local M = {}

local C = require("catppuccin.palettes").get_palette()
local ok, lsp = pcall(require, "feline.providers.lsp")
local assets = nil

if ok then
	assets = {
		left_separator = "",
		right_separator = "",
		mode_icon = "",
		dir = "󰉖",
		file = "󰈙",
		lsp = {
			server = "󰅡",
			error = "",
			warning = "",
			info = "",
			hint = "",
		},
		git = {
			branch = "",
			added = "",
			changed = "",
			removed = "",
		},
	}

	local sett = {
		text = C.mantle,
		bkg = C.crust,
		diffs = C.mauve,
		extras = C.overlay1,
		curr_file = C.maroon,
		curr_dir = C.flamingo,
		show_modified = false,
		show_lazy_updates = false,
	}

	if require("catppuccin").flavour == "latte" then
		local latte = require("catppuccin.palettes").get_palette "latte"
		sett.text = latte.base
		sett.bkg = latte.crust
	end

	if require("catppuccin").options.transparent_background then sett.bkg = "NONE" end

	local mode_colors = {
		["n"] = { "NORMAL", C.lavender },
		["no"] = { "N-PENDING", C.lavender },
		["i"] = { "INSERT", C.green },
		["ic"] = { "INSERT", C.green },
		["t"] = { "TERMINAL", C.green },
		["v"] = { "VISUAL", C.flamingo },
		["V"] = { "V-LINE", C.flamingo },
		[""] = { "V-BLOCK", C.flamingo },
		["R"] = { "REPLACE", C.maroon },
		["Rv"] = { "V-REPLACE", C.maroon },
		["s"] = { "SELECT", C.maroon },
		["S"] = { "S-LINE", C.maroon },
		[""] = { "S-BLOCK", C.maroon },
		["c"] = { "COMMAND", C.peach },
		["cv"] = { "COMMAND", C.peach },
		["ce"] = { "COMMAND", C.peach },
		["r"] = { "PROMPT", C.teal },
		["rm"] = { "MORE", C.teal },
		["r?"] = { "CONFIRM", C.mauve },
		["!"] = { "SHELL", C.green },
	}

	local view = {
		lsp = {
			progress = true,
			name = false,
			exclude_lsp_names = {},
			separator = "|",
		},
	}

	local is_lsp_in_excluded_list = function(lsp_name)
		for _, excluded_lsp in ipairs(view.lsp.exclude_lsp_names) do
			if lsp_name == excluded_lsp then return true end
		end
		return false
	end

	function M.setup(opts)
		if opts then
			opts.assets = opts.assets or {}
			opts.sett = opts.sett or {}
			opts.mode_colors = opts.mode_colors or {}
			opts.view = opts.view or {}
		else
			opts = {
				assets = {},
				sett = {},
				mode_colors = {},
				view = {},
			}
		end
		assets = vim.tbl_deep_extend("force", assets, opts.assets)
		sett = vim.tbl_deep_extend("force", sett, opts.sett)
		mode_colors = vim.tbl_deep_extend("force", mode_colors, opts.mode_colors)
		view = vim.tbl_deep_extend("force", view, opts.view)
	end

	function M.get_statusline()
		local shortline = false

		local components = {
			active = { {}, {}, {} }, -- left, center, right
			inactive = { {} },
		}

		local function is_enabled(min_width)
			if shortline then return true end

			return vim.api.nvim_win_get_width(0) > min_width
		end

		-- global components
		local invi_sep = {
			str = " ",
			hl = {
				fg = sett.bkg,
				bg = sett.bkg,
			},
		}

		-- helpers
		local function any_git_changes()
			local gst = vim.b.gitsigns_status_dict -- git stats
			if gst then
				if
					gst["added"] and gst["added"] > 0
					or gst["removed"] and gst["removed"] > 0
					or gst["changed"] and gst["changed"] > 0
				then
					return true
				end
			end
			return false
		end

		-- #################### STATUSLINE ->

		-- ######## Left

		-- Current vi mode ------>
		local vi_mode_hl = function()
			return {
				fg = sett.text,
				bg = mode_colors[vim.fn.mode()][2],
				style = "bold",
			}
		end

		components.active[1][1] = {
			provider = " " .. assets.mode_icon .. " ",
			hl = function()
				return {
					fg = sett.text,
					bg = mode_colors[vim.fn.mode()][2],
				}
			end,
		}

		components.active[1][2] = {
			provider = function() return mode_colors[vim.fn.mode()][1] .. " " end,
			hl = vi_mode_hl,
		}

		-- there is a dilemma: we need to hide Diffs if there is no git info. We can do that, but this will
		-- leave the right_separator colored with purple, and since we can't change the color conditonally
		-- then the solution is to create two right_separators: one with a mauve sett.bkg and the other one normal
		-- sett.bkg; both have the same fg (vi mode). The mauve one appears if there is git info, else the one with
		-- the normal sett.bkg appears. Fixed :)

		-- enable if git diffs are not available
		components.active[1][3] = {
			provider = assets.right_separator,
			hl = function()
				return {
					fg = mode_colors[vim.fn.mode()][2],
					bg = sett.bkg,
				}
			end,
			enabled = function() return not any_git_changes() end,
		}

		-- enable if git diffs are available
		components.active[1][4] = {
			provider = assets.right_separator,
			hl = function()
				return {
					fg = mode_colors[vim.fn.mode()][2],
					bg = sett.diffs,
				}
			end,
			enabled = function() return any_git_changes() end,
		}
		-- Current vi mode ------>

		-- Diffs ------>
		components.active[1][5] = {
			provider = "git_diff_added",
			hl = {
				fg = sett.text,
				bg = sett.diffs,
			},
			icon = " " .. assets.git.added .. " ",
		}

		components.active[1][6] = {
			provider = "git_diff_changed",
			hl = {
				fg = sett.text,
				bg = sett.diffs,
			},
			icon = " " .. assets.git.changed .. " ",
		}

		components.active[1][7] = {
			provider = "git_diff_removed",
			hl = {
				fg = sett.text,
				bg = sett.diffs,
			},
			icon = " " .. assets.git.removed .. " ",
		}

		components.active[1][8] = {
			provider = " ",
			hl = {
				fg = sett.bkg,
				bg = sett.diffs,
			},
			enabled = function() return any_git_changes() end,
		}

		components.active[1][9] = {
			provider = assets.right_separator,
			hl = {
				fg = sett.diffs,
				bg = sett.bkg,
			},
			enabled = function() return any_git_changes() end,
		}
		-- Diffs ------>

		-- Extras ------>

		-- file progress
		components.active[1][10] = {
			provider = function()
				local current_line = vim.fn.line "."
				local total_line = vim.fn.line "$"

				if current_line == 1 then
					return "Top"
				elseif current_line == vim.fn.line "$" then
					return "Bot"
				end
				local result, _ = math.modf((current_line / total_line) * 100)
				return result .. "%%"
			end,
			-- enabled = shortline or function(winid)
			-- 	return vim.api.nvim_win_get_width(winid) > 90
			-- end,
			hl = {
				fg = sett.extras,
				bg = sett.bkg,
			},
			left_sep = invi_sep,
		}

		-- position
		components.active[1][11] = {
			provider = "position",
			-- enabled = shortline or function(winid)
			-- 	return vim.api.nvim_win_get_width(winid) > 90
			-- end,
			hl = {
				fg = sett.extras,
				bg = sett.bkg,
			},
			left_sep = invi_sep,
		}

		-- macro
		components.active[1][12] = {
			provider = "macro",
			enabled = function() return vim.api.nvim_get_option_value("cmdheight", { scope = "global" }) == 0 end,
			hl = {
				fg = sett.extras,
				bg = sett.bkg,
			},
			left_sep = invi_sep,
		}

		-- search count
		components.active[1][13] = {
			provider = "search_count",
			enabled = function() return vim.api.nvim_get_option_value("cmdheight", { scope = "global" }) == 0 end,
			hl = {
				fg = sett.extras,
				bg = sett.bkg,
			},
			left_sep = invi_sep,
		}

		-- lazy.nvim updates
		components.active[1][14] = {
			provider = function() return require("lazy.status").updates() end,
			enabled = function()
				if sett.show_lazy_updates and pcall(require, "lazy") then
					return require("lazy.status").has_updates()
				else
					return false
				end
			end,
			hl = {
				fg = sett.extras,
				bg = sett.bkg,
			},
			left_sep = invi_sep,
		}
		-- Extras ------>

		-- ######## Left

		-- ######## Center

		-- Diagnostics ------>
		-- workspace loader
		components.active[2][1] = {
			provider = function()
				if vim.lsp.status then return "" end
				local Lsp = vim.lsp.util.get_progress_messages()[1]

				if Lsp then
					local msg = Lsp.message or ""
					local percentage = Lsp.percentage
					if not percentage then return "" end
					local title = Lsp.title or ""
					local spinners = {
						"",
						"󰀚",
						"",
					}
					local success_icon = {
						"",
						"",
						"",
					}
					local ms = vim.loop.hrtime() / 1000000
					local frame = math.floor(ms / 120) % #spinners

					if percentage >= 70 then
						return string.format(" %%<%s %s %s (%s%%%%) ", success_icon[frame + 1], title, msg, percentage)
					end

					return string.format(" %%<%s %s %s (%s%%%%) ", spinners[frame + 1], title, msg, percentage)
				end

				return ""
			end,
			enabled = is_enabled(80) and view.lsp.progress == true,
			hl = {
				fg = C.rosewater,
				bg = sett.bkg,
			},
		}

		-- general diagnostics (errors, warnings. info and hints)
		components.active[2][2] = {
			provider = "diagnostic_errors",
			enabled = function() return lsp.diagnostics_exist(vim.diagnostic.severity.ERROR) end,

			hl = {
				fg = C.red,
				bg = sett.bkg,
			},
			icon = " " .. assets.lsp.error .. " ",
		}

		components.active[2][3] = {
			provider = "diagnostic_warnings",
			enabled = function() return lsp.diagnostics_exist(vim.diagnostic.severity.WARN) end,
			hl = {
				fg = C.yellow,
				bg = sett.bkg,
			},
			icon = " " .. assets.lsp.warning .. " ",
		}

		components.active[2][4] = {
			provider = "diagnostic_info",
			enabled = function() return lsp.diagnostics_exist(vim.diagnostic.severity.INFO) end,
			hl = {
				fg = C.sky,
				bg = sett.bkg,
			},
			icon = " " .. assets.lsp.info .. " ",
		}

		components.active[2][5] = {
			provider = "diagnostic_hints",
			enabled = function() return lsp.diagnostics_exist(vim.diagnostic.severity.HINT) end,
			hl = {
				fg = C.rosewater,
				bg = sett.bkg,
			},
			icon = " " .. assets.lsp.hint .. " ",
		}
		-- Diagnostics ------>

		-- ######## Center

		-- ######## Right

		components.active[3][1] = {
			provider = "git_branch",
			enabled = is_enabled(70),
			hl = {
				fg = sett.extras,
				bg = sett.bkg,
			},
			icon = assets.git.branch .. " ",
			right_sep = invi_sep,
		}

		components.active[3][2] = {
			provider = function()
				local active_clients = vim.lsp.get_clients { bufnr = 0 }

				-- show an indicator that we have running lsps
				if view.lsp.name == false and next(active_clients) ~= nil then
					return assets.lsp.server .. " " .. "Lsp"
				end

				-- show the actual name of the running lsps
				local index = 0
				local lsp_names = ""
				for _, lsp_config in ipairs(active_clients) do
					if is_lsp_in_excluded_list(lsp_config.name) then goto continue end

					index = index + 1
					if index == 1 then
						lsp_names = assets.lsp.server .. " " .. lsp_config.name
					else
						lsp_names = lsp_names .. view.lsp.separator .. lsp_config.name
					end

					::continue::
				end

				return lsp_names
			end,

			hl = {
				fg = sett.extras,
				bg = sett.bkg,
			},

			right_sep = invi_sep,
		}

		components.active[3][3] = {
			provider = function()
				local filename = vim.fn.expand "%:t"
				local extension = vim.fn.expand "%:e"
				local present, icons = pcall(require, "nvim-web-devicons")
				local icon = present and icons.get_icon(filename, extension) or assets.file
				return (sett.show_modified and "%m" or "") .. " " .. icon .. " " .. filename .. " "
			end,
			enabled = is_enabled(70),
			hl = {
				fg = sett.text,
				bg = sett.curr_file,
			},
			left_sep = {
				str = assets.left_separator,
				hl = {
					fg = sett.curr_file,
					bg = sett.bkg,
				},
			},
		}

		components.active[3][4] = {
			provider = function()
				local dir_name = vim.fn.fnamemodify(vim.fn.getcwd(), ":t")
				return " " .. assets.dir .. " " .. dir_name .. " "
			end,
			enabled = is_enabled(80),
			hl = {
				fg = sett.text,
				bg = sett.curr_dir,
			},
			left_sep = {
				str = assets.left_separator,
				hl = {
					fg = sett.curr_dir,
					bg = sett.curr_file,
				},
			},
		}
		-- ######## Right

		-- Inanctive components
		components.inactive[1][1] = {
			provider = function() return " " .. string.upper(vim.bo.ft) .. " " end,
			hl = {
				fg = C.overlay2,
				bg = C.mantle,
			},
		}

		return components
	end
end
return M
