package generatedtext

import (
	"strings"
	"testing"
)

func TestValidateHourlyNormalizesJSON(t *testing.T) {
	value, normalized, err := ValidateHourly([]byte(`{
		"timing": "  main window late morning ",
		"summary": " Storm chances increase. ",
		"confidence": " Medium ",
		"impacts": " Brief downpours. "
	}`))
	if err != nil {
		t.Fatalf("ValidateHourly() error = %v", err)
	}
	if value.Summary != "Storm chances increase." {
		t.Fatalf("Summary = %q, want trimmed summary", value.Summary)
	}
	want := `{"summary":"Storm chances increase.","timing":"main window late morning","impacts":"Brief downpours.","confidence":"Medium"}`
	if string(normalized) != want {
		t.Fatalf("normalized = %s, want %s", normalized, want)
	}
}

func TestValidateHourlyOmitsEmptyConfidence(t *testing.T) {
	_, normalized, err := ValidateHourly([]byte(`{
		"summary": "Storm chances increase.",
		"timing": "Late morning.",
		"impacts": "Brief downpours.",
		"confidence": "   "
	}`))
	if err != nil {
		t.Fatalf("ValidateHourly() error = %v", err)
	}
	want := `{"summary":"Storm chances increase.","timing":"Late morning.","impacts":"Brief downpours."}`
	if string(normalized) != want {
		t.Fatalf("normalized = %s, want %s", normalized, want)
	}
}

func TestValidateHourlyRejectsInvalidInput(t *testing.T) {
	tests := []struct {
		name string
		in   string
		want string
	}{
		{
			name: "malformed",
			in:   `{`,
			want: "decode hourly generated text",
		},
		{
			name: "unknown field",
			in:   `{"summary":"Storm chances increase.","timing":"Late morning.","impacts":"Brief downpours.","extra":"value"}`,
			want: `unknown field "extra"`,
		},
		{
			name: "missing summary",
			in:   `{"timing":"Late morning.","impacts":"Brief downpours."}`,
			want: "summary is required",
		},
		{
			name: "blank timing",
			in:   `{"summary":"Storm chances increase.","timing":"  ","impacts":"Brief downpours."}`,
			want: "timing is required",
		},
		{
			name: "multiple values",
			in:   `{"summary":"Storm chances increase.","timing":"Late morning.","impacts":"Brief downpours."} {}`,
			want: "multiple JSON values",
		},
	}
	for _, test := range tests {
		t.Run(test.name, func(t *testing.T) {
			_, _, err := ValidateHourly([]byte(test.in))
			if err == nil {
				t.Fatal("ValidateHourly() error = nil, want error")
			}
			if !strings.Contains(err.Error(), test.want) {
				t.Fatalf("ValidateHourly() error = %v, want %q", err, test.want)
			}
		})
	}
}