---
title: "NFL Draft Weight Exploration"
author: "Alex Bresler"
output:
  flexdashboard::flex_dashboard:
    theme: flatly
    social: menu
    dev: svg
    source_code: embed
    self_contained: FALSE
    lib_dir: lib

---

```{r setup, include=FALSE}
library(flexdashboard)
library(readr)
library(dplyr)
library(ggplot2)  # devtools::install_github("hadley/ggplot2")
library(hrbrmisc) # devtools::install_github("hrbrmstr/hrbrmisc") -- to use theme_hrbrmstr_my() you need Myriad Fonts Installed
library(viridis)
library(magrittr)
library(stringr)

all_nfl_draft_weights <-
  'https://gist.githubusercontent.com/abresler/a679be59d94b1925f9eb7ee0d4448525/raw/48dc8d38a831f0e7d52c7b3031101665fb08e848/all_nfl_weight_data.csv' %>%
  read_csv() %>%
  mutate(decade = (year.draft %/% 10 ) * 10)

summary_by_pos <-
  all_nfl_draft_weights %>%
  dplyr::rename(year = year.draft) %>%
  group_by(year, type.pos, decade) %>%
  summarise_each_(funs(mean(., na.rm = T), median(., na.rm = T), min(., na.rm = T), max(., na.rm = T), length), vars = 'weight.lbs') %>%
  dplyr::rename(count = length) %>%
  dplyr::select(decade, everything()) %>%
  ungroup

get_hrbstyle_nfl_draft_plot <-
  function(position_group = "Quarterback") {
plot_data <-
  summary_by_pos %>%
  dplyr::filter(type.pos %in% position_group)

all_pos_data <-
  all_nfl_draft_weights %>% dplyr::rename(year = year.draft) %>%
  dplyr::filter(!weight.lbs %>% is.na) %>% dplyr::filter(type.pos %in% position_group)

plot <-
  plot_data %>%
  ggplot() +
  geom_segment(aes(
    x = year,
    xend = year,
    y = min,
    yend = max,
    color = year
  ),
  size = 0.2) +
  geom_jitter(
    data = all_pos_data,
    aes(x = year, y = weight.lbs),
    color = "white",
    shape = ".",
    size = 0.1,
    alpha = .55
  ) +
  scale_x_continuous(name = "Draft Year", expand = c(0, 0.5),
                     ) +
  scale_y_continuous(
    name = 'Weight in lbs.',
  ) +
  scale_color_viridis(option = "C") +
  facet_wrap( ~ decade, nrow = 1, scales = "free_x") +
  labs(title = paste0(paste0(position_group, collapse = ' '), ' Draft Weights') %>% stringr::str_trim(),
         "NFL Offensive Lineman Draft Weights",
       subtitle = "Upper: Heaviest Player, Lower: Lighest Player, White Dot: Player's Weight",
       caption = "Pro-football Reference (www.pro-football-reference.com)\nSource code available at gist.github.com/abresler") +
  theme_hrbrmstr_my(grid = "XY") +
  theme(panel.background = element_rect(fill = "black", color = "#2b2b2b", size =
                                          0.15)) +
  theme(panel.margin = margin(0, 0, 0, 0)) +
  theme(panel.grid.major.y = element_line(color = "#b2182b", size =
                                            0.25)) +
  theme(strip.text = element_text(hjust = 0.5)) +
  theme(axis.title.x = element_text(hjust = 0, margin = margin(t = -10))) +
  theme(axis.text.x = element_blank()) +
  theme(axis.text.y = element_text(size = 12, color = "#b2182b")) +
  theme(legend.position = "none") +
  theme(plot.margin = margin(10, 10, 10, 10)) +
  theme(plot.caption = element_text(margin = margin(t = -6)))

return(plot)
}

```

Offense
=====================================================================

Column {.tabset}
-------------------------------------

### OL

```{r}
get_hrbstyle_nfl_draft_plot(position_group = "Offensive Line")
```


### QB

```{r}
get_hrbstyle_nfl_draft_plot(position_group = "Quarterback")
```

### WR

```{r}
get_hrbstyle_nfl_draft_plot(position_group = "Recieiver")
```

### TE

```{r}
get_hrbstyle_nfl_draft_plot(position_group = "Tight End")
```

### RB

```{r}
get_hrbstyle_nfl_draft_plot(position_group = "Running Back")
```

### FB

```{r}
get_hrbstyle_nfl_draft_plot(position_group = "Fullback")
```

Defense
=====================================================================

Column {.tabset}
-------------------------------------

### DL

```{r}
get_hrbstyle_nfl_draft_plot(position_group = "Defensive Line")
```


### LB

```{r}
get_hrbstyle_nfl_draft_plot(position_group = "Linebacker")
```

### S/CB

```{r}
get_hrbstyle_nfl_draft_plot(position_group = "Secondary")
```

Special Teams
=====================================================================

Column {.tabset}
-------------------------------------

### K

```{r}
get_hrbstyle_nfl_draft_plot(position_group = "Kicker")
```


### P

```{r}
get_hrbstyle_nfl_draft_plot(position_group = "Punter")
```