package spc

import (
	"strings"
	"testing"
	"time"
)

func TestExtractProductTextCleansPreBlock(t *testing.T) {
	raw := string(readTestFile(t, "day1_prt.html"))

	got, err := ExtractProductText(raw)
	if err != nil {
		t.Fatalf("ExtractProductText() error = %v", err)
	}
	if strings.Contains(got, "<script") || strings.Contains(got, "<pre") {
		t.Fatalf("ExtractProductText() retained HTML: %q", got)
	}
	if strings.Contains(got, "ignore me") {
		t.Fatalf("ExtractProductText() retained script content: %q", got)
	}
	if !strings.Contains(got, "Day 1 Convective Outlook") {
		t.Fatalf("ExtractProductText() missing headline: %q", got)
	}
	if strings.HasPrefix(got, "\n") || strings.HasSuffix(got, "\n") {
		t.Fatalf("ExtractProductText() retained surrounding blank lines: %q", got)
	}
}

func TestParseDiscussionTextExtractsHeadlineSummaryAndUpdated(t *testing.T) {
	text, err := ExtractProductText(string(readTestFile(t, "day1_prt.html")))
	if err != nil {
		t.Fatalf("ExtractProductText() error = %v", err)
	}

	got := ParseDiscussionText(text)
	if got.ProductTitle != "Day 1 Convective Outlook" {
		t.Fatalf("ProductTitle = %q", got.ProductTitle)
	}
	if got.Headline != "Day 1 Convective Outlook" {
		t.Fatalf("Headline = %q", got.Headline)
	}
	wantSummary := "Severe thunderstorms are possible across parts of the central Plains\nand mid Mississippi Valley this afternoon and evening."
	if got.Summary != wantSummary {
		t.Fatalf("Summary = %q, want %q", got.Summary, wantSummary)
	}
	if !strings.Contains(got.Discussion, "...DISCUSSION...") {
		t.Fatalf("Discussion missing full text: %q", got.Discussion)
	}
	wantUpdated := time.Date(2026, 6, 11, 12, 45, 0, 0, time.UTC)
	if got.UpdatedAt == nil || !got.UpdatedAt.Equal(wantUpdated) {
		t.Fatalf("UpdatedAt = %v, want %s", got.UpdatedAt, wantUpdated)
	}
}

func TestParseDiscussionTextPreservesCorrectionMarker(t *testing.T) {
	text, err := ExtractProductText(string(readTestFile(t, "day2_prt_corr.html")))
	if err != nil {
		t.Fatalf("ExtractProductText() error = %v", err)
	}

	got := ParseDiscussionText(text)
	if !strings.Contains(got.Headline, "CORR 1") {
		t.Fatalf("Headline = %q, want correction marker", got.Headline)
	}
	if !strings.Contains(got.Discussion, "CORR 1") {
		t.Fatalf("Discussion = %q, want correction marker", got.Discussion)
	}
	if got.UpdatedAt != nil {
		t.Fatalf("UpdatedAt = %v, want nil", got.UpdatedAt)
	}
}

func TestParseUpdatedTimestampReturnsNilWhenAbsent(t *testing.T) {
	text, err := ExtractProductText(string(readTestFile(t, "day2_prt_corr.html")))
	if err != nil {
		t.Fatalf("ExtractProductText() error = %v", err)
	}
	if got := ParseUpdatedTimestamp(text); got != nil {
		t.Fatalf("ParseUpdatedTimestamp() = %v, want nil", got)
	}
}

func TestParseUpdatedTimestampAcceptsSPCUTCFormat(t *testing.T) {
	got := ParseUpdatedTimestamp("Updated: 1945 UTC Thu Jun 11 2026")
	want := time.Date(2026, 6, 11, 19, 45, 0, 0, time.UTC)
	if got == nil || !got.Equal(want) {
		t.Fatalf("ParseUpdatedTimestamp() = %v, want %s", got, want)
	}
}