//go:build integration

// Runs against a real Postgres with schema.sql loaded:
//
//	TICKETS_TEST_DB=postgres://... go test -tags integration ./internal/db/repos/ticketrepo
package ticketrepo

import (
	"context"
	"database/sql"
	"os"
	"sync"
	"testing"

	_ "github.com/jackc/pgx/v5/stdlib"
)

func testRepo(t *testing.T) (*Repo, int64) {
	t.Helper()
	dsn := os.Getenv("TICKETS_TEST_DB")
	if dsn == "" {
		t.Skip("TICKETS_TEST_DB not set")
	}
	db, err := sql.Open("pgx", dsn)
	if err != nil {
		t.Fatal(err)
	}
	t.Cleanup(func() { db.Close() })

	const guild = 424242
	for _, q := range []string{
		`DELETE FROM tickets WHERE guild_id = $1`,
		`DELETE FROM ticket_categories WHERE guild_id = $1`,
		`DELETE FROM ticket_settings WHERE guild_id = $1`,
		`DELETE FROM ticket_commands WHERE guild_id = $1`,
	} {
		if _, err := db.Exec(q, guild); err != nil {
			t.Fatal(err)
		}
	}
	return NewRepo(db), guild
}

func TestSettingsDefaultsAndChannels(t *testing.T) {
	r, g := testRepo(t)
	ctx := context.Background()

	s, err := r.GetSettings(ctx, g)
	if err != nil || s.Configured || s.Enabled || s.PanelTitle != DefaultPanelTitle || s.MaxOpenPerUser != 1 {
		t.Fatalf("defaults wrong: %+v %v", s, err)
	}
	if err := r.SetChannels(ctx, g, 111, 222); err != nil {
		t.Fatal(err)
	}
	if err := r.SetPanelMessage(ctx, g, 333); err != nil {
		t.Fatal(err)
	}
	s, _ = r.GetSettings(ctx, g)
	if !s.Configured || s.ChannelID != 111 || s.LogChannelID != 222 || s.PanelMessageID != 333 {
		t.Fatalf("saved settings wrong: %+v", s)
	}
	// Clearing the log channel.
	_ = r.SetChannels(ctx, g, 111, 0)
	s, _ = r.GetSettings(ctx, g)
	if s.LogChannelID != 0 {
		t.Errorf("log channel not cleared: %+v", s)
	}
}

func TestNextNumberIsUniqueUnderConcurrency(t *testing.T) {
	r, g := testRepo(t)
	ctx := context.Background()

	var mu sync.Mutex
	seen := map[int]bool{}
	var wg sync.WaitGroup
	for i := 0; i < 20; i++ {
		wg.Add(1)
		go func() {
			defer wg.Done()
			n, err := r.NextNumber(ctx, g)
			if err != nil {
				t.Error(err)
				return
			}
			mu.Lock()
			defer mu.Unlock()
			if seen[n] {
				t.Errorf("number %d handed out twice", n)
			}
			seen[n] = true
		}()
	}
	wg.Wait()
	for n := 1; n <= 20; n++ {
		if !seen[n] {
			t.Errorf("number %d missing: numbers should be 1..20", n)
		}
	}
}

func TestCategories(t *testing.T) {
	r, g := testRepo(t)
	ctx := context.Background()

	a, err := r.AddCategory(ctx, Category{GuildID: g, Name: "Support", Emoji: "🛟", StaffRoleID: 9})
	if err != nil {
		t.Fatal(err)
	}
	b, _ := r.AddCategory(ctx, Category{GuildID: g, Name: "Appeal", Description: "Ban appeals"})
	if a.Position != 0 || b.Position != 1 || b.Emoji != "" || b.StaffRoleID != 0 {
		t.Fatalf("positions or defaults wrong: %+v %+v", a, b)
	}
	list, _ := r.ListCategories(ctx, g)
	if len(list) != 2 || list[0].Name != "Support" || list[1].Description != "Ban appeals" {
		t.Fatalf("list wrong: %+v", list)
	}
	if c, _ := r.GetCategory(ctx, g, a.ID); c == nil || c.Emoji != "🛟" {
		t.Errorf("get wrong: %+v", c)
	}
	if c, _ := r.GetCategory(ctx, g+1, a.ID); c != nil {
		t.Error("a category must not be readable from another guild")
	}
	if ok, _ := r.DeleteCategoryByName(ctx, g, "support"); !ok {
		t.Error("delete should match case-insensitively")
	}
	if ok, _ := r.DeleteCategoryByName(ctx, g, "nope"); ok {
		t.Error("deleting a missing category should report false")
	}
}

func TestTicketLifecycle(t *testing.T) {
	r, g := testRepo(t)
	ctx := context.Background()

	cat, _ := r.AddCategory(ctx, Category{GuildID: g, Name: "Support"})
	id, err := r.CreateTicket(ctx, Ticket{GuildID: g, Number: 1, CategoryID: cat.ID, CategoryName: "Support", ThreadID: 5001, IntroMessage: 6001, OpenerID: 77, Subject: "Help"})
	if err != nil || id == 0 {
		t.Fatal(err)
	}
	if n, _ := r.CountOpenByOpener(ctx, g, 77); n != 1 {
		t.Errorf("open count = %d", n)
	}

	if holder, _ := r.Claim(ctx, 5001, 10); holder != 10 {
		t.Errorf("first claim should win, holder = %d", holder)
	}
	if holder, _ := r.Claim(ctx, 5001, 11); holder != 10 {
		t.Errorf("second claim must not take over, holder = %d", holder)
	}

	if ok, _ := r.Close(ctx, 5001, 10, "solved"); !ok {
		t.Error("first close should succeed")
	}
	if ok, _ := r.Close(ctx, 5001, 11, ""); ok {
		t.Error("closing twice must report false")
	}
	tk, _ := r.GetTicketByThread(ctx, 5001)
	if tk == nil || tk.Status != StatusClosed || tk.ClosedBy != 10 || tk.CloseReason != "solved" || tk.ClosedAt.IsZero() || tk.ClaimedBy != 10 || tk.IntroMessage != 6001 {
		t.Fatalf("closed ticket wrong: %+v", tk)
	}
	if n, _ := r.CountOpenByOpener(ctx, g, 77); n != 0 {
		t.Errorf("closed ticket still counted as open")
	}
	if holder, _ := r.Claim(ctx, 5001, 12); holder != 0 {
		t.Error("a closed ticket cannot be claimed")
	}

	// Deleting the category keeps the ticket and its copied name.
	_, _ = r.DeleteCategoryByName(ctx, g, "Support")
	tk, _ = r.GetTicketByThread(ctx, 5001)
	if tk.CategoryID != 0 || tk.CategoryName != "Support" {
		t.Errorf("ticket after category delete: %+v", tk)
	}
	if tk, _ := r.GetTicketByThread(ctx, 999); tk != nil {
		t.Error("unknown thread should return nil")
	}
}

func TestCommands(t *testing.T) {
	r, g := testRepo(t)
	ctx := context.Background()
	if _, err := r.db.Exec(`INSERT INTO ticket_commands (guild_id, command_type, requested_by) VALUES ($1, 'post_panel', 5)`, g); err != nil {
		t.Fatal(err)
	}
	cmds, err := r.ListUnprocessedCommands(ctx)
	if err != nil {
		t.Fatal(err)
	}
	var mine *Command
	for i := range cmds {
		if cmds[i].GuildID == g {
			mine = &cmds[i]
		}
	}
	if mine == nil || mine.CommandType != "post_panel" || mine.RequestedBy != 5 {
		t.Fatalf("command not listed: %+v", cmds)
	}
	_ = r.MarkCommandProcessed(ctx, mine.ID)
	cmds, _ = r.ListUnprocessedCommands(ctx)
	for _, c := range cmds {
		if c.ID == mine.ID {
			t.Error("processed command still listed")
		}
	}
}

func TestUpdateSettingsCategoriesAndList(t *testing.T) {
	r, g := testRepo(t)
	ctx := context.Background()
	str := func(v string) *string { return &v }
	num := func(v int) *int { return &v }
	on := true

	// Changing the text of a server that never set tickets up creates its row
	// and leaves the system off.
	if err := r.UpdateSettings(ctx, g, SettingsPatch{PanelTitle: str("Help desk"), MaxOpenPerUser: num(3)}); err != nil {
		t.Fatal(err)
	}
	st, _ := r.GetSettings(ctx, g)
	if st.Enabled || st.PanelTitle != "Help desk" || st.MaxOpenPerUser != 3 || st.PanelDescription != DefaultPanelDescription {
		t.Errorf("settings: %+v", st)
	}
	if err := r.UpdateSettings(ctx, g, SettingsPatch{Enabled: &on}); err != nil {
		t.Fatal(err)
	}
	if st, _ = r.GetSettings(ctx, g); !st.Enabled || st.PanelTitle != "Help desk" {
		t.Errorf("enabling keeps the rest: %+v", st)
	}
	if err := r.UpdateSettings(ctx, g, SettingsPatch{MaxOpenPerUser: num(11)}); err == nil {
		t.Error("the database refuses more than 10 open tickets per member")
	}
	if err := r.UpdateSettings(ctx, g, SettingsPatch{}); err != nil {
		t.Errorf("an empty patch is fine: %v", err)
	}

	cat, err := r.AddCategory(ctx, Category{GuildID: g, Name: "Support", Emoji: "🎫", Description: "Questions", StaffRoleID: 99})
	if err != nil {
		t.Fatal(err)
	}
	other, err := r.AddCategory(ctx, Category{GuildID: g, Name: "Report"})
	if err != nil {
		t.Fatal(err)
	}
	zero := int64(0)
	empty := ""
	got, err := r.UpdateCategory(ctx, g, cat.ID, CategoryPatch{Name: str("Help"), Emoji: &empty, StaffRoleID: &zero})
	if err != nil || got == nil {
		t.Fatalf("update: %v %v", got, err)
	}
	if got.Name != "Help" || got.Emoji != "" || got.StaffRoleID != 0 || got.Description != "Questions" {
		t.Errorf("only the named fields change, and empty clears: %+v", got)
	}
	if got, _ = r.UpdateCategory(ctx, g, cat.ID, CategoryPatch{StaffRoleID: func() *int64 { v := int64(5); return &v }()}); got.StaffRoleID != 5 {
		t.Errorf("setting the role: %+v", got)
	}
	if gone, err := r.UpdateCategory(ctx, g+1, cat.ID, CategoryPatch{Name: str("x")}); err != nil || gone != nil {
		t.Errorf("another server's category can't be edited: %v %v", gone, err)
	}
	if _, err := r.UpdateCategory(ctx, g, other.ID, CategoryPatch{Name: str("")}); err == nil {
		t.Error("the database refuses an empty name")
	}

	for n, status := range []string{"open", "open", "closed"} {
		id, err := r.CreateTicket(ctx, Ticket{GuildID: g, Number: n + 1, CategoryID: cat.ID, CategoryName: "Help", ThreadID: int64(9100 + n), OpenerID: 7, Subject: "x"})
		if err != nil {
			t.Fatal(err)
		}
		if status == "closed" {
			if _, err := r.Close(ctx, int64(9100+n), 7, "done"); err != nil {
				t.Fatal(err)
			}
		}
		_ = id
	}
	open, err := r.ListTickets(ctx, g, StatusOpen, 10)
	if err != nil || len(open) != 2 || open[0].Number != 2 {
		t.Errorf("open tickets, newest first: %v %v", open, err)
	}
	closed, _ := r.ListTickets(ctx, g, StatusClosed, 10)
	if len(closed) != 1 {
		t.Errorf("closed tickets: %v", closed)
	}
	if other, _ := r.ListTickets(ctx, g+1, StatusOpen, 10); len(other) != 0 {
		t.Error("another server's tickets must not show")
	}
}