package flow

import (
	"testing"

	"ai-agent/workflow/model/entity"
)

// planSegmentResume：段序号从 params 的 segment_index 读出；已成功段复用，缺失/空地址需生成
func TestPlanSegmentResume(t *testing.T) {
	paramsList := []map[string]any{
		{"segment_index": 1}, {"segment_index": 2}, {"segment_index": 3}, {"segment_index": 4}, {"segment_index": 5},
	}
	saved := map[int]entity.SegmentRef{
		1: {Key: "video_url", URL: "u1"}, 2: {Key: "video_url", URL: "u2"},
		3: {Key: "video_url", URL: "u3"}, 5: {Key: "video_url", URL: "u5"},
	}
	idxList, needGen := planSegmentResume(paramsList, saved)
	if len(idxList) != 5 || len(needGen) != 5 {
		t.Fatalf("长度不符: idxList=%v needGen=%v", idxList, needGen)
	}
	want := []bool{false, false, false, true, false} // 仅段4需重新生成
	for i := range want {
		if needGen[i] != want[i] {
			t.Fatalf("needGen[%d]=%v 期望 %v", i, needGen[i], want[i])
		}
		if idxList[i] != i+1 {
			t.Fatalf("idxList[%d]=%d 期望 %d", i, idxList[i], i+1)
		}
	}
}

// planSegmentResume：无已成功段（全新执行）→ 全部需生成
func TestPlanSegmentResumeEmptySaved(t *testing.T) {
	paramsList := []map[string]any{{"segment_index": 0}, {"segment_index": 1}}
	_, needGen := planSegmentResume(paramsList, nil)
	for i := range needGen {
		if !needGen[i] {
			t.Fatalf("needGen[%d] 期望 true（无复用）", i)
		}
	}
}

// mergeSegmentOutputs：复用段 + 新生段按段序号升序，顺序即拼接顺序
func TestMergeSegmentOutputs(t *testing.T) {
	idxList := []int{1, 2, 3, 4, 5}
	needGen := []bool{false, false, false, true, false}
	newRes := make([][]map[string]any, 5)
	newRes[3] = []map[string]any{{"video_url": "new4"}}
	saved := map[int]entity.SegmentRef{
		1: {Key: "video_url", URL: "u1"}, 2: {Key: "video_url", URL: "u2"},
		3: {Key: "video_url", URL: "u3"}, 5: {Key: "video_url", URL: "u5"},
	}
	got := mergeSegmentOutputs(idxList, needGen, newRes, saved)
	if len(got) != 5 {
		t.Fatalf("合并后应有 5 段，实际 %d: %v", len(got), got)
	}
	wantURLs := []string{"u1", "u2", "u3", "new4", "u5"}
	for i, rec := range got {
		if rec["video_url"] != wantURLs[i] {
			t.Fatalf("第 %d 段=%v 期望 %s", i, rec, wantURLs[i])
		}
	}
}

// mergeSegmentOutputs：复用段 key 保持模型原字段，重建记录与新生记录 key 不一致也不影响顺序
func TestMergeSegmentOutputsMixedKeys(t *testing.T) {
	idxList := []int{1, 2, 3}
	needGen := []bool{false, true, false}
	newRes := make([][]map[string]any, 3)
	newRes[1] = []map[string]any{{"video_oss_url": "new2"}}
	saved := map[int]entity.SegmentRef{
		1: {Key: "video_url", URL: "u1"}, 3: {Key: "file_url", URL: "u3"},
	}
	got := mergeSegmentOutputs(idxList, needGen, newRes, saved)
	if len(got) != 3 {
		t.Fatalf("合并后应有 3 段，实际 %d: %v", len(got), got)
	}
	if got[0]["video_url"] != "u1" || got[1]["video_oss_url"] != "new2" || got[2]["file_url"] != "u3" {
		t.Fatalf("合并结果不符: %v", got)
	}
}

// mergeSegmentOutputs：paramsList 乱序时仍按段序号升序输出（顺序保证）
func TestMergeSegmentOutputsUnorderedParams(t *testing.T) {
	idxList := []int{3, 1, 2}
	needGen := []bool{true, false, true}
	newRes := make([][]map[string]any, 3)
	newRes[0] = []map[string]any{{"video_url": "new3"}}
	newRes[2] = []map[string]any{{"video_url": "new2"}}
	saved := map[int]entity.SegmentRef{1: {Key: "video_url", URL: "u1"}}
	got := mergeSegmentOutputs(idxList, needGen, newRes, saved)
	if len(got) != 3 {
		t.Fatalf("合并后应有 3 段，实际 %d: %v", len(got), got)
	}
	wantURLs := []string{"u1", "new2", "new3"}
	for i, rec := range got {
		if rec["video_url"] != wantURLs[i] {
			t.Fatalf("第 %d 段=%v 期望 %s（应段序升序）", i, rec, wantURLs[i])
		}
	}
}