package solutions.tretter.githugandroid

/**
 * Port of the upstream ruby-githug `cherry-pick` 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 cherryPickLevel(): Level = level(
    id = "cherry-pick",
    title = "Cherry Pick",
    description = "Your new feature isn't worth the time and you're going to delete it. But it has one commit that fills in `README` file, and you want this commit to be on the master as well.",
    hints = listOf("Sneak a peek at the `git help cherry-pick` command."),
    commandSuggestions = listOf("git log --oneline new-feature", "git cherry-pick new-feature"),
    setup = { RepoState(initialized = true, files = listOf(GitFile("nokia.js", tracked = true)), commits = listOf(CommitNode("1", "Added fancy branded output"), CommitNode("2", "Filled in README.md with proper input")), branches = mapOf("master" to 1, "new-feature" to 2)) },
    validator = repoPredicate { repo ->
        repo.files.any { it.name == "README.md" && it.tracked } &&
            repo.headBranch == "master" &&
            repo.commits.take(2).map { it.message } == listOf("Filled in README.md with proper input", "Added fancy branded output")
    },
    nativeSetup = {
        resetFiles()
        write("nokia.js", "console.log('Nokia tune')\n")
        addCommit("Added fancy branded output", "nokia.js")
        checkoutNew("new-feature")
        write("README.md", "Proper input instructions\n")
        addCommit("Filled in README.md with proper input", "README.md")
        checkout("master")
        git("branch", "-f", "feature", "new-feature")
        true
    },
    testCases = listOf(
        levelTestCase("cherry pick new feature tip", "git cherry-pick new-feature"),
        levelTestCase("cherry pick feature alias", "git cherry-pick feature"),
    ),
)