local M = {}

function M.config()
	local status_lualine_ok, lualine = pcall(require, 'lualine')
	if not status_lualine_ok then
		return
	end

	local status_gitblame_ok, gitblame = pcall(require, 'gitblame')
	if not status_gitblame_ok then
		return
	end

	local scolors = {
		fg = '#adb0b9',
		fg_wash = '#808289',
		bg = '#252526',
		inset = '#569cd6',

		working_dir = '#569cd6',
		branch = '#dcdcaa',
		filetype = '#c5a6c0',
		filename = '#91bde1',

		added = '#6a9955',
		modified = '#db812e',
		removed = '#f6635a',

		error = '#f53226',
		warn = '#eed94e',
		info = '#569cd6',

		treesitter = '#6a9955',

		scroll = '#dcdcaa',
	}

	local conditions = {
		buffer_not_empty = function()
			return vim.fn.empty(vim.fn.expand('%:t')) ~= 1
		end,
		hide_in_width = function()
			return vim.fn.winwidth(0) > 80
		end,
		check_git_workspace = function()
			local filepath = vim.fn.expand('%:p:h')
			local gitdir = vim.fn.finddir('.git', filepath .. ';')
			return gitdir and #gitdir > 0 and #gitdir < #filepath
		end,
	}

	local config = {
		options = {
			disabled_filetypes = { 'NvimTree', 'dashboard', 'Outline' },
			component_separators = '',
			section_separators = '',
			theme = {
				normal = { c = { fg = scolors.fg, bg = scolors.bg } },
				inactive = { c = { fg = scolors.fg, bg = scolors.bg } },
			},
		},
		sections = {
			lualine_a = {},
			lualine_b = {},
			lualine_c = {
				{ -- working dir
					function()
						local cwd = vim.fn.getcwd()
						-- substr the cwd starting at the last "/" character
						local cwd_name = string.sub(cwd, -cwd:reverse():find('/') + 1)
						return cwd_name
					end,
					color = { fg = scolors.working_dir, gui = 'bold' },
					icon = '',
					padding = { left = 2, right = 1 },
				},
				{ -- file name
					'filename',
					path = 1,
					icon = '',
					color = { fg = scolors.filename, gui = 'bold' },
					padding = { left = 1, right = 1 },
				},
				-- { -- git branch
				-- 	"branch",
				-- 	icon = "",
				-- 	color = { fg = scolors.branch, gui = "bold" },
				-- 	padding = { left = 1, right = 1 },
				-- },
				{ -- filetype
					'filetype',
					colored = false,
					color = { fg = scolors.filetype, gui = 'bold' },
					cond = conditions.buffer_not_empty,
					padding = { left = 1, right = 1 },
				},
				{ -- git diff
					'diff',
					symbols = { added = ' ', modified = '柳', removed = ' ' },
					diff_color = {
						added = { fg = scolors.added },
						modified = { fg = scolors.modified },
						removed = { fg = scolors.removed },
					},
					cond = conditions.hide_in_width,
					padding = { left = 1, right = 1 },
				},
				{ -- nvim diagnostics
					'diagnostics',
					sources = { 'nvim_diagnostic' },
					symbols = { error = ' ', warn = ' ', info = ' ', hint = ' ' },
					diagnostics_color = {
						color_error = { fg = scolors.error },
						color_warn = { fg = scolors.warn },
						color_info = { fg = scolors.info },
					},
					padding = { left = 1, right = 1 },
				},
			},
			lualine_x = {
				{ -- git blame
					function()
						local blame_text = gitblame.get_current_blame_text()
						blame_text = blame_text:gsub('Not Committed Yet', 'not committed')
						return blame_text
					end,
					color = { fg = scolors.fg_wash },
					cond = gitblame.is_blame_text_available,
					padding = { left = 0, right = 1 },
				},
				{ -- location in file (line:col)
					'location',
					padding = { left = 0, right = 1 },
				},
				{ -- progress through file (%)
					-- slightly modified from default "progress"
					-- always 3 chars long, no TOP
					-- https://github.com/nvim-lualine/lualine.nvim/blob/master/lua/lualine/components/progress.lua
					function()
						local cur = vim.fn.line('.')
						local total = vim.fn.line('$')
						if cur == total then
							return 'BOT'
						elseif cur / total < 0.10 then
							return ' ' .. math.floor(cur / total * 100) .. '%%'
						else
							return math.floor(cur / total * 100) .. '%%'
						end
					end,
					'progress',
					color = { gui = 'none' },
					padding = { left = 0, right = 1 },
				},
			},
			lualine_y = {},
			lualine_z = {},
		},
		inactive_sections = {
			lualine_a = {
				{ -- file name
					'filename',
					path = 1,
					icon = '',
					color = { fg = scolors.filename, gui = 'bold' },
					padding = { left = 1, right = 1 },
				},
			},
			lualine_b = {},
			lualine_c = {},
			lualine_x = {},
			lualine_y = {},
			lualine_z = {},
		},
	}

	lualine.setup(config)
end

return M