package solutions.tretter.githugandroid

/**
 * Port of the upstream ruby-githug `rebase` level.
 *
 * Setup documents the repository shape the learner explores. Evaluation is kept
 * state-based whenever the exercise changes repository objects; answer-only
 * levels intentionally validate the answer entered at the prompt.
 */
internal fun rebaseLevel(): Level = level(
    id = "rebase",
    title = "Rebase",
    description = "We are using a git rebase workflow and the feature branch is ready to go into master. Let's rebase the feature branch onto our master branch.",
    hints = listOf("You want to research the `git rebase` command"),
    commandSuggestions = listOf("git checkout feature", "git rebase master"),
    setup = { RepoState(initialized = true, headBranch = "master", branches = mapOf("master" to 2, "feature" to 2)) },
    nativeSetup = {
        resetFiles()
        write("README", "readme\n")
        addCommit("init commit", "README")
        checkoutNew("feature")
        write("feature", "feature\n")
        addCommit("add feature", "feature")
        checkout("master")
        append("README", "content\n")
        addCommit("add content", "README")
        true
    },
    validator = repoPredicate { repo ->
        repo.headBranch == "feature" &&
            repo.commits.take(3).map { it.message } == listOf("add feature", "add content", "init commit")
    },
    testCases = listOf(
        levelTestCase("checkout feature then rebase", "git checkout feature", "git rebase master"),
        levelTestCase("rebase named branch", "git rebase master feature"),
    ),
)