package web

import (
	"database/sql"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"os"
	"path/filepath"
	"regexp"
	"testing"

	"github.com/martinlehoux/biking_home/internal/ridetest"
	"github.com/martinlehoux/biking_home/official_climb"
	"github.com/martinlehoux/biking_home/ride"
	"github.com/martinlehoux/biking_home/rideanalysis"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func recordFixtureAttempts(t *testing.T, server *Server, rideID int64, climb official_climb.OfficialClimb) {
	t.Helper()
	parsed, _ := testRideForClimb(t)
	analysis := rideanalysis.Analyze(parsed, nil, []official_climb.OfficialClimb{climb}, official_climb.DefaultMatchPolicy())
	server.recordOfficialClimbAttempts(rideID, parsed, analysis)
}
func storeRideFixtureFile(t *testing.T, db *sql.DB, rideID int64) {
	t.Helper()
	parsed, _ := testRideForClimb(t)
	fitPath := filepath.Join(t.TempDir(), "ride.fit")
	fitFile, err := os.Create(fitPath)
	require.NoError(t, err)
	require.NoError(t, ride.EncodeFIT(parsed, fitFile))
	require.NoError(t, fitFile.Close())
	_, err = db.Exec("UPDATE rides SET fit_path = ? WHERE id = ?", fitPath, rideID)
	require.NoError(t, err)
}

// climbProfileData reads the profile JSON the climb page embeds.
func climbProfileData(t *testing.T, body string) ClimbProfileData {
	t.Helper()
	match := regexp.MustCompile(`(?s)id="climb-profile-data"[^>]*>(.*?)</script>`).FindStringSubmatch(body)
	require.Len(t, match, 2, "climb page must embed its profile JSON")
	var profile ClimbProfileData
	require.NoError(t, json.Unmarshal([]byte(match[1]), &profile))
	return profile
}

func TestHandleClimbRendersAttemptsAndProfile(t *testing.T) {
	server, db := newWebTestServer(t)
	_, climbFixture := testRideForClimb(t)
	created, err := official_climb.Create(db, climbFixture)
	require.NoError(t, err)
	rideID := insertTestRide(t, db)
	storeRideFixtureFile(t, db, rideID)
	recordFixtureAttempts(t, server, rideID, created)

	recorder := httptest.NewRecorder()
	server.Handler().ServeHTTP(recorder, httptest.NewRequest(http.MethodGet, climbDetailURL(created.ID), nil))
	require.Equal(t, http.StatusOK, recorder.Code)
	body := recorder.Body.String()
	assert.Contains(t, body, "Col de Test")
	assert.Contains(t, body, "climb-profile-data")
	profile := climbProfileData(t, body)
	require.NotEmpty(t, profile.Sections)
	assert.InDelta(t, 0, profile.Sections[0].StartKm, 0.01)
	assert.InDelta(t, 300, profile.Sections[0].StartElevationM, 1)
	lastSection := profile.Sections[len(profile.Sections)-1]
	assert.InDelta(t, 1, lastSection.EndKm, 0.01)
	assert.InDelta(t, 447, lastSection.EndElevationM, 2)
	assert.Contains(t, body, "Test Ride")
	// A ride without a power meter renders a dash, not a fabricated value.
	assert.Contains(t, body, `<td class="numeric">-</td>`)
}

func TestHandleClimbRendersAttemptPoints(t *testing.T) {
	server, db := newWebTestServer(t)
	parsed := ridetest.MustRide("1km at 14.7% w=250 | 1km at -6.7% w=150", ridetest.StartCoord(43.61, 5.42), ridetest.StartElevation(300), ridetest.Sampling(1000), ridetest.StartTime(testRideStart))
	created, err := official_climb.Create(db, official_climb.OfficialClimb{Name: "Col de Test", StartCoord: parsed.Coords[0], EndCoord: parsed.Coords[1], Sample: parsed.Sample(0, 1)})
	require.NoError(t, err)
	rideID := insertTestRide(t, db)
	analysis := rideanalysis.Analyze(parsed, nil, []official_climb.OfficialClimb{created}, official_climb.DefaultMatchPolicy())
	server.recordOfficialClimbAttempts(rideID, parsed, analysis)

	recorder := httptest.NewRecorder()
	server.Handler().ServeHTTP(recorder, httptest.NewRequest(http.MethodGet, climbDetailURL(created.ID), nil))
	require.Equal(t, http.StatusOK, recorder.Code)
	body := recorder.Body.String()
	assert.Contains(t, body, `id="climb-attempt-points"`)
	// Mean of the climb interval power samples: 250, 250 W.
	assert.Contains(t, body, `"averagePowerW":250`)
	assert.Contains(t, body, `"url":"/rides/`)
	assert.Contains(t, body, "Avg power")
	assert.Contains(t, body, "250 W")
}

func TestClimbAttemptPointsSkipAttemptsWithoutPower(t *testing.T) {
	power := 235.5
	views := []ClimbAttemptView{
		{RideID: 7, RideName: "Powered", Date: "01 Sep 2026, 10:00", DurationS: 1110, AveragePowerW: &power},
		{RideID: 8, RideName: "No meter", Date: "02 Sep 2026, 10:00", DurationS: 1200},
	}

	points := climbAttemptPoints(views)

	require.Len(t, points, 1)
	assert.Equal(t, ClimbAttemptPoint{DurationS: 1110, AveragePowerW: 235.5, Date: "01 Sep 2026, 10:00", RideName: "Powered", URL: "/rides/7"}, points[0])
}

func TestHandleClimbNotFound(t *testing.T) {
	server, _ := newWebTestServer(t)
	recorder := httptest.NewRecorder()
	server.Handler().ServeHTTP(recorder, httptest.NewRequest(http.MethodGet, "/climbs/999", nil))
	assert.Equal(t, http.StatusNotFound, recorder.Code)
}