-- Set <space> as the leader key
-- See `:help mapleader`
--  NOTE: Must happen before plugins are required (otherwise wrong leader will be used)
vim.g.mapleader = ' '
vim.g.maplocalleader = ' '

--import options
require('config.options')

-- Install package manager
--    https://github.com/folke/lazy.nvim
--    `:help lazy.nvim.txt` for more info
local lazypath = vim.fn.stdpath 'data' .. '/lazy/lazy.nvim'
if not vim.loop.fs_stat(lazypath) then
  vim.fn.system {
    'git',
    'clone',
    '--filter=blob:none',
    'https://github.com/folke/lazy.nvim.git',
    '--branch=stable', -- latest stable release
    lazypath,
  }
end
vim.opt.rtp:prepend(lazypath)

local opts = {
  git = { log = { '--since=3 days ago' } },
  ui = { custom_keys = { false } },
  performance = {
    rtp = {
      disabled_plugins = {
        'gzip',
        -- 'netrwPlugin',
        'tarPlugin',
        'tohtml',
        'tutor',
        'zipPlugin',
        'rplugin',
        'editorconfig',
        'matchparen',
        'matchit',
      },
    },
  },
  checker = { enabled = false },
}

-- NOTE: Here is where you install your plugins.
--  You can configure plugins using the `config` key.
--
--  You can also configure plugins after the setup call,
--    as they will be available in your neovim runtime.
require('lazy').setup({
  -- NOTE: First, some plugins that don't require any configuration

  -- Git related plugins
  'tpope/vim-fugitive',
  'tpope/vim-rhubarb',

  -- Detect tabstop and shiftwidth automatically
  'tpope/vim-sleuth',

  -- NOTE: This is where your plugins related to LSP can be installed.
  --  The configuration is done below. Search for lspconfig to find it below.
  {
    -- LSP Configuration & Plugin
    'neovim/nvim-lspconfig',
    dependencies = {
      -- Automatically install LSPs to stdpath for neovim
      { 'williamboman/mason.nvim', config = true },
      'williamboman/mason-lspconfig.nvim',
      'WhoIsSethDaniel/mason-tool-installer.nvim',

      -- Useful status updates for LSP
      -- NOTE: `opts = {}` is the same as calling `require('fidget').setup({})`
      {
        'j-hui/fidget.nvim',
        tag = 'legacy',
        opts = {}
      },

      -- Additional lua configuration, makes nvim stuff amazing!
      'folke/neodev.nvim',
    },
  },

  {
    -- Autocompletion
    'hrsh7th/nvim-cmp',
    dependencies = {
      -- Snippet Engine & its associated nvim-cmp source
      'L3MON4D3/LuaSnip',
      'saadparwaiz1/cmp_luasnip',

      -- Adds LSP completion capabilities
      'hrsh7th/cmp-nvim-lsp',

      -- Adds a number of user-friendly snippets
      'rafamadriz/friendly-snippets',
    },
  },

  -- Useful plugin to show you pending keybinds.
  {
    'folke/which-key.nvim',
    opts = {}
  },
  {
    -- Adds git related signs to the gutter, as well as utilities for managing changes
    'lewis6991/gitsigns.nvim',
    opts = {
      -- See `:help gitsigns.txt`
      signs = {
        add = { text = '+' },
        change = { text = '~' },
        delete = { text = '_' },
        topdelete = { text = '‾' },
        changedelete = { text = '~' },
      },
      on_attach = function(bufnr)
        vim.keymap.set('n', '<leader>hp', require('gitsigns').preview_hunk, { buffer = bufnr, desc = 'Preview git hunk' })

        -- don't override the built-in and fugitive keymaps
        local gs = package.loaded.gitsigns
        vim.keymap.set({ 'n', 'v' }, ']c', function()
          if vim.wo.diff then return ']c' end
          vim.schedule(function() gs.next_hunk() end)
          return '<Ignore>'
        end, { expr = true, buffer = bufnr, desc = "Jump to next hunk" })
        vim.keymap.set({ 'n', 'v' }, '[c', function()
          if vim.wo.diff then return '[c' end
          vim.schedule(function() gs.prev_hunk() end)
          return '<Ignore>'
        end, { expr = true, buffer = bufnr, desc = "Jump to previous hunk" })
      end,
    },
  },

  {
    'tanvirtin/monokai.nvim',
    priority = 1000,
    config = function()
      vim.cmd.colorscheme('monokai')
    end,
  },

  -- {
  -- Theme inspired by Atom
  -- 'navarasu/onedark.nvim',
  -- priority = 1000,
  -- config = function()
  --   vim.cmd.colorscheme 'onedark'
  --   end,
  -- },

  {
    -- Set lualine as statusline
    'nvim-lualine/lualine.nvim',
    -- See `:help lualine.txt`
    opts = {
      options = {
        icons_enabled = false,
        theme = 'onedark',
        component_separators = '|',
        section_separators = '',
      },
    },
  },

  {
    -- Add indentation guides even on blank lines
    'lukas-reineke/indent-blankline.nvim',
    -- Enable `lukas-reineke/indent-blankline.nvim`
    -- See `:help indent_blankline.txt`
    main = "ibl",
    opts = {
      indent = {
        --[[ highlight = highlight ]]
        char = "┆",
        smart_indent_cap = true,
      },
      whitespace = {
        --[[ highlight = highlight, ]]
        remove_blankline_trail = false,
      },
      scope = { enabled = true },
    },
  },

  -- "gc" to comment visual regions/lines
  {
    'numToStr/Comment.nvim',
    opts = {},
    lazy = false
  },

  -- Fuzzy Finder (files, lsp, etc)
  {
    'nvim-telescope/telescope.nvim',
    branch = '0.1.x',
    dependencies = {
      'nvim-lua/plenary.nvim',
      -- Fuzzy Finder Algorithm which requires local dependencies to be built.
      -- Only load if `make` is available. Make sure you have the system
      -- requirements installed.
      {
        'nvim-telescope/telescope-fzf-native.nvim',
        -- NOTE: If you are having trouble with this installation,
        --       refer to the README for telescope-fzf-native for more instructions.
        build = 'make',
        cond = function()
          return vim.fn.executable 'make' == 1
        end,
      },
      'nvim-tree/nvim-web-devicons',
    },
  },

  {
    -- Highlight, edit, and navigate code
    'nvim-treesitter/nvim-treesitter',
    dependencies = {
      'nvim-treesitter/nvim-treesitter-textobjects',
      'windwp/nvim-ts-autotag',
    },
    build = ':TSUpdate',
    -- setup autotag with default options
    opts = {
      enable = true,
    },
  },

  -- NOTE: Next Step on Your Neovim Journey: Add/Configure additional "plugins" for kickstart
  --       These are some example plugins that I've included in the kickstart repository.
  --       Uncomment any of the lines below to enable them.
  -- require 'kickstart.plugins.autoformat',
  -- require 'kickstart.plugins.debug',

  -- NOTE: The import below can automatically add your own plugins, configuration, etc from `lua/custom/plugins/*.lua`
  --    You can use this folder to prevent any conflicts with this init.lua if you're interested in keeping
  --    up-to-date with whatever is in the kickstart repo.
  --    Uncomment the following line and add your plugins to `lua/custom/plugins/*.lua` to get going.
  --
  --    For additional information see: https://github.com/folke/lazy.nvim#-structuring-your-plugins
  { import = 'custom.plugins' },
}, opts)

-- [[ Basic Keymaps ]]

-- Keymaps for better default experience
-- See `:help vim.keymap.set()`
vim.keymap.set({ 'n', 'v' }, '<Space>', '<Nop>', { silent = true })
vim.keymap.set('n', '<leader>pv', vim.cmd.Ex, { desc = "[P]roject [V]iew" })

-- Remap for dealing with word wrap
vim.keymap.set('n', 'k', "v:count == 0 ? 'gk' : 'k'", { expr = true, silent = true })
vim.keymap.set('n', 'j', "v:count == 0 ? 'gj' : 'j'", { expr = true, silent = true })

-- Move lines
vim.keymap.set('v', 'J', ":m '>+1<CR>gv=gv", { silent = true })
vim.keymap.set('v', 'K', ":m '<-2<CR>gv=gv", { silent = true })

vim.keymap.set('n', 'J', "mzj`z")
vim.keymap.set('n', '<C-d>', "<C-d>zz", { desc = "Half Page Jumping Up" })
vim.keymap.set('n', '<C-u>', "<C-u>zz", { desc = "Half Page Jumping Down" })

-- Keep search line in the middle
vim.keymap.set('n', 'n', 'nzzzv', { silent = true })
vim.keymap.set('n', 'N', 'Nzzzv', { silent = true })

-- Quick fix navigation
vim.keymap.set("n", "<C-k>", "<cmd>cnext<CR>zz")
vim.keymap.set("n", "<C-j>", "<cmd>cprev<CR>zz")
vim.keymap.set("n", "<leader>k", "<cmd>lnext<CR>zz", { desc = "Quick Fix Nav Up" })
vim.keymap.set("n", "<leader>j", "<cmd>lprev<CR>zz", { desc = "Quick Fix Nav Down" })

-- Copy from plus register
vim.keymap.set({ 'n', 'v' }, '<leader>y', "\"+y", { desc = "Copy to + register" })
vim.keymap.set('n', '<leader>Y', "\"+Y")

-- Replace current word
vim.keymap.set("n", "<leader>s", [[:%s/\<<C-r><C-w>\>/<C-r><C-w>/gI<Left><Left><Left>]],
  { desc = "[S]ubstitute Current Word" })
vim.keymap.set("n", "<leader>x", "<cmd>!chmod +x %<CR>", { desc = "Set Current File to Executable", silent = true })

-- [[ Highlight on yank ]]
-- See `:help vim.highlight.on_yank()`
local highlight_group = vim.api.nvim_create_augroup('YankHighlight', { clear = true })
vim.api.nvim_create_autocmd('TextYankPost', {
  callback = function()
    vim.highlight.on_yank()
  end,
  group = highlight_group,
  pattern = '*',
})

-- [[ Configure Telescope ]]
-- See `:help telescope` and `:help telescope.setup()`
require('telescope').setup {
  defaults = {
    mappings = {
      i = {
        ['<C-u>'] = false,
        ['<C-d>'] = false,
      },
    },
  },
}

-- Enable telescope fzf native, if installed
pcall(require('telescope').load_extension, 'fzf')

-- See `:help telescope.builtin`
vim.keymap.set('n', '<leader>?', require('telescope.builtin').oldfiles, { desc = '[?] Find recently opened files' })
vim.keymap.set('n', '<leader><space>', require('telescope.builtin').buffers, { desc = '[ ] Find existing buffers' })
vim.keymap.set('n', '<leader>/', function()
  -- You can pass additional configuration to telescope to change theme, layout, etc.
  require('telescope.builtin').current_buffer_fuzzy_find(require('telescope.themes').get_dropdown {
    winblend = 10,
    previewer = false,
  })
end, { desc = '[/] Fuzzily search in current buffer' })

vim.keymap.set('n', '<leader>gf', require('telescope.builtin').git_files, { desc = 'Search [G]it [F]iles' })
vim.keymap.set('n', '<leader>sf', require('telescope.builtin').find_files, { desc = '[S]earch [F]iles' })
vim.keymap.set('n', '<leader>sh', require('telescope.builtin').help_tags, { desc = '[S]earch [H]elp' })
vim.keymap.set('n', '<leader>sw', require('telescope.builtin').grep_string, { desc = '[S]earch current [W]ord' })
vim.keymap.set('n', '<leader>sp', function()
  require('telescope.builtin').grep_string({ search = vim.fn.input("Grep Search > ") })
end, { desc = '[S]search [P]roject' })
vim.keymap.set('n', '<leader>sg', require('telescope.builtin').live_grep, { desc = '[S]earch by [G]rep' })
vim.keymap.set('n', '<leader>sd', require('telescope.builtin').diagnostics, { desc = '[S]earch [D]iagnostics' })
vim.keymap.set('n', '<leader>sr', require('telescope.builtin').resume, { desc = '[S]earch [R]resume' })

-- [[ Configure Treesitter ]]
-- See `:help nvim-treesitter`
require('nvim-treesitter.configs').setup {
  -- Add languages to be installed here that you want installed for treesitter
  ensure_installed = { 'c', 'cpp', 'lua', 'python', 'go', 'vimdoc', 'vim' },

  -- Autoinstall languages that are not installed. Defaults to false (but you can change for yourself!)
  auto_install = false,

  highlight = { enable = true },
  indent = { enable = true },
  incremental_selection = {
    enable = true,
    keymaps = {
      init_selection = '<c-space>',
      node_incremental = '<c-space>',
      scope_incremental = '<c-s>',
      node_decremental = '<M-space>',
    },
  },
  textobjects = {
    select = {
      enable = true,
      lookahead = true, -- Automatically jump forward to textobj, similar to targets.vim
      keymaps = {
        -- You can use the capture groups defined in textobjects.scm
        ['aa'] = '@parameter.outer',
        ['ia'] = '@parameter.inner',
        ['af'] = '@function.outer',
        ['if'] = '@function.inner',
        ['ac'] = '@class.outer',
        ['ic'] = '@class.inner',
      },
    },
    move = {
      enable = true,
      set_jumps = true, -- whether to set jumps in the jumplist
      goto_next_start = {
        [']m'] = '@function.outer',
        [']]'] = '@class.outer',
      },
      goto_next_end = {
        [']M'] = '@function.outer',
        [']['] = '@class.outer',
      },
      goto_previous_start = {
        ['[m'] = '@function.outer',
        ['[['] = '@class.outer',
      },
      goto_previous_end = {
        ['[M'] = '@function.outer',
        ['[]'] = '@class.outer',
      },
    },
    swap = {
      enable = true,
      swap_next = {
        ['<leader>i'] = '@parameter.inner',
      },
      swap_previous = {
        ['<leader>I'] = '@parameter.inner',
      },
    },
  },
}

-- Diagnostic keymaps
vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, { desc = 'Go to previous diagnostic message' })
vim.keymap.set('n', ']d', vim.diagnostic.goto_next, { desc = 'Go to next diagnostic message' })
vim.keymap.set('n', '<leader>e', vim.diagnostic.open_float, { desc = 'Open floating diagnostic message' })
vim.keymap.set('n', '<leader>q', vim.diagnostic.setloclist, { desc = 'Open diagnostics list' })

-- [[ Configure LSP ]]
--  This function gets run when an LSP connects to a particular buffer.
local on_attach = function(_, bufnr)
  -- NOTE: Remember that lua is a real programming language, and as such it is possible
  -- to define small helper and utility functions so you don't have to repeat yourself
  -- many times.
  --
  -- In this case, we create a function that lets us more easily define mappings specific
  -- for LSP related items. It sets the mode, buffer and description for us each time.
  local nmap = function(keys, func, desc)
    if desc then
      desc = 'LSP: ' .. desc
    end

    vim.keymap.set('n', keys, func, { buffer = bufnr, desc = desc })
  end

  nmap('<leader>rn', vim.lsp.buf.rename, '[R]e[n]ame')
  nmap('<leader>ca', vim.lsp.buf.code_action, '[C]ode [A]ction')

  nmap('gd', vim.lsp.buf.definition, '[G]oto [D]efinition')
  nmap('gr', require('telescope.builtin').lsp_references, '[G]oto [R]eferences')
  nmap('gI', require('telescope.builtin').lsp_implementations, '[G]oto [I]mplementation')
  nmap('<leader>D', vim.lsp.buf.type_definition, 'Type [D]efinition')
  nmap('<leader>ds', require('telescope.builtin').lsp_document_symbols, '[D]ocument [S]ymbols')
  nmap('<leader>ws', require('telescope.builtin').lsp_dynamic_workspace_symbols, '[W]orkspace [S]ymbols')

  -- See `:help K` for why this keymap
  nmap('K', vim.lsp.buf.hover, 'Hover Documentation')
  nmap('<C-k>', vim.lsp.buf.signature_help, 'Signature Documentation')

  -- Lesser used LSP functionality
  nmap('gD', vim.lsp.buf.declaration, '[G]oto [D]eclaration')
  nmap('<leader>wa', vim.lsp.buf.add_workspace_folder, '[W]orkspace [A]dd Folder')
  nmap('<leader>wr', vim.lsp.buf.remove_workspace_folder, '[W]orkspace [R]emove Folder')
  nmap('<leader>wl', function()
    print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
  end, '[W]orkspace [L]ist Folders')

  -- Create a command `:Format` local to the LSP buffer
  vim.api.nvim_buf_create_user_command(bufnr, 'Format', function(_)
    vim.lsp.buf.format()
  end, { desc = 'Format current buffer with LSP' })

  -- Enable auto-formatting on save
  vim.api.nvim_command([[
    augroup AutoFormatOnSave
      autocmd!
      autocmd BufWritePre * :Format
    augroup END
  ]])
end

-- Enable the following language servers
--  Feel free to add/remove any LSPs that you want here. They will automatically be installed.
--
--  Add any additional override configuration in the following tables. They will be passed to
--  the `settings` field of the server config. You must look up that documentation yourself.
--
--  If you want to override the default filetypes that your language server will attach to you can
--  define the property 'filetypes' to the map in question.

-- Function to find the nearest venv path in parent directories.
local function find_nearest_venv(starting_path)
  local current_path = starting_path
  while current_path do
    local venv_path = current_path .. '/venv/bin/python'
    if vim.fn.filereadable(venv_path) == 1 then
      return venv_path
    end
    local parent_path = vim.fn.fnamemodify(current_path, ':h')
    if parent_path == current_path then
      break
    end
    current_path = parent_path
  end
  return nil
end

-- Get the path of the current file.
local current_file = vim.fn.expand('%:p')

-- Get the venv path for the current project directory.
local venv_path = find_nearest_venv(current_file)

if venv_path then
  -- Use the venv path as your Python interpreter.
  vim.g.python3_host_prog = venv_path
else
  -- Fallback to a system-wide Python interpreter.
  vim.g.python3_host_prog = '/usr/bin/python3'
end

local servers = {
  clangd = {},
  gopls = {
    settings = {
      plugins = {
        revive = {},
      },
      gopls = {
        completeUnimported = true,
        usePlaceholders = true,
        analysis = {
          unusedarams = true,
        },
      },
    },
  },
  pylsp = {
    settings = {
      pylsp = {
        plugins = {
          pycodestyle = {
            ignore = { 'W391' },
            maxLineLength = 79
          },
          flake8 = {},
          black = {
            lineLength = 79,
            -- Configure Black to split lines without specifying a target version
            blackArgs = {
              "--line-length",
              "79",
              "--exclude",
              "venv",
              "--exclude",
              "env",
              "--exclude",
              ".git",
              "--exclude",
              ".hg",
            },
          },
          mypy = {
            enabled = true,
            command = 'mypy',
            args = {},
            diagnostics = true,
          },
          isort = {
            profile = 'black',
          },
        },
        python = {
          -- Specify the path to your Python interpreter
          pythonPath = "/usr/bin/python3",
          analysis = {
            autoSearchPaths = true,
            diagnosticMode = 'openFilesOnly',
            useLibraryCodeForTypes = true,
            typeCheckingMode = 'on',
          },
        },
      },
    },
  },
  -- rust_analyzer = {},
  -- tsserver = {},
  -- html = { filetypes = { 'html', 'twig', 'hbs'} },

  lua_ls = {
    Lua = {
      workspace = { checkThirdParty = false },
      telemetry = { enable = false },
    },
  },
}

-- Setup neovim lua configuration
require('neodev').setup()

-- nvim-cmp supports additional completion capabilities, so broadcast that to servers
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities = require('cmp_nvim_lsp').default_capabilities(capabilities)
-- Setup Mason condifuration
local mason = require 'mason'

mason.setup {
  ui = {
    icons = {
      package_installed = "✓",
      package_pending = "➜",
      package_uninstalled = "✗",
    },
  },
}
-- Ensure the servers above are installed
local mason_lspconfig = require 'mason-lspconfig'

mason_lspconfig.setup {
  ensure_installed = vim.tbl_keys(servers)
}

mason_lspconfig.setup_handlers {
  function(server_name)
    require('lspconfig')[server_name].setup {
      capabilities = capabilities,
      on_attach = on_attach,
      settings = servers[server_name],
      filetypes = (servers[server_name] or {}).filetypes,
    }
  end
}

-- Setup Linters
local mason_tool_installer = require("mason-tool-installer")

mason_tool_installer.setup({
  ensure_installed = {
    "prettier",
    "stylua",
    "isort",
    "black",
    "flake8",
    "mypy",
    "revive",
  },
})


-- [[ Configure nvim-cmp ]]
-- See `:help cmp`
local cmp = require 'cmp'
local luasnip = require 'luasnip'
require('luasnip.loaders.from_vscode').lazy_load()
luasnip.config.setup {}

cmp.setup {
  snippet = {
    expand = function(args)
      luasnip.lsp_expand(args.body)
    end,
  },
  mapping = cmp.mapping.preset.insert {
    ['<C-n>'] = cmp.mapping.select_next_item(),
    ['<C-p>'] = cmp.mapping.select_prev_item(),
    ['<C-d>'] = cmp.mapping.scroll_docs(-4),
    ['<C-f>'] = cmp.mapping.scroll_docs(4),
    ['<C-Space>'] = cmp.mapping.complete {},
    ['<CR>'] = cmp.mapping.confirm {
      behavior = cmp.ConfirmBehavior.Replace,
      select = true,
    },
    ['<Tab>'] = cmp.mapping(function(fallback)
      if cmp.visible() then
        cmp.select_next_item()
      elseif luasnip.expand_or_locally_jumpable() then
        luasnip.expand_or_jump()
      else
        fallback()
      end
    end, { 'i', 's' }),
    ['<S-Tab>'] = cmp.mapping(function(fallback)
      if cmp.visible() then
        cmp.select_prev_item()
      elseif luasnip.locally_jumpable(-1) then
        luasnip.jump(-1)
      else
        fallback()
      end
    end, { 'i', 's' }),
  },
  sources = {
    { name = 'nvim_lsp' },
    { name = 'luasnip' },
  },
}

-- The line beneath this is called `modeline`. See `:help modeline`
-- vim: ts=2 sts=2 sw=2 et