read_report_file <- function(report_path) {
  info <- report_path_info(report_path)
  lines <- brio::read_file(report_path)

  sections_raw <- strsplit(lines, "\n\r\n")[[1]]
  sections_raw <- trimws(sections_raw)
  sections_raw <- sections_raw[nzchar(sections_raw)]

  sections <- lapply(sections_raw, read_report_section, info = info)

  purrr::flatten(sections)
}

read_report_section  <- function(section, info) {
  if (!grepl("^[A-Z ]+\n", section)) {
    browser()
    stop("Expected a title at the start of a section")
  }
  title <- snakecase::to_snake_case(sub("\n.+", "", section))

  #remove title
  body <- sub("^[A-Z ]+\n", "", section)
  header <- strsplit(body, "\n")[[1]][[1]]
  # trailing commas should be on the previous line
  body <- gsub("(\\w)\n,", "\\1,", body)
  # remove header
  body <- trimws(sub(header, "", body, fixed = TRUE))
  body <- gsub("([^,]+ )\n([^,]+)", "\\1\\2", body)

  csv <- paste0(header, "\n", body)
  data <- read_csv(I(csv), show_col_types = FALSE, col_types = cols(.default = "c"))

  # browser(expr = title == "cover" && ncol(data) != 16)

  if (nrow(problems(data))) {
    problems <- problems(data)
    problems$file <- report_path
    problems$section <- title
    problems |>
      write_csv(
        here::here("data-raw", "reports", "read-raw-reports-problems.csv"),
        append = TRUE
      )
  }

  if ("SBoE ID" %in% names(data)) {
    names(data)[which("SBoE ID" == names(data))] <- "sboe_id"
  }
  names(data) <- snakecase::to_snake_case(names(data), parsing_option = 3)
  data <- mutate(data, !!!info, .before = 1)
  structure(list(data), names = title)
}

read_reports_by_sboe_id <- function(sboe_id) {
  raw_paths <- fs::dir_ls(
    here::here("data-raw", "reports", sboe_id),
    glob = "*.txt"
  )
  names(raw_paths) <- fs::path_rel(raw_paths, here::here("data-raw", "reports"))

  data <-
    raw_paths |>
    map(read_report_file) |>
    transpose() |>
    map(list_rbind) |>
    map(report_data_set_column_type)
}

report_data_set_column_type <- function(data) {
  maybe_numeric <- c("period", "cycle", "amount", "sum_to_date", "begin_balance", "end_balance")

  data |>
    mutate(
      across(
        c(matches("_date|date_"), -any_of(maybe_numeric)),
        lubridate::mdy
      ),
      across(any_of(maybe_numeric), parse_number)
    )
}

write_reports_by_sboe_id <- function(sboe_id) {
  reports <- read_reports_by_sboe_id(sboe_id)

  base_dir <- here::here("data")
  sboe_id_param <- sprintf("sboe_id=%s", sboe_id)

  return_path <- c()

  for (table in names(reports)) {
    path <- fs::path(base_dir, table, sboe_id_param, "part-0", ext = "parquet")
    dir_create(fs::path_dir(path))

    if (table == "cover") {
      return_path <- path
    }

    arrow::write_parquet(reports[[table]], path)
  }

  return_path
}

report_path_info <- function(report_path) {
  report_path <- fs::path_abs(report_path)
  x <- fs::path_rel(report_path, here::here("data-raw", "reports"))
  x <- fs::path_split(x)[[1]]

  id <- strsplit(x[2], "_")[[1]][1]

  list(
    sboe_id = x[1],
    report_id = as.integer(id)
  )
}