#!/usr/bin/env bash
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
# shellcheck source=lib/common.sh
source "${SCRIPT_DIR}/lib/common.sh"

usage() {
    cat >&2 <<'EOF'
Usage: release.sh <tag> [--name NAME] [--notes TEXT] [--target BRANCH]
                      [--draft] [--prerelease] [--asset PATH]... [--repo NAME]

  <tag>         tag_name；若 tag 不存在 Gitea 會在 target 自動建
  --name        release 標題（預設同 tag）
  --notes       release 說明
  --target      target_commitish；預設 HEAD 所在分支
  --draft       建成 draft
  --prerelease  標記 prerelease
  --asset PATH  要上傳的附件（可重複）
  --repo NAME   指定 repo；省略則從 cwd origin 推斷
EOF
    exit 1
}

[[ $# -ge 1 ]] || usage

TAG=""
NAME=""
NOTES=""
TARGET=""
DRAFT=false
PRERELEASE=false
ASSETS=()
REPO_OVERRIDE=""

while [[ $# -gt 0 ]]; do
    case "$1" in
        --name)       [[ $# -ge 2 ]] || { log_err "--name 需要值"; exit 1; }; NAME="$2"; shift 2 ;;
        --notes)      [[ $# -ge 2 ]] || { log_err "--notes 需要值"; exit 1; }; NOTES="$2"; shift 2 ;;
        --target)     [[ $# -ge 2 ]] || { log_err "--target 需要值"; exit 1; }; TARGET="$2"; shift 2 ;;
        --draft)      DRAFT=true; shift ;;
        --prerelease) PRERELEASE=true; shift ;;
        --asset)      [[ $# -ge 2 ]] || { log_err "--asset 需要值"; exit 1; }; ASSETS+=("$2"); shift 2 ;;
        --repo)       [[ $# -ge 2 ]] || { log_err "--repo 需要值"; exit 1; }; REPO_OVERRIDE="$2"; shift 2 ;;
        -h|--help)    usage ;;
        -*)           log_err "未知參數：$1"; usage ;;
        *)
            if [[ -z "$TAG" ]]; then TAG="$1"; else log_err "多餘參數：$1"; usage; fi
            shift ;;
    esac
done

[[ -n "$TAG" ]] || usage
NAME="${NAME:-$TAG}"

load_config
require_cmd jq

if [[ -n "$REPO_OVERRIDE" ]]; then
    OWNER_REPO="${GITEA_USER}/${REPO_OVERRIDE}"
else
    if ! OWNER_REPO="$(infer_repo_from_cwd)"; then
        log_err "無法從 cwd 推斷 repo；請加 --repo"
        exit 1
    fi
fi

if [[ -z "$TARGET" ]]; then
    if git rev-parse --git-dir >/dev/null 2>&1; then
        TARGET="$(git rev-parse --abbrev-ref HEAD 2>/dev/null || true)"
    fi
fi

# 驗證 asset 路徑
for a in "${ASSETS[@]+"${ASSETS[@]}"}"; do
    if [[ ! -f "$a" ]]; then
        log_err "找不到 asset 檔案：$a"
        exit 1
    fi
done

# 組 release body
BODY="$(jq -n \
    --arg tag "$TAG" \
    --arg name "$NAME" \
    --arg body "$NOTES" \
    --arg target "$TARGET" \
    --argjson draft "$DRAFT" \
    --argjson prerelease "$PRERELEASE" \
    '{tag_name:$tag, name:$name, body:$body, draft:$draft, prerelease:$prerelease}
     + (if $target == "" then {} else {target_commitish:$target} end)')"

log_info "建立 release ${OWNER_REPO} / ${TAG}"
gitea_api POST "/repos/${OWNER_REPO}/releases" "$BODY"

case "$HTTP_CODE" in
    201) log_ok "release 已建立" ;;
    404) log_err "找不到 repo：${OWNER_REPO}"; exit 1 ;;
    *)   log_err "建立 release 失敗 (HTTP ${HTTP_CODE})"; { cat "$GITEA_API_RESP_FILE"; echo ""; } >&2; exit 1 ;;
esac

RELEASE_ID="$(jq -r '.id' < "$GITEA_API_RESP_FILE")"
RELEASE_URL="$(jq -r '.html_url' < "$GITEA_API_RESP_FILE")"

# stdout 先印 release URL
echo "$RELEASE_URL"

# 上傳 asset
FAILED=()
for a in "${ASSETS[@]+"${ASSETS[@]}"}"; do
    local_name="$(basename "$a")"
    log_info "上傳 asset：${local_name}"
    UP_RESP="$(mktemp)"
    UP_CODE="$(curl -sS -o "$UP_RESP" -w '%{http_code}' \
        -X POST \
        -H "Authorization: token ${GITEA_TOKEN}" \
        -F "attachment=@${a};filename=${local_name}" \
        "${GITEA_URL}/api/v1/repos/${OWNER_REPO}/releases/${RELEASE_ID}/assets?name=${local_name}")"
    case "$UP_CODE" in
        201)
            ASSET_URL="$(jq -r '.browser_download_url' < "$UP_RESP")"
            log_ok "$local_name"
            echo "$ASSET_URL"
            ;;
        *)
            log_err "上傳 ${local_name} 失敗 (HTTP ${UP_CODE})"
            cat "$UP_RESP" >&2
            echo "" >&2
            FAILED+=("$local_name")
            ;;
    esac
    rm -f "$UP_RESP"
done

if [[ ${#FAILED[@]} -gt 0 ]]; then
    log_err "部分 asset 上傳失敗：${FAILED[*]}"
    exit 1
fi

log_done "完成"