library(ggplot2)
library(dplyr)
library(scales)
library(jsonlite)
library(viridis)
library(tidyr)

args=commandArgs(trailingOnly=TRUE)

# Read the timetable from args[1]
input_file = "input.json"
if (length(args)>0) { input_file = args[1] }
if (length(args)>1) { output = args[2] } else { output = "?" }

# Load the dataset in NDJSON format
dataset = jsonlite::stream_in(file(input_file)) %>%
	jsonlite::flatten()

# We only need the nblocks and time
df = select(dataset, config.cbs, config.rbs,
    ctf_mode.runtime,
    ctf_mode.task,
    ctf_mode.dead,
    config.cpusPerTask,
    time) %>%
	rename(
    cbs=config.cbs,
    rbs=config.rbs,
    runtime=ctf_mode.runtime,
    task=ctf_mode.task,
    dead=ctf_mode.dead,
    cpusPerTask=config.cpusPerTask,
  )

df$cbs = as.factor(df$cbs)
df$rbs = as.factor(df$rbs)

# Normalize the time by the median
df = df %>%
	mutate(runtime = runtime * 1e-9 / cpusPerTask) %>%
	mutate(dead = dead * 1e-9 / cpusPerTask) %>%
	mutate(task = task * 1e-9 / cpusPerTask) %>%
  group_by(cbs, rbs) %>%
	mutate(median.time = median(time)) %>%
	mutate(log.median.time = log(median.time)) %>%
	mutate(median.dead = median(dead)) %>%
	mutate(median.runtime = median(runtime)) %>%
	mutate(median.task = median(task)) %>%
  ungroup() #%>%

print(df)

heatmap_plot = function(df, colname, title) {
  p = ggplot(df, aes(x=cbs, y=rbs, fill=!!ensym(colname))) +
    geom_raster() +
    #scale_fill_gradient(high="black", low="white") +
    scale_fill_viridis(option="plasma") +
    coord_fixed() +
    theme_bw() +
    theme(axis.text.x=element_text(angle = -45, hjust = 0)) +
    theme(plot.subtitle=element_text(size=8)) +
    #guides(fill = guide_colorbar(barwidth=15, title.position="top")) +
    guides(fill = guide_colorbar(barwidth=12, title.vjust=0.8)) +
    labs(x="cbs", y="rbs",
      title=sprintf("Heat granularity: %s", title), 
      subtitle=output) +
    theme(legend.position="bottom")

  k=1
  ggsave(sprintf("%s.png", colname), plot=p, width=4.8*k, height=5*k, dpi=300)
  ggsave(sprintf("%s.pdf", colname), plot=p, width=4.8*k, height=5*k, dpi=300)
}

heatmap_plot(df, "median.runtime", "runtime")
heatmap_plot(df, "median.dead", "not used")
heatmap_plot(df, "median.task", "task")

cutlevel = 0.5
# To plot the median.time we crop the larger values:
df_filtered = filter(df, between(median.time,
  median(time) - (cutlevel * sd(time)),
  median(time) + (cutlevel * sd(time))))

heatmap_plot(df, "median.time", "execution time (seconds)")
heatmap_plot(df, "log.median.time", "execution time")

df_square = filter(df, cbs == rbs) %>%
  gather(key = time.from, value = acc.time, 
    c("median.dead", "median.runtime", "median.task"))

# Colors similar to Paraver
colors <- c("median.dead" = "gray",
  "median.runtime" = "blue",
  "median.task" = "red")

p = ggplot(df_square, aes(x=cbs, y=acc.time)) +
  geom_area(aes(fill=time.from, group=time.from)) +
  scale_fill_manual(values = colors) +
  geom_point(aes(y=median.time, color="black")) +
  geom_line(aes(y=median.time, group=0, color="black")) +
  theme_bw() +
  theme(legend.position=c(0.5, 0.7)) +
  scale_color_identity(breaks = c("black"),
    labels = c("Total time"), guide = "legend") +
  labs(x="Blocksize (side)", y="Time (s)",
    fill="Estimated", color="Direct measurement",
    title="Heat granularity: time distribution", subtitle=output)

ggsave("area.time.png", plot=p, width=6, height=6, dpi=300)
ggsave("area.time.pdf", plot=p, width=6, height=6, dpi=300)

p = ggplot(df_square, aes(x=cbs, y=acc.time)) +
  geom_col(aes(fill=time.from, group=time.from)) +
  scale_fill_manual(values = colors) +
  theme_bw() +
  theme(legend.position=c(0.5, 0.7)) +
  labs(x="Blocksize (side)", y="Time (s)",
    fill="Estimated", color="Direct measurement",
    title="Heat granularity: time distribution", subtitle=output)

ggsave("col.time.png", plot=p, width=6, height=6, dpi=300)
ggsave("col.time.pdf", plot=p, width=6, height=6, dpi=300)