-- =============================================================================
-- git.lua — Git 集成
-- =============================================================================

return {

    -- gitsigns: 行内 diff 标记
    {
        "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)
            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,
    },

    -- diffview: Git diff 视图
    {
        "sindrets/diffview.nvim",
        cmd = "DiffviewOpen",
        keys = {
            { "<leader>go", "<cmd>DiffviewOpen<cr>", desc = "查看改动" },
            { "<leader>gq", "<cmd>DiffviewClose<cr>", desc = "关闭 diff" },
            { "<leader>gl", "<cmd>DiffviewFileHistory %<cr>", desc = "文件历史" },
        },
        opts = {
            file_panel = {
                listing_style = "tree",
                tree_options = {
                    flatten_dirs = true,
                    folder_statuses = "only_folded",
                },
            },
            keymaps = {
                view = {
                    { "n", "<leader>q", "<cmd>DiffviewClose<cr>", { desc = "关闭 diffview" } },
                },
                file_panel = {
                    { "n", "<leader>q", "<cmd>DiffviewClose<cr>", { desc = "关闭 diffview" } },
                },
            },
        },
    },

    -- lazygit: Git TUI
    {
        "kdheepak/lazygit.nvim",
        cmd = { "LazyGit", "LazyGitCurrentFile" },
        keys = {
            { "<leader>gg", ":LazyGit<CR>", desc = "LazyGit" },
        },
        dependencies = { "nvim-lua/plenary.nvim" },
    },
}