package main

import (
	"context"
	"encoding/json"
	"fmt"
	"testing"
	"time"
)

func newTestGames(t *testing.T) Games {
	db := newTestDB(t)

	games, err := NewGames(context.Background(), db)
	if err != nil {
		t.Fatal(err)
	}
	return games
}

func TestGames(t *testing.T) {
	ctx := context.Background()

	t.Run("empty", func(t *testing.T) {
		games := newTestGames(t)

		if v, err := games.GamesForUser(ctx, ""); err != nil {
			t.Error("err getting games for empty user:", err)
		} else if len(v) > 0 {
			t.Error(v)
		}

		if v, err := games.GameByName(ctx, "", ""); err != nil {
			t.Error("err getting game by empty name for empty user:", err)
		} else if len(v) > 0 {
			t.Error(v)
		}

		if v, err := games.GameState(ctx, ""); err != nil {
			t.Error("err getting game state for empty:", err)
		} else if len(v.Players) > 0 || !v.Completed.IsZero() {
			t.Error(v)
		}
	})

	t.Run("mvp", func(t *testing.T) {
		games := newTestGames(t)

		id, err := games.CreateGame(ctx, "g1")
		if err != nil {
			t.Fatal("err creating game:", err)
		} else if id2, err := games.CreateGame(ctx, "g1"); err != nil {
			t.Fatal("err creating game redundantly:", err)
		} else if id != id2 {
			t.Fatal("redundant create game didnt return same id:", id2)
		}

		if err := games.CreateEventPlayerJoin(ctx, id, "p0", "player zero"); err != nil {
			t.Fatal("err creating event player join:", err)
		} else if err := games.CreateEventPlayerLeave(ctx, id, "p0"); err != nil {
			t.Fatal("err creating event player leave:", err)
		}

		for i := 0; i < 4; i++ {
			p := fmt.Sprintf("p%d", i+1)
			if err := games.CreateEventPlayerJoin(ctx, id, p, "player "+p); err != nil {
				t.Fatal(p, "err creating event player join", err)
			}
			if name, err := games.UserName(ctx, p); err != nil {
				t.Fatal(p, "err getting user name", err)
			} else if name != "player "+p {
				t.Fatal("name wrong", name)
			}
			if err := games.UpdateUserName(ctx, p, "player! "+p); err != nil {
				t.Fatal(p, "failed to rename:", err)
			} else if name, err := games.UserName(ctx, p); err != nil {
				t.Fatal(p, "err getting user name", err)
			} else if name != "player! "+p {
				t.Fatal("updated name wrong", name)
			}
		}

		if events, err := games.GameEvents(ctx, id, time.Time{}); err != nil {
			t.Fatal("failed to get player join, leave events:", err)
		} else if len(events) != 6 {
			t.Error("wrong number of events:", len(events))
		}

		now := time.Now()
		if err := games.CreateEventAssignmentRotation(ctx, id, "", "", "", 1); err != nil {
			t.Fatal("err creating rotation:", err)
		}

		if events, err := games.GameEvents(ctx, id, time.Time{}); err != nil {
			t.Fatal("failed to get player join, leave events:", err)
		} else if len(events) != 7 {
			t.Error("wrong number of events:", len(events))
		} else if events, err = games.GameEvents(ctx, id, now); err != nil {
			t.Fatal("failed to get assignment rotation event:", err)
		} else if len(events) != 1 {
			t.Error("wrong number of events:", len(events))
		} else if _, ok := events[0].(EventAssignmentRotation); !ok {
			t.Errorf("not an assignment rotation event: %T", events[0])
		}

		if v, err := games.GamesForUser(ctx, "p1"); err != nil {
			t.Error("err getting games for user:", err)
		} else if len(v) < 1 {
			t.Error("no games found for user:", v)
		} else if v[0] != id {
			t.Error("wrong game found for user:", v)
		}

		if v, err := games.GameByName(ctx, "p1", "g1"); err != nil {
			t.Error("err getting game by name for user:", err)
		} else if v != id {
			t.Error("wrong game by name for user:", v)
		}

		if v, err := games.GameState(ctx, id); err != nil {
			t.Error("err getting game state:", err)
		} else if len(v.Players) != 4 || !v.Completed.IsZero() {
			t.Error("wrong game state:", v)
		} else {
			for i := 0; i < 4; i++ {
				p := fmt.Sprintf("p%d", i+1)
				if v.Players[p].Points() != 0 {
					t.Error("nonzero points after zero kills:", v.Players[p].Points())
				}
				if v.Players[p].KillWords.Global.Word == "" {
					t.Error(p, "no killwords.global")
				} else if v.Players[p].KillWords.Assigned.IsZero() {
					t.Error(p, "no killwords.assigned")
				} else if v.Players[p].KillWords.Assignee == "" {
					t.Error(p, "no killwords.assignee")
				} else if len(v.Players[p].KillWords.Assignment.Public) == 0 {
					t.Error(p, "no killwords.assigment.public")
				} else if len(v.Players[p].KillWords.Assignment.Private) == 0 {
					t.Error(p, "no killwords.assigment.private")
				}
			}
		}

		if err := games.CreateEventGameComplete(ctx, id); err != nil {
			t.Fatal("err creating game complete:", err)
		} else if state, err := games.GameState(ctx, id); err != nil {
			t.Fatal("err fetching state after completing:", err)
		} else if state.Completed.IsZero() {
			t.Fatal("state.Completed is zero")
		}
	})
}

func TestParseEvent(t *testing.T) {
	now := time.Now()

	cases := map[string]Event{
		"player join": EventPlayerJoin{
			Type: PlayerJoin,
			ID:   "x",
		},
		"player leave": EventPlayerLeave{
			Type: PlayerLeave,
			ID:   "x",
		},
		"game complete": EventGameComplete{
			Type: GameComplete,
		},
		"assignment rotation": EventAssignmentRotation{
			Type:   AssignmentRotation,
			Killer: "x",
			Victim: "y",
			KillWord: KillWord{
				Word:   "word",
				Points: 1,
			},
			AllKillWords: map[string]KillWords{
				"x": KillWords{
					Global: KillWord{
						Word:   "a",
						Points: -1,
					},
					Assignee: "z",
					Assigned: now,
					Assignment: Assignment{
						Public: []KillWord{{
							Word:   "word2",
							Points: 2,
						}},
						Private: []KillWord{{
							Word:   "word3",
							Points: 3,
						}},
					},
				},
			},
		},
	}

	for name, d := range cases {
		c := d
		t.Run(name, func(t *testing.T) {
			c := EventWithTime(c, now)
			b, _ := json.Marshal(c)
			got, err := parseEvent(b, now)
			if err != nil {
				t.Fatal(err)
			}
			gotb, _ := json.Marshal(got)
			if string(b) != string(gotb) {
				t.Errorf("expected (%T) %+v, but got (%T) %+v", c, c, got, got)
			}
		})
	}
}