package main

import (
	"os"
	"testing"

	"github.com/tetratelabs/wazero/internal/testing/require"
	"github.com/tetratelabs/wazero/internal/wasm"
)

// TestReRunFailedRequireNoDiffCase re-runs the failed case specified by WASM_BINARY_NAME in testdata directory.
func TestReRunFailedRequireNoDiffCase(t *testing.T) {
	binaryPath := os.Getenv("WASM_BINARY_PATH")

	wasmBin, err := os.ReadFile(binaryPath)
	if err != nil {
		t.Skip(err)
	}

	requireNoDiff(wasmBin, true, func(err error) { require.NoError(t, err) })
}

func Test_ensureMutableGlobalsMatch(t *testing.T) {
	for _, tc := range []struct {
		name   string
		cm, im *wasm.ModuleInstance
		expErr string
	}{
		{
			name: "no globals",
			cm:   &wasm.ModuleInstance{},
			im:   &wasm.ModuleInstance{},
		},
		{
			name: "i32 match",
			cm: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 10, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeI32}},
				},
			},
			im: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 10, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeI32}},
				},
			},
		},
		{
			name: "i32 match not match",
			cm: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 10, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeI32}},
				},
			},
			im: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 11, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeI32}},
				},
			},
			expErr: "mutable global[1] value mismatch: 10 != 11",
		},
		{
			name: "i64 match",
			cm: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 1 << 62, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeI64}},
				},
			},
			im: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 1 << 62, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeI64}},
				},
			},
		},
		{
			name: "i64 match not match",
			cm: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 1 << 62, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeI64}},
				},
			},
			im: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 1 << 63, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeI64}},
				},
			},
			expErr: "mutable global[2] value mismatch: 4611686018427387904 != 9223372036854775808",
		},
		{
			name: "f32 match",
			cm: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 10, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeF32}},
				},
			},
			im: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 10, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeF32}},
				},
			},
		},
		{
			name: "f32 match not match",
			cm: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 10, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeF32}},
				},
			},
			im: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 11, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeF32}},
				},
			},
			expErr: "mutable global[1] value mismatch: 10 != 11",
		},
		{
			name: "f64 match",
			cm: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 1 << 62, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeF64}},
				},
			},
			im: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 1 << 62, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeF64}},
				},
			},
		},
		{
			name: "f64 match not match",
			cm: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 1 << 62, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeF64}},
				},
			},
			im: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 1 << 63, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeF64}},
				},
			},
			expErr: "mutable global[2] value mismatch: 4611686018427387904 != 9223372036854775808",
		},

		{
			name: "v128 match",
			cm: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{ValHi: 1 << 62, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeV128}},
				},
			},
			im: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{ValHi: 1 << 62, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeV128}},
				},
			},
		},
		{
			name: "v128 match not match",
			cm: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 1 << 62, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeV128}},
				},
			},
			im: &wasm.ModuleInstance{
				Globals: []*wasm.GlobalInstance{
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Type: wasm.GlobalType{ValType: wasm.ValueTypeV128}},
					{Val: 1 << 62, ValHi: 1234, Type: wasm.GlobalType{Mutable: true, ValType: wasm.ValueTypeV128}},
				},
			},
			expErr: "mutable global[2] value mismatch: (4611686018427387904,0) != (4611686018427387904,1234)",
		},
	} {
		t.Run(tc.name, func(t *testing.T) {
			var actualErr error
			ensureMutableGlobalsMatch(tc.cm, tc.im, func(err error) {
				actualErr = err
			})
			if tc.expErr == "" {
				require.NoError(t, actualErr)
			} else {
				require.Equal(t, tc.expErr, actualErr.Error())
			}
		})
	}
}