//! Matrix coverage for `insert into T (vals)` (Form C — bare
//! value list, no `values` keyword).
//!
//! Form C shares the `( ... )` opener with Form A but resolves
//! the paren contents as values rather than column names. Per
//! handoff-12 §2.2 the Form C path is *type-unaware* — its
//! grammar uses the schemaless `INSERT_PAREN_LIST` shape, not
//! the typed `column_value_list`. Type validation happens at
//! bind time, not parse time.
//!
//! The previous commit's Form C/A disambiguation means
//! column-shaped items (idents) inside the parens now flag as
//! "did you mean Form A?". This file pins both the happy-path
//! (literals only) and the Form-A-recovery (column-shaped
//! items).

use crate::typing_surface::*;
use rdbms_playground::input_render::InputState;

#[test]
fn form_c_with_text_literals_parses() {
    let schema = schema_text_pk();
    let a = assess_at_end(
        "insert into Items ('SKU-1', 'Widget')",
        &schema,
    );
    assert!(matches!(a.state, InputState::Valid));
    assert_eq!(a.parse_result.as_deref(), Ok("Insert"));
    crate::snap!("form_c_text_literals", a);
}

#[test]
fn form_c_with_mixed_literals_parses() {
    let schema = schema_serial_pk();
    let a = assess_at_end(
        "insert into Customers (1, 'Alice', 'a@b.c')",
        &schema,
    );
    assert!(matches!(a.state, InputState::Valid));
    assert_eq!(a.parse_result.as_deref(), Ok("Insert"));
    crate::snap!("form_c_mixed_literals", a);
}

#[test]
fn form_c_with_null_first_parses() {
    let schema = schema_serial_pk();
    let a = assess_at_end(
        "insert into Customers (null, 'Alice', 'a@b.c')",
        &schema,
    );
    assert!(matches!(a.state, InputState::Valid));
    crate::snap!("form_c_null_first", a);
}

#[test]
fn form_c_with_column_shaped_item_flags_as_form_a_in_progress() {
    let schema = schema_serial_pk();
    let a = assess_at_end("insert into Customers (Name)", &schema);
    assert!(
        matches!(a.state, InputState::IncompleteAtEof),
        "expected IncompleteAtEof (Form A recovery), got {:?}",
        a.state,
    );
    assert_candidate_present(&a, &["values"]);
    crate::snap!("form_c_column_shaped_recovery", a);
}

#[test]
fn form_c_with_two_columns_flags_as_form_a_in_progress() {
    let schema = schema_serial_pk();
    let a = assess_at_end("insert into Customers (Name, Email)", &schema);
    assert!(matches!(a.state, InputState::IncompleteAtEof));
    assert_candidate_present(&a, &["values"]);
    crate::snap!("form_c_two_columns_recovery", a);
}

#[test]
fn form_c_type_unaware_grammar_accepts_decimal_for_int_column() {
    // Form C's grammar uses INSERT_PAREN_LIST (the pre-Phase-D
    // schemaless choice), so type mismatches aren't caught at
    // parse time. Bind time catches them. Handoff §2.2
    // documents this as known.
    let schema = schema_serial_pk();
    let a = assess_at_end(
        "insert into Customers (3.14, 'Alice', 'a@b.c')",
        &schema,
    );
    assert!(matches!(a.state, InputState::Valid));
    crate::snap!("form_c_type_unaware", a);
}

#[test]
fn form_c_in_progress_after_comma_is_incomplete() {
    let schema = schema_serial_pk();
    let a = assess_at_end("insert into Customers (1, ", &schema);
    assert!(matches!(a.state, InputState::IncompleteAtEof));
    crate::snap!("form_c_in_progress_after_comma", a);
}

#[test]
fn form_c_in_progress_without_close_paren_is_incomplete() {
    let schema = schema_serial_pk();
    let a = assess_at_end(
        "insert into Customers (1, 'Alice'",
        &schema,
    );
    assert!(matches!(a.state, InputState::IncompleteAtEof));
    crate::snap!("form_c_in_progress_no_close", a);
}