package httpapi_test

import (
	"net/http"
	"testing"
	"time"
)

// batchData 解一次批量动作的响应体。
type batchItemView struct {
	ID      int64  `json:"id"`
	OK      bool   `json:"ok"`
	Code    string `json:"code"`
	Message string `json:"message"`
}

type batchResultView struct {
	Action    string          `json:"action"`
	DryRun    bool            `json:"dryRun"`
	Requested int             `json:"requested"`
	Succeeded int             `json:"succeeded"`
	Failed    int             `json:"failed"`
	Items     []batchItemView `json:"items"`
	Purge     *struct {
		DeletedEntries  int     `json:"deletedEntries"`
		DeletedResults  int     `json:"deletedResults"`
		DeletedLedger   int     `json:"deletedLedger"`
		DeletedBreaks   int     `json:"deletedBreaks"`
		RecomputedEvent []int64 `json:"recomputedEvents"`
	} `json:"purge"`
}

func doBatch(t *testing.T, env *testEnv, client *http.Client, body map[string]any) batchResultView {
	t.Helper()
	status, env2 := env.do(client, http.MethodPost, "/api/athletes/batch", body, true)
	if status != http.StatusOK || !env2.OK {
		t.Fatalf("批量动作应 200，得到 %d %+v", status, env2.Error)
	}
	return decodeData[batchResultView](t, env2)
}

// auditCount 数某个 action 的审计条数；审计在响应之后落库，给一点重试窗口。
func auditCount(t *testing.T, env *testEnv, action string) int {
	t.Helper()
	for i := 0; i < 100; i++ {
		if n := countRows(t, env, `SELECT COUNT(*) FROM audit_logs WHERE action = ?`, action); n > 0 {
			return n
		}
		time.Sleep(10 * time.Millisecond)
	}
	return 0
}

// 一次请求停用 5 人：库内 5 行 active = 0，响应逐条成功，且只产生一条审计。
func TestBatchDisableAthletesOneRequest(t *testing.T) {
	env, ids, client := recorderWithSeed(t)
	targets := []int64{ids.athleteA, ids.athB}
	for _, name := range []string{"赵一", "钱二", "孙三"} {
		targets = append(targets, env.insert(t,
			`INSERT INTO athletes (name, gender, team_id, active) VALUES (?, '男', ?, 1)`, name, ids.teamA))
	}

	result := doBatch(t, env, client, map[string]any{"action": "disable", "ids": targets})
	if result.Action != "disable" || result.Requested != 5 || result.Succeeded != 5 || result.Failed != 0 {
		t.Fatalf("响应应为 5 成功 0 失败，得到 %+v", result)
	}
	for _, item := range result.Items {
		if !item.OK {
			t.Fatalf("每条都该成功，得到 %+v", item)
		}
	}
	if n := countRows(t, env, `SELECT COUNT(*) FROM athletes WHERE active = 0`); n != 5 {
		t.Fatalf("应有 5 人处于停用，得到 %d", n)
	}
	// 停用是软删除：报名与成绩一条不动。
	if n := countRows(t, env, `SELECT COUNT(*) FROM entries WHERE athlete_id = ?`, ids.athleteA); n != 1 {
		t.Fatalf("停用不该动报名，得到 %d 条", n)
	}
	if n := auditCount(t, env, "athlete.batch.disable"); n != 1 {
		t.Fatalf("整批只应写 1 条审计，得到 %d 条", n)
	}
}

// 混入不存在的 id：逐条回报，整批仍然成功，重复 id 只算一次。
func TestBatchDisableReportsMissingIDs(t *testing.T) {
	env, ids, client := recorderWithSeed(t)

	result := doBatch(t, env, client, map[string]any{
		"action": "disable", "ids": []int64{ids.athleteA, ids.athleteA, 999999},
	})
	if result.Requested != 2 || result.Succeeded != 1 || result.Failed != 1 {
		t.Fatalf("重复 id 应去重、缺失 id 应逐条失败，得到 %+v", result)
	}
	if len(result.Items) != 2 {
		t.Fatalf("应逐条回报 2 条，得到 %+v", result.Items)
	}
	missing := result.Items[1]
	if missing.ID != 999999 || missing.OK || missing.Code != "NOT_FOUND" || missing.Message != "运动员不存在" {
		t.Fatalf("缺失 id 应回报 运动员不存在，得到 %+v", missing)
	}
	if n := countRows(t, env, `SELECT COUNT(*) FROM athletes WHERE id = ? AND active = 0`, ids.athleteA); n != 1 {
		t.Fatalf("存在的那个人应被停用，得到 %d", n)
	}
}

// 批量彻底删除：删 2 人、重算一次受影响组别，第三个人升到第一并拿到 10 分；
// 缺失的 id 不影响其余两人被删掉。
func TestBatchPurgeRecomputesAndReportsPerItem(t *testing.T) {
	env, ids, client := recorderWithSeed(t)
	athC := env.insert(t, `INSERT INTO athletes (name, gender, team_id, active) VALUES ('王芳', '女', ?, 1)`, ids.teamA)
	entryC := env.insert(t, `INSERT INTO entries (event_id, category_id, team_id, athlete_id, status)
	                          VALUES (?, ?, ?, ?, 'registered')`, ids.event, ids.category, ids.teamA, athC)
	publishResults(t, env, client, ids.event, "batch-purge",
		map[string]any{"entryId": ids.entryA, "resultValue": 11.58, "resultText": "11.58", "unit": "s", "status": "ok"},
		map[string]any{"entryId": ids.entryB, "resultValue": 11.92, "resultText": "11.92", "unit": "s", "status": "ok"},
		map[string]any{"entryId": entryC, "resultValue": 12.10, "resultText": "12.10", "unit": "s", "status": "ok"},
	)
	// 前置：A 第一 10 分，C 第三 6 分。
	if got := activeLedgerPoints(t, env, entryC); !equalFloats(got, []float64{6}) {
		t.Fatalf("前置条件：C 应是 6 分，得到 %v", got)
	}

	result := doBatch(t, env, client, map[string]any{
		"action": "purge", "ids": []int64{ids.athleteA, ids.athB, 999999},
	})
	if result.Succeeded != 2 || result.Failed != 1 {
		t.Fatalf("应 2 成功 1 失败，得到 %+v", result)
	}
	if result.Purge == nil {
		t.Fatalf("purge 应带回删除规模，得到 %+v", result)
	}
	if result.Purge.DeletedEntries != 2 || result.Purge.DeletedResults != 2 || result.Purge.DeletedLedger != 2 {
		t.Fatalf("删除规模应为 报名2 / 成绩2 / 流水2，得到 %+v", result.Purge)
	}
	if len(result.Purge.RecomputedEvent) != 1 || result.Purge.RecomputedEvent[0] != ids.event {
		t.Fatalf("应重算 1 个受影响小项，得到 %+v", result.Purge.RecomputedEvent)
	}

	// 被删的两人痕迹全无，第三人原样保留。
	for _, id := range []int64{ids.athleteA, ids.athB} {
		if n := countRows(t, env, `SELECT COUNT(*) FROM athletes WHERE id = ?`, id); n != 0 {
			t.Fatalf("运动员 %d 应被删掉，得到 %d", id, n)
		}
	}
	if n := countRows(t, env, `SELECT COUNT(*) FROM entries WHERE athlete_id = ?`, athC); n != 1 {
		t.Fatalf("第三个人的报名不该被删，得到 %d", n)
	}
	// 别人的名次被重算：C 从第三升到第一，得分 6 → 10，单位总分跟着变。
	if got := activeLedgerPoints(t, env, entryC); !equalFloats(got, []float64{10}) {
		t.Fatalf("C 应随新名次重算成 10 分，得到 %v", got)
	}
	if got := teamPoints(t, env, client, ids.teamB); got != 0 {
		t.Fatalf("B 单位删空后总分应归零，得到 %v", got)
	}
	// 榜单也重算了：C 所在的 A 单位仍是 10 分（A 的 10 分换成了 C 的 10 分）。
	if got := teamPoints(t, env, client, ids.teamA); got != 10 {
		t.Fatalf("A 单位应保持 10 分，得到 %v", got)
	}
	if n := countRows(t, env, `SELECT COUNT(*) FROM score_ledger WHERE voided = 1`); n == 0 {
		t.Fatalf("重算应把旧流水作废留下来")
	}
	assertNoForeignKeyViolation(t, env)
	if n := auditCount(t, env, "athlete.batch.purge"); n != 1 {
		t.Fatalf("整批只应写 1 条审计，得到 %d 条", n)
	}
}

// dryRun 只统计不改库：预览数字与真删同源，但一行都不能动，也不该留审计。
func TestBatchPurgeDryRunChangesNothing(t *testing.T) {
	env, ids, client := recorderWithSeed(t)
	publishResults(t, env, client, ids.event, "batch-dry",
		map[string]any{"entryId": ids.entryA, "resultValue": 11.58, "resultText": "11.58", "unit": "s", "status": "ok"},
	)
	before := tableDump(t, env, `SELECT * FROM athletes ORDER BY id`) +
		tableDump(t, env, `SELECT * FROM entries ORDER BY id`) +
		tableDump(t, env, `SELECT * FROM results ORDER BY id`) +
		tableDump(t, env, `SELECT * FROM score_ledger ORDER BY id`)

	result := doBatch(t, env, client, map[string]any{
		"action": "purge", "ids": []int64{ids.athleteA}, "dryRun": true,
	})
	if !result.DryRun || result.Succeeded != 1 {
		t.Fatalf("预览应逐条成功并标记 dryRun，得到 %+v", result)
	}
	if result.Purge == nil || result.Purge.DeletedEntries != 1 || result.Purge.DeletedResults != 1 {
		t.Fatalf("预览应报出会删掉什么，得到 %+v", result.Purge)
	}
	if len(result.Purge.RecomputedEvent) != 1 {
		t.Fatalf("预览应报出会重算哪个小项，得到 %+v", result.Purge.RecomputedEvent)
	}

	after := tableDump(t, env, `SELECT * FROM athletes ORDER BY id`) +
		tableDump(t, env, `SELECT * FROM entries ORDER BY id`) +
		tableDump(t, env, `SELECT * FROM results ORDER BY id`) +
		tableDump(t, env, `SELECT * FROM score_ledger ORDER BY id`)
	if before != after {
		t.Fatalf("预览不该改动任何数据：\n%s\n---\n%s", before, after)
	}
	if n := countRows(t, env, `SELECT COUNT(*) FROM audit_logs WHERE action LIKE 'athlete.batch%'`); n != 0 {
		t.Fatalf("预览不该写审计，得到 %d 条", n)
	}
}

// 非法入参：action 只认 disable / purge，ids 去重后不能为空。
func TestBatchRejectsBadInput(t *testing.T) {
	env, ids, client := recorderWithSeed(t)

	for _, tc := range []struct {
		name string
		body map[string]any
		want string
	}{
		{"action 非法", map[string]any{"action": "delete", "ids": []int64{ids.athleteA}}, "action 只能是 disable / purge"},
		{"ids 为空", map[string]any{"action": "disable", "ids": []int64{}}, "ids 不能为空"},
		{"ids 全非法", map[string]any{"action": "purge", "ids": []int64{0, -3}}, "ids 不能为空"},
	} {
		status, env2 := env.do(client, http.MethodPost, "/api/athletes/batch", tc.body, true)
		if status != http.StatusBadRequest {
			t.Fatalf("%s 应 400，得到 %d %+v", tc.name, status, env2.Error)
		}
		if env2.Error == nil || env2.Error.Message != tc.want {
			t.Fatalf("%s 文案应为 %q，得到 %+v", tc.name, tc.want, env2.Error)
		}
	}
}

// 未登录的写操作一律 401，且不改动任何数据。
func TestBatchRequiresLogin(t *testing.T) {
	env := newTestEnv(t)
	ids := env.seed(t)
	client, _ := env.client()

	status, env2 := env.do(client, http.MethodPost, "/api/athletes/batch",
		map[string]any{"action": "disable", "ids": []int64{ids.athleteA}}, false)
	if status != http.StatusUnauthorized {
		t.Fatalf("未登录应 401，得到 %d %+v", status, env2.Error)
	}
	if n := countRows(t, env, `SELECT COUNT(*) FROM athletes WHERE id = ? AND active = 0`, ids.athleteA); n != 0 {
		t.Fatalf("被拒后不该改动数据，得到 %d", n)
	}
}