---@class ow.lsp.CodeLensResponse : ow.lsp.Response
---@field result lsp.CodeLens[]

local Row = require("lsp.codelens.row")
local Session = require("lsp.codelens.session")
local log = require("log")

local GROUP = vim.api.nvim_create_augroup("ow.lsp.codelens", { clear = true })

local M = {}

---@param buf? integer
---@return boolean
function M.is_enabled(buf)
    buf = buf or vim.api.nvim_get_current_buf()
    local session = Session.find(buf)
    return session ~= nil and session.enabled
end

---@param value? boolean
---@param buf? integer
function M.enable(value, buf)
    if value == nil then
        value = true
    end
    buf = buf or vim.api.nvim_get_current_buf()
    Session.get(buf):enable(value)
end

---@param buf? integer
function M.toggle(buf)
    buf = buf or vim.api.nvim_get_current_buf()
    Session.get(buf):toggle()
end

---@class ow.lsp.codelens.SetupOpts : ow.lsp.codelens.row.ConfigureOpts

---@param opts? ow.lsp.codelens.SetupOpts
function M.setup(opts)
    Row.configure(opts or {})

    ---@param err lsp.ResponseError?
    ---@param ctx lsp.HandlerContext
    vim.lsp.handlers["workspace/codeLens/refresh"] = function(err, _, ctx)
        if err then
            log.warning(
                "client %d: error on %s: %s",
                ctx.client_id,
                ctx.method,
                err.message
            )
        end
        for buf, session in pairs(Session.all()) do
            if
                session.enabled
                and #vim.lsp.get_clients({ bufnr = buf, id = ctx.client_id })
                    > 0
            then
                session:refresh()
            end
        end
        return vim.NIL
    end

    vim.api.nvim_create_autocmd({ "BufEnter", "LspAttach" }, {
        group = GROUP,
        callback = function(ev)
            local session = Session.find(ev.buf)
            if session and session.enabled then
                session:refresh()
            end
        end,
    })

    vim.api.nvim_create_autocmd({ "BufDelete", "BufWipeout" }, {
        group = GROUP,
        callback = function(ev)
            Session.remove(ev.buf)
        end,
    })
end

return M