use proxywarden_lib::component_detection::{
    proxyfier_component_from_inventory, singbox_component_from_inventory,
};
use proxywarden_lib::component_inventory::{
    authorize_component_action, classify_component_candidates,
    component_inventory_fingerprint_for_cutover, legacy_proxifyre_topshelf_path_matches,
    prove_legacy_cutover, BinaryIdentityEvidence, CandidateRole, ComponentCandidateProbe,
    ComponentClassification, InventoryAction, InventoryIssue, LegacyCutoverEvidence,
    LegacyCutoverProof, LegacyProxifyreScmProfile, MarkerEvidence, ServiceEvidence,
    AMBIGUOUS_LEGACY, MANUAL_MIGRATION_REQUIRED, OWNERSHIP_MISMATCH,
};
use proxywarden_lib::component_status::resolve_component_statuses_with_inventories;
use proxywarden_lib::models::{ComponentId, ComponentState};
use std::path::{Path, PathBuf};

#[test]
fn managed_current_requires_marker_files_and_exact_service_path() {
    let root = PathBuf::from(r"C:\Program Files\ProxyWarden\components\ProxiFyre");
    let inventory = classify_component_candidates(
        ComponentId::Proxyfier,
        vec![probe(
            ComponentId::Proxyfier,
            CandidateRole::Current,
            &root,
            true,
            MarkerEvidence::Valid,
            BinaryIdentityEvidence::Unknown,
            Some(service(&root.join("ProxiFyre.exe"), true)),
        )],
    );

    assert_eq!(
        inventory.classification(),
        ComponentClassification::ManagedCurrent
    );
    assert_eq!(
        inventory
            .selected_candidate()
            .expect("selected current")
            .binary_version,
        Some("2.4.0.0".to_string())
    );
}

#[test]
fn same_service_name_with_foreign_path_is_ownership_mismatch() {
    let root = PathBuf::from(r"C:\Program Files\ProxyWarden\components\ProxiFyre");
    let inventory = classify_component_candidates(
        ComponentId::Proxyfier,
        vec![probe(
            ComponentId::Proxyfier,
            CandidateRole::Current,
            &root,
            true,
            MarkerEvidence::Valid,
            BinaryIdentityEvidence::KnownPackage,
            Some(service(
                PathBuf::from(r"C:\Foreign\ProxiFyre.exe").as_path(),
                false,
            )),
        )],
    );

    let candidate = inventory
        .selected_candidate()
        .expect("foreign current candidate");
    assert_eq!(candidate.classification, ComponentClassification::Foreign);
    assert_eq!(candidate.issues[0].code, OWNERSHIP_MISMATCH);
}

#[test]
fn tools_proxifyre_is_legacy_and_never_current() {
    let root = PathBuf::from(r"C:\Tools\ProxiFyre");
    let inventory = classify_component_candidates(
        ComponentId::Proxyfier,
        vec![probe(
            ComponentId::Proxyfier,
            CandidateRole::Legacy,
            &root,
            false,
            MarkerEvidence::NotRequired,
            BinaryIdentityEvidence::KnownPackage,
            Some(service(&root.join("ProxiFyre.exe"), true)),
        )],
    );

    assert_eq!(
        inventory.classification(),
        ComponentClassification::ManagedLegacy
    );
    let component = proxyfier_component_from_inventory(&inventory);
    assert_eq!(component.actions, vec!["Перенести ProxiFyre"]);
    assert!(component
        .problems
        .iter()
        .any(|problem| problem.contains("явного переноса")));
}

#[test]
fn bare_singbox_root_stays_foreign_without_complete_identity() {
    let root = PathBuf::from(r"C:\Program Files\sing-box");
    let mut candidate = probe(
        ComponentId::Singbox,
        CandidateRole::ForeignByDefault,
        &root,
        false,
        MarkerEvidence::NotRequired,
        BinaryIdentityEvidence::Unknown,
        Some(service(&root.join("ProxyWardenSingBox.exe"), true)),
    );
    candidate.legacy_identity_complete = false;
    let inventory = classify_component_candidates(ComponentId::Singbox, vec![candidate]);

    assert_eq!(inventory.classification(), ComponentClassification::Foreign);
}

#[test]
fn current_root_without_required_marker_is_incomplete() {
    let root = PathBuf::from(r"C:\Program Files\ProxyWarden\components\ProxiFyre");
    let inventory = classify_component_candidates(
        ComponentId::Proxyfier,
        vec![probe(
            ComponentId::Proxyfier,
            CandidateRole::Current,
            &root,
            true,
            MarkerEvidence::Missing,
            BinaryIdentityEvidence::KnownPackage,
            Some(service(&root.join("ProxiFyre.exe"), true)),
        )],
    );

    assert_eq!(
        inventory.classification(),
        ComponentClassification::Incomplete
    );
}

#[test]
fn startup_status_preserves_foreign_and_incomplete_inventory_errors() {
    let proxyfier_root = PathBuf::from(r"C:\Program Files\ProxyWarden\components\ProxiFyre");
    let foreign_proxyfier = classify_component_candidates(
        ComponentId::Proxyfier,
        vec![probe(
            ComponentId::Proxyfier,
            CandidateRole::Current,
            &proxyfier_root,
            true,
            MarkerEvidence::Valid,
            BinaryIdentityEvidence::KnownPackage,
            Some(service(
                PathBuf::from(r"C:\Foreign\ProxiFyre.exe").as_path(),
                false,
            )),
        )],
    );
    let singbox_root = PathBuf::from(r"C:\Program Files\ProxyWarden\components\sing-box");
    let mut incomplete_singbox_probe = probe(
        ComponentId::Singbox,
        CandidateRole::Current,
        &singbox_root,
        false,
        MarkerEvidence::NotRequired,
        BinaryIdentityEvidence::KnownPackage,
        Some(service(&singbox_root.join("ProxyWardenSingBox.exe"), true)),
    );
    incomplete_singbox_probe
        .missing_files
        .push(singbox_root.join("ProxyWardenSingBox.xml"));
    let incomplete_singbox =
        classify_component_candidates(ComponentId::Singbox, vec![incomplete_singbox_probe]);

    let statuses =
        resolve_component_statuses_with_inventories(&foreign_proxyfier, &incomplete_singbox);
    let proxyfier = statuses
        .iter()
        .find(|status| status.id == ComponentId::Proxyfier)
        .expect("ProxiFyre status");
    let singbox = statuses
        .iter()
        .find(|status| status.id == ComponentId::Singbox)
        .expect("sing-box status");

    assert_eq!(proxyfier.state, ComponentState::Error);
    assert_eq!(singbox.state, ComponentState::Error);
    assert!(!proxyfier.problems.is_empty());
    assert!(!singbox.problems.is_empty());
}

#[test]
fn current_candidate_wins_but_legacy_remains_visible() {
    let current_root = PathBuf::from(r"C:\Program Files\ProxyWarden\components\ProxiFyre");
    let legacy_root = PathBuf::from(r"C:\Tools\ProxiFyre");
    let inventory = classify_component_candidates(
        ComponentId::Proxyfier,
        vec![
            probe(
                ComponentId::Proxyfier,
                CandidateRole::Legacy,
                &legacy_root,
                false,
                MarkerEvidence::NotRequired,
                BinaryIdentityEvidence::KnownPackage,
                Some(service(&legacy_root.join("ProxiFyre.exe"), true)),
            ),
            probe(
                ComponentId::Proxyfier,
                CandidateRole::Current,
                &current_root,
                true,
                MarkerEvidence::Valid,
                BinaryIdentityEvidence::KnownPackage,
                Some(service(&current_root.join("ProxiFyre.exe"), true)),
            ),
        ],
    );

    assert_eq!(inventory.candidates.len(), 2);
    assert_eq!(
        inventory.classification(),
        ComponentClassification::ManagedCurrent
    );
    assert_eq!(
        inventory
            .selected_candidate()
            .expect("selected current")
            .root,
        current_root
    );
}

#[test]
fn multiple_managed_legacy_candidates_block_selection() {
    let roots = [
        PathBuf::from(r"C:\Tools\ProxiFyre"),
        PathBuf::from(r"C:\Program Files\ProxiFyre"),
    ];
    let probes = roots
        .iter()
        .map(|root| {
            probe(
                ComponentId::Proxyfier,
                CandidateRole::Legacy,
                root,
                false,
                MarkerEvidence::NotRequired,
                BinaryIdentityEvidence::KnownPackage,
                Some(service(&root.join("ProxiFyre.exe"), true)),
            )
        })
        .collect();
    let inventory = classify_component_candidates(ComponentId::Proxyfier, probes);

    assert!(inventory.selected_candidate().is_none());
    assert_eq!(inventory.issues[0].code, AMBIGUOUS_LEGACY);
}

#[test]
fn reparse_point_is_never_managed() {
    let root = PathBuf::from(r"C:\Program Files\ProxyWarden\components\sing-box");
    let mut candidate = probe(
        ComponentId::Singbox,
        CandidateRole::Current,
        &root,
        false,
        MarkerEvidence::NotRequired,
        BinaryIdentityEvidence::KnownPackage,
        Some(service(&root.join("ProxyWardenSingBox.exe"), true)),
    );
    candidate.has_reparse_point = true;
    let inventory = classify_component_candidates(ComponentId::Singbox, vec![candidate]);

    assert_eq!(inventory.classification(), ComponentClassification::Foreign);
    assert_eq!(
        inventory.selected_candidate().unwrap().issues[0].code,
        OWNERSHIP_MISMATCH
    );
}

#[test]
fn exact_frozen_proxifyre_identity_is_the_only_automatic_cutover() {
    let root = PathBuf::from(r"C:\Tools\ProxiFyre");
    let inventory = legacy_inventory(
        ComponentId::Proxyfier,
        &root,
        "ProxiFyreService",
        &topshelf_path(&root),
        "2.2.1.0",
    );

    let proof = prove_legacy_cutover(&inventory, &exact_cutover_evidence())
        .expect("exact identity must produce an opaque proof");
    assert_eq!(proof.fingerprint().len(), 64);
}

#[test]
fn discovery_evidence_never_substitutes_for_cutover_identity() {
    let auto_root = PathBuf::from(r"C:\Tools\ProxiFyre");
    let cases = [
        legacy_inventory(
            ComponentId::Proxyfier,
            Path::new(r"C:\Program Files\ProxiFyre"),
            "ProxiFyreService",
            &topshelf_path(Path::new(r"C:\Program Files\ProxiFyre")),
            "2.2.1.0",
        ),
        legacy_inventory(
            ComponentId::Proxyfier,
            &auto_root,
            "ProxiFyre",
            &topshelf_path(&auto_root),
            "2.2.1.0",
        ),
        legacy_inventory(
            ComponentId::Proxyfier,
            &auto_root,
            "ProxiFyreService",
            &format!(
                r#""{}" --service"#,
                auto_root.join("ProxiFyre.exe").display()
            ),
            "2.2.1.0",
        ),
        legacy_inventory(
            ComponentId::Proxyfier,
            &auto_root,
            "ProxiFyreService",
            &topshelf_path(&auto_root),
            "2.4.0.0",
        ),
    ];

    for inventory in cases {
        assert_eq!(
            inventory.classification(),
            ComponentClassification::ManagedLegacy
        );
        assert_manual_without_mutation(prove_legacy_cutover(&inventory, &exact_cutover_evidence()));
    }

    let inventory = legacy_inventory(
        ComponentId::Proxyfier,
        &auto_root,
        "ProxiFyreService",
        &topshelf_path(&auto_root),
        "2.2.1.0",
    );
    let mut bad_manifest = exact_cutover_evidence();
    bad_manifest.proxifyre_manifest_matches = false;
    assert_manual_without_mutation(prove_legacy_cutover(&inventory, &bad_manifest));

    let mut bad_snapshot_fingerprint = exact_cutover_evidence();
    bad_snapshot_fingerprint
        .proxifyre_scm_snapshot_fingerprint
        .clear();
    assert_manual_without_mutation(prove_legacy_cutover(&inventory, &bad_snapshot_fingerprint));

    let mut bad_profile = exact_cutover_evidence();
    bad_profile
        .proxifyre_scm_profile
        .as_mut()
        .expect("profile")
        .delayed_auto_start = true;
    assert_manual_without_mutation(prove_legacy_cutover(&inventory, &bad_profile));

    let mut extra_candidate = inventory.clone();
    extra_candidate
        .candidates
        .push(extra_candidate.candidates[0].clone());
    assert_manual_without_mutation(prove_legacy_cutover(
        &extra_candidate,
        &exact_cutover_evidence(),
    ));

    let mut alias_collision = exact_cutover_evidence();
    alias_collision.additional_matching_service = true;
    assert_manual_without_mutation(prove_legacy_cutover(&inventory, &alias_collision));
}

#[test]
fn legacy_singbox_is_always_manual_and_has_zero_mutation_authority() {
    let root = PathBuf::from(r"C:\Program Files\ProxyWarden\sing-box");
    let inventory = legacy_inventory(
        ComponentId::Singbox,
        &root,
        "ProxyWardenSingBox",
        &format!(r#""{}""#, root.join("ProxyWardenSingBox.exe").display()),
        "1.13.19",
    );

    assert_eq!(
        inventory.classification(),
        ComponentClassification::ManagedLegacy
    );
    let component = singbox_component_from_inventory(&inventory);
    assert!(component.actions.is_empty());
    assert!(component
        .problems
        .iter()
        .any(|problem| problem.contains("ручного переноса")));
    assert_manual_without_mutation(prove_legacy_cutover(&inventory, &exact_cutover_evidence()));
}

#[test]
fn generic_inventory_authorization_never_grants_cutover() {
    let root = PathBuf::from(r"C:\Tools\ProxiFyre");
    let inventory = legacy_inventory(
        ComponentId::Proxyfier,
        &root,
        "ProxiFyreService",
        &topshelf_path(&root),
        "2.2.1.0",
    );

    let error = authorize_component_action(&inventory, InventoryAction::Cutover)
        .expect_err("generic lifecycle authorization must not grant cutover");
    assert_eq!(error.code, "legacy_cutover_required");
    let mut current = inventory.clone();
    current.candidates[0].classification = ComponentClassification::ManagedCurrent;
    let missing =
        proxywarden_lib::component_inventory::ComponentInventory::missing(ComponentId::Proxyfier);
    for inventory in [&current, &missing] {
        assert!(authorize_component_action(inventory, InventoryAction::Cutover).is_err());
    }
    prove_legacy_cutover(&inventory, &exact_cutover_evidence())
        .expect("strict gate remains the only proof constructor");
}

#[test]
fn generic_inventory_authorization_never_writes_legacy_runtime_config() {
    let root = PathBuf::from(r"C:\Tools\ProxiFyre");
    let inventory = legacy_inventory(
        ComponentId::Proxyfier,
        &root,
        "ProxiFyreService",
        &topshelf_path(&root),
        "2.2.1.0",
    );

    for action in [
        InventoryAction::Apply,
        InventoryAction::Start,
        InventoryAction::Stop,
    ] {
        let error = authorize_component_action(&inventory, action)
            .expect_err("legacy runtime actions require explicit cutover");
        assert_eq!(error.code, "legacy_cutover_required");
    }
}

#[test]
fn cutover_inventory_fingerprint_is_stable_and_binds_live_service_state() {
    let root = PathBuf::from(r"C:\Tools\ProxiFyre");
    let inventory = legacy_inventory(
        ComponentId::Proxyfier,
        &root,
        "ProxiFyreService",
        &topshelf_path(&root),
        "2.2.1.0",
    );
    let first = component_inventory_fingerprint_for_cutover(&inventory);
    assert_eq!(
        first,
        component_inventory_fingerprint_for_cutover(&inventory)
    );

    let mut changed = inventory.clone();
    changed.candidates[0]
        .service
        .as_mut()
        .expect("service")
        .status = "running".to_string();
    assert_ne!(first, component_inventory_fingerprint_for_cutover(&changed));
}

#[test]
fn frozen_scm_profile_rejects_each_unsafe_or_unknown_field() {
    let mutations: [fn(&mut LegacyProxifyreScmProfile); 15] = [
        |profile| profile.service_type = 0x20,
        |profile| profile.start_type = 3,
        |profile| profile.error_control = 0,
        |profile| profile.account_name = "NetworkService".to_string(),
        |profile| profile.display_name = "ProxiFyre".to_string(),
        |profile| profile.description.clear(),
        |profile| profile.dependencies.push("Tcpip".to_string()),
        |profile| profile.load_order_group = Some("Network".to_string()),
        |profile| profile.has_failure_actions = true,
        |profile| profile.failure_actions_on_non_crash = true,
        |profile| profile.delayed_auto_start = true,
        |profile| profile.sid_type = 1,
        |profile| {
            profile
                .required_privileges
                .push("SeDebugPrivilege".to_string())
        },
        |profile| profile.has_triggers = true,
        |profile| profile.untrusted_mutation_rights = true,
    ];

    assert!(exact_scm_profile().matches_frozen_2_2_1_profile());
    for mutate in mutations {
        let mut profile = exact_scm_profile();
        mutate(&mut profile);
        assert!(!profile.matches_frozen_2_2_1_profile());
    }
}

#[test]
fn topshelf_cutover_path_is_token_exact_and_pair_order_independent() {
    let executable = Path::new(r"C:\Tools\ProxiFyre\ProxiFyre.exe");
    for path_name in [
        r#""C:\Tools\ProxiFyre\ProxiFyre.exe" -displayname "ProxiFyre Service" -servicename "ProxiFyreService""#,
        r#"C:\Tools\ProxiFyre\ProxiFyre.exe -servicename ProxiFyreService -displayname "ProxiFyre Service""#,
    ] {
        assert!(legacy_proxifyre_topshelf_path_matches(
            path_name, executable
        ));
    }
    for path_name in [
        r#""C:\Tools\ProxiFyre\ProxiFyre.exe" --service"#,
        r#""C:\Tools\ProxiFyre\ProxiFyre.exe" -displayname "ProxiFyre Service" -servicename ProxiFyreService --run"#,
        r#""C:\Tools\ProxiFyre\ProxiFyre.exe" -displayname "Foreign" -servicename ProxiFyreService"#,
        r#""C:\Tools\ProxiFyre\ProxiFyre.exe" -displayname "ProxiFyre Service" -servicename ProxiFyre"#,
        r#""C:\Tools\ProxiFyre\ProxiFyre.exe -displayname "ProxiFyre Service" -servicename ProxiFyreService"#,
    ] {
        assert!(!legacy_proxifyre_topshelf_path_matches(
            path_name, executable
        ));
    }
    assert!(!legacy_proxifyre_topshelf_path_matches(
        r#""C:\Program Files\ProxiFyre\ProxiFyre.exe" -displayname "ProxiFyre Service" -servicename ProxiFyreService"#,
        Path::new(r"C:\Program Files\ProxiFyre\ProxiFyre.exe"),
    ));
}

fn assert_manual_without_mutation(result: Result<LegacyCutoverProof, InventoryIssue>) {
    assert_eq!(
        result
            .expect_err("manual identity must not yield a proof")
            .code,
        MANUAL_MIGRATION_REQUIRED
    );
}

fn exact_cutover_evidence() -> LegacyCutoverEvidence {
    LegacyCutoverEvidence {
        proxifyre_manifest_matches: true,
        proxifyre_scm_profile: Some(exact_scm_profile()),
        proxifyre_scm_snapshot_fingerprint: "9".repeat(64),
        additional_matching_service: false,
    }
}

fn exact_scm_profile() -> LegacyProxifyreScmProfile {
    LegacyProxifyreScmProfile {
        service_type: 0x10,
        start_type: 2,
        error_control: 1,
        account_name: "LocalSystem".to_string(),
        display_name: "ProxiFyre Service".to_string(),
        description: "ProxiFyre - SOCKS5 ProxiFyre Service".to_string(),
        dependencies: Vec::new(),
        load_order_group: None,
        has_failure_actions: false,
        failure_actions_on_non_crash: false,
        delayed_auto_start: false,
        sid_type: 0,
        required_privileges: Vec::new(),
        has_triggers: false,
        untrusted_mutation_rights: false,
    }
}

fn legacy_inventory(
    component_id: ComponentId,
    root: &Path,
    service_name: &str,
    path_name: &str,
    version: &str,
) -> proxywarden_lib::component_inventory::ComponentInventory {
    let executable_name = match component_id {
        ComponentId::Proxyfier => "ProxiFyre.exe",
        ComponentId::Singbox => "sing-box.exe",
        ComponentId::ControlApp => "ProxyWarden.exe",
    };
    let service_executable = match component_id {
        ComponentId::Singbox => root.join("ProxyWardenSingBox.exe"),
        ComponentId::Proxyfier | ComponentId::ControlApp => root.join(executable_name),
    };
    classify_component_candidates(
        component_id.clone(),
        vec![ComponentCandidateProbe {
            component_id,
            role: CandidateRole::Legacy,
            root: root.to_path_buf(),
            root_exists: true,
            has_reparse_point: false,
            executable_path: Some(root.join(executable_name)),
            missing_files: Vec::new(),
            marker: MarkerEvidence::NotRequired,
            marker_required: false,
            binary_identity: BinaryIdentityEvidence::KnownPackage,
            binary_version: Some(version.to_string()),
            service: Some(ServiceEvidence {
                name: service_name.to_string(),
                status: "stopped".to_string(),
                path_name: Some(path_name.to_string()),
                executable_path: Some(service_executable),
                path_matches_candidate: true,
                binary_version: Some(version.to_string()),
            }),
            service_required: true,
            legacy_identity_complete: true,
        }],
    )
}

fn topshelf_path(root: &Path) -> String {
    format!(
        r#""{}" -displayname "ProxiFyre Service" -servicename "ProxiFyreService""#,
        root.join("ProxiFyre.exe").display()
    )
}

fn probe(
    component_id: ComponentId,
    role: CandidateRole,
    root: &Path,
    marker_required: bool,
    marker: MarkerEvidence,
    binary_identity: BinaryIdentityEvidence,
    service: Option<ServiceEvidence>,
) -> ComponentCandidateProbe {
    let executable_name = match component_id {
        ComponentId::Proxyfier => "ProxiFyre.exe",
        ComponentId::Singbox => "sing-box.exe",
        ComponentId::ControlApp => "ProxyWarden.exe",
    };
    ComponentCandidateProbe {
        component_id,
        role,
        root: root.to_path_buf(),
        root_exists: true,
        has_reparse_point: false,
        executable_path: Some(root.join(executable_name)),
        missing_files: Vec::new(),
        marker,
        marker_required,
        binary_identity,
        binary_version: Some("2.4.0.0".to_string()),
        service,
        service_required: true,
        legacy_identity_complete: true,
    }
}

fn service(executable: &std::path::Path, matches: bool) -> ServiceEvidence {
    ServiceEvidence {
        name: "ProxiFyreService".to_string(),
        status: "stopped".to_string(),
        path_name: Some(format!(r#""{}" --service"#, executable.display())),
        executable_path: Some(executable.to_path_buf()),
        path_matches_candidate: matches,
        binary_version: Some("2.4.0.0".to_string()),
    }
}