use rustc_macros::Diagnostic;
use rustc_span::{Span, Symbol};

use crate::ty::Ty;

#[derive(Diagnostic)]
#[diag(middle_drop_check_overflow, code = "E0320")]
#[note]
pub struct DropCheckOverflow<'tcx> {
    #[primary_span]
    pub span: Span,
    pub ty: Ty<'tcx>,
    pub overflow_ty: Ty<'tcx>,
}

#[derive(Diagnostic)]
#[diag(middle_opaque_hidden_type_mismatch)]
pub struct OpaqueHiddenTypeMismatch<'tcx> {
    pub self_ty: Ty<'tcx>,
    pub other_ty: Ty<'tcx>,
    #[primary_span]
    #[label]
    pub other_span: Span,
    #[subdiagnostic]
    pub sub: TypeMismatchReason,
}

#[derive(Subdiagnostic)]
pub enum TypeMismatchReason {
    #[label(middle_conflict_types)]
    ConflictType {
        #[primary_span]
        span: Span,
    },
    #[note(middle_previous_use_here)]
    PreviousUse {
        #[primary_span]
        span: Span,
    },
}

#[derive(Diagnostic)]
#[diag(middle_limit_invalid)]
pub struct LimitInvalid<'a> {
    #[primary_span]
    pub span: Span,
    #[label]
    pub value_span: Span,
    pub error_str: &'a str,
}

#[derive(Diagnostic)]
#[diag(middle_recursion_limit_reached)]
#[help]
pub struct RecursionLimitReached<'tcx> {
    pub ty: Ty<'tcx>,
    pub suggested_limit: rustc_session::Limit,
}

#[derive(Diagnostic)]
#[diag(middle_const_eval_non_int)]
pub struct ConstEvalNonIntError {
    #[primary_span]
    pub span: Span,
}

#[derive(Diagnostic)]
#[diag(middle_strict_coherence_needs_negative_coherence)]
pub(crate) struct StrictCoherenceNeedsNegativeCoherence {
    #[primary_span]
    pub span: Span,
    #[label]
    pub attr_span: Option<Span>,
}

#[derive(Diagnostic)]
#[diag(middle_requires_lang_item)]
pub(crate) struct RequiresLangItem {
    #[primary_span]
    pub span: Option<Span>,
    pub name: Symbol,
}

#[derive(Diagnostic)]
#[diag(middle_const_not_used_in_type_alias)]
pub(super) struct ConstNotUsedTraitAlias {
    pub ct: String,
    #[primary_span]
    pub span: Span,
}