//! The most high-level integrated tests for rust-analyzer.
//!
//! This tests run a full LSP event loop, spawn cargo and process stdlib from
//! sysroot. For this reason, the tests here are very slow, and should be
//! avoided unless absolutely necessary.
//!
//! In particular, it's fine *not* to test that client & server agree on
//! specific JSON shapes here -- there's little value in such tests, as we can't
//! be sure without a real client anyway.

mod testdir;
mod support;

use std::{collections::HashMap, path::PathBuf, time::Instant};

use expect_test::expect;
use lsp_types::{
    notification::DidOpenTextDocument,
    request::{
        CodeActionRequest, Completion, Formatting, GotoTypeDefinition, HoverRequest,
        WillRenameFiles,
    },
    CodeActionContext, CodeActionParams, CompletionParams, DidOpenTextDocumentParams,
    DocumentFormattingParams, FileRename, FormattingOptions, GotoDefinitionParams, HoverParams,
    PartialResultParams, Position, Range, RenameFilesParams, TextDocumentItem,
    TextDocumentPositionParams, WorkDoneProgressParams,
};
use rust_analyzer::lsp_ext::{OnEnter, Runnables, RunnablesParams};
use serde_json::json;
use test_utils::skip_slow_tests;

use crate::{
    support::{project, Project},
    testdir::TestDir,
};

const PROFILE: &str = "";
// const PROFILE: &'static str = "*@3>100";

#[test]
fn completes_items_from_standard_library() {
    if skip_slow_tests() {
        return;
    }

    let server = Project::with_fixture(
        r#"
//- /Cargo.toml
[package]
name = "foo"
version = "0.0.0"

//- /src/lib.rs
use std::collections::Spam;
"#,
    )
    .with_config(serde_json::json!({
        "cargo": { "noSysroot": false }
    }))
    .server()
    .wait_until_workspace_is_loaded();

    let res = server.send_request::<Completion>(CompletionParams {
        text_document_position: TextDocumentPositionParams::new(
            server.doc_id("src/lib.rs"),
            Position::new(0, 23),
        ),
        context: None,
        partial_result_params: PartialResultParams::default(),
        work_done_progress_params: WorkDoneProgressParams::default(),
    });
    assert!(res.to_string().contains("HashMap"));
}

#[test]
fn test_runnables_project() {
    if skip_slow_tests() {
        return;
    }

    let server = Project::with_fixture(
        r#"
//- /foo/Cargo.toml
[package]
name = "foo"
version = "0.0.0"

//- /foo/src/lib.rs
pub fn foo() {}

//- /foo/tests/spam.rs
#[test]
fn test_eggs() {}

//- /bar/Cargo.toml
[package]
name = "bar"
version = "0.0.0"

//- /bar/src/main.rs
fn main() {}
"#,
    )
    .root("foo")
    .root("bar")
    .server()
    .wait_until_workspace_is_loaded();

    server.request::<Runnables>(
        RunnablesParams { text_document: server.doc_id("foo/tests/spam.rs"), position: None },
        json!([
          {
            "args": {
              "cargoArgs": ["test", "--package", "foo", "--test", "spam"],
              "executableArgs": ["test_eggs", "--exact", "--nocapture"],
              "cargoExtraArgs": [],
              "overrideCargo": null,
              "workspaceRoot": server.path().join("foo")
            },
            "kind": "cargo",
            "label": "test test_eggs",
            "location": {
              "targetRange": {
                "end": { "character": 17, "line": 1 },
                "start": { "character": 0, "line": 0 }
              },
              "targetSelectionRange": {
                "end": { "character": 12, "line": 1 },
                "start": { "character": 3, "line": 1 }
              },
              "targetUri": "file:///[..]/tests/spam.rs"
            }
          },
          {
            "args": {
              "cargoArgs": ["check", "--package", "foo", "--all-targets"],
              "executableArgs": [],
              "cargoExtraArgs": [],
              "overrideCargo": null,
              "workspaceRoot": server.path().join("foo")
            },
            "kind": "cargo",
            "label": "cargo check -p foo --all-targets"
          },
          {
            "args": {
              "cargoArgs": ["test", "--package", "foo", "--all-targets"],
              "executableArgs": [],
              "cargoExtraArgs": [],
              "overrideCargo": null,
              "workspaceRoot": server.path().join("foo")
            },
            "kind": "cargo",
            "label": "cargo test -p foo --all-targets"
          }
        ]),
    );
}

#[test]
fn test_format_document() {
    if skip_slow_tests() {
        return;
    }

    let server = project(
        r#"
//- /Cargo.toml
[package]
name = "foo"
version = "0.0.0"

//- /src/lib.rs
mod bar;

fn main() {
}

pub use std::collections::HashMap;
"#,
    )
    .wait_until_workspace_is_loaded();

    server.request::<Formatting>(
        DocumentFormattingParams {
            text_document: server.doc_id("src/lib.rs"),
            options: FormattingOptions {
                tab_size: 4,
                insert_spaces: false,
                insert_final_newline: None,
                trim_final_newlines: None,
                trim_trailing_whitespace: None,
                properties: HashMap::new(),
            },
            work_done_progress_params: WorkDoneProgressParams::default(),
        },
        json!([
            {
                "newText": "",
                "range": {
                    "end": { "character": 0, "line": 3 },
                    "start": { "character": 11, "line": 2 }
                }
            }
        ]),
    );
}

#[test]
fn test_format_document_2018() {
    if skip_slow_tests() {
        return;
    }

    let server = project(
        r#"
//- /Cargo.toml
[package]
name = "foo"
version = "0.0.0"
edition = "2018"

//- /src/lib.rs
mod bar;

async fn test() {
}

fn main() {
}

pub use std::collections::HashMap;
"#,
    )
    .wait_until_workspace_is_loaded();

    server.request::<Formatting>(
        DocumentFormattingParams {
            text_document: server.doc_id("src/lib.rs"),
            options: FormattingOptions {
                tab_size: 4,
                insert_spaces: false,
                properties: HashMap::new(),
                insert_final_newline: None,
                trim_final_newlines: None,
                trim_trailing_whitespace: None,
            },
            work_done_progress_params: WorkDoneProgressParams::default(),
        },
        json!([
            {
                "newText": "",
                "range": {
                    "end": { "character": 0, "line": 3 },
                    "start": { "character": 17, "line": 2 }
                }
            },
            {
                "newText": "",
                "range": {
                    "end": { "character": 0, "line": 6 },
                    "start": { "character": 11, "line": 5 }
                }
            }
        ]),
    );
}

#[test]
fn test_format_document_unchanged() {
    if skip_slow_tests() {
        return;
    }

    let server = project(
        r#"
//- /Cargo.toml
[package]
name = "foo"
version = "0.0.0"

//- /src/lib.rs
fn main() {}
"#,
    )
    .wait_until_workspace_is_loaded();

    server.request::<Formatting>(
        DocumentFormattingParams {
            text_document: server.doc_id("src/lib.rs"),
            options: FormattingOptions {
                tab_size: 4,
                insert_spaces: false,
                insert_final_newline: None,
                trim_final_newlines: None,
                trim_trailing_whitespace: None,
                properties: HashMap::new(),
            },
            work_done_progress_params: WorkDoneProgressParams::default(),
        },
        json!(null),
    );
}

#[test]
fn test_missing_module_code_action() {
    if skip_slow_tests() {
        return;
    }

    let server = project(
        r#"
//- /Cargo.toml
[package]
name = "foo"
version = "0.0.0"

//- /src/lib.rs
mod bar;

fn main() {}
"#,
    )
    .wait_until_workspace_is_loaded();

    server.request::<CodeActionRequest>(
        CodeActionParams {
            text_document: server.doc_id("src/lib.rs"),
            range: Range::new(Position::new(0, 4), Position::new(0, 7)),
            context: CodeActionContext::default(),
            partial_result_params: PartialResultParams::default(),
            work_done_progress_params: WorkDoneProgressParams::default(),
        },
        json!([{
            "edit": {
              "documentChanges": [
                {
                  "kind": "create",
                  "uri": "file:///[..]/src/bar.rs"
                }
              ]
            },
            "isPreferred": false,
            "kind": "quickfix",
            "title": "Create module"
        }]),
    );

    server.request::<CodeActionRequest>(
        CodeActionParams {
            text_document: server.doc_id("src/lib.rs"),
            range: Range::new(Position::new(2, 4), Position::new(2, 7)),
            context: CodeActionContext::default(),
            partial_result_params: PartialResultParams::default(),
            work_done_progress_params: WorkDoneProgressParams::default(),
        },
        json!([]),
    );
}

#[test]
fn test_missing_module_code_action_in_json_project() {
    if skip_slow_tests() {
        return;
    }

    let tmp_dir = TestDir::new();

    let path = tmp_dir.path();

    let project = json!({
        "roots": [path],
        "crates": [ {
            "root_module": path.join("src/lib.rs"),
            "deps": [],
            "edition": "2015",
            "cfg": [ "cfg_atom_1", "feature=\"cfg_1\""],
        } ]
    });

    let code = format!(
        r#"
//- /rust-project.json
{PROJECT}

//- /src/lib.rs
mod bar;

fn main() {{}}
"#,
        PROJECT = project.to_string(),
    );

    let server =
        Project::with_fixture(&code).tmp_dir(tmp_dir).server().wait_until_workspace_is_loaded();

    server.request::<CodeActionRequest>(
        CodeActionParams {
            text_document: server.doc_id("src/lib.rs"),
            range: Range::new(Position::new(0, 4), Position::new(0, 7)),
            context: CodeActionContext::default(),
            partial_result_params: PartialResultParams::default(),
            work_done_progress_params: WorkDoneProgressParams::default(),
        },
        json!([{
            "edit": {
              "documentChanges": [
                {
                  "kind": "create",
                  "uri": "file://[..]/src/bar.rs"
                }
              ]
            },
            "isPreferred": false,
            "kind": "quickfix",
            "title": "Create module"
        }]),
    );

    server.request::<CodeActionRequest>(
        CodeActionParams {
            text_document: server.doc_id("src/lib.rs"),
            range: Range::new(Position::new(2, 4), Position::new(2, 7)),
            context: CodeActionContext::default(),
            partial_result_params: PartialResultParams::default(),
            work_done_progress_params: WorkDoneProgressParams::default(),
        },
        json!([]),
    );
}

#[test]
fn diagnostics_dont_block_typing() {
    if skip_slow_tests() {
        return;
    }

    let librs: String = (0..10).map(|i| format!("mod m{};", i)).collect();
    let libs: String = (0..10).map(|i| format!("//- /src/m{}.rs\nfn foo() {{}}\n\n", i)).collect();
    let server = Project::with_fixture(&format!(
        r#"
//- /Cargo.toml
[package]
name = "foo"
version = "0.0.0"

//- /src/lib.rs
{}

{}

fn main() {{}}
"#,
        librs, libs
    ))
    .with_config(serde_json::json!({
        "cargo": { "noSysroot": false }
    }))
    .server()
    .wait_until_workspace_is_loaded();

    for i in 0..10 {
        server.notification::<DidOpenTextDocument>(DidOpenTextDocumentParams {
            text_document: TextDocumentItem {
                uri: server.doc_id(&format!("src/m{}.rs", i)).uri,
                language_id: "rust".to_string(),
                version: 0,
                text: "/// Docs\nfn foo() {}".to_string(),
            },
        });
    }
    let start = Instant::now();
    server.request::<OnEnter>(
        TextDocumentPositionParams {
            text_document: server.doc_id("src/m0.rs"),
            position: Position { line: 0, character: 5 },
        },
        json!([{
            "insertTextFormat": 2,
            "newText": "\n/// $0",
            "range": {
            "end": { "character": 5, "line": 0 },
            "start": { "character": 5, "line": 0 }
            }
        }]),
    );
    let elapsed = start.elapsed();
    assert!(elapsed.as_millis() < 2000, "typing enter took {:?}", elapsed);
}

#[test]
fn preserves_dos_line_endings() {
    if skip_slow_tests() {
        return;
    }

    let server = Project::with_fixture(
        &"
//- /Cargo.toml
[package]
name = \"foo\"
version = \"0.0.0\"

//- /src/main.rs
/// Some Docs\r\nfn main() {}
",
    )
    .server()
    .wait_until_workspace_is_loaded();

    server.request::<OnEnter>(
        TextDocumentPositionParams {
            text_document: server.doc_id("src/main.rs"),
            position: Position { line: 0, character: 8 },
        },
        json!([{
            "insertTextFormat": 2,
            "newText": "\r\n/// $0",
            "range": {
            "end": { "line": 0, "character": 8 },
            "start": { "line": 0, "character": 8 }
            }
        }]),
    );
}

#[test]
fn out_dirs_check() {
    if skip_slow_tests() {
        return;
    }

    let server = Project::with_fixture(
        r###"
//- /Cargo.toml
[package]
name = "foo"
version = "0.0.0"

//- /build.rs
use std::{env, fs, path::Path};

fn main() {
    let out_dir = env::var_os("OUT_DIR").unwrap();
    let dest_path = Path::new(&out_dir).join("hello.rs");
    fs::write(
        &dest_path,
        r#"pub fn message() -> &'static str { "Hello, World!" }"#,
    )
    .unwrap();
    println!("cargo:rustc-cfg=atom_cfg");
    println!("cargo:rustc-cfg=featlike=\"set\"");
    println!("cargo:rerun-if-changed=build.rs");
}
//- /src/main.rs
#[rustc_builtin_macro] macro_rules! include {}
#[rustc_builtin_macro] macro_rules! include_str {}
#[rustc_builtin_macro] macro_rules! concat {}
#[rustc_builtin_macro] macro_rules! env {}

include!(concat!(env!("OUT_DIR"), "/hello.rs"));

#[cfg(atom_cfg)]
struct A;
#[cfg(bad_atom_cfg)]
struct A;
#[cfg(featlike = "set")]
struct B;
#[cfg(featlike = "not_set")]
struct B;

fn main() {
    let va = A;
    let vb = B;
    let should_be_str = message();
    let another_str = include_str!("main.rs");
}
"###,
    )
    .with_config(serde_json::json!({
        "cargo": {
            "loadOutDirsFromCheck": true,
            "noSysroot": true,
        }
    }))
    .server()
    .wait_until_workspace_is_loaded();

    let res = server.send_request::<HoverRequest>(HoverParams {
        text_document_position_params: TextDocumentPositionParams::new(
            server.doc_id("src/main.rs"),
            Position::new(19, 10),
        ),
        work_done_progress_params: Default::default(),
    });
    assert!(res.to_string().contains("&str"));

    let res = server.send_request::<HoverRequest>(HoverParams {
        text_document_position_params: TextDocumentPositionParams::new(
            server.doc_id("src/main.rs"),
            Position::new(20, 10),
        ),
        work_done_progress_params: Default::default(),
    });
    assert!(res.to_string().contains("&str"));

    server.request::<GotoTypeDefinition>(
        GotoDefinitionParams {
            text_document_position_params: TextDocumentPositionParams::new(
                server.doc_id("src/main.rs"),
                Position::new(17, 9),
            ),
            work_done_progress_params: Default::default(),
            partial_result_params: Default::default(),
        },
        json!([{
            "originSelectionRange": {
                "end": { "character": 10, "line": 17 },
                "start": { "character": 8, "line": 17 }
            },
            "targetRange": {
                "end": { "character": 9, "line": 8 },
                "start": { "character": 0, "line": 7 }
            },
            "targetSelectionRange": {
                "end": { "character": 8, "line": 8 },
                "start": { "character": 7, "line": 8 }
            },
            "targetUri": "file:///[..]src/main.rs"
        }]),
    );

    server.request::<GotoTypeDefinition>(
        GotoDefinitionParams {
            text_document_position_params: TextDocumentPositionParams::new(
                server.doc_id("src/main.rs"),
                Position::new(18, 9),
            ),
            work_done_progress_params: Default::default(),
            partial_result_params: Default::default(),
        },
        json!([{
            "originSelectionRange": {
                "end": { "character": 10, "line": 18 },
                "start": { "character": 8, "line": 18 }
            },
            "targetRange": {
                "end": { "character": 9, "line": 12 },
                "start": { "character": 0, "line":11 }
            },
            "targetSelectionRange": {
                "end": { "character": 8, "line": 12 },
                "start": { "character": 7, "line": 12 }
            },
            "targetUri": "file:///[..]src/main.rs"
        }]),
    );
}

#[test]
fn resolve_proc_macro() {
    if skip_slow_tests() {
        return;
    }

    let server = Project::with_fixture(
        r###"
//- /foo/Cargo.toml
[package]
name = "foo"
version = "0.0.0"
edition = "2018"
[dependencies]
bar = {path = "../bar"}

//- /foo/src/main.rs
use bar::Bar;
trait Bar {
  fn bar();
}
#[derive(Bar)]
struct Foo {}
fn main() {
  Foo::bar();
}

//- /bar/Cargo.toml
[package]
name = "bar"
version = "0.0.0"
edition = "2018"

[lib]
proc-macro = true

//- /bar/src/lib.rs
extern crate proc_macro;
use proc_macro::{Delimiter, Group, Ident, Span, TokenStream, TokenTree};
macro_rules! t {
    ($n:literal) => {
        TokenTree::from(Ident::new($n, Span::call_site()))
    };
    ({}) => {
        TokenTree::from(Group::new(Delimiter::Brace, TokenStream::new()))
    };
    (()) => {
        TokenTree::from(Group::new(Delimiter::Parenthesis, TokenStream::new()))
    };
}
#[proc_macro_derive(Bar)]
pub fn foo(_input: TokenStream) -> TokenStream {
    // We hard code the output here for preventing to use any deps
    let mut res = TokenStream::new();

    // ill behaved proc-macro will use the stdout
    // we should ignore it
    println!("I am bad guy");

    // impl Bar for Foo { fn bar() {} }
    let mut tokens = vec![t!("impl"), t!("Bar"), t!("for"), t!("Foo")];
    let mut fn_stream = TokenStream::new();
    fn_stream.extend(vec![t!("fn"), t!("bar"), t!(()), t!({})]);
    tokens.push(Group::new(Delimiter::Brace, fn_stream).into());
    res.extend(tokens);
    res
}

"###,
    )
    .with_config(serde_json::json!({
        "cargo": {
            "loadOutDirsFromCheck": true,
            "noSysroot": true,
        },
        "procMacro": {
            "enable": true,
            "server": PathBuf::from(env!("CARGO_BIN_EXE_rust-analyzer")),
        }
    }))
    .root("foo")
    .root("bar")
    .server()
    .wait_until_workspace_is_loaded();

    let res = server.send_request::<HoverRequest>(HoverParams {
        text_document_position_params: TextDocumentPositionParams::new(
            server.doc_id("foo/src/main.rs"),
            Position::new(7, 9),
        ),
        work_done_progress_params: Default::default(),
    });
    let value = res.get("contents").unwrap().get("value").unwrap().as_str().unwrap();

    expect![[r#"

        ```rust
        foo::Bar
        ```

        ```rust
        fn bar()
        ```"#]]
    .assert_eq(&value);
}

#[test]
fn test_will_rename_files_same_level() {
    if skip_slow_tests() {
        return;
    }

    let tmp_dir = TestDir::new();
    let tmp_dir_path = tmp_dir.path().to_owned();
    let tmp_dir_str = tmp_dir_path.to_str().unwrap();
    let base_path = PathBuf::from(format!("file://{}", tmp_dir_str));

    let code = r#"
//- /Cargo.toml
[package]
name = "foo"
version = "0.0.0"

//- /src/lib.rs
mod old_file;
mod from_mod;
mod to_mod;
mod old_folder;
fn main() {}

//- /src/old_file.rs

//- /src/old_folder/mod.rs

//- /src/from_mod/mod.rs

//- /src/to_mod/foo.rs

"#;
    let server =
        Project::with_fixture(&code).tmp_dir(tmp_dir).server().wait_until_workspace_is_loaded();

    //rename same level file
    server.request::<WillRenameFiles>(
        RenameFilesParams {
            files: vec![FileRename {
                old_uri: base_path.join("src/old_file.rs").to_str().unwrap().to_string(),
                new_uri: base_path.join("src/new_file.rs").to_str().unwrap().to_string(),
            }],
        },
        json!({
          "documentChanges": [
            {
              "textDocument": {
                "uri": format!("file://{}", tmp_dir_path.join("src").join("lib.rs").to_str().unwrap().to_string().replace("C:\\", "/c:/").replace("\\", "/")),
                "version": null
              },
              "edits": [
                {
                  "range": {
                    "start": {
                      "line": 0,
                      "character": 4
                    },
                    "end": {
                      "line": 0,
                      "character": 12
                    }
                  },
                  "newText": "new_file"
                }
              ]
            }
          ]
        }),
    );

    //rename file from mod.rs to foo.rs
    server.request::<WillRenameFiles>(
        RenameFilesParams {
            files: vec![FileRename {
                old_uri: base_path.join("src/from_mod/mod.rs").to_str().unwrap().to_string(),
                new_uri: base_path.join("src/from_mod/foo.rs").to_str().unwrap().to_string(),
            }],
        },
        json!(null),
    );

    //rename file from foo.rs to mod.rs
    server.request::<WillRenameFiles>(
        RenameFilesParams {
            files: vec![FileRename {
                old_uri: base_path.join("src/to_mod/foo.rs").to_str().unwrap().to_string(),
                new_uri: base_path.join("src/to_mod/mod.rs").to_str().unwrap().to_string(),
            }],
        },
        json!(null),
    );

    //rename same level file
    server.request::<WillRenameFiles>(
        RenameFilesParams {
            files: vec![FileRename {
                old_uri: base_path.join("src/old_folder").to_str().unwrap().to_string(),
                new_uri: base_path.join("src/new_folder").to_str().unwrap().to_string(),
            }],
        },
        json!({
          "documentChanges": [
            {
              "textDocument": {
                "uri": format!("file://{}", tmp_dir_path.join("src").join("lib.rs").to_str().unwrap().to_string().replace("C:\\", "/c:/").replace("\\", "/")),
                "version": null
              },
              "edits": [
                {
                  "range": {
                    "start": {
                      "line": 3,
                      "character": 4
                    },
                    "end": {
                      "line": 3,
                      "character": 14
                    }
                  },
                  "newText": "new_folder"
                }
              ]
            }
          ]
        }),
    );
}