//! Matrix coverage for `add index [as <name>] on <T> (<col>, …)`
//! and `drop index (<name> | on <T> (<col>, …))` (ADR-0025).

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

#[test]
fn after_add_offers_index_branch() {
    let schema = schema_multi_table();
    let a = assess_at_end("add ", &schema);
    assert!(matches!(a.state, InputState::IncompleteAtEof));
    assert_candidate_present(&a, &["index"]);
    crate::snap!("after_add_index_branch", a);
}

#[test]
fn add_index_after_on_offers_table_names() {
    let schema = schema_multi_table();
    let a = assess_at_end("add index on ", &schema);
    assert!(matches!(a.state, InputState::IncompleteAtEof));
    assert_candidate_present(&a, &["Customers", "Orders"]);
    crate::snap!("add_index_after_on", a);
}

#[test]
fn add_index_open_paren_narrows_to_table_columns() {
    let schema = schema_multi_table();
    let a = assess_at_end("add index on Orders (", &schema);
    assert!(matches!(a.state, InputState::IncompleteAtEof));
    assert_candidate_present(&a, &["OrderId", "CustId", "Total"]);
    assert_no_candidate_named(&a, &["id", "Name"]);
    crate::snap!("add_index_open_paren", a);
}

#[test]
fn complete_add_index_parses() {
    let schema = schema_multi_table();
    let a = assess_at_end("add index on Orders (CustId)", &schema);
    assert!(matches!(a.state, InputState::Valid));
    assert_eq!(a.parse_result.as_deref(), Ok("AddIndex"));
    crate::snap!("add_index_complete", a);
}

#[test]
fn complete_add_index_named_parses() {
    let schema = schema_multi_table();
    let a = assess_at_end("add index as ord_cust on Orders (CustId)", &schema);
    assert!(matches!(a.state, InputState::Valid));
    assert_eq!(a.parse_result.as_deref(), Ok("AddIndex"));
    crate::snap!("add_index_named_complete", a);
}

#[test]
fn after_drop_offers_index_branch() {
    let schema = schema_multi_table();
    let a = assess_at_end("drop ", &schema);
    assert!(matches!(a.state, InputState::IncompleteAtEof));
    assert_candidate_present(&a, &["index"]);
    crate::snap!("drop_index_branch", a);
}

#[test]
fn complete_drop_index_by_name_parses() {
    let schema = schema_multi_table();
    let a = assess_at_end("drop index some_idx", &schema);
    assert!(matches!(a.state, InputState::Valid));
    assert_eq!(a.parse_result.as_deref(), Ok("DropIndex"));
    crate::snap!("drop_index_named_complete", a);
}

#[test]
fn complete_drop_index_by_columns_parses() {
    let schema = schema_multi_table();
    let a = assess_at_end("drop index on Orders (CustId)", &schema);
    assert!(matches!(a.state, InputState::Valid));
    assert_eq!(a.parse_result.as_deref(), Ok("DropIndex"));
    crate::snap!("drop_index_columns_complete", a);
}