local Util = require("lazy.core.util")

local M = {}

---@class LazyConfig
M.defaults = {
  root = vim.fn.stdpath("data") .. "/lazy", -- directory where plugins will be installed
  defaults = {
    lazy = false, -- should plugins be lazy-loaded?
    version = nil,
    -- version = "*", -- enable this to try installing the latest stable versions of plugins
  },
  lockfile = vim.fn.stdpath("config") .. "/lazy-lock.json", -- lockfile generated after running update.
  concurrency = nil, ---@type number limit the maximum amount of concurrent tasks
  git = {
    -- defaults for the `Lazy log` command
    -- log = { "-10" }, -- show the last 10 commits
    log = { "--since=3 days ago" }, -- show commits from the last 3 days
    timeout = 120, -- kill processes that take more than 2 minutes
    url_format = "https://github.com/%s.git",
  },
  dev = {
    -- directory where you store your local plugin projects
    path = "~/projects",
    ---@type string[] plugins that match these patterns will use your local versions instead of being fetched from GitHub
    patterns = {}, -- For example {"folke"}
  },
  install = {
    -- install missing plugins on startup. This doesn't increase startup time.
    missing = true,
    -- try to load one of these colorschemes when starting an installation during startup
    colorscheme = { "habamax" },
  },
  ui = {
    -- a number <1 is a percentage., >1 is a fixed size
    size = { width = 0.8, height = 0.8 },
    -- The border to use for the UI window. Accepts same border values as |nvim_open_win()|.
    border = "none",
    icons = {
      cmd = " ",
      config = "",
      event = "",
      ft = " ",
      init = " ",
      keys = " ",
      plugin = " ",
      runtime = " ",
      source = " ",
      start = "",
      task = "✔ ",
    },
    throttle = 20, -- how frequently should the ui process render events
  diff = {
    -- diff command <d> can be one of:
    -- * browser: opens the github compare view. Note that this is always mapped to <K> as well,
    --   so you can have a different command for diff <d>
    -- * git: will run git diff and open a buffer with filetype git
    -- * terminal_git: will open a pseudo terminal with git diff
    -- * diffview.nvim: will open Diffview to show the diff
    cmd = "git",
  },
  checker = {
    -- automatically check for plugin updates
    enabled = false,
    concurrency = nil, ---@type number? set to 1 to check for updates very slowly
    notify = true, -- get a notification when new updates are found
    frequency = 3600, -- check for updates every hour
  },
  change_detection = {
    -- automatically check for config file changes and reload the ui
    enabled = true,
    notify = true, -- get a notification when changes are found
  },
  performance = {
    ---@type LazyCacheConfig
    cache = nil,
    reset_packpath = true, -- reset the package path to improve startup time
    rtp = {
      reset = true, -- reset the runtime path to $VIMRUNTIME and your config directory
      ---@type string[]
      paths = {}, -- add any custom paths here that you want to indluce in the rtp
      ---@type string[] list any plugins you want to disable here
      disabled_plugins = {
        -- "gzip",
        -- "matchit",
        -- "matchparen",
        -- "netrwPlugin",
        -- "tarPlugin",
        -- "tohtml",
        -- "tutor",
        -- "zipPlugin",
      },
    },
  },
  -- lazy can generate helptags from the headings in markdown readme files,
  -- so :help works even for plugins that don't have vim docs.
  -- when the readme opens with :help it will be correctly displayed as markdown
  readme = {
    root = vim.fn.stdpath("state") .. "/lazy/readme",
    files = { "README.md" },
    -- only generate markdown helptags for plugins that dont have docs
    skip_if_doc_exists = true,
  },
  debug = false,
}

M.ns = vim.api.nvim_create_namespace("lazy")

---@type string|LazySpec Should be either a string pointing to a module, or a spec
M.spec = nil

---@type table<string, LazyPlugin>
M.plugins = {}

---@type LazyPlugin[]
M.to_clean = {}

---@type LazyConfig
M.options = {}

---@type string
M.me = nil

---@type string
M.mapleader = nil

M.headless = #vim.api.nvim_list_uis() == 0

---@param spec LazySpec
---@param opts? LazyConfig
function M.setup(spec, opts)
  M.spec = spec
  M.options = vim.tbl_deep_extend("force", M.defaults, opts or {})
  M.options.performance.cache = require("lazy.core.cache")
  table.insert(M.options.install.colorscheme, "habamax")

  M.options.root = Util.norm(M.options.root)
  M.options.dev.path = Util.norm(M.options.dev.path)
  M.options.lockfile = Util.norm(M.options.lockfile)
  M.options.readme.root = Util.norm(M.options.readme.root)

  if M.options.performance.reset_packpath then
    vim.go.packpath = ""
  end

  M.me = debug.getinfo(1, "S").source:sub(2)
  M.me = Util.norm(vim.fn.fnamemodify(M.me, ":p:h:h:h:h"))
  if M.options.performance.rtp.reset then
    vim.opt.rtp = {
      M.me,
      vim.env.VIMRUNTIME,
      vim.fn.fnamemodify(vim.v.progpath, ":p:h:h") .. "/lib/nvim",
      vim.fn.stdpath("config"),
      vim.fn.stdpath("config") .. "/after",
    }
  end
  for _, path in ipairs(M.options.performance.rtp.paths) do
    vim.opt.rtp:append(path)
  end
  vim.opt.rtp:append(M.options.readme.root)

  -- disable plugin loading since we do all of that ourselves
  vim.go.loadplugins = false
  M.mapleader = vim.g.mapleader

  if M.headless then
    require("lazy.view.commands").setup()
  else
    vim.api.nvim_create_autocmd("User", {
      pattern = "VeryLazy",
      once = true,
      callback = function()
        require("lazy.core.cache").autosave()
        require("lazy.view.commands").setup()
        if M.options.change_detection.enabled then
          require("lazy.manage.reloader").enable()
        end
        if M.options.checker.enabled then
          vim.defer_fn(function()
            require("lazy.manage.checker").start()
          end, 10)
        end
      end,
    })
  end

  Util.very_lazy()
end

return M