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import config
import test.framework
import sys.env

fn make_defaults(): config.Defaults
    return config.Defaults {
        repos_root:    "/home/u/repos",
        backup_root:   "/nfs/repos",
        logdir:        "/home/u/.local/state/repoman",
        incus_project: "repoman",
        default_image: "images:ubuntu/26.04/cloud",
        profiles:      ["default", "claude-share"]
    }
end make_defaults

fn empty_override(): config.Override
    return config.Override {
        image:        "",
        profiles:     new [string](0),
        has_profiles: false,
        mounts:       new [config.Mount](0),
        env_keys:     new [string](0),
        env_values:   new [string](0)
    }
end empty_override

proc main()
    let runner = new framework.TestRunner()
    // Pin HOME so paths.expand_home is deterministic across environments.
    env.set_env("HOME", "/home/test")
    let d = make_defaults()

    // 1. flag wins over override and defaults
    mut ov1: config.Override = empty_override()
    ov1.image = "images:debian/12/cloud"
    let e1 = config.merge_with_defaults("isurus", "isurus-project", "images:custom/x", ov1, d)
    runner.assert_eq_string(e1.image, "images:custom/x", "flag wins")
    runner.assert_eq_string(e1.repo_path, "/home/u/repos/isurus-project", "repo_path computed")

    // 2. override.image wins over defaults when no flag
    let e2 = config.merge_with_defaults("isurus", "isurus-project", "", ov1, d)
    runner.assert_eq_string(e2.image, "images:debian/12/cloud", "override.image wins")

    // 3. defaults when no flag, no override.image
    let e3 = config.merge_with_defaults("isurus", "isurus-project", "", empty_override(), d)
    runner.assert_eq_string(e3.image, "images:ubuntu/26.04/cloud", "defaults.image wins")

    // 4. profiles: override replaces defaults when has_profiles
    mut ov2: config.Override = empty_override()
    ov2.profiles = ["default", "claude-share", "node-dev"]
    ov2.has_profiles = true
    let e4 = config.merge_with_defaults("isurus", "isurus-project", "", ov2, d)
    runner.assert_eq_int(e4.profiles.length(), 3, "override profiles count")
    runner.assert_eq_string(e4.profiles[2], "node-dev", "override profiles[2]")

    // 5. profiles fall back to defaults
    let e5 = config.merge_with_defaults("isurus", "isurus-project", "", empty_override(), d)
    runner.assert_eq_int(e5.profiles.length(), 2, "defaults profiles count")

    // 6. mounts: auto bind always present, override appended
    mut m1: [config.Mount] = new [config.Mount](1)
    m1[0] = config.Mount { source: "~/.npm", path: "/home/u/.npm" }
    mut ov3: config.Override = empty_override()
    ov3.mounts = m1
    let e6 = config.merge_with_defaults("isurus", "isurus-project", "", ov3, d)
    runner.assert_eq_int(e6.mounts.length(), 2, "auto bind + 1 override mount")
    runner.assert_eq_string(e6.mounts[0].source, "/home/u/repos/isurus-project", "auto bind source")
    runner.assert_eq_string(e6.mounts[0].path, "/home/u/repos/isurus-project", "auto bind dest")
    runner.assert_eq_string(e6.mounts[1].source, "/home/test/.npm", "override mount expanded")

    // 7. env: passed through
    mut keys: [string] = ["NODE_ENV"]
    mut vals: [string] = ["development"]
    mut ov4: config.Override = empty_override()
    ov4.env_keys = keys
    ov4.env_values = vals
    let e7 = config.merge_with_defaults("isurus", "isurus-project", "", ov4, d)
    runner.assert_eq_int(e7.env_keys.length(), 1, "env_keys count")
    runner.assert_eq_string(e7.env_keys[0], "NODE_ENV", "env_keys[0]")
    runner.assert_eq_string(e7.env_values[0], "development", "env_values[0]")

    runner.report()
end main