library(tidyverse)
library(tidyquant)
library(timetk)

#iShares Global Financials ETF (IXG) Stock Price
df_ixg <- 
  tq_get("IXG") %>% 
  select(date, ixg = close)


#2016 term
df_ixg_2016 <- 
  df_ixg %>% 
  filter(date >= as.Date("2016-10-29"),
         date <= as.Date("2016-12-08")) %>% 
  mutate(ixg = round(ixg / subset(., date=="2016-11-08")[["ixg"]] * 100),
         symbol = "2016") %>% 
  mutate(
    days_from_election = as.integer(date - as.Date("2016-11-08")),
    t_label = ifelse(
      days_from_election == 0,
      "t",
      ifelse(
        days_from_election > 0,
        paste0("t+", days_from_election),
        paste0("t", days_from_election)
      )
    )
  ) %>% 
  select(t_label, symbol, ixg) %>% 
  mutate(t_label = factor(t_label, levels = .$t_label))


#2024 term
df_ixg_2024 <- 
  df_ixg %>% 
  filter(date >= as.Date("2024-10-26"),
         date <= as.Date("2024-11-13")) %>% 
  mutate(ixg = round(ixg / subset(., date=="2024-11-05")[["ixg"]] * 100),
         symbol = "2024") %>% 
  mutate(
    days_from_election = as.integer(date - as.Date("2024-11-05")),
    t_label = ifelse(
      days_from_election == 0,
      "t",
      ifelse(
        days_from_election > 0,
        paste0("t+", days_from_election),
        paste0("t", days_from_election)
      )
    )
  ) %>% 
  select(t_label, symbol, ixg) %>% 
  mutate(t_label = factor(t_label, levels = .$t_label))

#Merging the datasets
df_merged <- 
  bind_rows(
    df_ixg_2024,
    df_ixg_2016
  )


#Plot
df_merged %>% 
  ggplot(aes(t_label, ixg, col = symbol)) +
  geom_line(linewidth = 1.5, aes(group = symbol)) +
  ggrepel::geom_text_repel(
    data = . %>% slice_tail(n = 1, by = symbol),
    aes(label = ixg),
    hjust = 1, 
    vjust = 1,
    nudge_x = 0.5,
    size = 8,
    fontface = "bold", 
    family = "Roboto Slab"
  ) +
  scale_color_manual(
    values = c("2024" ="darkorange","2016"  = "navyblue")
  ) +
  scale_x_discrete(expand = expansion(mult = c(.1, .1)),
                   breaks = c(as.factor("t-8"),
                              as.factor("t"),
                              as.factor("t+8"),
                              as.factor("t+30"))) +
  geom_vline(xintercept = "t", 
             size = 1.5, 
             linetype= "dashed", 
             color = "red") +
  labs(
    x = element_blank(), 
    y = element_blank(),
    subtitle = "<span style = 'color:red;'>US Election Date</span><br>Daily Index: (t = 100)",
    title = "iShares Global Financials ETF<br><span style = 'color:darkorange;'>2024</span> vs. <span style = 'color:navyblue'>2016</span>"
  ) +
  theme_minimal(
    base_family = "Roboto Slab"
  ) +
  theme(
    panel.grid = element_blank(),
    panel.grid.major.x = element_line(linetype = "dashed", color = "gray"),
    panel.grid.major.y = element_line(linetype = "dashed", color = "gray"),
    plot.subtitle = ggtext::element_markdown(face = "bold",size = 18),
    plot.title = ggtext::element_markdown(face = "bold", size = 20),
    axis.text = element_text(face = "bold", size = 18),
    plot.background = element_rect(fill = "azure", color = "azure"),
    legend.position = "none"
  )