local remote_format_file = "%s/blob/%s%s"
local bb_remote_format_file = "%s/src/%s%s"
local forgejo_remote_format_file = "%s/src/%s%s"

local remote_format_branch = "%s/tree/%s"
local bb_remote_format_branch = "%s/branch/%s"
local bb_remote_format_commit = "%s/commits/%s"
local forgejo_remote_format_branch = "%s/src/branch/%s"
local forgejo_remote_format_commit = "%s/commit/%s"

local remote_format_line = "%s#L%s"
local remote_format_lines = "%s#L%s-L%s"
local bb_remote_format_line = "%s#lines-%s"
local bb_remote_format_lines = "%s#lines-%s:%s"

local utils = require("openingh.utils")
local M = {}

function M.setup()
  -- get the current working directory and set the url
  local current_buffer = vim.fn.expand("%:p:h"):gsub("%[", "\\["):gsub("%]", "\\]")
  local repo_url = vim.fn.system("git -C " .. current_buffer .. " config --get remote.origin.url")

  if repo_url:len() == 0 then
    M.is_no_git_origin = true
    vim.g.openingh = false
    return
  end

  local remote = utils.parse_remote(repo_url)
  if remote == nil then
    print("Error parsing remote URL")
    vim.g.openingh = false
    return
  end

  M.repo_url = string.format("http://%s/%s/%s", remote.host, remote.user_or_org, remote.reponame)

  if string.find(M.repo_url, "bitbucket") then
    M.remote = M.remotes.BB
    M.format_file = bb_remote_format_file
    M.format_branch = bb_remote_format_branch
    M.format_commit = bb_remote_format_commit
    M.format_single_line = bb_remote_format_line
    M.format_multiple_lines = bb_remote_format_lines
  elseif string.find(M.repo_url, "forgejo") or string.find(M.repo_url, "gitea") then
    M.remote = M.remotes.FORGEJO
    M.format_file = forgejo_remote_format_file
    M.format_branch = forgejo_remote_format_branch
    M.format_commit = forgejo_remote_format_commit
    M.format_single_line = remote_format_line
    M.format_multiple_lines = remote_format_lines
  else
    M.remote = M.remotes.GH
    M.format_file = remote_format_file
    M.format_branch = remote_format_branch
    M.format_commit = remote_format_branch
    M.format_single_line = remote_format_line
    M.format_multiple_lines = remote_format_lines
  end
end

M.priority = { BRANCH = 1, COMMIT = 2 }
M.remotes = { GH = 1, BB = 2, FORGEJO = 3 }

local function get_current_branch_or_commit_with_priority(priority)
  if priority == M.priority.BRANCH then
    return utils.get_current_branch_or_commit()
  elseif priority == M.priority.COMMIT then
    return utils.get_current_commit_or_branch()
  else
    return utils.get_current_branch_or_commit()
  end
end

function M.get_file_url(
  priority,
  --[[optional]]
  branch,
  --[[optional]]
  range_start,
  --[[optional]]
  range_end
)
  -- make sure to update the current directory
  M.setup()
  if M.is_no_git_origin then
    utils.print_no_remote_message()
    return
  end

  local file_path = utils.get_current_relative_file_path()

  -- if there is no buffer opened
  if file_path == "/" then
    utils.notify("There is no active file to open!", vim.log.levels.ERROR)
    return
  end

  local rev = get_current_branch_or_commit_with_priority(priority)
  if branch ~= nil then
    rev = branch
  end

  local file_page_url = string.format(M.format_file, M.repo_url, rev, file_path)

  if range_start and not range_end then
    file_page_url = string.format(M.format_single_line, file_page_url, range_start)
  end

  if range_start and range_end then
    file_page_url = string.format(M.format_multiple_lines, file_page_url, range_start, range_end)
  end

  return file_page_url
end

function M.get_repo_url(priority)
  -- make sure to update the current directory
  M.setup()
  if M.is_no_git_origin then
    utils.print_no_remote_message()
    return
  end

  local url
  if priority == M.priority.BRANCH then
    url = string.format(M.format_branch, M.repo_url, get_current_branch_or_commit_with_priority(priority))
  else
    url = string.format(M.format_commit, M.repo_url, get_current_branch_or_commit_with_priority(priority))
  end
  return url
end

function M.open_url(url)
  if not utils.open_url(url) then
    utils.notify("Could not open the built URL " .. url, vim.log.levels.ERROR)
  end
end

return M