package solutions.tretter.githugandroid

/**
 * Port of the upstream ruby-githug `checkout_file` 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 checkoutFileLevel(): Level = level(
    id = "checkout_file",
    title = "Checkout File",
    description = "A file has been modified, but you don't want to keep the modification. Checkout the `config.rb` file from the last commit.",
    hints = listOf("You will need to do some research on the checkout command for this one."),
    commandSuggestions = listOf("git checkout -- config.rb"),
    setup = { RepoState(initialized = true, files = listOf(GitFile("config.rb", "This is the initial config file\nThese are changes you don't want to keep!", tracked = true)), commits = listOf(CommitNode("0000001", "Added initial config file")), branches = mapOf("master" to 1)) },
    nativeSetup = {
        resetFiles()
        write("config.rb", "This is the initial config file")
        addCommit("Added initial config file", "config.rb")
        append("config.rb", "\nThese are changes you don't want to keep!")
        true
    },
    validator = repoPredicate { repo -> repo.files.find { it.name == "config.rb" }?.content == "This is the initial config file" },
    testCases = listOf(
        levelTestCase("checkout file from head", "git checkout -- config.rb"),
        levelTestCase("restore file from index", "git restore config.rb"),
        levelTestCase("checkout file from explicit head", "git checkout HEAD -- config.rb"),
    ),
)