local M = {}

---Check if path exists
---@param p string|nil
---@return boolean
local function path_exists(p)
  return p and p ~= '' and vim.uv.fs_stat(p) ~= nil
end

---Get Mason binary path
---@param name string
---@return string
local function mason_bin(name)
  local p = vim.fs.joinpath(vim.fn.stdpath('data'), 'mason', 'bin', name)
  if path_exists(p) then
    return p
  end
  return name
end

---Find Julia binary
---@return string
local function julia_bin()
  local home = vim.env.HOME or ''
  local candidates = {
    vim.fn.exepath('julia'),
    vim.fs.joinpath(home, '.juliaup', 'bin', 'julia'),
    '/opt/homebrew/bin/julia',
    '/usr/local/bin/julia',
  }
  for _, p in ipairs(candidates) do
    if path_exists(p) then
      return p
    end
  end
  return 'julia'
end

local julia_cmd = julia_bin()
local julia_ls_project = vim.fn.expand('~/.julia/environments/nvim-lsp')

-- Servers that should provide formatting
M.format_enabled_servers = {
  bashls = true,
  clangd = true,
  gopls = true,
  html = true,
  htmx = true,
  jsonls = true,
  lua_ls = true,
  marksman = true,
  pyright = true,
  ruff = true,
  rust_analyzer = true,
  taplo = true,
  texlab = true,
  yamlls = true,
  zls = true,
}

-- Server-specific configurations
M.servers = {
  bashls = {
    filetypes = { 'sh', 'bash', 'zsh' },
  },

  html = {
    filetypes = { 'html', 'htmldjango' },
    init_options = {
      configurationSection = { 'html', 'css', 'javascript' },
      embeddedLanguages = {
        css = true,
        javascript = true,
      },
    },
  },

  htmx = {
    cmd = { 'htmx-lsp' },
    filetypes = { 'html', 'htmx' },
  },

  gopls = {
    settings = {
      gopls = {
        gofumpt = true,
        staticcheck = true,
        completeUnimported = true,
        usePlaceholders = true,
        analyses = { unusedparams = true },
      },
    },
  },

  clangd = {
    cmd = {
      'clangd',
      '--background-index',
      '--clang-tidy',
      '--header-insertion=iwyu',
      '--completion-style=detailed',
      '--header-insertion-decorators',
      '--query-driver=/usr/bin/clang,/usr/bin/clang++',
      '--enable-config',
    },
    settings = {
      formatting = true,
      inlayHints = {
        designators = true,
        enabled = true,
        parameterNames = true,
        deducedTypes = true,
      },
    },
    filetypes = { 'c', 'cpp', 'objc', 'objcpp', 'h', 'hpp', 'hxx' },
  },

  marksman = {
    filetypes = { 'markdown' },
    settings = {
      marksman = {
        extensions = { 'mdx' },
      },
    },
  },

  jsonls = {
    cmd = { 'vscode-json-language-server', '--stdio' },
    settings = {
      json = {
        validate = { enable = true },
      },
    },
  },

  julials = {
    filetypes = { 'julia' },
    cmd = {
      julia_cmd,
      '--project=' .. julia_ls_project,
      '--startup-file=no',
      '--history-file=no',
      '-e',
      [[
      using Logging
      using LanguageServer
      using SymbolServer

      global_logger(ConsoleLogger(stderr, Logging.Warn))

      function project_path()
        try
          return LanguageServer.find_project_path(pwd())
        catch
          return pwd()
        end
      end

      depot_path = get(ENV, "JULIA_DEPOT_PATH", "")

      server = LanguageServer.LanguageServerInstance(
        stdin,
        stdout,
        something(project_path(), pwd()),
        depot_path,
      )

      server.runlinter = true
      run(server)
    ]],
    },
    settings = {
      julia = {
        lint = {
          run = true,
        },
      },
    },
  },

  pyright = {
    settings = {
      python = {
        analysis = {
          autoSearchPaths = true,
          diagnosticMode = 'workspace',
          useLibraryCodeForTypes = true,
          typeCheckingMode = 'none',
          reportGeneralTypeIssues = false,
        },
      },
    },
  },

  ruff = {
    filetypes = { 'python' },
    on_init = function()
      vim.api.nvim_create_autocmd('LspAttach', {
        group = vim.api.nvim_create_augroup('lsp_attach_disable_ruff_hover', { clear = true }),
        callback = function(args)
          local client = vim.lsp.get_client_by_id(args.data.client_id)
          if client and client.name == 'ruff' then
            client.server_capabilities.hoverProvider = false
          end
        end,
        desc = 'LSP: Disable hover capability from Ruff',
      })
    end,
  },

  rust_analyzer = {
    settings = {
      ['rust-analyzer'] = {
        imports = { granularity = { group = 'module' }, prefix = 'self' },
        cargo = { buildScripts = { enable = true } },
        procMacro = { enable = true },
        checkOnSave = { command = 'clippy' },
      },
    },
  },

  taplo = {
    filetypes = { 'toml' },
  },

  yamlls = {
    settings = {
      yaml = {
        schemaStore = { enable = true },
        validate = true,
      },
    },
  },

  texlab = {
    filetypes = { 'tex', 'plaintex', 'bib', 'cls', 'sty' },
    settings = {
      texlab = {
        build = {
          onSave = false,
        },
        diagnostics = {
          ignoredPatterns = {
            '^Overfull \\hbox',
            '^Underfull \\hbox',
            '^Package.*Warning',
          },
        },
        auxDirectory = 'output',
      },
    },
  },

  lua_ls = {
    cmd = { mason_bin('lua-language-server') },
    settings = {
      Lua = {
        workspace = { checkThirdParty = false },
        telemetry = { enable = false },
        diagnostics = { globals = { 'vim' } },
      },
    },
  },

  sqls = {
    filetypes = { 'sql', 'mysql', 'plsql', 'postgresql' },
    settings = {
      sql = {
        connections = {
          {
            driver = 'sqlite3',
            dataSourceName = 'file::memory:?cache=shared',
          },
        },
      },
    },
    on_init = function(client)
      local root_dir = client.config.root_dir or vim.fn.getcwd()
      local db_files = vim.fn.globpath(root_dir, '*.db', false, true)
      vim.list_extend(db_files, vim.fn.globpath(root_dir, '*.sqlite', false, true))

      if #db_files > 0 then
        local connections = {}
        for _, path in ipairs(db_files) do
          table.insert(connections, {
            driver = 'sqlite3',
            dataSourceName = vim.fn.fnamemodify(path, ':p'),
          })
        end
        client.config.settings.sql.connections = connections
        client.notify('workspace/didChangeConfiguration', { settings = client.config.settings })
      end
    end,
  },

  zls = {
    filetypes = { 'zig' },
  },
}

return M