package solutions.tretter.githugandroid

/**
 * Port of the upstream ruby-githug `branch_at` 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 branchAtLevel(): Level = level(
    id = "branch_at",
    title = "Branch At",
    description = "You forgot to branch at the previous commit and made a commit on top of it. Create the branch test_branch at the commit before the last.",
    hints = listOf("Just like creating a branch, but you have to pass an extra argument."),
    commandSuggestions = listOf("git branch test_branch HEAD~1"),
    setup = { RepoState(initialized = true, commits = listOf(CommitNode("1", "Adding file1"), CommitNode("2", "Updating file1"), CommitNode("3", "Updating file1 again")), branches = mapOf("master" to 3)) },
    nativeSetup = {
        resetFiles()
        write("file1")
        addCommit("Adding file1", "file1")
        write("file1", "content")
        addCommit("Updating file1", "file1")
        append("file1", "\nAdding some more text")
        addCommit("Updating file1 again", "file1")
        true
    },
    validator = repoPredicate { repo -> repo.branches["test_branch"] == 2 },
    testCases = listOf(
        levelTestCase("branch at previous commit", "git branch test_branch HEAD~1"),
        levelTestCase("branch at caret", "git branch test_branch HEAD^"),
        levelTestCase("branch at explicit master parent", "git branch test_branch master^"),
    ),
)