use std::env;
use std::fs::{self, File};
use std::io::prelude::*;

use crate::support::paths;
use crate::support::{cargo_process, git_process};

fn create_empty_gitconfig() {
    // This helps on Windows where libgit2 is very aggressive in attempting to
    // find a git config file.
    let gitconfig = paths::home().join(".gitconfig");
    File::create(gitconfig).unwrap();
}

#[test]
fn simple_lib() {
    cargo_process("new --lib foo --vcs none --edition 2015")
        .env("USER", "foo")
        .with_stderr("[CREATED] library `foo` package")
        .run();

    assert!(paths::root().join("foo").is_dir());
    assert!(paths::root().join("foo/Cargo.toml").is_file());
    assert!(paths::root().join("foo/src/lib.rs").is_file());
    assert!(!paths::root().join("foo/.gitignore").is_file());

    let lib = paths::root().join("foo/src/lib.rs");
    let mut contents = String::new();
    File::open(&lib)
        .unwrap()
        .read_to_string(&mut contents)
        .unwrap();
    assert_eq!(
        contents,
        r#"#[cfg(test)]
mod tests {
    #[test]
    fn it_works() {
        assert_eq!(2 + 2, 4);
    }
}
"#
    );

    cargo_process("build").cwd(&paths::root().join("foo")).run();
}

#[test]
fn simple_bin() {
    cargo_process("new --bin foo --edition 2015")
        .env("USER", "foo")
        .with_stderr("[CREATED] binary (application) `foo` package")
        .run();

    assert!(paths::root().join("foo").is_dir());
    assert!(paths::root().join("foo/Cargo.toml").is_file());
    assert!(paths::root().join("foo/src/main.rs").is_file());

    cargo_process("build").cwd(&paths::root().join("foo")).run();
    assert!(paths::root()
        .join(&format!("foo/target/debug/foo{}", env::consts::EXE_SUFFIX))
        .is_file());
}

#[test]
fn both_lib_and_bin() {
    cargo_process("new --lib --bin foo")
        .env("USER", "foo")
        .with_status(101)
        .with_stderr("[ERROR] can't specify both lib and binary outputs")
        .run();
}

#[test]
fn simple_git() {
    cargo_process("new --lib foo --edition 2015")
        .env("USER", "foo")
        .run();

    assert!(paths::root().is_dir());
    assert!(paths::root().join("foo/Cargo.toml").is_file());
    assert!(paths::root().join("foo/src/lib.rs").is_file());
    assert!(paths::root().join("foo/.git").is_dir());
    assert!(paths::root().join("foo/.gitignore").is_file());

    cargo_process("build").cwd(&paths::root().join("foo")).run();
}

#[test]
fn no_argument() {
    cargo_process("new")
        .with_status(1)
        .with_stderr_contains(
            "\
error: The following required arguments were not provided:
    <path>
",
        )
        .run();
}

#[test]
fn existing() {
    let dst = paths::root().join("foo");
    fs::create_dir(&dst).unwrap();
    cargo_process("new foo")
        .with_status(101)
        .with_stderr(
            "[ERROR] destination `[CWD]/foo` already exists\n\n\
             Use `cargo init` to initialize the directory",
        )
        .run();
}

#[test]
fn invalid_characters() {
    cargo_process("new foo.rs")
        .with_status(101)
        .with_stderr(
            "\
[ERROR] Invalid character `.` in crate name: `foo.rs`
use --name to override crate name",
        )
        .run();
}

#[test]
fn reserved_name() {
    cargo_process("new test")
        .with_status(101)
        .with_stderr(
            "\
             [ERROR] The name `test` cannot be used as a crate name\n\
             use --name to override crate name",
        )
        .run();
}

#[test]
fn reserved_binary_name() {
    cargo_process("new --bin incremental")
        .with_status(101)
        .with_stderr(
            "\
             [ERROR] The name `incremental` cannot be used as a crate name\n\
             use --name to override crate name",
        )
        .run();
}

#[test]
fn keyword_name() {
    cargo_process("new pub")
        .with_status(101)
        .with_stderr(
            "\
             [ERROR] The name `pub` cannot be used as a crate name\n\
             use --name to override crate name",
        )
        .run();
}

#[test]
fn finds_author_user() {
    create_empty_gitconfig();
    cargo_process("new foo").env("USER", "foo").run();

    let toml = paths::root().join("foo/Cargo.toml");
    let mut contents = String::new();
    File::open(&toml)
        .unwrap()
        .read_to_string(&mut contents)
        .unwrap();
    assert!(contents.contains(r#"authors = ["foo"]"#));
}

#[test]
fn finds_author_user_escaped() {
    create_empty_gitconfig();
    cargo_process("new foo").env("USER", "foo \"bar\"").run();

    let toml = paths::root().join("foo/Cargo.toml");
    let mut contents = String::new();
    File::open(&toml)
        .unwrap()
        .read_to_string(&mut contents)
        .unwrap();
    assert!(contents.contains(r#"authors = ["foo \"bar\""]"#));
}

#[test]
fn finds_author_username() {
    create_empty_gitconfig();
    cargo_process("new foo")
        .env_remove("USER")
        .env("USERNAME", "foo")
        .run();

    let toml = paths::root().join("foo/Cargo.toml");
    let mut contents = String::new();
    File::open(&toml)
        .unwrap()
        .read_to_string(&mut contents)
        .unwrap();
    assert!(contents.contains(r#"authors = ["foo"]"#));
}

#[test]
fn finds_author_priority() {
    cargo_process("new foo")
        .env("USER", "bar2")
        .env("EMAIL", "baz2")
        .env("CARGO_NAME", "bar")
        .env("CARGO_EMAIL", "baz")
        .run();

    let toml = paths::root().join("foo/Cargo.toml");
    let mut contents = String::new();
    File::open(&toml)
        .unwrap()
        .read_to_string(&mut contents)
        .unwrap();
    assert!(contents.contains(r#"authors = ["bar <baz>"]"#));
}

#[test]
fn finds_author_email() {
    create_empty_gitconfig();
    cargo_process("new foo")
        .env("USER", "bar")
        .env("EMAIL", "baz")
        .run();

    let toml = paths::root().join("foo/Cargo.toml");
    let mut contents = String::new();
    File::open(&toml)
        .unwrap()
        .read_to_string(&mut contents)
        .unwrap();
    assert!(contents.contains(r#"authors = ["bar <baz>"]"#));
}

#[test]
fn finds_author_git() {
    git_process("config --global user.name bar").exec().unwrap();
    git_process("config --global user.email baz")
        .exec()
        .unwrap();
    cargo_process("new foo").env("USER", "foo").run();

    let toml = paths::root().join("foo/Cargo.toml");
    let mut contents = String::new();
    File::open(&toml)
        .unwrap()
        .read_to_string(&mut contents)
        .unwrap();
    assert!(contents.contains(r#"authors = ["bar <baz>"]"#));
}

#[test]
fn finds_local_author_git() {
    git_process("init").exec().unwrap();
    git_process("config --global user.name foo").exec().unwrap();
    git_process("config --global user.email foo@bar")
        .exec()
        .unwrap();

    // Set local git user config
    git_process("config user.name bar").exec().unwrap();
    git_process("config user.email baz").exec().unwrap();
    cargo_process("init").env("USER", "foo").run();

    let toml = paths::root().join("Cargo.toml");
    let mut contents = String::new();
    File::open(&toml)
        .unwrap()
        .read_to_string(&mut contents)
        .unwrap();
    assert!(contents.contains(r#"authors = ["bar <baz>"]"#));
}

#[test]
fn finds_git_email() {
    cargo_process("new foo")
        .env("GIT_AUTHOR_NAME", "foo")
        .env("GIT_AUTHOR_EMAIL", "gitfoo")
        .run();

    let toml = paths::root().join("foo/Cargo.toml");
    let mut contents = String::new();
    File::open(&toml)
        .unwrap()
        .read_to_string(&mut contents)
        .unwrap();
    assert!(contents.contains(r#"authors = ["foo <gitfoo>"]"#), contents);
}

#[test]
fn finds_git_author() {
    create_empty_gitconfig();
    cargo_process("new foo")
        .env_remove("USER")
        .env("GIT_COMMITTER_NAME", "gitfoo")
        .run();

    let toml = paths::root().join("foo/Cargo.toml");
    let mut contents = String::new();
    File::open(&toml)
        .unwrap()
        .read_to_string(&mut contents)
        .unwrap();
    assert!(contents.contains(r#"authors = ["gitfoo"]"#));
}

#[test]
fn author_prefers_cargo() {
    git_process("config --global user.name foo").exec().unwrap();
    git_process("config --global user.email bar")
        .exec()
        .unwrap();
    let root = paths::root();
    fs::create_dir(&root.join(".cargo")).unwrap();
    File::create(&root.join(".cargo/config"))
        .unwrap()
        .write_all(
            br#"
        [cargo-new]
        name = "new-foo"
        email = "new-bar"
        vcs = "none"
    "#,
        )
        .unwrap();

    cargo_process("new foo").env("USER", "foo").run();

    let toml = paths::root().join("foo/Cargo.toml");
    let mut contents = String::new();
    File::open(&toml)
        .unwrap()
        .read_to_string(&mut contents)
        .unwrap();
    assert!(contents.contains(r#"authors = ["new-foo <new-bar>"]"#));
    assert!(!root.join("foo/.gitignore").exists());
}

#[test]
fn strip_angle_bracket_author_email() {
    create_empty_gitconfig();
    cargo_process("new foo")
        .env("USER", "bar")
        .env("EMAIL", "<baz>")
        .run();

    let toml = paths::root().join("foo/Cargo.toml");
    let mut contents = String::new();
    File::open(&toml)
        .unwrap()
        .read_to_string(&mut contents)
        .unwrap();
    assert!(contents.contains(r#"authors = ["bar <baz>"]"#));
}

#[test]
fn git_prefers_command_line() {
    let root = paths::root();
    fs::create_dir(&root.join(".cargo")).unwrap();
    File::create(&root.join(".cargo/config"))
        .unwrap()
        .write_all(
            br#"
        [cargo-new]
        vcs = "none"
        name = "foo"
        email = "bar"
    "#,
        )
        .unwrap();

    cargo_process("new foo --vcs git").env("USER", "foo").run();
    assert!(paths::root().join("foo/.gitignore").exists());
}

#[test]
fn subpackage_no_git() {
    cargo_process("new foo").env("USER", "foo").run();

    assert!(paths::root().join("foo/.git").is_dir());
    assert!(paths::root().join("foo/.gitignore").is_file());

    let subpackage = paths::root().join("foo").join("components");
    fs::create_dir(&subpackage).unwrap();
    cargo_process("new foo/components/subcomponent")
        .env("USER", "foo")
        .run();

    assert!(!paths::root()
        .join("foo/components/subcomponent/.git")
        .is_file());
    assert!(!paths::root()
        .join("foo/components/subcomponent/.gitignore")
        .is_file());
}

#[test]
fn subpackage_git_with_gitignore() {
    cargo_process("new foo").env("USER", "foo").run();

    assert!(paths::root().join("foo/.git").is_dir());
    assert!(paths::root().join("foo/.gitignore").is_file());

    let gitignore = paths::root().join("foo/.gitignore");
    fs::write(gitignore, b"components").unwrap();

    let subpackage = paths::root().join("foo/components");
    fs::create_dir(&subpackage).unwrap();
    cargo_process("new foo/components/subcomponent")
        .env("USER", "foo")
        .run();

    assert!(paths::root()
        .join("foo/components/subcomponent/.git")
        .is_dir());
    assert!(paths::root()
        .join("foo/components/subcomponent/.gitignore")
        .is_file());
}

#[test]
fn subpackage_git_with_vcs_arg() {
    cargo_process("new foo").env("USER", "foo").run();

    let subpackage = paths::root().join("foo").join("components");
    fs::create_dir(&subpackage).unwrap();
    cargo_process("new foo/components/subcomponent --vcs git")
        .env("USER", "foo")
        .run();

    assert!(paths::root()
        .join("foo/components/subcomponent/.git")
        .is_dir());
    assert!(paths::root()
        .join("foo/components/subcomponent/.gitignore")
        .is_file());
}

#[test]
fn unknown_flags() {
    cargo_process("new foo --flag")
        .with_status(1)
        .with_stderr_contains(
            "error: Found argument '--flag' which wasn't expected, or isn't valid in this context",
        )
        .run();
}

#[test]
fn explicit_invalid_name_not_suggested() {
    cargo_process("new --name 10-invalid a")
        .with_status(101)
        .with_stderr("[ERROR] Package names starting with a digit cannot be used as a crate name")
        .run();
}

#[test]
fn explicit_project_name() {
    cargo_process("new --lib foo --name bar")
        .env("USER", "foo")
        .with_stderr("[CREATED] library `bar` package")
        .run();
}

#[test]
fn new_with_edition_2015() {
    cargo_process("new --edition 2015 foo")
        .env("USER", "foo")
        .run();
    let manifest = fs::read_to_string(paths::root().join("foo/Cargo.toml")).unwrap();
    assert!(manifest.contains("edition = \"2015\""));
}

#[test]
fn new_with_edition_2018() {
    cargo_process("new --edition 2018 foo")
        .env("USER", "foo")
        .run();
    let manifest = fs::read_to_string(paths::root().join("foo/Cargo.toml")).unwrap();
    assert!(manifest.contains("edition = \"2018\""));
}

#[test]
fn new_default_edition() {
    cargo_process("new foo").env("USER", "foo").run();
    let manifest = fs::read_to_string(paths::root().join("foo/Cargo.toml")).unwrap();
    assert!(manifest.contains("edition = \"2018\""));
}

#[test]
fn new_with_bad_edition() {
    cargo_process("new --edition something_else foo")
        .env("USER", "foo")
        .with_stderr_contains("error: 'something_else' isn't a valid value[..]")
        .with_status(1)
        .run();
}