library(plumber)
library(jsonlite)

# Load all the meta-analysis packages (as per your original code)
packages <-  nstall.packages(c("nlme", "lme4", "GLMMadaptive", "glmmML", "glmmTMB", "MCMCglmm", "brms", "mbest", "survival", "CAMAN", "mclust", "flexclust", "aods3", "censReg", "betareg", "VGAM", "gee", "geepack", "glmtoolbox", "mgcv", "devtools", "remotes", "testthat", "covr", "Formula", "mathjaxr", "pander", "knitr", "rmarkdown", "tidyverse", "table1", "tableone"))

for (pkg in packages) {
  suppressWarnings(suppressMessages(library(pkg, character.only = TRUE)))
}

#* @apiTitle Comprehensive Meta-Analysis API

#* Perform meta-analysis using the selected package and function
#* @param package The name of the package to use
#* @param function The name of the function within the package to execute
#* @param params A list containing all necessary parameters for the function
#* @post /analyze
function(package, function, params) {
  # Check if the package is installed
  if (!requireNamespace(package, quietly = TRUE)) {
    res <- list(error = paste("Package", package, "is not installed."))
    return(res)
  }
  
  # Load the package
  suppressWarnings(suppressMessages(library(package, character.only = TRUE)))
  
  # Check if the function exists in the package
  if (!exists(function, where = asNamespace(package), mode = "function")) {
    res <- list(error = paste("Function", function, "does not exist in package", package))
    return(res)
  }
  
  # Convert params from JSON to R objects if necessary
  params <- lapply(params, function(x) {
    if (is.character(x)) {
      # Attempt to parse JSON strings
      parsed <- tryCatch(jsonlite::fromJSON(x), error = function(e) x)
      return(parsed)
    } else {
      return(x)
    }
  })
  
  # Perform the analysis by calling the specified function with the provided params
  result <- tryCatch({
    func <- get(function, envir = asNamespace(package))
    do.call(func, params)
  }, error = function(e) {
    list(error = paste("Error in", package, "function", function, ":", e$message))
  })
  
  return(result)
}

#* @plumber
function(pr) {
  pr$setDebug(TRUE)
}