-- ── plugins/ui.lua ────────────────────────────────────────────────────────────
return {

    -- ── Colorscheme: Kanagawa Wave (desktop) / habamax (mobile) ───────────────
    -- kanagawa requires termguicolors which Termius mangles as purple.
    -- habamax is built-in, renders cleanly in 256-color (retrobox caused
    -- redraw corruption on Termius, habamax does not).
    {
        "rebelot/kanagawa.nvim",
        priority = 1000,
        config = function()
            if vim.env.MOBILE == "1" then
                vim.cmd("colorscheme habamax")
                return
            end
            require("kanagawa").setup({
                compile   = true,
                undercurl = true,
                theme     = "wave",
                background = {
                    dark  = "wave",
                    light = "lotus",
                },
                colors = {
                    theme = {
                        wave = {
                            ui = {
                                bg_gutter = "none",
                            },
                        },
                    },
                },
                overrides = function(colors)
                    local theme = colors.theme
                    return {
                        Pmenu      = { fg = theme.ui.shade0, bg = theme.ui.bg_p1 },
                        PmenuSbar  = { bg = theme.ui.bg_m1 },
                        PmenuThumb = { bg = theme.ui.bg_p2 },
                        CursorLine = { bg = theme.ui.bg_p1 },
                    }
                end,
            })
            vim.cmd("colorscheme kanagawa-wave")
        end,
    },

    -- ── Statusline: lualine ───────────────────────────────────────────────────
    -- theme = "auto" derives from active colorscheme — works for both
    -- kanagawa (desktop) and habamax (mobile) without hex colors
    {
        "nvim-lualine/lualine.nvim",
        dependencies = { "nvim-tree/nvim-web-devicons" },
        config = function()
            require("lualine").setup({
                options = {
                    theme                = "auto",
                    component_separators = { left = "│", right = "│" },
                    section_separators   = { left = "", right = "" },
                    globalstatus         = true,
                },
                sections = {
                    lualine_a = { { "mode", icon = "" } },
                    lualine_b = {
                        { "branch",   icon = "" },
                        { "diff",
                            symbols = { added = " ", modified = " ", removed = " " },
                        },
                    },
                    lualine_c = {
                        { "filename", path = 1, symbols = { modified = "●", readonly = "" } },
                    },
                    lualine_x = {
                        { "diagnostics",
                            symbols = { error = " ", warn = " ", info = " ", hint = "󰌵 " },
                        },
                        "filetype",
                    },
                    lualine_y = { "progress" },
                    lualine_z = { { "location", icon = "" } },
                },
            })
        end,
    },

    -- ── Bufferline (desktop only) ─────────────────────────────────────────────
    -- Renders truecolor backgrounds for tabs which Termius shows as purple bars.
    {
        "akinsho/bufferline.nvim",
        enabled = function() return vim.env.MOBILE ~= "1" end,
        dependencies = { "nvim-tree/nvim-web-devicons" },
        config = function()
            require("bufferline").setup({
                options = {
                    mode              = "buffers",
                    separator_style   = "slant",
                    show_close_icon   = false,
                    show_buffer_close_icons = false,
                    diagnostics       = "nvim_lsp",
                    diagnostics_indicator = function(_, _, diag)
                        local icons = { error = " ", warning = " " }
                        local ret = (diag.error and icons.error .. diag.error .. " " or "")
                            .. (diag.warning and icons.warning .. diag.warning or "")
                        return vim.trim(ret)
                    end,
                    offsets = {
                        { filetype = "oil", text = "File Explorer", separator = true },
                    },
                },
            })
        end,
    },

    -- ── File explorer: oil.nvim ───────────────────────────────────────────────
    -- Edit the filesystem like a buffer. Very Arch: does one thing, perfectly.
    {
        "stevearc/oil.nvim",
        dependencies = { "nvim-tree/nvim-web-devicons" },
        config = function()
            require("oil").setup({
                default_file_explorer = true,
                columns = {
                    "icon",
                    "permissions",
                    "size",
                    "mtime",
                },
                view_options = {
                    show_hidden = true,
                },
                keymaps = {
                    ["<C-h>"] = false,      -- don't hijack window nav
                    ["<C-l>"] = false,
                    ["q"]     = "actions.close",
                },
            })
        end,
    },

    -- ── Fuzzy finder: Telescope ───────────────────────────────────────────────
    {
        "nvim-telescope/telescope.nvim",
        dependencies = {
            "nvim-lua/plenary.nvim",
            -- Native FZF sorter — faster than the lua one
            { "nvim-telescope/telescope-fzf-native.nvim", build = "make" },
        },
        config = function()
            local telescope = require("telescope")
            local actions   = require("telescope.actions")

            telescope.setup({
                defaults = {
                    prompt_prefix   = "❯ ",
                    selection_caret = "▶ ",
                    -- Kanagawa-inspired layout
                    layout_strategy = "horizontal",
                    layout_config   = { prompt_position = "top", width = 0.9 },
                    sorting_strategy = "ascending",
                    mappings = {
                        i = {
                            ["<Esc>"] = actions.close,
                            ["<C-j>"] = actions.move_selection_next,
                            ["<C-k>"] = actions.move_selection_previous,
                        },
                    },
                },
            })

            telescope.load_extension("fzf")
        end,
    },

    -- ── Which-key ─────────────────────────────────────────────────────────────
    {
        "folke/which-key.nvim",
        event = "VeryLazy",
        config = function()
            require("which-key").setup({
                preset = "modern",
                delay  = 400,
                icons  = { separator = "→" },
            })
        end,
    },

    -- ── Git signs in gutter ───────────────────────────────────────────────────
    {
        "lewis6991/gitsigns.nvim",
        config = function()
            require("gitsigns").setup({
                signs = {
                    add          = { text = "▎" },
                    change       = { text = "▎" },
                    delete       = { text = "" },
                    topdelete    = { text = "" },
                    changedelete = { text = "▎" },
                    untracked    = { text = "▎" },
                },
                on_attach = function(buf)
                    local gs = require("gitsigns")
                    local m  = function(k, fn, d)
                        vim.keymap.set("n", k, fn, { buffer = buf, desc = d })
                    end
                    m("]c", gs.next_hunk,        "Next hunk")
                    m("[c", gs.prev_hunk,        "Prev hunk")
                    m("<leader>hs", gs.stage_hunk,   "Stage hunk")
                    m("<leader>hr", gs.reset_hunk,   "Reset hunk")
                    m("<leader>hp", gs.preview_hunk, "Preview hunk")
                    m("<leader>hb", gs.blame_line,   "Blame line")
                end,
            })
        end,
    },

    -- ── Indent guides ─────────────────────────────────────────────────────────
    {
        "lukas-reineke/indent-blankline.nvim",
        main = "ibl",
        config = function()
            require("ibl").setup({
                indent  = { char = "│" },
                scope   = { char = "│" },
            })
            -- Link to existing highlight groups instead of hex (mobile-safe)
            vim.cmd("hi! link IblIndent Comment")
            vim.cmd("hi! link IblScope  LineNr")
        end,
    },


    -- ── Dashboard ─────────────────────────────────────────────────────────────
    {
        "goolord/alpha-nvim",
        event = "VimEnter",
        config = function()
            local alpha   = require("alpha")
            local dashboard = require("alpha.themes.dashboard")

            -- Mobile-friendly ASCII (heavy blocks render as red bars in Termius)
            dashboard.section.header.val = {
                "                                                     ",
                "    ┌─┐┬─┐┌─┐┬ ┬   ┌┬┐┌─┐┬  ┬                       ",
                "    ├─┤├┬┘│  ├─┤───│││├┤ └┐┌┘                       ",
                "    ┴ ┴┴└─└─┘┴ ┴   ─┴┘└─┘  └┘                        ",
                "                                                     ",
                "          riced neovim ide · arch linux · v1.7        ",
            }

            dashboard.section.buttons.val = {
                dashboard.button("f", "  Find file",    "<cmd>Telescope find_files<cr>"),
                dashboard.button("r", "  Recent files", "<cmd>Telescope oldfiles<cr>"),
                dashboard.button("g", "  Live grep",    "<cmd>Telescope live_grep<cr>"),
                dashboard.button("e", "  Explorer",     "<cmd>Oil<cr>"),
                dashboard.button("l", "  Lazy",         "<cmd>Lazy<cr>"),
                dashboard.button("q", "  Quit",         "<cmd>qa<cr>"),
            }

            dashboard.section.header.opts.hl = "Comment"
            dashboard.section.footer.opts.hl = "NonText"

            alpha.setup(dashboard.opts)
        end,
    },

    -- ── Smooth scrolling ──────────────────────────────────────────────────────
    {
        "karb94/neoscroll.nvim",
        config = function()
            require("neoscroll").setup({ mappings = { "<C-u>","<C-d>","<C-b>","<C-f>" } })
        end,
    },

    -- ── Color previews inline (desktop only) ──────────────────────────────────
    -- Renders hex as RGB which Termius mangles. Skip on mobile.
    {
        "NvChad/nvim-colorizer.lua",
        enabled = function() return vim.env.MOBILE ~= "1" end,
        config = function()
            require("colorizer").setup({ "*" }, { mode = "virtualtext" })
        end,
    },

    -- Web devicons (used everywhere)
    { "nvim-tree/nvim-web-devicons", lazy = true },
}