package sandbox

import (
	"context"
	"testing"

	"go.starlark.net/starlark"
)

func runFormsScript(t *testing.T, script string) starlark.StringDict {
	t.Helper()
	mod := BuildFormsModule(context.Background())
	predeclared := starlark.StringDict{"forms": mod}
	globals, err := starlark.ExecFile(&starlark.Thread{Name: "test"}, "test.star", script, predeclared)
	if err != nil {
		t.Fatal(err)
	}
	return globals
}

func TestFormsModule_ValidateValid(t *testing.T) {
	globals := runFormsScript(t, `
tpl = {
    "fields": [
        {"key": "name", "type": "text", "label": "Name", "required": True},
        {"key": "email", "type": "email", "label": "Email"},
    ]
}
result = forms.validate(tpl, {"name": "Alice", "email": "alice@example.com"})
`)
	result := globals["result"].(*starlark.Dict)
	valid, _, _ := result.Get(starlark.String("valid"))
	if valid != starlark.True {
		t.Fatalf("expected valid=True, got %v", valid)
	}
	errors, _, _ := result.Get(starlark.String("errors"))
	errList := errors.(*starlark.List)
	if errList.Len() != 0 {
		t.Fatalf("expected 0 errors, got %d", errList.Len())
	}
}

func TestFormsModule_ValidateRequired(t *testing.T) {
	globals := runFormsScript(t, `
tpl = {
    "fields": [
        {"key": "name", "type": "text", "label": "Name", "required": True},
    ]
}
result = forms.validate(tpl, {})
`)
	result := globals["result"].(*starlark.Dict)
	valid, _, _ := result.Get(starlark.String("valid"))
	if valid != starlark.False {
		t.Fatalf("expected valid=False, got %v", valid)
	}
	errors, _, _ := result.Get(starlark.String("errors"))
	errList := errors.(*starlark.List)
	if errList.Len() != 1 {
		t.Fatalf("expected 1 error, got %d", errList.Len())
	}
	errDict := errList.Index(0).(*starlark.Dict)
	key, _, _ := errDict.Get(starlark.String("key"))
	if key.(starlark.String).GoString() != "name" {
		t.Fatalf("expected error key 'name', got %v", key)
	}
}

func TestFormsModule_ValidateTypeErrors(t *testing.T) {
	globals := runFormsScript(t, `
tpl = {
    "fields": [
        {"key": "age", "type": "number", "label": "Age", "validation": {"min": 0, "max": 150}},
        {"key": "email", "type": "email", "label": "Email"},
    ]
}
result = forms.validate(tpl, {"age": -5, "email": "bad"})
`)
	result := globals["result"].(*starlark.Dict)
	valid, _, _ := result.Get(starlark.String("valid"))
	if valid != starlark.False {
		t.Fatalf("expected valid=False, got %v", valid)
	}
	errors, _, _ := result.Get(starlark.String("errors"))
	errList := errors.(*starlark.List)
	if errList.Len() != 2 {
		t.Fatalf("expected 2 errors, got %d", errList.Len())
	}
}

func TestFormsModule_ValidateCondition(t *testing.T) {
	globals := runFormsScript(t, `
tpl = {
    "fields": [
        {"key": "type", "type": "text", "label": "Type"},
        {"key": "details", "type": "text", "label": "Details", "required": True,
         "condition": {"when": "type", "op": "eq", "value": "other"}},
    ]
}
# Condition not met — details not required
result1 = forms.validate(tpl, {"type": "normal"})
# Condition met — details required
result2 = forms.validate(tpl, {"type": "other"})
`)
	result1 := globals["result1"].(*starlark.Dict)
	valid1, _, _ := result1.Get(starlark.String("valid"))
	if valid1 != starlark.True {
		t.Fatalf("result1: expected valid=True, got %v", valid1)
	}

	result2 := globals["result2"].(*starlark.Dict)
	valid2, _, _ := result2.Get(starlark.String("valid"))
	if valid2 != starlark.False {
		t.Fatalf("result2: expected valid=False, got %v", valid2)
	}
}