package wechat

import (
	"database/sql/driver"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"os"
	"past/internal/store"
	"past/internal/testdb"
	"path/filepath"
	"strings"
	"testing"
)

type subscribeTransport func(*http.Request) (*http.Response, error)

func (f subscribeTransport) RoundTrip(r *http.Request) (*http.Response, error) { return f(r) }

func TestSubscribeRecordsEveryOutcome(t *testing.T) {
	for _, tt := range []struct {
		name, openid, template, response, reason string
		subscribed, success                      bool
		code                                     any
		requests                                 int
	}{
		{name: "success", openid: "recipient-openid", template: "template-id", subscribed: true, response: `{"errcode":0}`, success: true, code: int64(0), requests: 1},
		{name: "quota exhausted", openid: "recipient-openid", template: "template-id", subscribed: true, response: `{"errcode":43101,"errmsg":"user refuse"}`, reason: "43101", code: int64(43101), requests: 1},
		{name: "malformed response", openid: "recipient-openid", template: "template-id", subscribed: true, response: `not-json`, reason: "无效", requests: 1},
		{name: "invalid errcode", openid: "recipient-openid", template: "template-id", subscribed: true, response: `{"errcode":"invalid"}`, reason: "无效", requests: 1},
		{name: "missing errcode", openid: "recipient-openid", template: "template-id", subscribed: true, response: `{}`, reason: "errcode", requests: 1},
		{name: "no authorization", openid: "recipient-openid", template: "template-id", reason: "未订阅"},
		{name: "no openid", template: "template-id", reason: "openid"},
		{name: "no template", openid: "recipient-openid", reason: "模板未配置"},
	} {
		t.Run(tt.name, func(t *testing.T) {
			steps := []testdb.Step{{Match: "SELECT status FROM notify_log", Columns: []string{"status"}}, {Match: "SELECT openid FROM users", Args: []any{int64(2)}, Columns: []string{"openid"}, Rows: [][]driver.Value{{tt.openid}}}}
			if tt.openid != "" && tt.template != "" {
				auth := [][]driver.Value(nil)
				if tt.subscribed {
					auth = [][]driver.Value{{int64(1)}}
				}
				steps = append(steps, testdb.Step{Match: "FROM subscribe_templates", Args: []any{int64(2), "notify"}, Columns: []string{"id"}, Rows: auth})
			}
			meta := []testdb.Step{{Match: "SELECT couple_id FROM users", Columns: []string{"couple_id"}, Rows: [][]driver.Value{{int64(5)}}}, {Match: "SELECT action_type FROM activity_log", Columns: []string{"action_type"}, Rows: [][]driver.Value{{"diary_create"}}}}
			steps = append(steps, meta...)
			steps = append(steps, testdb.Step{Match: "INSERT INTO subscribe_message_logs", Check: func(q string, args []any) error {
				v := testdb.InsertArgs(q, args)
				args = []any{v["activity_id"], v["couple_id"], v["user_id"], v["to_user_id"], v["to_openid"], v["action_type"], v["message_title"], v["message_content"], v["template_type"], v["template_id"], v["page"], v["status"], v["error_code"], v["http_status"], v["error_msg"], v["attempts"], v["duration_ms"], v["sent_at"]}
				if args[4] != tt.openid || args[5] != "diary_create" || args[6] != "new diary" {
					t.Errorf("wrong recipient/event: %v", args)
					return nil
				}
				if args[7] != strings.Repeat("爱", 20) {
					t.Errorf("log must record normalized content: %v", args[7])
				}
				status := "failed"
				if tt.success {
					status = "success"
				}
				if args[11] != status || args[12] != tt.code || args[15] != int64(tt.requests) {
					t.Errorf("wrong result: %v", args)
					return nil
				}
				if !strings.Contains(fmt.Sprint(args[14]), tt.reason) {
					t.Errorf("missing failure reason: %v", args[14])
					return nil
				}
				if tt.success && args[17] == nil {
					t.Error("missing sent_at")
					return nil
				}
				if !tt.success && args[17] != nil {
					t.Error("failed message has sent_at")
					return nil
				}
				return nil
			}})
			steps = append(steps, meta...)
			steps = append(steps, testdb.Step{Match: "SELECT COUNT(*) as cnt FROM notify_log", Columns: []string{"cnt"}, Rows: [][]driver.Value{{int64(0)}}}, testdb.Step{Match: "INSERT INTO notify_log"})
			db, _ := testdb.Open(t, steps)
			client := New("app", "secret", tt.template, t.TempDir(), store.WrapSQL(db))
			os.MkdirAll(filepath.Dir(client.cacheFile()), 0755)
			os.WriteFile(client.cacheFile(), []byte("cached-token"), 0600)
			calls := 0
			client.http.Transport = subscribeTransport(func(r *http.Request) (*http.Response, error) {
				calls++
				var payload map[string]any
				json.NewDecoder(r.Body).Decode(&payload)
				if payload["touser"] != tt.openid {
					t.Fatal("wrong WeChat recipient")
				}
				if payload["data"].(map[string]any)["thing2"].(map[string]any)["value"] != strings.Repeat("爱", 20) {
					t.Fatal("overlong content sent to WeChat")
				}
				return &http.Response{StatusCode: 200, Body: io.NopCloser(strings.NewReader(tt.response))}, nil
			})
			success := client.SendSubscribeMessage("2", "notify", map[string]string{"thing1": "new diary", "thing2": strings.Repeat("爱", 50)}, "", "10", "1")
			if success != tt.success || calls != tt.requests {
				t.Fatalf("success=%v requests=%d", success, calls)
			}
		})
	}
}

func TestSubscribeWithoutActivityStillRecords(t *testing.T) {
	db, _ := testdb.Open(t, []testdb.Step{
		{Match: "SELECT openid FROM users", Columns: []string{"openid"}, Rows: [][]driver.Value{{"recipient"}}},
		{Match: "SELECT id FROM subscribe_templates", Columns: []string{"id"}},
		{Match: "SELECT couple_id FROM users", Columns: []string{"couple_id"}, Rows: [][]driver.Value{{nil}}},
		{Match: "INSERT INTO subscribe_message_logs", Check: func(q string, args []any) error {
			v := testdb.InsertArgs(q, args)
			if v["activity_id"] != nil || v["to_openid"] != "recipient" || v["status"] != "failed" {
				t.Error("missing zero-activity log")
			}

			return nil
		}},
	})
	client := New("app", "secret", "template", t.TempDir(), store.WrapSQL(db))
	if client.SendSubscribeMessage("2", "notify", nil, "", "", "") {
		t.Fatal("unsubscribed send succeeded")
	}
}

func TestSuccessfulEventIsNotSentAgain(t *testing.T) {
	db, _ := testdb.Open(t, []testdb.Step{{Match: "SELECT status FROM notify_log", Columns: []string{"status"}, Rows: [][]driver.Value{{"success"}}}})
	client := New("app", "secret", "template", t.TempDir(), store.WrapSQL(db))
	client.http.Transport = subscribeTransport(func(*http.Request) (*http.Response, error) { t.Fatal("duplicate sent to WeChat"); return nil, nil })
	if !client.SendSubscribeMessage("2", "notify", nil, "", "10", "1") {
		t.Fatal("completed message must be treated as success")
	}
}

func TestThingNormalizationDoesNotMutateInput(t *testing.T) {
	input := map[string]string{"thing1": strings.Repeat("爱💕", 30), "thing2": "  ", "thing4": "行一\n行二", "date3": "2026-10-11"}
	output := normalizeSubscribeData(input)
	if len([]rune(output["thing1"])) != 20 || output["thing2"] == "" || output["thing4"] != "行一 行二" || output["date3"] != input["date3"] {
		t.Fatalf("wrong normalized fields: %v", output)
	}
	if output["thing1"] == input["thing1"] || input["thing2"] != "  " {
		t.Fatal("input was mutated")
	}
}