robottypes.ErrRobotNotFound) {
		errorResp := &response.ErrorResponse{
			Code:             response.ErrInvalidRequest.Code,
			ErrorDescription: "Robot not found: " + robotID,
		}
		response.RespondWithError(c, response.StatusNotFound, errorResp)
		return
	}
	errorResp := &response.ErrorResponse{
		Code:             response.ErrServerError.Code,
		ErrorDescription: "Failed to get robot: " + err.Error(),
	}
	response.RespondWithError(c, response.StatusInternalServerError, errorResp)
}