#!/bin/bash
# verify_t35.sh — 验收 T-3.5：前端本地 latest 快照语义 + fixture fallback 约定
set -e
SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
PROJECT_ROOT="$(dirname "$SCRIPT_DIR")"
MODELS_LIB="$PROJECT_ROOT/frontend/src/lib/models.ts"
GITIGNORE="$PROJECT_ROOT/.gitignore"
LATEST="$PROJECT_ROOT/frontend/src/data/latest_models.json"
FIXTURE="$PROJECT_ROOT/frontend/src/data/models.json"

echo "=== T-3.5 验收检查 ==="

# T-3.5.1: latest_models.json 视为本地运行快照，不纳入 git 跟踪
if grep -q '^frontend/src/data/latest_models.json$' "$GITIGNORE"; then
    echo "latest-ignore   PASS — latest_models.json 已被 .gitignore 标记为本地运行快照"
else
    echo "latest-ignore   FAIL"
    exit 1
fi

# T-3.5.2: 回退层在 models.ts 中定义 latest 优先 + models fixture fallback
if grep -q 'latest_models.json' "$MODELS_LIB" && \
   grep -q 'models.json' "$MODELS_LIB"; then
    echo "fallback-order PASS — latest 优先 + models fixture fallback 同时存在"
else
    echo "fallback-order FAIL"
    exit 1
fi

# T-3.5.3: committed fixture 必须长期存在，保证无 API 时仍能展示基础数据
if [ ! -f "$FIXTURE" ]; then
    echo "fixture-present FAIL — models.json fixture 不存在"
    exit 1
fi

if python3 - "$FIXTURE" <<'PY'
import json
import sys

path = sys.argv[1]
with open(path, "r", encoding="utf-8") as f:
    data = json.load(f)

assert isinstance(data.get("models"), list) and len(data["models"]) > 0
assert all("pricing" in model for model in data["models"])
PY
then
    echo "fixture-present PASS — models.json fixture 存在且结构可用"
else
    echo "fixture-present FAIL — models.json fixture 结构异常"
    exit 1
fi

# T-3.5.4: latest_models.json 如果存在，必须满足快照 schema 和免费模型归一化
if [ ! -f "$LATEST" ]; then
    echo "latest-optional PASS — latest_models.json 当前不存在，前端将回退到 committed fixture"
    echo ""
    echo "all PASS"
    exit 0
fi

if python3 - "$LATEST" <<'PY'
import json
import sys

path = sys.argv[1]
with open(path, "r", encoding="utf-8") as f:
    data = json.load(f)

free_models = [
    model for model in data.get("models", [])
    if isinstance(model.get("id"), str) and model["id"].endswith(":free")
]
if not free_models:
    raise SystemExit(1)

for model in free_models:
    pricing = model.get("pricing")
    if not isinstance(pricing, dict):
        raise SystemExit(1)
    if "input" not in pricing or "output" not in pricing:
        raise SystemExit(1)
    if pricing["input"] != 0 or pricing["output"] != 0:
        raise SystemExit(1)
PY
then
    echo "latest-schema   PASS — latest_models.json 存在且免费模型 pricing.input/output 均显式为 0"
else
    echo "latest-schema   FAIL — latest_models.json schema 异常或免费模型 pricing 未归一"
    exit 1
fi

echo ""
echo "all PASS"
exit 0