package web_test

import (
	"context"
	"net/url"
	"strings"
	"testing"
	"time"
)

// TestViewsLandingOnboarding asserts that GET /views with no views and no
// MRU renders the onboarding shell ("No saved views yet" + "+ New view").
func TestViewsLandingOnboarding(t *testing.T) {
	srv, pool := mustServer(t)
	defer pool.Close()
	h := srv.Routes()
	// Clear any leftover touched views from prior runs so the MRU 302
	// doesn't fire and steal the response.
	if _, err := pool.Exec(context.Background(),
		`UPDATE projax.views SET last_used_at = NULL`); err != nil {
		t.Fatalf("reset mru: %v", err)
	}
	// Also clear ALL views so the onboarding shell renders (othewise the
	// landing still ListViews-displays them).
	if _, err := pool.Exec(context.Background(), `DELETE FROM projax.views`); err != nil {
		t.Fatalf("clear views: %v", err)
	}
	code, body := get(t, h, "/views")
	if code != 200 {
		t.Fatalf("GET /views status=%d body=%q", code, body)
	}
	if !strings.Contains(body, "No saved views yet") {
		t.Error("onboarding shell should surface the no-views nudge")
	}
	if !strings.Contains(body, `href="/views/new"`) {
		t.Error("onboarding shell should link to /views/new")
	}
}

// TestViewsLandingMRURedirects asserts that GET /views 302s to the most
// recently used view when one exists.
func TestViewsLandingMRURedirects(t *testing.T) {
	srv, pool := mustServer(t)
	defer pool.Close()
	h := srv.Routes()
	stamp := strings.ReplaceAll(time.Now().UTC().Format("150405.000"), ".", "")
	slug := "p5j-b-landing-" + stamp
	defer pool.Exec(context.Background(), `DELETE FROM projax.views WHERE slug = $1`, slug)
	// Seed + touch.
	if _, err := pool.Exec(context.Background(), `
INSERT INTO projax.views (slug, name, filter_json, last_used_at)
VALUES ($1, 'P5j B Landing', '{"view_type":"list"}'::jsonb, now())`, slug); err != nil {
		t.Fatalf("seed view: %v", err)
	}
	code, body := get(t, h, "/views")
	if code != 302 {
		t.Errorf("GET /views status=%d (want 302 to MRU); body=%q", code, body)
	}
}

// TestViewRenderShowsSavedView asserts that GET /views/{slug} renders the
// view's name + slug in the header and the tree-section body.
func TestViewRenderShowsSavedView(t *testing.T) {
	srv, pool := mustServer(t)
	defer pool.Close()
	h := srv.Routes()
	stamp := strings.ReplaceAll(time.Now().UTC().Format("150405.000"), ".", "")
	slug := "p5j-b-render-" + stamp
	defer pool.Exec(context.Background(), `DELETE FROM projax.views WHERE slug = $1`, slug)
	if _, err := pool.Exec(context.Background(), `
INSERT INTO projax.views (slug, name, filter_json)
VALUES ($1, 'P5j B Render', '{"view_type":"card"}'::jsonb)`, slug); err != nil {
		t.Fatalf("seed: %v", err)
	}
	code, body := get(t, h, "/views/"+slug)
	if code != 200 {
		t.Fatalf("GET /views/<slug> status=%d body=%q", code, body)
	}
	if !strings.Contains(body, "P5j B Render") {
		t.Error("render should surface the view's name")
	}
	if !strings.Contains(body, `/views/`+slug) {
		t.Error("render should surface the view's slug in the header")
	}
	if !strings.Contains(body, `class="tree-card-grid"`) {
		t.Error("view_type=card should render the card grid")
	}
}

// TestViewRender404OnUnknownSlug — an unknown slug returns 404, not a
// silent fallback to the tree.
func TestViewRender404OnUnknownSlug(t *testing.T) {
	srv, pool := mustServer(t)
	defer pool.Close()
	h := srv.Routes()
	code, _ := get(t, h, "/views/this-slug-does-not-exist-anywhere-9876")
	if code != 404 {
		t.Errorf("unknown slug should 404, got %d", code)
	}
}

// TestViewCreateAndDelete — POST /views creates; POST /views/<slug>/delete
// removes. Verifies the slug-format error path too.
func TestViewCreateAndDelete(t *testing.T) {
	srv, pool := mustServer(t)
	defer pool.Close()
	h := srv.Routes()
	stamp := strings.ReplaceAll(time.Now().UTC().Format("150405.000"), ".", "")
	slug := "p5j-b-crud-" + stamp
	defer pool.Exec(context.Background(), `DELETE FROM projax.views WHERE slug = $1`, slug)

	form := url.Values{}
	form.Set("slug", slug)
	form.Set("name", "P5j B CRUD")
	form.Set("view_type", "list")
	form.Set("filter_query", "tag=work")
	code, _ := post(t, h, "/views", form)
	if code != 303 {
		t.Fatalf("create status=%d want 303", code)
	}

	// Reserved-slug 400.
	form2 := url.Values{}
	form2.Set("slug", "dashboard")
	form2.Set("name", "Should be rejected")
	form2.Set("view_type", "list")
	code, body := post(t, h, "/views", form2)
	if code != 400 {
		t.Errorf("reserved-slug create should 400, got %d body=%q", code, body)
	}

	// Delete.
	code, _ = post(t, h, "/views/"+slug+"/delete", url.Values{})
	if code != 303 {
		t.Errorf("delete status=%d want 303", code)
	}
}

// TestSavedViewFilterOverlay — chip params on /views/<slug>?tag=x narrow
// the saved filter. Verifies the slice B render-path overlay.
func TestSavedViewFilterOverlay(t *testing.T) {
	srv, pool := mustServer(t)
	defer pool.Close()
	h := srv.Routes()
	ctx := context.Background()
	stamp := strings.ReplaceAll(time.Now().UTC().Format("150405.000"), ".", "")
	slug := "p5j-b-overlay-" + stamp
	devSlug := "p5j-b-overlay-d-" + stamp
	homeSlug := "p5j-b-overlay-h-" + stamp
	defer pool.Exec(context.Background(), `DELETE FROM projax.views WHERE slug = $1`, slug)

	var dev, home string
	if err := pool.QueryRow(ctx, `select id from projax.items where slug='dev' and cardinality(parent_ids)=0`).Scan(&dev); err != nil {
		t.Fatalf("dev: %v", err)
	}
	if err := pool.QueryRow(ctx, `select id from projax.items where slug='home' and cardinality(parent_ids)=0`).Scan(&home); err != nil {
		t.Fatalf("home: %v", err)
	}
	var devID, homeID string
	if err := pool.QueryRow(ctx, `
INSERT INTO projax.items (kind, title, slug, parent_ids, tags)
VALUES (array['project']::text[], 'P5jB Dev', $1, ARRAY[$2]::uuid[], ARRAY['work'])
RETURNING id`, devSlug, dev).Scan(&devID); err != nil {
		t.Fatalf("seed dev item: %v", err)
	}
	if err := pool.QueryRow(ctx, `
INSERT INTO projax.items (kind, title, slug, parent_ids, tags)
VALUES (array['project']::text[], 'P5jB Home', $1, ARRAY[$2]::uuid[], ARRAY['home'])
RETURNING id`, homeSlug, home).Scan(&homeID); err != nil {
		t.Fatalf("seed home item: %v", err)
	}
	defer pool.Exec(context.Background(), `DELETE FROM projax.items WHERE id IN ($1,$2)`, devID, homeID)

	if _, err := pool.Exec(ctx, `
INSERT INTO projax.views (slug, name, filter_json)
VALUES ($1, 'P5jB Overlay', '{"view_type":"list"}'::jsonb)`, slug); err != nil {
		t.Fatalf("seed view: %v", err)
	}

	devLink := `href="/i/dev.` + devSlug + `"`
	homeLink := `href="/i/home.` + homeSlug + `"`

	_, base := get(t, h, "/views/"+slug)
	if !strings.Contains(base, devLink) {
		t.Error("saved view without tag should show dev row")
	}
	if !strings.Contains(base, homeLink) {
		t.Error("saved view without tag should show home row")
	}
	_, narrowed := get(t, h, "/views/"+slug+"?tag=work")
	if !strings.Contains(narrowed, devLink) {
		t.Error("URL chip tag=work should keep dev (work-tagged)")
	}
	if strings.Contains(narrowed, homeLink) {
		t.Error("URL chip tag=work should hide home")
	}
}