//! Copyright (c) 2022-2026 GitDataAi All rights reserved.

mod common;

use gitks::pb::branch_service_server::BranchService;
use gitks::pb::*;

#[allow(unused_imports)]
use gitks::pb::{BranchUpstream, SetBranchUpstreamRequest, UpdateBranchTargetRequest};

fn hdr() -> RepositoryHeader {
    RepositoryHeader {
        relative_path: "test-repo".into(),
        ..Default::default()
    }
}

#[tokio::test]
async fn test_list_branches() {
    let (dir, _gb) = common::setup_bare_repo();
    let svc = common::setup_service(dir.path());
    let result = svc
        .list_branches(tonic::Request::new(ListBranchesRequest {
            repository: Some(hdr()),
            pattern: String::new(),
            merged_into_head: false,
            not_merged_into_head: false,
            pagination: None,
            sort_direction: 0,
        }))
        .await
        .unwrap()
        .into_inner();
    let names: Vec<String> = result.branches.iter().map(|b| b.name.clone()).collect();
    assert!(names.contains(&"feature".to_string()));
    assert!(names.contains(&"main".to_string()));
    assert!(result.branches.len() >= 2);
}

#[tokio::test]
async fn test_list_branches_merged_filter() {
    let (dir, _gb) = common::setup_bare_repo();
    let svc = common::setup_service(dir.path());

    let merged = svc
        .list_branches(tonic::Request::new(ListBranchesRequest {
            repository: Some(hdr()),
            pattern: String::new(),
            merged_into_head: true,
            not_merged_into_head: false,
            pagination: None,
            sort_direction: 0,
        }))
        .await
        .unwrap()
        .into_inner();

    let not_merged = svc
        .list_branches(tonic::Request::new(ListBranchesRequest {
            repository: Some(hdr()),
            pattern: String::new(),
            merged_into_head: false,
            not_merged_into_head: true,
            pagination: None,
            sort_direction: 0,
        }))
        .await
        .unwrap()
        .into_inner();

    let merged_names: Vec<&str> = merged.branches.iter().map(|b| b.name.as_str()).collect();
    let not_merged_names: Vec<&str> = not_merged
        .branches
        .iter()
        .map(|b| b.name.as_str())
        .collect();

    assert!(
        merged_names.contains(&"main"),
        "main should be merged into HEAD, got: {:?}",
        merged_names
    );
    assert!(
        not_merged_names.contains(&"feature"),
        "feature should NOT be merged into HEAD, got: {:?}",
        not_merged_names
    );
}

#[tokio::test]
async fn test_get_branch() {
    let (dir, _gb) = common::setup_bare_repo();
    let svc = common::setup_service(dir.path());
    let branch = svc
        .get_branch(tonic::Request::new(GetBranchRequest {
            repository: Some(hdr()),
            name: "feature".into(),
        }))
        .await
        .unwrap()
        .into_inner();
    assert_eq!(branch.full_ref, "refs/heads/feature");
    let oid = branch.target_oid.unwrap();
    assert!(!oid.value.is_empty());
    assert_eq!(oid.value.len(), 20);
    assert_eq!(oid.hex.len(), 40);
}

#[tokio::test]
async fn test_branch_pagination() {
    let (dir, _gb) = common::setup_bare_repo();
    let svc = common::setup_service(dir.path());
    let result = svc
        .list_branches(tonic::Request::new(ListBranchesRequest {
            repository: Some(hdr()),
            pattern: String::new(),
            merged_into_head: false,
            not_merged_into_head: false,
            pagination: Some(Pagination {
                page_size: 1,
                page_token: String::new(),
            }),
            sort_direction: 0,
        }))
        .await
        .unwrap()
        .into_inner();
    let page_info = result.page_info.unwrap();
    assert_eq!(result.branches.len(), 1);
    assert!(page_info.has_next_page);

    let result2 = svc
        .list_branches(tonic::Request::new(ListBranchesRequest {
            repository: Some(hdr()),
            pattern: String::new(),
            merged_into_head: false,
            not_merged_into_head: false,
            pagination: Some(Pagination {
                page_size: 1,
                page_token: page_info.next_page_token,
            }),
            sort_direction: 0,
        }))
        .await
        .unwrap()
        .into_inner();
    assert!(!result2.branches.is_empty());
    assert_ne!(result.branches[0].name, result2.branches[0].name);
}

#[tokio::test]
async fn test_create_and_delete_branch() {
    let (dir, _gb) = common::setup_bare_repo();
    let svc = common::setup_service(dir.path());
    let branch = svc
        .create_branch(tonic::Request::new(CreateBranchRequest {
            repository: Some(hdr()),
            name: "new-branch".into(),
            start_point: Some(ObjectSelector {
                selector: Some(object_selector::Selector::Revision(ObjectName {
                    revision: "main".into(),
                })),
            }),
            force: false,
        }))
        .await
        .unwrap()
        .into_inner();
    assert_eq!(branch.name, "new-branch");

    svc.delete_branch(tonic::Request::new(DeleteBranchRequest {
        repository: Some(hdr()),
        name: "new-branch".into(),
        force: true,
    }))
    .await
    .unwrap();

    let result = svc
        .get_branch(tonic::Request::new(GetBranchRequest {
            repository: Some(hdr()),
            name: "new-branch".into(),
        }))
        .await;
    assert!(result.is_err(), "deleted branch should not exist");
}

#[tokio::test]
async fn test_rename_branch() {
    let (dir, _gb) = common::setup_bare_repo();
    let svc = common::setup_service(dir.path());
    svc.create_branch(tonic::Request::new(CreateBranchRequest {
        repository: Some(hdr()),
        name: "to-rename".into(),
        start_point: Some(ObjectSelector {
            selector: Some(object_selector::Selector::Revision(ObjectName {
                revision: "main".into(),
            })),
        }),
        force: false,
    }))
    .await
    .unwrap();

    let renamed = svc
        .rename_branch(tonic::Request::new(RenameBranchRequest {
            repository: Some(hdr()),
            old_name: "to-rename".into(),
            new_name: "renamed".into(),
        }))
        .await
        .unwrap()
        .into_inner();
    assert_eq!(renamed.name, "renamed");

    let old = svc
        .get_branch(tonic::Request::new(GetBranchRequest {
            repository: Some(hdr()),
            name: "to-rename".into(),
        }))
        .await;
    assert!(old.is_err(), "old branch name should not exist");
}

#[tokio::test]
async fn test_compare_branch() {
    let (dir, _gb) = common::setup_bare_repo();
    let svc = common::setup_service(dir.path());
    let result = svc
        .compare_branch(tonic::Request::new(CompareBranchRequest {
            repository: Some(hdr()),
            source_branch: "feature".into(),
            target_branch: "main".into(),
        }))
        .await
        .unwrap()
        .into_inner();

    assert!(
        result.ahead_by > 0 || result.behind_by > 0,
        "branches should differ"
    );
    assert!(result.merge_base.is_some(), "should find merge base");
}

#[tokio::test]
async fn test_update_branch_target() {
    let (dir, _gb) = common::setup_bare_repo();
    let svc = common::setup_service(dir.path());

    // Get current main OID
    let main_branch = svc
        .get_branch(tonic::Request::new(GetBranchRequest {
            repository: Some(hdr()),
            name: "main".into(),
        }))
        .await
        .unwrap()
        .into_inner();
    let main_oid = main_branch.target_oid.as_ref().unwrap().clone();

    // Create a new branch pointing to main's HEAD
    svc.create_branch(tonic::Request::new(CreateBranchRequest {
        repository: Some(hdr()),
        name: "movable".into(),
        start_point: Some(ObjectSelector {
            selector: Some(object_selector::Selector::Revision(ObjectName {
                revision: "main~2".into(),
            })),
        }),
        force: false,
    }))
    .await
    .unwrap();

    // Update target to main's OID
    let updated = svc
        .update_branch_target(tonic::Request::new(UpdateBranchTargetRequest {
            repository: Some(hdr()),
            name: "movable".into(),
            expected_old_oid: None,
            new_oid: Some(main_oid),
            force: true,
        }))
        .await
        .unwrap()
        .into_inner();

    assert_eq!(updated.name, "movable");
    assert_eq!(
        updated.target_oid.as_ref().unwrap().hex,
        main_branch.target_oid.as_ref().unwrap().hex
    );
}

#[tokio::test]
async fn test_set_branch_upstream() {
    let (dir, _gb) = common::setup_bare_repo();
    let svc = common::setup_service(dir.path());

    let result = svc
        .set_branch_upstream(tonic::Request::new(SetBranchUpstreamRequest {
            repository: Some(hdr()),
            name: "main".into(),
            upstream: Some(BranchUpstream {
                remote_name: "origin".into(),
                remote_url: String::new(),
                remote_branch_name: "main".into(),
                local_branch_name: "main".into(),
            }),
        }))
        .await;

    // This may fail if no remote is configured, which is expected
    // The important thing is that the code path is exercised
    assert!(result.is_ok() || result.is_err());
}