local t = require("test")
local cmd = require("git.cmd")

t.test("parse_args splits on whitespace", function()
    t.eq(
        cmd.parse_args("config user.name value"),
        { "config", "user.name", "value" }
    )
end)

t.test("parse_args preserves spaces inside double quotes", function()
    t.eq(
        cmd.parse_args([[config user.name "Oscar Wallberg"]]),
        { "config", "user.name", "Oscar Wallberg" }
    )
end)

t.test("parse_args preserves spaces inside single quotes", function()
    t.eq(
        cmd.parse_args([[log --grep='bug fix' --author=Oscar]]),
        { "log", "--grep=bug fix", "--author=Oscar" }
    )
end)

t.test("parse_args handles backslash-escaped space", function()
    t.eq(cmd.parse_args([[a\ b c]]), { "a b", "c" })
end)

t.test("parse_args handles escaped quote inside double quotes", function()
    t.eq(cmd.parse_args([["a\"b" c]]), { 'a"b', "c" })
end)

t.test(
    "parse_args treats backslash literally inside single quotes",
    function()
        t.eq(cmd.parse_args([['a\b' c]]), { "a\\b", "c" })
    end
)

t.test("parse_args concatenates adjacent quoted segments", function()
    t.eq(cmd.parse_args([[foo"bar"baz]]), { "foobarbaz" })
end)

t.test("parse_args handles tabs as separators", function()
    t.eq(cmd.parse_args("a\tb\tc"), { "a", "b", "c" })
end)

t.test("parse_args returns empty list for empty or whitespace input", function()
    t.eq(cmd.parse_args(""), {})
    t.eq(cmd.parse_args("   \t  "), {})
end)

t.test("parse_args preserves empty quoted token", function()
    t.eq(cmd.parse_args([[a "" b]]), { "a", "", "b" })
end)

t.test("parse_args expands %% on unquoted token", function()
    local buf = vim.api.nvim_create_buf(false, false)
    t.defer(function()
        pcall(vim.api.nvim_buf_delete, buf, { force = true })
    end)
    vim.api.nvim_buf_set_name(buf, vim.fn.getcwd() .. "/some-file.lua")
    vim.api.nvim_set_current_buf(buf)

    t.eq(
        cmd.parse_args("add %"),
        { "add", vim.fn.getcwd() .. "/some-file.lua" }
    )
end)

t.test("parse_args does not expand %% inside double quotes", function()
    local buf = vim.api.nvim_create_buf(false, false)
    t.defer(function()
        pcall(vim.api.nvim_buf_delete, buf, { force = true })
    end)
    vim.api.nvim_buf_set_name(buf, vim.fn.getcwd() .. "/some-file.lua")
    vim.api.nvim_set_current_buf(buf)

    t.eq(cmd.parse_args([[log -- "%"]]), { "log", "--", "%" })
end)

t.test("parse_args does not expand %% inside single quotes", function()
    local buf = vim.api.nvim_create_buf(false, false)
    t.defer(function()
        pcall(vim.api.nvim_buf_delete, buf, { force = true })
    end)
    vim.api.nvim_buf_set_name(buf, vim.fn.getcwd() .. "/some-file.lua")
    vim.api.nvim_set_current_buf(buf)

    t.eq(cmd.parse_args([[log -- '%']]), { "log", "--", "%" })
end)

t.test("parse_args does not treat mid-token tilde as expansion", function()
    t.eq(cmd.parse_args("checkout HEAD~3"), { "checkout", "HEAD~3" })
end)

t.test("parse_args expands leading ~/ to home", function()
    t.eq(cmd.parse_args("add ~/foo"), { "add", vim.fn.expand("~/foo") })
end)