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local M = {}

---@class java-core.Log2Config

---@field use_console boolean Enable console logging

---@field use_file boolean Enable file logging

---@field level java-core.LogLevel Minimum log level to display

---@field log_file string Path to log file

---@field max_lines number Maximum lines to keep in log file

---@field show_location boolean Show file location in log messages

---@class java-core.PartialLog2Config

---@field use_console? boolean Enable console logging

---@field use_file? boolean Enable file logging

---@field level? java-core.LogLevel Minimum log level to display

---@field log_file? string Path to log file

---@field max_lines? number Maximum lines to keep in log file

---@field show_location? boolean Show file location in log messages

---@type java-core.Log2Config

local default_config = {

use_console = false,

use_file = true,

level = 'info',

log_file = vim.fn.stdpath('log') .. '/nvim-java.log',

max_lines = 100,

show_location = false,

}

---@type java-core.Log2Config

local config = vim.deepcopy(default_config)

local log_levels = {

trace = 1,

debug = 2,

info = 3,

warn = 4,

error = 5,

fatal = 6,

}

local highlights = {

trace = 'Comment',

debug = 'Debug',

info = 'DiagnosticInfo',

warn = 'DiagnosticWarn',

error = 'DiagnosticError',

fatal = 'ErrorMsg',

}

---@param user_config? java-core.PartialLog2Config

function M.setup(user_config)

config = vim.tbl_deep_extend('force', config, user_config or {})

end

--- Write message to log file with line limit

---@param msg string

---@private

local function write_to_file(msg)

local log_file = config.log_file

local lines = {}

local file = io.open(log_file, 'r')

if file then

for line in file:lines() do

table.insert(lines, line)

end

file:close()

end

table.insert(lines, msg)

while #lines > config.max_lines do

table.remove(lines, 1)

end

file = io.open(log_file, 'w')

if file then

for _, line in ipairs(lines) do

file:write(line .. '\n')

end

file:close()

end

--- Log a message

---@param level java-core.LogLevel

---@param ... any

local function log(level, ...)

if log_levels[level] < log_levels[config.level] then

return

end

local logs = {}

for _, v in ipairs({ ... }) do

table.insert(logs, vim.inspect(v))

end

local location = ''

if config.show_location then

local info = debug.getinfo(3, 'Sl')

if info then

local file = info.short_src or info.source or 'unknown'

local line = info.currentline or 0

location = '[' .. file .. ':' .. line .. ']'

end

local msg = level:upper() .. (location ~= '' and '::' .. location or '') .. '::' .. table.concat(logs, '::')

if config.use_console then

local hl = highlights[level] or 'Normal'

vim.api.nvim_echo({ { msg, hl } }, true, {})

end

if config.use_file then

write_to_file(msg)

end

function M.info(...)

log('info', ...)

end

function M.debug(...)

log('debug', ...)

end

function M.fatal(...)

log('fatal', ...)

end

function M.error(...)

log('error', ...)

end

function M.trace(...)

log('trace', ...)

end

function M.warn(...)

log('warn', ...)

end

return M

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