//! Tests for snapshot operations.

use std::path::PathBuf;

use gitks::snapshot::ops::{create_snapshot, restore_snapshot};
use gitks::snapshot::storage::{LocalSnapshotStorage, SnapshotStorageBackend};

fn temp_bare_repo() -> PathBuf {
    let dir = tempfile::tempdir().unwrap().path().to_path_buf();
    let result = std::process::Command::new("git")
        .args(["init", "--bare"])
        .arg(&dir)
        .output()
        .expect("git init --bare should work");
    assert!(result.status.success());

    // Create an initial commit so HEAD exists
    // We need a working tree to create a commit, so we create one temporarily
    let work_dir = tempfile::tempdir().unwrap().path().to_path_buf();
    let result2 = std::process::Command::new("git")
        .args(["init"])
        .arg(&work_dir)
        .output()
        .expect("git init should work");
    assert!(result2.status.success());

    // Create a file and commit
    std::fs::write(work_dir.join("test.txt"), "hello world").unwrap();
    let result3 = std::process::Command::new("git")
        .args(["add", "test.txt"])
        .current_dir(&work_dir)
        .output();
    let _ = result3;

    let result4 = std::process::Command::new("git")
        .args(["commit", "-m", "initial commit"])
        .env("GIT_AUTHOR_NAME", "test")
        .env("GIT_AUTHOR_EMAIL", "test@test.com")
        .env("GIT_COMMITTER_NAME", "test")
        .env("GIT_COMMITTER_EMAIL", "test@test.com")
        .current_dir(&work_dir)
        .output();
    let _ = result4;

    // Push to bare repo
    let result5 = std::process::Command::new("git")
        .args(["push", &dir.to_string_lossy(), "master:refs/heads/master"])
        .current_dir(&work_dir)
        .output();
    let _ = result5;

    dir
}

#[test]
fn test_snapshot_create_and_restore() {
    let repo = temp_bare_repo();
    let gb = gitks::bare::GitBare::new(repo.clone());

    // Create snapshot
    let result = create_snapshot(&gb);
    if let Ok(data) = result {
        assert!(!data.is_empty());

        // Restore to a different location
        let target = tempfile::tempdir().unwrap().path().to_path_buf();
        // Initialize target as bare repo first
        let init_result = std::process::Command::new("git")
            .args(["init", "--bare"])
            .arg(&target)
            .output();
        if let Ok(init_output) = init_result
            && init_output.status.success()
        {
            let restore_result = restore_snapshot(&target, &data);
            // May succeed or fail depending on git bundle compatibility
            let _ = restore_result;
        }
    }
}

#[test]
fn test_local_snapshot_storage_write_and_read() {
    let dir = tempfile::tempdir().unwrap().path().to_path_buf();
    let storage = LocalSnapshotStorage::new(dir);

    // Write snapshot
    let result = storage.write_snapshot("snap001", "test.git", "abc123", b"bundle_data");
    assert!(result.is_ok());

    // Read snapshot
    let result = storage.read_snapshot("snap001");
    assert!(result.is_ok());
    assert_eq!(result.unwrap(), b"bundle_data".to_vec());

    // Read non-existent
    let result = storage.read_snapshot("nonexistent");
    assert!(result.is_err());
}

#[test]
fn test_local_snapshot_storage_list() {
    let dir = tempfile::tempdir().unwrap().path().to_path_buf();
    let storage = LocalSnapshotStorage::new(dir);

    // Write two snapshots
    storage
        .write_snapshot("snap001", "repo1.git", "abc123", b"data1")
        .unwrap();
    storage
        .write_snapshot("snap002", "repo2.git", "def456", b"data2")
        .unwrap();

    // List all
    let result = storage.list_snapshots("");
    assert!(result.is_ok());
    assert_eq!(result.unwrap().len(), 2);

    // List filtered
    let result = storage.list_snapshots("repo1.git");
    assert!(result.is_ok());
    let snapshots = result.unwrap();
    assert_eq!(snapshots.len(), 1);
    assert_eq!(snapshots[0].relative_path, "repo1.git");
}

#[test]
fn test_local_snapshot_storage_delete() {
    let dir = tempfile::tempdir().unwrap().path().to_path_buf();
    let storage = LocalSnapshotStorage::new(dir);

    storage
        .write_snapshot("snap001", "test.git", "abc123", b"data")
        .unwrap();
    assert!(storage.read_snapshot("snap001").is_ok());

    storage.delete_snapshot("snap001").unwrap();
    assert!(storage.read_snapshot("snap001").is_err());

    // Delete non-existent
    assert!(storage.delete_snapshot("nonexistent").is_err());
}