-- Project specific settings

local M = {}

-- Helper to create mappings
local helpers = require 'helpers'
local map = helpers.map

local function relevant_directory_from_cwd(cwd)
    local basename = vim.fn.fnamemodify(cwd, ':t')
    local nested_folder_names = { 'server', 'frontend', 'frontend2', 'client', 'backend' }
    if vim.tbl_contains(nested_folder_names, basename) then
        local parent = vim.fn.fnamemodify(cwd, ':h')
        return relevant_directory_from_cwd(parent)
    end
    return cwd
end

-- Get the last folder name from a path
local function project_name_from_dir(dir)
    return vim.fn.fnamemodify(dir, ':t')
end

local last_applied = nil

function M.apply(cwd)
    local dir = relevant_directory_from_cwd(cwd or vim.fn.getcwd())
    local name = project_name_from_dir(dir)
    if last_applied == name then
        return
    end
    last_applied = name

    -- Check if project lua file exists in nvim config path
    if vim.fn.filereadable(vim.fn.stdpath 'config' .. '/lua/projects/' .. name .. '.lua') == 1 then
        local setup = require('projects.' .. name)
        helpers.edit_cf('w', '/lua/projects/' .. name .. '.lua')
        setup(dir)
        vim.notify(('Project config loaded: %s'):format(name), vim.log.levels.INFO, { title = 'projects.lua' })

        -- Source the project file to apply any new settings
        vim.api.nvim_create_autocmd({ 'BufWritePost' }, {
            pattern = { vim.fn.stdpath 'config' .. '/lua/projects/' .. name .. '.lua' },
            callback = function()
                package.loaded['projects.' .. name] = nil
                local setup = require('projects.' .. name)
                setup(dir)
                vim.notify(('Project config reloaded: %s'):format(name), vim.log.levels.INFO, { title = 'projects.lua' })
            end,
        })
    end
end

-- Apply on startup and when the working directory changes
do
    local grp = vim.api.nvim_create_augroup('ProjectConfig', { clear = true })

    vim.api.nvim_create_autocmd('VimEnter', {
        group = grp,
        callback = function()
            M.apply()
        end,
    })

    vim.api.nvim_create_autocmd('DirChanged', {
        group = grp,
        callback = function(args)
            -- args.file is the new cwd for DirChanged
            M.apply(args and args.file or nil)
        end,
    })
end

-- Optional command to manually re-apply
vim.api.nvim_create_user_command('ProjectReload', function()
    last_applied = nil
    M.apply()
end, {})