-- ============================================================================
-- Git 集成 (gitsigns)
-- 行内 diff 标记 + hunk 操作
-- ============================================================================

return {
    {
        "lewis6991/gitsigns.nvim",
        event = "BufReadPre",
        opts = {
            signs = {
                add          = { text = "▍" },
                change       = { text = "▍" },
                delete       = { text = "▍" },
                topdelete    = { text = "▍" },
                changedelete = { text = "▍" },
            },
            on_attach = function(bufnr)
                local gs = require("gitsigns")

                -- 导航
                vim.keymap.set("n", "]h", function() gs.nav_hunk("next") end, { buffer = bufnr, desc = "下一个修改块" })
                vim.keymap.set("n", "[h", function() gs.nav_hunk("prev") end, { buffer = bufnr, desc = "上一个修改块" })

                -- Hunk 操作
                vim.keymap.set("n", "<leader>hs", gs.stage_hunk,   { buffer = bufnr, desc = "暂存修改块" })
                vim.keymap.set("n", "<leader>hr", gs.reset_hunk,   { buffer = bufnr, desc = "撤销修改块" })
                vim.keymap.set("n", "<leader>hp", gs.preview_hunk, { buffer = bufnr, desc = "预览修改块" })

                -- 文件操作
                vim.keymap.set("n", "<leader>hS", gs.stage_buffer,  { buffer = bufnr, desc = "暂存文件" })
                vim.keymap.set("n", "<leader>hR", gs.reset_buffer,  { buffer = bufnr, desc = "撤销文件修改" })

                -- Blame
                vim.keymap.set("n", "<leader>hb", gs.blame_line,                { buffer = bufnr, desc = "查看行 blame" })
                vim.keymap.set("n", "<leader>hl", gs.toggle_current_line_blame, { buffer = bufnr, desc = "切换行 blame" })

                -- 其他
                vim.keymap.set("n", "<leader>hw", gs.setqflist,           { buffer = bufnr, desc = "列出所有 hunk" })
                vim.keymap.set("n", "<leader>hd", gs.toggle_word_diff,    { buffer = bufnr, desc = "切换行内 diff" })
            end,
        },
        config = function(_, opts)
            require("gitsigns").setup(opts)
            -- 自定义颜色
            vim.api.nvim_set_hl(0, "GitSignsAdd",    { fg = "#4CAF50" })
            vim.api.nvim_set_hl(0, "GitSignsChange", { fg = "#2196F3" })
            vim.api.nvim_set_hl(0, "GitSignsDelete", { fg = "#F44336" })
        end,
    },
}