use aim_core::app::progress::{OperationEvent, OperationStage};
use aim_core::app::update::{build_update_plan, execute_updates, execute_updates_with_reporter};
use aim_core::domain::app::{AppRecord, InstallMetadata, InstallScope};
use aim_core::domain::update::{ChannelPreference, UpdateChannelKind, UpdateStrategy};
use tempfile::tempdir;

#[test]
fn empty_registry_produces_empty_plan() {
    let plan = build_update_plan(&[]).unwrap();

    assert!(plan.items.is_empty());
}

#[test]
fn installed_apps_are_carried_into_review_plan() {
    let apps = [AppRecord {
        stable_id: "bat".to_owned(),
        display_name: "Bat".to_owned(),
        source_input: None,
        source: None,
        installed_version: None,
        update_strategy: None,
        metadata: Vec::new(),
        install: None,
    }];

    let plan = build_update_plan(&apps).unwrap();

    assert_eq!(plan.items.len(), 1);
    assert_eq!(plan.items[0].stable_id, "bat");
    assert_eq!(plan.items[0].selection_reason, "install-origin-match");
}

#[test]
fn update_plan_uses_alternate_channel_after_preferred_failure() {
    let apps = [AppRecord {
        stable_id: "t3code".to_owned(),
        display_name: "T3 Code".to_owned(),
        source_input: Some("pingdotgg/t3code".to_owned()),
        source: None,
        installed_version: Some("0.0.11".to_owned()),
        update_strategy: Some(UpdateStrategy {
            preferred: ChannelPreference {
                kind: UpdateChannelKind::GitHubReleases,
                locator: "fail://github".to_owned(),
                reason: "install-origin-match".to_owned(),
            },
            alternates: vec![ChannelPreference {
                kind: UpdateChannelKind::ElectronBuilder,
                locator: "https://example.test/latest-linux.yml".to_owned(),
                reason: "metadata-guided".to_owned(),
            }],
        }),
        metadata: Vec::new(),
        install: None,
    }];

    let plan = build_update_plan(&apps).unwrap();

    assert_eq!(
        plan.items[0].selected_channel.kind.as_str(),
        "electron-builder"
    );
    assert_eq!(plan.items[0].selection_reason, "preferred-channel-failed");
}

#[test]
fn failed_update_keeps_previous_app_record() {
    let install_home = tempdir().unwrap();
    let previous = AppRecord {
        stable_id: "legacy-bat".to_owned(),
        display_name: "Legacy Bat".to_owned(),
        source_input: None,
        source: None,
        installed_version: Some("0.9.0".to_owned()),
        update_strategy: None,
        metadata: Vec::new(),
        install: Some(InstallMetadata {
            scope: InstallScope::User,
            payload_path: None,
            desktop_entry_path: None,
            icon_path: None,
        }),
    };

    let result = execute_updates(std::slice::from_ref(&previous), install_home.path()).unwrap();

    assert_eq!(result.apps, vec![previous]);
    assert_eq!(result.updated_count(), 0);
    assert_eq!(result.failed_count(), 1);
}

#[test]
fn update_execution_reports_per_app_lifecycle_events() {
    let install_home = tempdir().unwrap();
    let app = AppRecord {
        stable_id: "legacy-bat".to_owned(),
        display_name: "Legacy Bat".to_owned(),
        source_input: None,
        source: None,
        installed_version: Some("0.9.0".to_owned()),
        update_strategy: None,
        metadata: Vec::new(),
        install: Some(InstallMetadata {
            scope: InstallScope::User,
            payload_path: None,
            desktop_entry_path: None,
            icon_path: None,
        }),
    };
    let mut events: Vec<OperationEvent> = Vec::new();
    let mut reporter = |event: &OperationEvent| events.push(event.clone());

    let result = execute_updates_with_reporter(
        std::slice::from_ref(&app),
        install_home.path(),
        &mut reporter,
    )
    .unwrap();

    assert_eq!(result.failed_count(), 1);
    assert!(events.iter().any(|event| {
        matches!(
            event,
            OperationEvent::StageChanged {
                stage: OperationStage::ResolveQuery,
                ..
            }
        )
    }));
    assert!(events.iter().any(|event| {
        matches!(
            event,
            OperationEvent::Failed {
                stage: OperationStage::ResolveQuery,
                ..
            }
        )
    }));
}