package reporttemplate

import (
	"encoding/json"
	"os"
	"strings"
	"testing"
)

func TestTemplateLookup(t *testing.T) {
	source, err := Template("hourly")
	if err != nil {
		t.Fatalf("Template() error = %v", err)
	}
	for _, want := range []string{"# {{ .Report.Title }}", "**Updated:**", `{{ template "alert_digest" . }}`, "## Current Conditions", "## Hourly Forecast", "## Forecast Discussion"} {
		if !strings.Contains(source, want) {
			t.Fatalf("template missing %q:\n%s", want, source)
		}
	}
}

func TestTomorrowTemplateLookup(t *testing.T) {
	source, err := Template("tomorrow")
	if err != nil {
		t.Fatalf("Template() error = %v", err)
	}
	for _, want := range []string{"# {{ .Report.Title }}", "**Forecast date:**", `{{ template "alert_digest" . }}`, `{{ template "daypart_forecast" . }}`, `{{ template "precipitation_timing" . }}`, "## Forecast Discussion"} {
		if !strings.Contains(source, want) {
			t.Fatalf("template missing %q:\n%s", want, source)
		}
	}
}

func TestDailyTemplateLookup(t *testing.T) {
	source, err := Template("daily")
	if err != nil {
		t.Fatalf("Template() error = %v", err)
	}
	for _, want := range []string{"# {{ .Report.Title }}", "**Forecast date:**", `{{ template "alert_digest" . }}`, `{{ template "daypart_forecast" . }}`, `{{ template "precipitation_timing" . }}`, "## Forecast Discussion"} {
		if !strings.Contains(source, want) {
			t.Fatalf("template missing %q:\n%s", want, source)
		}
	}
}

func TestTodayTemplateLookup(t *testing.T) {
	source, err := Template("today")
	if err != nil {
		t.Fatalf("Template() error = %v", err)
	}
	for _, want := range []string{"# {{ .Report.Title }}", "**Forecast date:**", `{{ template "alert_digest" . }}`, "## Current Conditions", `{{ template "today_daypart_forecast" . }}`, `{{ template "precipitation_timing" . }}`, "## Forecast Discussion"} {
		if !strings.Contains(source, want) {
			t.Fatalf("template missing %q:\n%s", want, source)
		}
	}
	if strings.Contains(source, "## Planning Notes") {
		t.Fatalf("template includes Planning Notes section:\n%s", source)
	}
}

func TestSchemaLookup(t *testing.T) {
	data, err := Schema("hourly")
	if err != nil {
		t.Fatalf("Schema() error = %v", err)
	}
	assertStringSchema(t, data, "summary,forecast_discussion", []string{"summary", "forecast_discussion", "precipitation_timing", "confidence"})
}

func TestTomorrowSchemaLookup(t *testing.T) {
	data, err := Schema("tomorrow")
	if err != nil {
		t.Fatalf("Schema() error = %v", err)
	}
	schema := assertSchema(t, data, "summary,forecast_discussion")
	property, ok := schema.Properties["forecast_discussion"].(map[string]any)
	if !ok {
		t.Fatal("schema property forecast_discussion missing or invalid")
	}
	if property["type"] != "array" {
		t.Fatalf("forecast_discussion type = %v, want array", property["type"])
	}
	if property["minItems"] != float64(1) {
		t.Fatalf("forecast_discussion minItems = %v, want 1", property["minItems"])
	}
	items, ok := property["items"].(map[string]any)
	if !ok || items["type"] != "string" {
		t.Fatalf("forecast_discussion items = %#v, want string items", property["items"])
	}
	for _, field := range []string{"summary", "precipitation_timing", "confidence"} {
		property, ok := schema.Properties[field].(map[string]any)
		if !ok {
			t.Fatalf("schema property %q missing or invalid", field)
		}
		if property["type"] != "string" {
			t.Fatalf("schema property %q type = %v, want string", field, property["type"])
		}
	}
}

func TestDailySchemaLookup(t *testing.T) {
	data, err := Schema("daily")
	if err != nil {
		t.Fatalf("Schema() error = %v", err)
	}
	schema := assertSchema(t, data, "summary,forecast_discussion")
	property, ok := schema.Properties["forecast_discussion"].(map[string]any)
	if !ok {
		t.Fatal("schema property forecast_discussion missing or invalid")
	}
	if property["type"] != "array" {
		t.Fatalf("forecast_discussion type = %v, want array", property["type"])
	}
	if property["minItems"] != float64(1) {
		t.Fatalf("forecast_discussion minItems = %v, want 1", property["minItems"])
	}
	items, ok := property["items"].(map[string]any)
	if !ok || items["type"] != "string" {
		t.Fatalf("forecast_discussion items = %#v, want string items", property["items"])
	}
	for _, field := range []string{"summary", "precipitation_timing", "confidence"} {
		property, ok := schema.Properties[field].(map[string]any)
		if !ok {
			t.Fatalf("schema property %q missing or invalid", field)
		}
		if property["type"] != "string" {
			t.Fatalf("schema property %q type = %v, want string", field, property["type"])
		}
	}
}

func TestTodaySchemaLookup(t *testing.T) {
	data, err := Schema("today")
	if err != nil {
		t.Fatalf("Schema() error = %v", err)
	}
	schema := assertSchema(t, data, "summary,forecast_discussion")
	property, ok := schema.Properties["forecast_discussion"].(map[string]any)
	if !ok {
		t.Fatal("schema property forecast_discussion missing or invalid")
	}
	if property["type"] != "array" {
		t.Fatalf("forecast_discussion type = %v, want array", property["type"])
	}
	if property["minItems"] != float64(1) {
		t.Fatalf("forecast_discussion minItems = %v, want 1", property["minItems"])
	}
	items, ok := property["items"].(map[string]any)
	if !ok || items["type"] != "string" {
		t.Fatalf("forecast_discussion items = %#v, want string items", property["items"])
	}
	for _, field := range []string{"summary", "precipitation_timing", "confidence"} {
		property, ok := schema.Properties[field].(map[string]any)
		if !ok {
			t.Fatalf("schema property %q missing or invalid", field)
		}
		if property["type"] != "string" {
			t.Fatalf("schema property %q type = %v, want string", field, property["type"])
		}
	}
}

func assertStringSchema(t *testing.T, data []byte, required string, fields []string) {
	t.Helper()
	schema := assertSchema(t, data, required)
	for _, field := range fields {
		property, ok := schema.Properties[field].(map[string]any)
		if !ok {
			t.Fatalf("schema property %q missing or invalid", field)
		}
		if property["type"] != "string" {
			t.Fatalf("schema property %q type = %v, want string", field, property["type"])
		}
	}
}

func assertSchema(t *testing.T, data []byte, required string) struct {
	Type                 string         `json:"type"`
	AdditionalProperties bool           `json:"additionalProperties"`
	Required             []string       `json:"required"`
	Properties           map[string]any `json:"properties"`
} {
	t.Helper()
	var schema struct {
		Type                 string         `json:"type"`
		AdditionalProperties bool           `json:"additionalProperties"`
		Required             []string       `json:"required"`
		Properties           map[string]any `json:"properties"`
	}
	if err := json.Unmarshal(data, &schema); err != nil {
		t.Fatalf("schema is invalid JSON: %v", err)
	}
	if schema.Type != "object" {
		t.Fatalf("schema type = %q, want object", schema.Type)
	}
	if schema.AdditionalProperties {
		t.Fatal("additionalProperties = true, want false")
	}
	if strings.Join(schema.Required, ",") != required {
		t.Fatalf("required = %#v, want %s", schema.Required, required)
	}
	return schema
}

func TestRenderHourly(t *testing.T) {
	rendered, err := Render("hourly", testRenderContext{
		Report: testReportContext{
			Title:            "Hourly Report",
			LocationName:     "Brentwood",
			ValidPeriodLabel: "May 29, 8:30 AM to 2:30 PM",
			GeneratedAtLabel: "Saturday, June 14, 2026 at 9:14 AM",
		},
		GeneratedText: testGeneratedText{
			Summary:             "Storm chances increase through late morning.",
			ForecastDiscussion:  "A front will keep the region unsettled.",
			PrecipitationTiming: "A cold front is moving into the region.",
			Confidence:          "Medium confidence in timing.",
		},
		Modules: testModules{
			CurrentConditions: &testCurrentConditions{
				ConditionText:           "Partly cloudy",
				ConditionTextLower:      "partly cloudy",
				TemperatureF:            intPtr(74),
				ApparentTemperatureF:    intPtr(76),
				RelativeHumidityPercent: intPtr(71),
				WindDirection:           "S",
				WindDirectionText:       "south",
				WindSpeedMph:            intPtr(8),
			},
			HourlyForecast: &testHourlyForecast{
				Periods: []testHourlyPeriod{
					{HourLabel: "9:00 AM", TextDescription: "Cloudy", TextDescriptionLower: "cloudy", TemperatureF: floatPtr(74), ProbabilityOfPrecipitationPercent: floatPtr(19), WindDirection: "S", WindSpeedMph: floatPtr(8)},
					{HourLabel: "10:00 AM", TextDescription: "Showers", TextDescriptionLower: "showers", TemperatureF: floatPtr(75), ProbabilityOfPrecipitationPercent: floatPtr(70), MentionPrecipitation: true, WindDirection: "S", WindSpeedMph: floatPtr(10)},
				},
			},
			PrecipTiming: &testPrecipTiming{
				MaxPopPercent: intPtr(70),
				MaxPopTime:    "10 AM",
				PrecipitationWindows: []testPrecipWindow{
					{PeriodBegins: "10 AM", PeriodBeginsHourLabel: "10:00 AM", PeriodEnds: "12 PM", PeriodEndsHourLabel: "12:00 PM", MaxPopPercent: intPtr(70), MaxPopTime: "10 AM", MaxPopHourLabel: "10:00 AM", ExpectationPhrase: "Expect showers."},
				},
			},
			AlertDigest: &testAlertDigest{
				Relevant: []testAlert{{Event: "Flood Watch", Headline: "Flood Watch until 2:30 PM", Severity: "Moderate", PeriodBegins: "May 29 at 10:00 AM", PeriodEnds: "May 29 at 2:30 PM", Instruction: "Avoid low-water crossings."}},
			},
			SPCConvectiveOutlooks: &testSPCOutlooks{
				Outlooks:   []testSPCOutlook{{LabelText: "Slight Risk", PeriodBegins: "8 AM", PeriodEnds: "2 PM"}},
				RiskDigest: []testSPCRiskDigest{{LabelText: "Slight Risk", RiskLabel: "Slight risk", PeriodBegins: "May 29 at 8:00 AM", PeriodEnds: "May 29 at 2:00 PM"}},
			},
			SPCConvectiveDiscussion: &testSPCDiscussion{
				Discussions: []testSPCDiscussionRecord{{Summary: "Strong storms may develop late morning."}},
			},
			AreaForecastDiscussion: &testForecastDiscussion{
				KeyMessages: []string{"Storms are most likely late morning."},
				ShortTerm:   "Short-term discussion favors increasing rain coverage.",
			},
			WeatherStory: &testWeatherStory{
				Available:   true,
				Title:       "Morning storms",
				Description: "Morning storms remain the main story.",
			},
		},
	})
	if err != nil {
		t.Fatalf("Render() error = %v", err)
	}
	text := string(rendered)
	for _, want := range []string{
		"# Hourly Report",
		"**Updated:** Saturday, June 14, 2026 at 9:14 AM",
		"Storm chances increase through late morning.",
		"Currently, it is 74°F and partly cloudy. It feels like 76°F, with a relative humidity of 71% and winds from the south at 8 mph.",
		"## Alert Digest",
		"- **Flood Watch**: Flood Watch in effect from May 29 at 10:00 AM to May 29 at 2:30 PM. Avoid low-water crossings.",
		"- **SPC Convective Outlook**: Slight risk for severe thunderstorms in effect from May 29 at 8:00 AM to May 29 at 2:00 PM.",
		"- **9:00 AM:** 74°F and cloudy.",
		"- **10:00 AM:** 75°F and showers. Probability of precipitation is 70%.",
		"- **10:00 AM** to **12:00 PM**: Expect showers. The peak precipitation chance is 70% at 10:00 AM.",
		"A cold front is moving into the region.",
		"A front will keep the region unsettled.",
	} {
		if !strings.Contains(text, want) {
			t.Fatalf("rendered template missing %q:\n%s", want, text)
		}
	}
	if strings.Contains(text, "19%") || strings.Contains(text, "wind S") || strings.Contains(text, "## Confidence") {
		t.Fatalf("rendered template included omitted details:\n%s", text)
	}
	assertOrderedText(t, text, []string{
		"# Hourly Report",
		"## Alert Digest",
		"## Current Conditions",
		"## Hourly Forecast",
		"## Precipitation Timing",
		"## Forecast Discussion",
	})
}

func TestRenderTomorrow(t *testing.T) {
	rendered, err := Render("tomorrow", testTomorrowRenderContext{
		Report: testTomorrowReportContext{
			Title:             "Monday's Weather",
			ForecastDateLabel: "Monday, June 15, 2026",
			GeneratedAtLabel:  "Sunday, June 14, 2026 at 9:14 AM",
		},
		GeneratedText: testTomorrowGeneratedText{
			Summary: "Tomorrow starts dry before showers return later in the day.",
			ForecastDiscussion: []string{
				"Clouds increase after sunrise.",
				"Rain chances peak during the afternoon.",
			},
			PrecipitationTiming: "A few showers may linger into early evening.",
		},
		Modules: testTomorrowModules{
			Dayparts: []testTomorrowDaypart{
				{
					Key: "overnight",
					Summary: testDaypartSummary{
						DisplayName:              "Overnight",
						TemperatureTrend:         "falling",
						TemperatureStartPhraseF:  "mid 60s",
						TemperatureEndPhraseF:    "upper 50s",
						DominantConditionDisplay: "Partly cloudy",
						DominantConditionLower:   "partly cloudy",
					},
				},
				{
					Key: "morning",
					Summary: testDaypartSummary{
						DisplayName:              "Morning",
						TemperatureTrend:         "rising",
						TemperatureStartPhraseF:  "upper 50s",
						TemperatureEndPhraseF:    "upper 60s",
						DominantConditionDisplay: "Sunny",
						DominantConditionLower:   "sunny",
					},
				},
				{
					Key: "afternoon",
					Summary: testDaypartSummary{
						DisplayName:              "Afternoon",
						TemperatureTrend:         "steady",
						TemperatureSteadyPhraseF: "upper 70s",
						DominantConditionDisplay: "Sunny",
						DominantConditionLower:   "sunny",
						MaxPopPercent:            intPtr(70),
						MaxPopTimeLabel:          "3:00 PM",
						MentionPrecipitation:     true,
					},
				},
			},
			PrecipTiming: &testPrecipTiming{
				PrecipitationWindows: []testPrecipWindow{
					{PeriodBeginsHourLabel: "3:00 PM", PeriodEndsHourLabel: "6:00 PM", MaxPopPercent: intPtr(70), MaxPopHourLabel: "3:00 PM", ExpectationPhrase: "Expect showers."},
				},
			},
			AlertDigest: &testAlertDigest{
				Relevant: []testAlert{{Event: "Wind Advisory", Headline: "Wind Advisory until 8:00 PM", Severity: "Moderate", PeriodBegins: "June 15 at 1:00 PM", PeriodEnds: "June 15 at 8:00 PM", Instruction: "Secure outdoor objects."}},
			},
			SPCConvectiveOutlooks: &testSPCOutlooks{
				RiskDigest: []testSPCRiskDigest{{LabelText: "Slight Risk", RiskLabel: "Slight risk", PeriodBegins: "June 15 at 7:00 AM", PeriodEnds: "June 16 at 7:00 AM"}},
			},
		},
	})
	if err != nil {
		t.Fatalf("Render() error = %v", err)
	}
	text := string(rendered)
	for _, want := range []string{
		"# Monday's Weather",
		"**Forecast date:** Monday, June 15, 2026",
		"**Updated:** Sunday, June 14, 2026 at 9:14 AM",
		"Tomorrow starts dry before showers return later in the day.",
		"## Alert Digest",
		"- **Wind Advisory**: Wind Advisory in effect from June 15 at 1:00 PM to June 15 at 8:00 PM. Secure outdoor objects.",
		"- **SPC Convective Outlook**: Slight risk for severe thunderstorms in effect from June 15 at 7:00 AM to June 16 at 7:00 AM.",
		"- **Overnight:** Partly cloudy, with temperatures falling from the mid 60s to the upper 50s.",
		"- **Morning:** Sunny, with temperatures rising from the upper 50s to the upper 60s.",
		"- **Afternoon:** Sunny, with temperatures in the upper 70s. Chance of precipitation is 70%.",
		"- **3:00 PM** to **6:00 PM**: Expect showers. The peak precipitation chance is 70% at 3:00 PM.",
		"A few showers may linger into early evening.",
		"Clouds increase after sunrise.",
		"Rain chances peak during the afternoon.",
	} {
		if !strings.Contains(text, want) {
			t.Fatalf("rendered template missing %q:\n%s", want, text)
		}
	}
	for _, unwanted := range []string{
		"upper 50s.\n\n- **Morning:**",
		"upper 60s.\n\n- **Afternoon:**",
	} {
		if strings.Contains(text, unwanted) {
			t.Fatalf("rendered template includes blank lines between daypart bullets:\n%s", text)
		}
	}
	assertOrderedText(t, text, []string{
		"# Monday's Weather",
		"Tomorrow starts dry before showers return later in the day.",
		"## Alert Digest",
		"## Daypart Forecast",
		"- **Overnight:**",
		"- **Morning:**",
		"- **Afternoon:**",
		"## Precipitation Timing",
		"## Forecast Discussion",
		"Clouds increase after sunrise.",
		"Rain chances peak during the afternoon.",
	})
}

func TestRenderDaily(t *testing.T) {
	rendered, err := Render("daily", testDailyRenderContext{
		Report: testDailyReportContext{
			Title:             "Monday's Weather",
			ForecastDateLabel: "Monday, June 15, 2026",
			GeneratedAtLabel:  "Sunday, June 14, 2026 at 9:14 AM",
		},
		GeneratedText: testDailyGeneratedText{
			Summary: "The selected day starts dry before showers return later in the day.",
			ForecastDiscussion: []string{
				"Clouds increase after sunrise.",
				"Rain chances peak during the afternoon.",
			},
			PrecipitationTiming: "A few showers may linger into early evening.",
		},
		Modules: testDailyModules{
			Dayparts: []testDailyDaypart{
				{
					Key: "morning",
					Summary: testDaypartSummary{
						DisplayName:              "Morning",
						TemperatureTrend:         "rising",
						TemperatureStartPhraseF:  "upper 50s",
						TemperatureEndPhraseF:    "upper 60s",
						DominantConditionDisplay: "Sunny",
						DominantConditionLower:   "sunny",
					},
				},
				{
					Key: "afternoon",
					Summary: testDaypartSummary{
						DisplayName:              "Afternoon",
						TemperatureTrend:         "steady",
						TemperatureSteadyPhraseF: "upper 70s",
						DominantConditionDisplay: "Showers",
						DominantConditionLower:   "showers",
						MaxPopPercent:            intPtr(70),
						MaxPopTimeLabel:          "3:00 PM",
						MentionPrecipitation:     true,
					},
				},
			},
			PrecipTiming: &testPrecipTiming{
				PrecipitationWindows: []testPrecipWindow{
					{PeriodBeginsHourLabel: "3:00 PM", PeriodEndsHourLabel: "6:00 PM", MaxPopPercent: intPtr(70), MaxPopHourLabel: "3:00 PM", ExpectationPhrase: "Expect showers."},
				},
			},
			AlertDigest: &testAlertDigest{
				Relevant: []testAlert{{Event: "Flood Watch", Headline: "Flood Watch until 6:00 PM", Severity: "Moderate", PeriodBegins: "June 15 at 3:00 PM", PeriodEnds: "June 15 at 6:00 PM", Description: "Monitor creek levels."}},
			},
			SPCConvectiveOutlooks: &testSPCOutlooks{
				RiskDigest: []testSPCRiskDigest{{LabelText: "Enhanced Risk", RiskLabel: "Enhanced risk", PeriodBegins: "June 15 at 7:00 AM", PeriodEnds: "June 16 at 7:00 AM"}},
			},
		},
	})
	if err != nil {
		t.Fatalf("Render() error = %v", err)
	}
	text := string(rendered)
	for _, want := range []string{
		"# Monday's Weather",
		"**Forecast date:** Monday, June 15, 2026",
		"**Updated:** Sunday, June 14, 2026 at 9:14 AM",
		"The selected day starts dry before showers return later in the day.",
		"## Alert Digest",
		"- **Flood Watch**: Flood Watch in effect from June 15 at 3:00 PM to June 15 at 6:00 PM. Monitor creek levels.",
		"- **SPC Convective Outlook**: Enhanced risk for severe thunderstorms in effect from June 15 at 7:00 AM to June 16 at 7:00 AM.",
		"- **Morning:** Sunny, with temperatures rising from the upper 50s to the upper 60s.",
		"- **Afternoon:** Showers, with temperatures in the upper 70s. Chance of precipitation is 70%.",
		"- **3:00 PM** to **6:00 PM**: Expect showers. The peak precipitation chance is 70% at 3:00 PM.",
		"A few showers may linger into early evening.",
		"Clouds increase after sunrise.",
		"Rain chances peak during the afternoon.",
	} {
		if !strings.Contains(text, want) {
			t.Fatalf("rendered template missing %q:\n%s", want, text)
		}
	}
	assertOrderedText(t, text, []string{
		"# Monday's Weather",
		"The selected day starts dry before showers return later in the day.",
		"## Alert Digest",
		"## Daypart Forecast",
		"- **Morning:**",
		"- **Afternoon:**",
		"## Precipitation Timing",
		"## Forecast Discussion",
	})
}

func TestRenderToday(t *testing.T) {
	rendered, err := Render("today", testTodayRenderContext{
		Report: testTodayReportContext{
			Title:             "Today's Weather",
			ForecastDateLabel: "Monday, June 15, 2026",
			GeneratedAtLabel:  "Monday, June 15, 2026 at 7:14 AM",
		},
		GeneratedText: testTomorrowGeneratedText{
			Summary: "Today starts dry before showers return later in the day.",
			ForecastDiscussion: []string{
				"Clouds increase after sunrise.",
				"Rain chances peak during the afternoon.",
			},
			PrecipitationTiming: "A few showers may linger into early evening.",
		},
		Modules: testTodayModules{
			CurrentConditions: &testCurrentConditions{
				ConditionTextLower:      "clear",
				TemperatureF:            intPtr(58),
				ApparentTemperatureF:    intPtr(57),
				RelativeHumidityPercent: intPtr(61),
				WindDirectionText:       "northwest",
				WindSpeedMph:            intPtr(9),
			},
			Dayparts: []testTomorrowDaypart{
				{
					Key: "morning",
					Summary: testDaypartSummary{
						DisplayName:              "Morning",
						TemperatureTrend:         "rising",
						TemperatureStartPhraseF:  "upper 50s",
						TemperatureEndPhraseF:    "upper 60s",
						DominantConditionDisplay: "Sunny",
						DominantConditionLower:   "sunny",
					},
				},
				{
					Key: "afternoon",
					Summary: testDaypartSummary{
						DisplayName:              "Afternoon",
						TemperatureTrend:         "steady",
						TemperatureSteadyPhraseF: "upper 70s",
						DominantConditionDisplay: "Showers",
						DominantConditionLower:   "showers",
						MaxPopPercent:            intPtr(70),
						MaxPopTimeLabel:          "3:00 PM",
						MentionPrecipitation:     true,
					},
				},
				{
					Key: "evening",
					Summary: testDaypartSummary{
						DisplayName: "Evening",
					},
				},
			},
			PrecipTiming: &testPrecipTiming{
				PrecipitationWindows: []testPrecipWindow{
					{PeriodBeginsHourLabel: "3:00 PM", PeriodEndsHourLabel: "6:00 PM", MaxPopPercent: intPtr(70), MaxPopHourLabel: "3:00 PM", ExpectationPhrase: "Expect showers."},
				},
			},
			AlertDigest: &testAlertDigest{
				Relevant: []testAlert{{Event: "Wind Advisory", Headline: "Wind Advisory until 8:00 PM", Severity: "Moderate", PeriodBegins: "June 15 at 1:00 PM", PeriodEnds: "June 15 at 8:00 PM", Instruction: "Secure outdoor objects."}},
			},
			SPCConvectiveOutlooks: &testSPCOutlooks{
				RiskDigest: []testSPCRiskDigest{{LabelText: "Slight Risk", RiskLabel: "Slight risk", PeriodBegins: "June 15 at 7:00 AM", PeriodEnds: "June 16 at 7:00 AM"}},
			},
			TodayPlanning: &testTodayPlanning{
				MorningReadiness:   []string{"Morning weather looks routine."},
				LateDayChangeWatch: []string{"Watch late-day shower timing."},
			},
		},
	})
	if err != nil {
		t.Fatalf("Render() error = %v", err)
	}
	text := string(rendered)
	for _, want := range []string{
		"# Today's Weather",
		"**Forecast date:** Monday, June 15, 2026",
		"**Updated:** Monday, June 15, 2026 at 7:14 AM",
		"Today starts dry before showers return later in the day.",
		"## Alert Digest",
		"- **Wind Advisory**: Wind Advisory in effect from June 15 at 1:00 PM to June 15 at 8:00 PM. Secure outdoor objects.",
		"- **SPC Convective Outlook**: Slight risk for severe thunderstorms in effect from June 15 at 7:00 AM to June 16 at 7:00 AM.",
		"Currently, it is 58°F and clear. It feels like 57°F, with a relative humidity of 61% and winds from the northwest at 9 mph.",
		"- **Morning:** Sunny, with temperatures rising from the upper 50s to the upper 60s.",
		"- **Afternoon:** Showers, with temperatures in the upper 70s. Chance of precipitation is 70%.",
		"- **3:00 PM** to **6:00 PM**: Expect showers. The peak precipitation chance is 70% at 3:00 PM.",
		"A few showers may linger into early evening.",
		"Clouds increase after sunrise.",
		"Rain chances peak during the afternoon.",
	} {
		if !strings.Contains(text, want) {
			t.Fatalf("rendered template missing %q:\n%s", want, text)
		}
	}
	assertOrderedText(t, text, []string{
		"# Today's Weather",
		"Today starts dry before showers return later in the day.",
		"## Alert Digest",
		"## Current Conditions",
		"## Daypart Forecast",
		"- **Morning:**",
		"- **Afternoon:**",
		"## Precipitation Timing",
		"## Forecast Discussion",
	})
	for _, unwanted := range []string{"## Planning Notes", "Morning weather looks routine.", "Watch late-day shower timing.", "- **Evening:**", "Forecast details are limited"} {
		if strings.Contains(text, unwanted) {
			t.Fatalf("rendered template included %q:\n%s", unwanted, text)
		}
	}
}

func TestRenderDaypartTemplatesUseRichHelperFields(t *testing.T) {
	tests := []struct {
		name     string
		template string
		context  any
		want     []string
	}{
		{
			name:     "daily",
			template: "daily",
			context: testDailyRenderContext{
				Report:        testDailyReportContext{Title: "Daily", ForecastDateLabel: "Monday, June 15, 2026"},
				GeneratedText: testDailyGeneratedText{Summary: "Daily summary."},
				Modules: testDailyModules{Dayparts: []testDailyDaypart{
					{Key: "morning", Summary: testDaypartSummary{
						DisplayName:              "Morning",
						DominantConditionDisplay: "Showers",
						TemperaturePhraseF:       "upper 60s",
					}},
				}},
			},
			want: []string{"- **Morning:** Showers, with temperatures in the upper 60s."},
		},
		{
			name:     "today",
			template: "today",
			context: testTodayRenderContext{
				Report:        testTodayReportContext{Title: "Today", ForecastDateLabel: "Monday, June 15, 2026"},
				GeneratedText: testTomorrowGeneratedText{Summary: "Today summary."},
				Modules: testTodayModules{Dayparts: []testTomorrowDaypart{
					{Key: "afternoon", Summary: testDaypartSummary{
						DisplayName:              "Afternoon",
						DominantConditionDisplay: "Storms",
						TemperaturePeakPhraseF:   "low 80s",
						TemperatureTrend:         "peaking",
						MaxPopPercent:            intPtr(70),
						MentionPrecipitation:     true,
					}},
				}},
			},
			want: []string{"- **Afternoon:** Storms, with temperatures peaking in the low 80s. Chance of precipitation is 70%."},
		},
		{
			name:     "tomorrow",
			template: "tomorrow",
			context: testTomorrowRenderContext{
				Report:        testTomorrowReportContext{Title: "Tomorrow", ForecastDateLabel: "Tuesday, June 16, 2026"},
				GeneratedText: testTomorrowGeneratedText{Summary: "Tomorrow summary."},
				Modules: testTomorrowModules{Dayparts: []testTomorrowDaypart{
					{Key: "morning", Summary: testDaypartSummary{
						DisplayName:              "Morning",
						DominantConditionDisplay: "Clear",
						TemperatureStartPhraseF:  "upper 50s",
						TemperatureEndPhraseF:    "upper 60s",
						TemperatureTrend:         "rising",
					}},
				}},
			},
			want: []string{"- **Morning:** Clear, with temperatures rising from the upper 50s to the upper 60s."},
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			rendered, err := Render(tt.template, tt.context)
			if err != nil {
				t.Fatalf("Render() error = %v", err)
			}
			text := string(rendered)
			for _, want := range tt.want {
				if !strings.Contains(text, want) {
					t.Fatalf("rendered template missing %q:\n%s", want, text)
				}
			}
			if strings.Contains(text, "## Alert Digest") {
				t.Fatalf("rendered template includes empty Alerts and Risk Products section:\n%s", text)
			}
			if strings.Contains(text, "\n\n\n") {
				t.Fatalf("rendered template includes excess blank lines:\n%s", text)
			}
		})
	}
}

func TestRenderTomorrowOmitsPrecipitationTimingWithoutWindows(t *testing.T) {
	rendered, err := Render("tomorrow", testTomorrowRenderContext{
		Report: testTomorrowReportContext{
			Title:             "Monday's Weather",
			ForecastDateLabel: "Monday, June 15, 2026",
			GeneratedAtLabel:  "Sunday, June 14, 2026 at 9:14 AM",
		},
		GeneratedText: testTomorrowGeneratedText{
			Summary:             "Dry weather is expected tomorrow.",
			ForecastDiscussion:  []string{"High pressure keeps rain chances low."},
			PrecipitationTiming: "Any stray shower chance is too low to highlight.",
		},
		Modules: testTomorrowModules{
			Dayparts: []testTomorrowDaypart{
				{
					Key: "morning",
					Summary: testDaypartSummary{
						DisplayName:              "Morning",
						TemperatureTrend:         "steady",
						TemperatureSteadyPhraseF: "low 60s",
						DominantConditionDisplay: "Clear",
						DominantConditionLower:   "clear",
					},
				},
			},
			PrecipTiming: &testPrecipTiming{},
		},
	})
	if err != nil {
		t.Fatalf("Render() error = %v", err)
	}
	text := string(rendered)
	for _, unwanted := range []string{"## Precipitation Timing", "Any stray shower chance is too low to highlight."} {
		if strings.Contains(text, unwanted) {
			t.Fatalf("dry render includes %q:\n%s", unwanted, text)
		}
	}
}

func TestRenderHourlyOmitsConditionalSectionsForClearWeather(t *testing.T) {
	rendered, err := Render("hourly", testRenderContext{
		Report: testReportContext{
			Title:            "Hourly Report",
			GeneratedAtLabel: "Saturday, June 14, 2026 at 9:14 AM",
		},
		GeneratedText: testGeneratedText{
			Summary:            "Dry weather is expected through the next several hours.",
			ForecastDiscussion: "Quiet conditions should persist through midday.",
		},
		Modules: testModules{
			CurrentConditions: &testCurrentConditions{
				ConditionTextLower: "cloudy",
				TemperatureF:       intPtr(72),
			},
			HourlyForecast: &testHourlyForecast{
				Periods: []testHourlyPeriod{
					{HourLabel: "9:00 AM", TextDescriptionLower: "mostly cloudy", TemperatureF: floatPtr(71), ProbabilityOfPrecipitationPercent: floatPtr(10)},
				},
			},
			AlertDigest: &testAlertDigest{},
			PrecipTiming: &testPrecipTiming{
				MaxPopPercent: intPtr(10),
			},
		},
	})
	if err != nil {
		t.Fatalf("Render() error = %v", err)
	}
	text := string(rendered)
	for _, unwanted := range []string{"## Alert Digest", "## Precipitation Timing", "Probability of precipitation is 10%", "wind"} {
		if strings.Contains(text, unwanted) {
			t.Fatalf("clear render includes %q:\n%s", unwanted, text)
		}
	}
	if strings.Contains(text, "\n\n\n") {
		t.Fatalf("clear render includes excess blank lines:\n%s", text)
	}
	for _, want := range []string{
		"Currently, it is 72°F and cloudy.\n\n## Hourly Forecast",
		"- **9:00 AM:** 71°F and mostly cloudy.\n\n## Forecast Discussion",
	} {
		if !strings.Contains(text, want) {
			t.Fatalf("clear render missing spacing %q:\n%s", want, text)
		}
	}
}

func TestRenderHourlyUsesSharedOpenEndedPrecipitationTiming(t *testing.T) {
	rendered, err := Render("hourly", testRenderContext{
		Report: testReportContext{
			Title:            "Hourly Report",
			GeneratedAtLabel: "Saturday, June 14, 2026 at 9:14 AM",
		},
		GeneratedText: testGeneratedText{
			Summary:             "Rain chances increase through midday.",
			ForecastDiscussion:  "Showers may continue beyond the report period.",
			PrecipitationTiming: "Plan for wet roads through the end of the period.",
		},
		Modules: testModules{
			CurrentConditions: &testCurrentConditions{},
			HourlyForecast:    &testHourlyForecast{},
			AlertDigest:       &testAlertDigest{},
			PrecipTiming: &testPrecipTiming{
				PrecipitationWindows: []testPrecipWindow{
					{
						PeriodBeginsHourLabel: "8:00 AM",
						MaxPopPercent:         intPtr(60),
						MaxPopHourLabel:       "10:00 AM",
						ExpectationPhrase:     "Showers likely.",
					},
				},
			},
		},
	})
	if err != nil {
		t.Fatalf("Render() error = %v", err)
	}
	text := string(rendered)
	for _, want := range []string{
		"## Precipitation Timing",
		"- **Starting at 8:00 AM**: Showers likely. The peak precipitation chance is 60% at 10:00 AM.",
		"Plan for wet roads through the end of the period.",
	} {
		if !strings.Contains(text, want) {
			t.Fatalf("rendered template missing %q:\n%s", want, text)
		}
	}
}

func TestUnknownAssetsReturnActionableErrors(t *testing.T) {
	if _, err := Template("missing"); err == nil || !strings.Contains(err.Error(), `unknown report template "missing"`) {
		t.Fatalf("Template() error = %v, want unknown template", err)
	}
	if _, err := Schema("missing"); err == nil || !strings.Contains(err.Error(), `unknown generated text schema "missing"`) {
		t.Fatalf("Schema() error = %v, want unknown schema", err)
	}
	if _, err := Render("missing", testRenderContext{}); err == nil || !strings.Contains(err.Error(), `unknown report template "missing"`) {
		t.Fatalf("Render() error = %v, want unknown template", err)
	}
}

func TestDailyPromptAssetExists(t *testing.T) {
	data, err := os.ReadFile("prompts/daily.generated_text.md")
	if err != nil {
		t.Fatalf("read Daily prompt asset: %v", err)
	}
	for _, want := range []string{"TASK:", "`summary`", "`forecast_discussion`", "`daily_planning`"} {
		if !strings.Contains(string(data), want) {
			t.Fatalf("Daily prompt asset missing %q:\n%s", want, string(data))
		}
	}
}

func TestRenderFailsForMissingContextFields(t *testing.T) {
	_, err := Render("hourly", map[string]any{"Report": map[string]any{"Title": "Hourly Report"}})
	if err == nil {
		t.Fatal("Render() error = nil, want missing field error")
	}
	if !strings.Contains(err.Error(), `render report template "hourly"`) {
		t.Fatalf("Render() error = %v, want render context", err)
	}
}

type testRenderContext struct {
	Report        testReportContext
	GeneratedText testGeneratedText
	Modules       testModules
}

type testTomorrowRenderContext struct {
	Report        testTomorrowReportContext
	GeneratedText testTomorrowGeneratedText
	Modules       testTomorrowModules
}

type testTodayRenderContext struct {
	Report        testTodayReportContext
	GeneratedText testTomorrowGeneratedText
	Modules       testTodayModules
}

type testDailyRenderContext struct {
	Report        testDailyReportContext
	GeneratedText testDailyGeneratedText
	Modules       testDailyModules
}

type testReportContext struct {
	Title            string
	LocationName     string
	ValidPeriodLabel string
	GeneratedAtLabel string
}

type testGeneratedText struct {
	Summary             string
	ForecastDiscussion  string
	PrecipitationTiming string
	Confidence          string
}

type testTomorrowReportContext struct {
	Title             string
	ForecastDateLabel string
	GeneratedAtLabel  string
}

type testTodayReportContext struct {
	Title             string
	ForecastDateLabel string
	GeneratedAtLabel  string
}

type testDailyReportContext struct {
	Title             string
	ForecastDateLabel string
	GeneratedAtLabel  string
}

type testTomorrowGeneratedText struct {
	Summary             string
	ForecastDiscussion  []string
	PrecipitationTiming string
	Confidence          string
}

type testDailyGeneratedText struct {
	Summary             string
	ForecastDiscussion  []string
	PrecipitationTiming string
	Confidence          string
}

type testModules struct {
	CurrentConditions       *testCurrentConditions
	HourlyForecast          *testHourlyForecast
	PrecipTiming            *testPrecipTiming
	AlertDigest             *testAlertDigest
	SPCConvectiveOutlooks   *testSPCOutlooks
	AreaForecastDiscussion  *testForecastDiscussion
	SPCConvectiveDiscussion *testSPCDiscussion
	WeatherStory            *testWeatherStory
}

type testTomorrowModules struct {
	Dayparts              []testTomorrowDaypart
	PrecipTiming          *testPrecipTiming
	AlertDigest           *testAlertDigest
	SPCConvectiveOutlooks *testSPCOutlooks
}

type testTodayModules struct {
	CurrentConditions     *testCurrentConditions
	Dayparts              []testTomorrowDaypart
	PrecipTiming          *testPrecipTiming
	AlertDigest           *testAlertDigest
	SPCConvectiveOutlooks *testSPCOutlooks
	TodayPlanning         *testTodayPlanning
}

type testDailyModules struct {
	Dayparts              []testDailyDaypart
	PrecipTiming          *testPrecipTiming
	AlertDigest           *testAlertDigest
	SPCConvectiveOutlooks *testSPCOutlooks
}

type testTodayPlanning struct {
	MorningReadiness             []string
	CommuteSchoolWorkdayConcerns []string
	OutdoorPlanning              []string
	LateDayChangeWatch           []string
}

type testTomorrowDaypart struct {
	Key     string
	Summary testDaypartSummary
}

type testDailyDaypart struct {
	Key     string
	Summary testDaypartSummary
}

type testDaypartSummary struct {
	DisplayName              string
	TempRangeF               string
	TemperaturePhraseF       string
	TemperatureTrend         string
	TemperatureStartPhraseF  string
	TemperatureEndPhraseF    string
	TemperaturePeakPhraseF   string
	TemperatureSteadyPhraseF string
	MaxPopPercent            *int
	MaxPopTime               string
	MaxPopTimeLabel          string
	MentionPrecipitation     bool
	DominantCondition        string
	DominantConditionLower   string
	DominantConditionDisplay string
}

type testCurrentConditions struct {
	ConditionText           string
	ConditionTextLower      string
	TemperatureF            *int
	ApparentTemperatureF    *int
	RelativeHumidityPercent *int
	WindSpeedMph            *int
	WindDirection           string
	WindDirectionText       string
}

type testHourlyForecast struct {
	Periods []testHourlyPeriod
}

type testHourlyPeriod struct {
	HourLabel                         string
	PeriodBegins                      string
	Name                              string
	TextDescription                   string
	TextDescriptionLower              string
	TemperatureF                      *float64
	WindSpeedMph                      *float64
	WindGustMph                       *float64
	WindDirection                     string
	ProbabilityOfPrecipitationPercent *float64
	MentionPrecipitation              bool
}

type testPrecipTiming struct {
	MaxPopPercent        *int
	MaxPopTime           string
	PrecipitationWindows []testPrecipWindow
	ThunderMentioned     bool
}

type testPrecipWindow struct {
	PeriodBegins          string
	PeriodBeginsHourLabel string
	PeriodEnds            string
	PeriodEndsHourLabel   string
	MaxPopPercent         *int
	MaxPopTime            string
	MaxPopHourLabel       string
	PrecipitationType     string
	ExpectationPhrase     string
}

type testAlertDigest struct {
	Missing  bool
	Relevant []testAlert
}

type testAlert struct {
	Event        string
	Headline     string
	Severity     string
	PeriodBegins string
	PeriodEnds   string
	Instruction  string
	Description  string
}

type testSPCOutlooks struct {
	Outlooks   []testSPCOutlook
	RiskDigest []testSPCRiskDigest
}

type testSPCOutlook struct {
	Label        string
	LabelText    string
	OutlookType  string
	PeriodBegins string
	PeriodEnds   string
}

type testSPCRiskDigest struct {
	LabelText    string
	RiskLabel    string
	PeriodBegins string
	PeriodEnds   string
}

type testForecastDiscussion struct {
	KeyMessages []string
	ShortTerm   string
}

type testSPCDiscussion struct {
	Discussions []testSPCDiscussionRecord
}

type testSPCDiscussionRecord struct {
	Headline   string
	Summary    string
	Discussion string
}

type testWeatherStory struct {
	Available   bool
	Title       string
	Description string
}

func floatPtr(value float64) *float64 {
	return &value
}

func intPtr(value int) *int {
	return &value
}

func assertOrderedText(t *testing.T, text string, ordered []string) {
	t.Helper()
	previousIndex := -1
	for _, want := range ordered {
		index := strings.Index(text, want)
		if index < 0 {
			t.Fatalf("text missing %q:\n%s", want, text)
		}
		if index <= previousIndex {
			t.Fatalf("%q appears out of order in:\n%s", want, text)
		}
		previousIndex = index
	}
}