local status_ok, lualine = pcall(require, 'lualine')
if not status_ok then
    return
end

local hide_in_width = function()
    return vim.fn.winwidth(0) > 80
end

local diagnostics = {
    'diagnostics',
    sources = { 'nvim_diagnostic' },
    sections = { 'error', 'warn' },
    symbols = { error = ' ', warn = ' ' },
    colored = false,
    update_in_insert = false,
    always_visible = true,
}

local diff = {
    'diff',
    colored = false,
    symbols = { added = ' ', modified = ' ', removed = ' ' }, -- changes diff symbols
    cond = hide_in_width
}

local mode = {
    'mode',
    fmt = function(str)
        return '-- ' .. str .. ' --'
    end,
}

local filetype = {
    'filetype',
    icons_enabled = false,
    icon = nil,
}

local branch = {
    'branch',
    icons_enabled = true,
    icon = '',
}

local location = {
    'location',
    padding = 0,
}

-- cool function for progress
local progress = function()
    local current_line = vim.fn.line('.')
    local total_lines = vim.fn.line('$')
    local chars = { '__', '▁▁', '▂▂', '▃▃', '▄▄', '▅▅', '▆▆', '▇▇', '██' }
    local line_ratio = current_line / total_lines
    local index = math.ceil(line_ratio * #chars)
    return chars[index]
end

local spaces = function()
    return 'spaces: ' .. vim.api.nvim_buf_get_option(0, 'shiftwidth')
end

lualine.setup({
    options = {
        icons_enabled = true,
        theme = 'auto',
        component_separators = { left = '', right = ''},
        section_separators = { left = '', right = ''},
        disabled_filetypes = {},
        always_divide_middle = true,
        globalstatus = false,
    },
    sections = {
        lualine_a = {'mode'},
        lualine_b = {'branch', 'diff', 'diagnostics'},
        lualine_c = {'filename'},
        lualine_x = {'encoding', 'fileformat', 'filetype'},
        lualine_y = {'progress'},
        lualine_z = {'location'}
    },
    inactive_sections = {
        lualine_a = {},
        lualine_b = {},
        lualine_c = { 'filename' },
        lualine_x = { 'location' },
        lualine_y = {},
        lualine_z = {},
    },
    tabline = {},
    extensions = {},
})