// Package handler provides HTTP handlers for various endpoints.
package handler

import (
	"modelRT/constants"
	"modelRT/database"
	"modelRT/logger"
	"modelRT/network"

	"github.com/gin-gonic/gin"
	"github.com/gofrs/uuid"
	"gorm.io/gorm"
)

// AsyncTaskResultDetailHandler handles detailed query of a single async task result
// @Summary 查询异步任务详情
// @Description 根据任务ID查询异步任务的详细状态和结果
// @Tags AsyncTask
// @Accept json
// @Produce json
// @Param task_id path string true "任务ID"
// @Success 200 {object} network.SuccessResponse{payload=network.AsyncTaskResult} "查询成功"
// @Failure 200 {object} network.FailureResponse "请求参数错误"
// @Router /task/async/{task_id} [get]
func AsyncTaskResultDetailHandler(c *gin.Context) {
	ctx := c.Request.Context()

	taskIDStr := c.Param("task_id")
	if taskIDStr == "" {
		logger.Error(ctx, "task_id parameter is required")
		renderRespFailure(c, constants.RespCodeInvalidParams, "task_id parameter is required", nil)
		return
	}

	taskID, err := uuid.FromString(taskIDStr)
	if err != nil {
		logger.Error(ctx, "invalid task ID format", "task_id", taskIDStr, "error", err)
		renderRespFailure(c, constants.RespCodeInvalidParams, "invalid task ID format", nil)
		return
	}

	pgClient := database.GetPostgresDBClient()
	if pgClient == nil {
		logger.Error(ctx, "database connection not found in context")
		renderRespFailure(c, constants.RespCodeServerError, "database connection error", nil)
		return
	}

	asyncTask, err := database.GetAsyncTaskByID(ctx, pgClient, taskID)
	if err != nil {
		if err == gorm.ErrRecordNotFound {
			logger.Error(ctx, "async task not found", "task_id", taskID)
			renderRespFailure(c, constants.RespCodeInvalidParams, "task not found", nil)
			return
		}
		logger.Error(ctx, "failed to query async task from database", "error", err)
		renderRespFailure(c, constants.RespCodeServerError, "failed to query task", nil)
		return
	}

	taskResult, err := database.GetAsyncTaskResult(ctx, pgClient, taskID)
	if err != nil {
		logger.Error(ctx, "failed to query async task result from database", "error", err)
		renderRespFailure(c, constants.RespCodeServerError, "failed to query task result", nil)
		return
	}

	responseTask := network.AsyncTaskResult{
		TaskID:     asyncTask.TaskID,
		TaskType:   string(asyncTask.TaskType),
		Status:     string(asyncTask.Status),
		CreatedAt:  asyncTask.CreatedAt,
		FinishedAt: asyncTask.FinishedAt,
		Progress:   asyncTask.Progress,
	}

	if taskResult != nil {
		if taskResult.Result != nil {
			responseTask.Result = map[string]any(taskResult.Result)
		}
		if taskResult.ErrorCode != nil {
			responseTask.ErrorCode = taskResult.ErrorCode
		}
		if taskResult.ErrorMessage != nil {
			responseTask.ErrorMessage = taskResult.ErrorMessage
		}
		if taskResult.ErrorDetail != nil {
			responseTask.ErrorDetail = map[string]any(taskResult.ErrorDetail)
		}
	}

	renderRespSuccess(c, constants.RespCodeSuccess, "query completed", responseTask)
}