use std::path::{Path, PathBuf};

use crate::rustc_stderr::Level;
use crate::rustc_stderr::Message;

use super::*;

fn config() -> Config {
    Config {
        root_dir: PathBuf::from("$RUSTROOT"),
        program: CommandBuilder::cmd("cake"),
        ..Config::rustc(PathBuf::new())
    }
}

#[test]
fn issue_2156() {
    let s = r"
use std::mem;

fn main() {
    let _x: &i32 = unsafe { mem::transmute(16usize) }; //~ ERROR: encountered a dangling reference (address $HEX is unallocated)
}
    ";
    let comments = Comments::parse(s).unwrap();
    let mut errors = vec![];
    let config = config();
    let messages = vec![
        vec![], vec![], vec![], vec![], vec![],
        vec![
            Message {
                message:"Undefined Behavior: type validation failed: encountered a dangling reference (address 0x10 is unallocated)".to_string(),
                level: Level::Error,
            }
        ]
    ];
    check_annotations(
        messages,
        vec![],
        Path::new("moobar"),
        &mut errors,
        &config,
        "",
        &comments,
    );
    match &errors[..] {
        [Error::PatternNotFound {
            definition_line: 5, ..
        }, Error::ErrorsWithoutPattern {
            path: Some((_, 5)), ..
        }] => {}
        _ => panic!("{:#?}", errors),
    }
}

#[test]
fn find_pattern() {
    let s = r"
use std::mem;

fn main() {
    let _x: &i32 = unsafe { mem::transmute(16usize) }; //~ ERROR: encountered a dangling reference (address 0x10 is unallocated)
}
    ";
    let comments = Comments::parse(s).unwrap();
    let config = config();
    {
        let messages = vec![vec![], vec![], vec![], vec![], vec![], vec![
                Message {
                    message: "Undefined Behavior: type validation failed: encountered a dangling reference (address 0x10 is unallocated)".to_string(),
                    level: Level::Error,
                }
            ]
        ];
        let mut errors = vec![];
        check_annotations(
            messages,
            vec![],
            Path::new("moobar"),
            &mut errors,
            &config,
            "",
            &comments,
        );
        match &errors[..] {
            [] => {}
            _ => panic!("{:#?}", errors),
        }
    }

    // only difference to above is a wrong line number
    {
        let messages = vec![vec![], vec![], vec![], vec![], vec![
                Message {
                    message: "Undefined Behavior: type validation failed: encountered a dangling reference (address 0x10 is unallocated)".to_string(),
                    level: Level::Error,
                }
            ]
        ];
        let mut errors = vec![];
        check_annotations(
            messages,
            vec![],
            Path::new("moobar"),
            &mut errors,
            &config,
            "",
            &comments,
        );
        match &errors[..] {
            [Error::PatternNotFound {
                definition_line: 5, ..
            }, Error::ErrorsWithoutPattern {
                path: Some((_, 4)), ..
            }] => {}
            _ => panic!("not the expected error: {:#?}", errors),
        }
    }

    // only difference to first is a wrong level
    {
        let messages = vec![
            vec![], vec![], vec![], vec![], vec![],
            vec![
                Message {
                    message: "Undefined Behavior: type validation failed: encountered a dangling reference (address 0x10 is unallocated)".to_string(),
                    level: Level::Note,
                }
            ]
        ];
        let mut errors = vec![];
        check_annotations(
            messages,
            vec![],
            Path::new("moobar"),
            &mut errors,
            &config,
            "",
            &comments,
        );
        match &errors[..] {
            // Note no `ErrorsWithoutPattern`, because there are no `//~NOTE` in the test file, so we ignore them
            [Error::PatternNotFound {
                definition_line: 5, ..
            }] => {}
            _ => panic!("not the expected error: {:#?}", errors),
        }
    }
}

#[test]
fn duplicate_pattern() {
    let s = r"
use std::mem;

fn main() {
    let _x: &i32 = unsafe { mem::transmute(16usize) }; //~ ERROR: encountered a dangling reference (address 0x10 is unallocated)
    //~^ ERROR: encountered a dangling reference (address 0x10 is unallocated)
}
    ";
    let comments = Comments::parse(s).unwrap();
    let config = config();
    let messages = vec![
        vec![], vec![], vec![], vec![], vec![],
        vec![
            Message {
                message: "Undefined Behavior: type validation failed: encountered a dangling reference (address 0x10 is unallocated)".to_string(),
                level: Level::Error,
            }
        ]
    ];
    let mut errors = vec![];
    check_annotations(
        messages,
        vec![],
        Path::new("moobar"),
        &mut errors,
        &config,
        "",
        &comments,
    );
    match &errors[..] {
        [Error::PatternNotFound {
            definition_line: 6, ..
        }] => {}
        _ => panic!("{:#?}", errors),
    }
}

#[test]
fn missing_pattern() {
    let s = r"
use std::mem;

fn main() {
    let _x: &i32 = unsafe { mem::transmute(16usize) }; //~ ERROR: encountered a dangling reference (address 0x10 is unallocated)
}
    ";
    let comments = Comments::parse(s).unwrap();
    let config = config();
    let messages = vec![
        vec![], vec![], vec![], vec![], vec![],
        vec![
            Message {
                message: "Undefined Behavior: type validation failed: encountered a dangling reference (address 0x10 is unallocated)".to_string(),
                level: Level::Error,
            },
            Message {
                message: "Undefined Behavior: type validation failed: encountered a dangling reference (address 0x10 is unallocated)".to_string(),
                level: Level::Error,
            }
        ]
    ];
    let mut errors = vec![];
    check_annotations(
        messages,
        vec![],
        Path::new("moobar"),
        &mut errors,
        &config,
        "",
        &comments,
    );
    match &errors[..] {
        [Error::ErrorsWithoutPattern {
            path: Some((_, 5)), ..
        }] => {}
        _ => panic!("{:#?}", errors),
    }
}

#[test]
fn missing_warn_pattern() {
    let s = r"
use std::mem;

fn main() {
    let _x: &i32 = unsafe { mem::transmute(16usize) }; //~ ERROR: encountered a dangling reference (address 0x10 is unallocated)
    //~^ WARN: cake
}
    ";
    let comments = Comments::parse(s).unwrap();
    let config = config();
    let messages= vec![
        vec![],
        vec![],
        vec![],
        vec![],
        vec![],
        vec![
            Message {
                message: "Undefined Behavior: type validation failed: encountered a dangling reference (address 0x10 is unallocated)".to_string(),
                level: Level::Error,
            },
            Message {
                message: "kaboom".to_string(),
                level: Level::Warn,
            },
            Message {
                message: "cake".to_string(),
                level: Level::Warn,
            },
        ],
    ];
    let mut errors = vec![];
    check_annotations(
        messages,
        vec![],
        Path::new("moobar"),
        &mut errors,
        &config,
        "",
        &comments,
    );
    match &errors[..] {
        [Error::ErrorsWithoutPattern {
            path: Some((_, 5)),
            msgs,
            ..
        }] => match &msgs[..] {
            [Message {
                message,
                level: Level::Warn,
            }] if message == "kaboom" => {}
            _ => panic!("{:#?}", msgs),
        },
        _ => panic!("{:#?}", errors),
    }
}

#[test]
fn missing_implicit_warn_pattern() {
    let s = r"
use std::mem;
//@require-annotations-for-level: ERROR
fn main() {
    let _x: &i32 = unsafe { mem::transmute(16usize) }; //~ ERROR: encountered a dangling reference (address 0x10 is unallocated)
    //~^ WARN: cake
}
    ";
    let comments = Comments::parse(s).unwrap();
    let config = config();
    let messages = vec![
        vec![],
        vec![],
        vec![],
        vec![],
        vec![],
        vec![
            Message {
                message: "Undefined Behavior: type validation failed: encountered a dangling reference (address 0x10 is unallocated)".to_string(),
                level: Level::Error,
            },
            Message {
                message: "kaboom".to_string(),
                level: Level::Warn,
            },
            Message {
                message: "cake".to_string(),
                level: Level::Warn,
            },
        ],
    ];
    let mut errors = vec![];
    check_annotations(
        messages,
        vec![],
        Path::new("moobar"),
        &mut errors,
        &config,
        "",
        &comments,
    );
    match &errors[..] {
        [] => {}
        _ => panic!("{:#?}", errors),
    }
}