## Install required R packages for ClimateAndMSP project
## Run with: Rscript scripts/install_packages.R

required_pkgs <- c(
  'data.table', 'ggplot2', 'sf', 'raster', 'rgdal', 'rgeos',
  'maptools', 'RColorBrewer', 'beanplot', 'lme4', 'ggsci', 'mapdata', 'maps'
)

installed <- rownames(installed.packages())
to_install <- setdiff(required_pkgs, installed)

if(length(to_install) == 0){
  message('All required packages already installed: ', paste(required_pkgs, collapse=', '))
  quit(status = 0)
}

message('Packages to install: ', paste(to_install, collapse = ', '))

repos <- getOption('repos')
if(is.null(repos) || repos['CRAN']=='@CRAN@') options(repos='https://cloud.r-project.org')

install_success <- list()
for(pkg in to_install){
  message('Installing ', pkg, ' ...')
  tryCatch({
    install.packages(pkg, dependencies = TRUE)
    install_success[[pkg]] <- pkg %in% rownames(installed.packages())
  }, error = function(e){
    message('ERROR installing ', pkg, ': ', conditionMessage(e))
    install_success[[pkg]] <- FALSE
  })
}

message('\nInstallation summary:')
for(nm in names(install_success)){
  message(nm, ': ', ifelse(install_success[[nm]], 'INSTALLED', 'FAILED'))
}

failed <- names(install_success)[vapply(install_success, function(x) !isTRUE(x), logical(1))]
if(length(failed)>0){
  message('\nSome packages failed to install: ', paste(failed, collapse=', '))
  message('Notes: Spatial packages (sf, rgdal, rgeos, raster) may require external system libraries (GDAL, GEOS).')
  quit(status = 2)
} else {
  message('\nAll requested packages installed successfully.')
  quit(status = 0)
}