## ----setup, include=FALSE-----------------------------------------------------
is_check_env <- nzchar(Sys.getenv("_R_CHECK_PACKAGE_NAME_"))
.vig_tmp_root <- file.path(tempdir(), "ddesonn-vig-logs")
dir.create(.vig_tmp_root, recursive = TRUE, showWarnings = FALSE)
options(DDESONN_OUTPUT_ROOT = .vig_tmp_root)
Sys.setenv(DDESONN_ARTIFACTS_ROOT = .vig_tmp_root)
knitr::opts_chunk$set(
  echo = FALSE,
  message = FALSE,
  warning = FALSE,
  dpi = 96,
  fig.retina = 1,
  results = "asis",
  cache.path = file.path(.vig_tmp_root, "cache", "")
)

if (!requireNamespace("DDESONN", quietly = TRUE)) {
  stop(
    "DDESONN must be installed to build this vignette. ",
    "Run: install.packages('DDESONN') (or your install flow) then rebuild vignettes.",
    call. = FALSE
  )
}

library(DDESONN)

# ============================================================
# VIGNETTE SAFETY SWITCH (DEFAULT OFF)
# ============================================================
build_artifacts <- FALSE && !is_check_env

.dd_out_root <- file.path(.vig_tmp_root, "DDESONN_vignette_logs")
outD <- file.path(.dd_out_root, "scenarioD_ensemble_temp")

if (isTRUE(build_artifacts)) {
  dir.create(outD, recursive = TRUE, showWarnings = FALSE)
}

# ============================================================
# HTML-only styling
# Wrapped strictly in HTML output guard to avoid pandoc ??? artifacts
# ============================================================
if (knitr::is_html_output()) {
  cat(knitr::asis_output("
<style>
.dd-scroll {
  overflow-x:auto;
  width:100%;
  border:1px solid #e5e7eb;
  padding:12px;
  border-radius:12px;
  margin-bottom:28px;
  background:#ffffff;
}

.dd-scroll table {
  width:100% !important;
  border-collapse: collapse;
}

.dd-scroll th {
  background:#f1f5f9;
  font-weight:700;
  font-size:14px;
  border-bottom:2px solid #cbd5e1;
}

.dd-scroll td, .dd-scroll th {
  padding:8px 10px;
  text-align:left;
  border-bottom:1px solid #e5e7eb;
}

.dd-table-title {
  font-size:22px;
  font-weight:800;
  margin:28px 0 12px 0;
  color:#0f172a;
}

.dd-note {
  margin: 20px 0 28px 0;
  padding: 14px;
  border-left: 5px solid #3b82f6;
  background: #eff6ff;
  border-radius: 10px;
  font-size:14px;
}
</style>
"))
}

# ============================================================
# Helpers
# ============================================================
find_run_dir <- function(output_root, do_ensemble) {
  runs_root <- file.path(
    ddesonn_artifacts_root(output_root),
    if (isTRUE(do_ensemble)) "EnsembleRuns" else "SingleRuns"
  )
  if (!dir.exists(runs_root)) return(NULL)
  dirs <- list.dirs(runs_root, recursive = FALSE, full.names = TRUE)
  if (!length(dirs)) return(NULL)
  dirs[order(file.info(dirs)$mtime, decreasing = TRUE)][1]
}

show_log_table <- function(log_df, title, n_show = 10L, key_cols = character()) {
  if (!knitr::is_html_output()) return(invisible(NULL))

  cat(knitr::asis_output(sprintf(
    "<div class='dd-table-title'>%s</div>", title
  )))

  if (!is.data.frame(log_df) || !NROW(log_df)) {
    cat(knitr::asis_output("<div class='dd-scroll'>(no rows)</div>"))
    return(invisible(NULL))
  }

  df <- utils::head(log_df, n_show)

  if (length(key_cols)) {
    keep <- intersect(key_cols, names(df))
    if (length(keep)) df <- df[, keep, drop = FALSE]
  }

  if ("message" %in% names(df)) {
    df$message <- gsub("[\r\n\t]+", " ", df$message)
  }

  tab <- knitr::kable(df, format = "html", escape = TRUE)
  cat(knitr::asis_output(paste0("<div class='dd-scroll'>", tab, "</div>")))
}

## ----data-prep----------------------------------------------------------------
set.seed(111)

ext_dir <- system.file("extdata", package = "DDESONN")
hf_path <- file.path(ext_dir, "heart_failure_clinical_records.csv")
df <- read.csv(hf_path)

y_all <- matrix(as.integer(df$DEATH_EVENT), ncol = 1)
x_all <- as.matrix(df[, setdiff(names(df), "DEATH_EVENT")])
storage.mode(x_all) <- "double"

n <- nrow(x_all)
idx <- sample.int(n)

n_train <- floor(0.70 * n)
n_valid <- floor(0.15 * n)

i_tr <- idx[1:n_train]
i_va <- idx[(n_train + 1):(n_train + n_valid)]
i_te <- idx[(n_train + n_valid + 1):n]

x_train <- scale(x_all[i_tr, ])
y_train <- y_all[i_tr, ]

x_valid <- scale(x_all[i_va, ])
y_valid <- y_all[i_va, ]

x_test  <- scale(x_all[i_te, ])
y_test  <- y_all[i_te, ]

## ----scenario-d-run-----------------------------------------------------------
res_D <- ddesonn_run(
  x = x_train,
  y = y_train,
  classification_mode = "binary",
  hidden_sizes = c(64, 32),
  seeds = 1L,
  do_ensemble = TRUE,
  num_networks = 2L,
  num_temp_iterations = 2L,
  validation = list(x = x_valid, y = y_valid),
  test = list(x = x_test, y = y_test),
  training_overrides = list(
    init_method = "he",
    optimizer = "adagrad",
    lr = 0.125,
    lambda = 0.00028,
    activation_functions = list(relu, relu, sigmoid),
    dropout_rates = list(0.10),
    loss_type = "CrossEntropy",
    validation_metrics = TRUE,
    num_epochs = 360,
    final_summary_decimals = 6L
  ),
  output_root = if (isTRUE(build_artifacts)) outD else NULL
)

logs_D <- res_D$runs[[1]]$tables

main_cols     <- c("serial","iteration","epoch","phase","metric_name","metric_value","message","timestamp")
movement_cols <- c("serial","iteration","epoch","param_name","from","to","delta","message","timestamp")
change_cols   <- c("serial","iteration","epoch","layer","target","param_name","grad_norm","update_norm","message","timestamp")

## ----scenario-d-display-------------------------------------------------------
show_log_table(logs_D$main_log,     "Scenario D - Main Log",     key_cols = main_cols)
show_log_table(logs_D$movement_log, "Scenario D - Movement Log", key_cols = movement_cols)
show_log_table(logs_D$change_log,   "Scenario D - Change Log",   key_cols = change_cols)

if (knitr::is_html_output()) {
  cat(knitr::asis_output("
<div class='dd-note'>
<b>Note:</b> Tables below are preview-capped for vignette readability.
Full tables remain available in <code>res_D$runs[[1]]$tables</code>.
Artifact writing is <b>OFF</b> by default for CRAN-safety.
</div>
"))
}